diff --git a/errors/error.go b/errors/error.go
index f0f05e0..850856d 100644
--- a/errors/error.go
+++ b/errors/error.go
@@ -17,7 +17,7 @@ type Error struct {
 func NewError(msg string, t *scanner.Token) *Error {
 	return &Error{
 		Msg: msg,
-		Pos: t.Position(),
+		Pos: t.Position,
 	}
 }
 
diff --git a/errors/error_test.go b/errors/error_test.go
index 37e62d4..d2e0484 100644
--- a/errors/error_test.go
+++ b/errors/error_test.go
@@ -27,7 +27,10 @@ func assertEqual(t *testing.T, expected interface{}, actual interface{}) {
 
 func TestConstructor(t *testing.T) {
 	pos := position.NewPosition(1, 2, 3, 4)
-	token := scanner.NewToken(`test`, pos)
+	token := &scanner.Token{
+		Value:    `test`,
+		Position: pos,
+	}
 
 	actual := errors.NewError("message", token)
 
@@ -41,7 +44,10 @@ func TestConstructor(t *testing.T) {
 
 func TestPrint(t *testing.T) {
 	pos := position.NewPosition(1, 2, 3, 4)
-	token := scanner.NewToken(`test`, pos)
+	token := &scanner.Token{
+		Value:    `test`,
+		Position: pos,
+	}
 
 	Error := errors.NewError("message", token)
 
diff --git a/parser/comments.go b/parser/comments.go
index 070d04a..d030cd5 100644
--- a/parser/comments.go
+++ b/parser/comments.go
@@ -15,7 +15,7 @@ func (c Comments) AddComments(node node.Node, comments []*comment.Comment) {
 }
 
 func (c Comments) AddFromToken(node node.Node, token *scanner.Token, tokenName comment.TokenName) {
-	comments := token.Comments()
+	comments := token.Comments
 
 	for _, cmt := range comments {
 		cmt.SetTokenName(tokenName)
diff --git a/parser/position_builder.go b/parser/position_builder.go
index 9b196b9..f528e20 100644
--- a/parser/position_builder.go
+++ b/parser/position_builder.go
@@ -101,25 +101,25 @@ func (b *PositionBuilder) NewNodePosition(n node.Node) *position.Position {
 
 // NewTokenPosition returns new Position
 func (b *PositionBuilder) NewTokenPosition(t *scanner.Token) *position.Position {
-	return t.Position()
+	return t.Position
 }
 
 // NewTokensPosition returns new Position
 func (b *PositionBuilder) NewTokensPosition(startToken *scanner.Token, endToken *scanner.Token) *position.Position {
 	return position.NewPosition(
-		startToken.Position().StartLine,
-		endToken.Position().EndLine,
-		startToken.Position().StartPos,
-		endToken.Position().EndPos,
+		startToken.Position.StartLine,
+		endToken.Position.EndLine,
+		startToken.Position.StartPos,
+		endToken.Position.EndPos,
 	)
 }
 
 // NewTokenNodePosition returns new Position
 func (b *PositionBuilder) NewTokenNodePosition(t *scanner.Token, n node.Node) *position.Position {
 	return position.NewPosition(
-		t.Position().StartLine,
+		t.Position.StartLine,
 		b.getNodeEndPos(n).endLine,
-		t.Position().StartPos,
+		t.Position.StartPos,
 		b.getNodeEndPos(n).endPos,
 	)
 }
@@ -128,9 +128,9 @@ func (b *PositionBuilder) NewTokenNodePosition(t *scanner.Token, n node.Node) *p
 func (b *PositionBuilder) NewNodeTokenPosition(n node.Node, t *scanner.Token) *position.Position {
 	return position.NewPosition(
 		b.getNodeStartPos(n).startLine,
-		t.Position().EndLine,
+		t.Position.EndLine,
 		b.getNodeStartPos(n).startPos,
-		t.Position().EndPos,
+		t.Position.EndPos,
 	)
 }
 
@@ -148,18 +148,18 @@ func (b *PositionBuilder) NewNodesPosition(startNode node.Node, endNode node.Nod
 func (b *PositionBuilder) NewNodeListTokenPosition(list []node.Node, t *scanner.Token) *position.Position {
 	return position.NewPosition(
 		b.getListStartPos(list).startLine,
-		t.Position().EndLine,
+		t.Position.EndLine,
 		b.getListStartPos(list).startPos,
-		t.Position().EndPos,
+		t.Position.EndPos,
 	)
 }
 
 // NewTokenNodeListPosition returns new Position
 func (b *PositionBuilder) NewTokenNodeListPosition(t *scanner.Token, list []node.Node) *position.Position {
 	return position.NewPosition(
-		t.Position().StartLine,
+		t.Position.StartLine,
 		b.getListEndPos(list).endLine,
-		t.Position().StartPos,
+		t.Position.StartPos,
 		b.getListEndPos(list).endPos,
 	)
 }
@@ -188,17 +188,17 @@ func (b *PositionBuilder) NewNodeListNodePosition(list []node.Node, n node.Node)
 func (b *PositionBuilder) NewOptionalListTokensPosition(list []node.Node, t *scanner.Token, endToken *scanner.Token) *position.Position {
 	if list == nil {
 		return position.NewPosition(
-			t.Position().StartLine,
-			endToken.Position().EndLine,
-			t.Position().StartPos,
-			endToken.Position().EndPos,
+			t.Position.StartLine,
+			endToken.Position.EndLine,
+			t.Position.StartPos,
+			endToken.Position.EndPos,
 		)
 	}
 
 	return position.NewPosition(
 		b.getListStartPos(list).startLine,
-		endToken.Position().EndLine,
+		endToken.Position.EndLine,
 		b.getListStartPos(list).startPos,
-		endToken.Position().EndPos,
+		endToken.Position.EndPos,
 	)
 }
diff --git a/parser/position_builder_test.go b/parser/position_builder_test.go
index 4b11c3a..3545773 100644
--- a/parser/position_builder_test.go
+++ b/parser/position_builder_test.go
@@ -14,7 +14,10 @@ func TestNewTokenPosition(t *testing.T) {
 	builder := parser.PositionBuilder{}
 
 	tpos := position.NewPosition(1, 1, 0, 3)
-	tkn := scanner.NewToken(`foo`, tpos)
+	tkn := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos,
+	}
 
 	pos := builder.NewTokenPosition(tkn)
 
@@ -27,9 +30,15 @@ func TestNewTokensPosition(t *testing.T) {
 	builder := parser.PositionBuilder{}
 
 	tpos1 := position.NewPosition(1, 1, 0, 3)
-	token1 := scanner.NewToken(`foo`, tpos1)
+	token1 := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos1,
+	}
 	tpos2 := position.NewPosition(2, 2, 4, 6)
-	token2 := scanner.NewToken(`foo`, tpos2)
+	token2 := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos2,
+	}
 
 	pos := builder.NewTokensPosition(token1, token2)
 
@@ -62,7 +71,10 @@ func TestNewNodePosition(t *testing.T) {
 
 func TestNewTokenNodePosition(t *testing.T) {
 	tpos := position.NewPosition(1, 1, 0, 3)
-	tkn := scanner.NewToken(`foo`, tpos)
+	tkn := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos,
+	}
 	n := node.NewIdentifier("test node")
 
 	p := &parser.Positions{}
@@ -87,7 +99,10 @@ func TestNewTokenNodePosition(t *testing.T) {
 func TestNewNodeTokenPosition(t *testing.T) {
 	n := node.NewIdentifier("test node")
 	tpos := position.NewPosition(2, 2, 10, 12)
-	tkn := scanner.NewToken(`foo`, tpos)
+	tkn := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos,
+	}
 
 	p := &parser.Positions{}
 	p.AddPosition(n, &position.Position{
@@ -168,7 +183,10 @@ func TestNewNodeListTokenPosition(t *testing.T) {
 	n1 := node.NewIdentifier("test node")
 	n2 := node.NewIdentifier("test node")
 	tpos := position.NewPosition(3, 3, 20, 22)
-	tkn := scanner.NewToken(`foo`, tpos)
+	tkn := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos,
+	}
 
 	builder := parser.PositionBuilder{
 		Positions: &parser.Positions{
@@ -196,7 +214,10 @@ func TestNewNodeListTokenPosition(t *testing.T) {
 
 func TestNewTokenNodeListPosition(t *testing.T) {
 	tpos := position.NewPosition(1, 1, 0, 2)
-	tkn := scanner.NewToken(`foo`, tpos)
+	tkn := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos,
+	}
 	n1 := node.NewIdentifier("test node")
 	n2 := node.NewIdentifier("test node")
 
@@ -298,9 +319,15 @@ func TestNewOptionalListTokensPosition(t *testing.T) {
 	builder := parser.PositionBuilder{}
 
 	tpos1 := position.NewPosition(1, 1, 0, 3)
-	token1 := scanner.NewToken(`foo`, tpos1)
+	token1 := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos1,
+	}
 	tpos2 := position.NewPosition(2, 2, 4, 6)
-	token2 := scanner.NewToken(`foo`, tpos2)
+	token2 := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos2,
+	}
 
 	pos := builder.NewOptionalListTokensPosition(nil, token1, token2)
 
@@ -338,9 +365,15 @@ func TestNewOptionalListTokensPosition2(t *testing.T) {
 	}
 
 	tpos1 := position.NewPosition(4, 4, 27, 29)
-	token1 := scanner.NewToken(`foo`, tpos1)
+	token1 := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos1,
+	}
 	tpos2 := position.NewPosition(5, 5, 30, 32)
-	token2 := scanner.NewToken(`foo`, tpos2)
+	token2 := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos2,
+	}
 
 	pos := builder.NewOptionalListTokensPosition([]node.Node{n2, n3}, token1, token2)
 
@@ -382,11 +415,14 @@ func TestNilNodeListPos(t *testing.T) {
 
 func TestNilNodeListTokenPos(t *testing.T) {
 	tpos := position.NewPosition(1, 1, 0, 3)
-	token1 := scanner.NewToken(`foo`, tpos)
+	token := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos,
+	}
 
 	builder := parser.PositionBuilder{}
 
-	pos := builder.NewNodeListTokenPosition(nil, token1)
+	pos := builder.NewNodeListTokenPosition(nil, token)
 
 	if pos.String() != `Pos{Line: -1-1 Pos: -1-3}` {
 		t.Errorf("token value is not equal\n")
@@ -416,11 +452,14 @@ func TestEmptyNodeListPos(t *testing.T) {
 
 func TestEmptyNodeListTokenPos(t *testing.T) {
 	tpos := position.NewPosition(1, 1, 0, 3)
-	token1 := scanner.NewToken(`foo`, tpos)
+	token := &scanner.Token{
+		Value:    `foo`,
+		Position: tpos,
+	}
 
 	builder := parser.PositionBuilder{}
 
-	pos := builder.NewNodeListTokenPosition([]node.Node{}, token1)
+	pos := builder.NewNodeListTokenPosition([]node.Node{}, token)
 
 	if pos.String() != `Pos{Line: -1-1 Pos: -1-3}` {
 		t.Errorf("token value is not equal\n")
diff --git a/php5/parser.go b/php5/parser.go
index ab3d6d7..57de209 100644
--- a/php5/parser.go
+++ b/php5/parser.go
@@ -117,3 +117,13 @@ func firstNode(nn []node.Node) node.Node {
 func isDollar(r rune) bool {
 	return r == '$'
 }
+
+func (p *Parser) returnTokenToPool(yyDollar []yySymType, yyVAL *yySymType) {
+	for i := 1; i < len(yyDollar); i++ {
+		if yyDollar[i].token != nil {
+			p.TokenPool.Put(yyDollar[i].token)
+		}
+		yyDollar[i].token = nil
+	}
+	yyVAL.token = nil
+}
diff --git a/php5/php5.go b/php5/php5.go
index 10a37fe..79eac1b 100644
--- a/php5/php5.go
+++ b/php5/php5.go
@@ -346,7 +346,7 @@ const yyEofCode = 1
 const yyErrCode = 2
 const yyInitialStackSize = 16
 
-//line php5/php5.y:5484
+//line php5/php5.y:6782
 
 type simpleIndirectReference struct {
 	all  []*expr.Variable
@@ -2330,24 +2330,30 @@ yydefault:
 		{
 			yylex.(*Parser).rootNode = node.NewRoot(yyDollar[1].list)
 			yylex.(*Parser).positions.AddPosition(yylex.(*Parser).rootNode, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 2:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:289
+		//line php5/php5.y:291
 		{
 			if yyDollar[2].node != nil {
 				yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 3:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:294
+		//line php5/php5.y:299
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 4:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:299
+		//line php5/php5.y:308
 		{
 			namePart := name.NewNamePart(yyDollar[1].token.Value)
 			yyVAL.list = []node.Node{namePart}
@@ -2357,10 +2363,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(namePart, yyDollar[1].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 5:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:310
+		//line php5/php5.y:321
 		{
 			namePart := name.NewNamePart(yyDollar[3].token.Value)
 			yyVAL.list = append(yyDollar[1].list, namePart)
@@ -2371,35 +2379,45 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.NsSeparatorToken)
 			yylex.(*Parser).comments.AddFromToken(namePart, yyDollar[3].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 6:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:325
+		//line php5/php5.y:338
 		{
 			// error
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 7:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:330
+		//line php5/php5.y:345
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 8:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:332
+		//line php5/php5.y:351
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 9:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:334
+		//line php5/php5.y:357
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 10:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:336
+		//line php5/php5.y:363
 		{
 			yyVAL.node = stmt.NewHaltCompiler()
 
@@ -2411,10 +2429,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 11:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:349
+		//line php5/php5.y:378
 		{
 			name := name.NewName(yyDollar[2].list)
 			yyVAL.node = stmt.NewNamespace(name, nil)
@@ -2426,10 +2446,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 12:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:362
+		//line php5/php5.y:393
 		{
 			name := name.NewName(yyDollar[2].list)
 			yyVAL.node = stmt.NewNamespace(name, yyDollar[4].list)
@@ -2442,10 +2464,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 13:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:376
+		//line php5/php5.y:409
 		{
 			yyVAL.node = stmt.NewNamespace(nil, yyDollar[3].list)
 
@@ -2456,10 +2480,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 14:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:388
+		//line php5/php5.y:423
 		{
 			yyVAL.node = stmt.NewUseList(nil, yyDollar[2].list)
 
@@ -2469,10 +2495,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UseToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 15:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:399
+		//line php5/php5.y:436
 		{
 			useType := node.NewIdentifier(yyDollar[2].token.Value)
 			yyVAL.node = stmt.NewUseList(useType, yyDollar[3].list)
@@ -2485,10 +2513,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UseToken)
 			yylex.(*Parser).comments.AddFromToken(useType, yyDollar[2].token, comment.UseToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 16:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:413
+		//line php5/php5.y:452
 		{
 			useType := node.NewIdentifier(yyDollar[2].token.Value)
 			yyVAL.node = stmt.NewUseList(useType, yyDollar[3].list)
@@ -2501,10 +2531,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UseToken)
 			yylex.(*Parser).comments.AddFromToken(useType, yyDollar[2].token, comment.UseToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 17:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:427
+		//line php5/php5.y:468
 		{
 			yyVAL.node = yyDollar[1].node
 
@@ -2513,25 +2545,31 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 18:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:440
+		//line php5/php5.y:483
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 19:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:447
+		//line php5/php5.y:492
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 20:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:452
+		//line php5/php5.y:501
 		{
 			name := name.NewName(yyDollar[1].list)
 			yyVAL.node = stmt.NewUse(nil, name, nil)
@@ -2539,10 +2577,12 @@ yydefault:
 			// save position
 			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 21:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:461
+		//line php5/php5.y:512
 		{
 			name := name.NewName(yyDollar[1].list)
 			alias := node.NewIdentifier(yyDollar[3].token.Value)
@@ -2556,10 +2596,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(alias, yyDollar[3].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 22:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:476
+		//line php5/php5.y:529
 		{
 			name := name.NewName(yyDollar[2].list)
 			yyVAL.node = stmt.NewUse(nil, name, nil)
@@ -2570,85 +2612,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 23:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:488
-		{
-			name := name.NewName(yyDollar[2].list)
-			alias := node.NewIdentifier(yyDollar[4].token.Value)
-			yyVAL.node = stmt.NewUse(nil, name, alias)
-
-			// save position
-			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[2].list))
-			yylex.(*Parser).positions.AddPosition(alias, yylex.(*Parser).positionBuilder.NewTokenPosition(yyDollar[4].token))
-			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListTokenPosition(yyDollar[2].list, yyDollar[4].token))
-
-			// save comments
-			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
-			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.AsToken)
-			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.StringToken)
-		}
-	case 24:
-		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:507
-		{
-			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
-
-			// save comments
-			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
-		}
-	case 25:
-		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:514
-		{
-			yyVAL.list = []node.Node{yyDollar[1].node}
-		}
-	case 26:
-		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:519
-		{
-			name := name.NewName(yyDollar[1].list)
-			yyVAL.node = stmt.NewUse(nil, name, nil)
-
-			// save position
-			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
-			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
-		}
-	case 27:
-		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:528
-		{
-			name := name.NewName(yyDollar[1].list)
-			alias := node.NewIdentifier(yyDollar[3].token.Value)
-			yyVAL.node = stmt.NewUse(nil, name, alias)
-
-			// save position
-			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
-			yylex.(*Parser).positions.AddPosition(alias, yylex.(*Parser).positionBuilder.NewTokenPosition(yyDollar[3].token))
-			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListTokenPosition(yyDollar[1].list, yyDollar[3].token))
-
-			// save comments
-			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
-			yylex.(*Parser).comments.AddFromToken(alias, yyDollar[3].token, comment.StringToken)
-		}
-	case 28:
-		yyDollar = yyS[yypt-2 : yypt+1]
 		//line php5/php5.y:543
-		{
-			name := name.NewName(yyDollar[2].list)
-			yyVAL.node = stmt.NewUse(nil, name, nil)
-
-			// save position
-			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[2].list))
-			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[2].list))
-
-			// save comments
-			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
-		}
-	case 29:
-		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:555
 		{
 			name := name.NewName(yyDollar[2].list)
 			alias := node.NewIdentifier(yyDollar[4].token.Value)
@@ -2663,25 +2632,31 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
-	case 30:
+	case 24:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:574
+		//line php5/php5.y:564
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
-	case 31:
+	case 25:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:581
+		//line php5/php5.y:573
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
-	case 32:
+	case 26:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:586
+		//line php5/php5.y:582
 		{
 			name := name.NewName(yyDollar[1].list)
 			yyVAL.node = stmt.NewUse(nil, name, nil)
@@ -2689,10 +2664,12 @@ yydefault:
 			// save position
 			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
-	case 33:
+	case 27:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:595
+		//line php5/php5.y:593
 		{
 			name := name.NewName(yyDollar[1].list)
 			alias := node.NewIdentifier(yyDollar[3].token.Value)
@@ -2706,8 +2683,10 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(alias, yyDollar[3].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
-	case 34:
+	case 28:
 		yyDollar = yyS[yypt-2 : yypt+1]
 		//line php5/php5.y:610
 		{
@@ -2720,10 +2699,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
-	case 35:
+	case 29:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:622
+		//line php5/php5.y:624
 		{
 			name := name.NewName(yyDollar[2].list)
 			alias := node.NewIdentifier(yyDollar[4].token.Value)
@@ -2738,10 +2719,99 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+		}
+	case 30:
+		yyDollar = yyS[yypt-3 : yypt+1]
+		//line php5/php5.y:645
+		{
+			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
+
+			// save comments
+			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+		}
+	case 31:
+		yyDollar = yyS[yypt-1 : yypt+1]
+		//line php5/php5.y:654
+		{
+			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+		}
+	case 32:
+		yyDollar = yyS[yypt-1 : yypt+1]
+		//line php5/php5.y:663
+		{
+			name := name.NewName(yyDollar[1].list)
+			yyVAL.node = stmt.NewUse(nil, name, nil)
+
+			// save position
+			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+		}
+	case 33:
+		yyDollar = yyS[yypt-3 : yypt+1]
+		//line php5/php5.y:674
+		{
+			name := name.NewName(yyDollar[1].list)
+			alias := node.NewIdentifier(yyDollar[3].token.Value)
+			yyVAL.node = stmt.NewUse(nil, name, alias)
+
+			// save position
+			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+			yylex.(*Parser).positions.AddPosition(alias, yylex.(*Parser).positionBuilder.NewTokenPosition(yyDollar[3].token))
+			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListTokenPosition(yyDollar[1].list, yyDollar[3].token))
+
+			// save comments
+			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
+			yylex.(*Parser).comments.AddFromToken(alias, yyDollar[3].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+		}
+	case 34:
+		yyDollar = yyS[yypt-2 : yypt+1]
+		//line php5/php5.y:691
+		{
+			name := name.NewName(yyDollar[2].list)
+			yyVAL.node = stmt.NewUse(nil, name, nil)
+
+			// save position
+			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[2].list))
+			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[2].list))
+
+			// save comments
+			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+		}
+	case 35:
+		yyDollar = yyS[yypt-4 : yypt+1]
+		//line php5/php5.y:705
+		{
+			name := name.NewName(yyDollar[2].list)
+			alias := node.NewIdentifier(yyDollar[4].token.Value)
+			yyVAL.node = stmt.NewUse(nil, name, alias)
+
+			// save position
+			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[2].list))
+			yylex.(*Parser).positions.AddPosition(alias, yylex.(*Parser).positionBuilder.NewTokenPosition(yyDollar[4].token))
+			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListTokenPosition(yyDollar[2].list, yyDollar[4].token))
+
+			// save comments
+			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
+			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.AsToken)
+			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 36:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:641
+		//line php5/php5.y:726
 		{
 			name := node.NewIdentifier(yyDollar[3].token.Value)
 			constant := stmt.NewConstant(name, yyDollar[5].node, "")
@@ -2758,10 +2828,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(lastNode(constList.Consts), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[3].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(constant, yyDollar[4].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 37:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:659
+		//line php5/php5.y:746
 		{
 			name := node.NewIdentifier(yyDollar[2].token.Value)
 			constant := stmt.NewConstant(name, yyDollar[4].node, "")
@@ -2777,49 +2849,63 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ConstToken)
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[2].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(constant, yyDollar[3].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 38:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:679
+		//line php5/php5.y:768
 		{
 			if yyDollar[2].node != nil {
 				yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 39:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:685
+		//line php5/php5.y:776
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 40:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:691
+		//line php5/php5.y:786
 		{
 			// error
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 41:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:696
+		//line php5/php5.y:793
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 42:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:698
+		//line php5/php5.y:799
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 43:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:700
+		//line php5/php5.y:805
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 44:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:702
+		//line php5/php5.y:811
 		{
 			yyVAL.node = stmt.NewHaltCompiler()
 
@@ -2831,16 +2917,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 45:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:719
+		//line php5/php5.y:830
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 46:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:721
+		//line php5/php5.y:836
 		{
 			label := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.node = stmt.NewLabel(label)
@@ -2852,10 +2942,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(label, yyDollar[1].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 47:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:737
+		//line php5/php5.y:854
 		{
 			yyVAL.node = stmt.NewStmtList(yyDollar[2].list)
 
@@ -2865,10 +2957,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 48:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:748
+		//line php5/php5.y:867
 		{
 			yyVAL.node = stmt.NewIf(yyDollar[2].node, yyDollar[3].node, yyDollar[4].list, yyDollar[5].node)
 
@@ -2883,10 +2977,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IfToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 49:
 		yyDollar = yyS[yypt-8 : yypt+1]
-		//line php5/php5.y:764
+		//line php5/php5.y:885
 		{
 			stmts := stmt.NewStmtList(yyDollar[4].list)
 			yyVAL.node = stmt.NewAltIf(yyDollar[2].node, stmts, yyDollar[5].list, yyDollar[6].node)
@@ -2900,10 +2996,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.EndifToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[8].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 50:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:779
+		//line php5/php5.y:902
 		{
 			switch n := yyDollar[3].node.(type) {
 			case *stmt.While:
@@ -2919,10 +3017,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.WhileToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 51:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:796
+		//line php5/php5.y:921
 		{
 			yyVAL.node = stmt.NewDo(yyDollar[2].node, yyDollar[4].node)
 
@@ -2933,10 +3033,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DoToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.WhileToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 52:
 		yyDollar = yyS[yypt-9 : yypt+1]
-		//line php5/php5.y:808
+		//line php5/php5.y:935
 		{
 			switch n := yyDollar[9].node.(type) {
 			case *stmt.For:
@@ -2960,10 +3062,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.ForInitSemicolonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.ForCondSemicolonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[8].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 53:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:833
+		//line php5/php5.y:962
 		{
 			switch n := yyDollar[3].node.(type) {
 			case *stmt.Switch:
@@ -2981,10 +3085,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.SwitchToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 54:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:852
+		//line php5/php5.y:983
 		{
 			yyVAL.node = stmt.NewBreak(nil)
 
@@ -2994,10 +3100,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.BreakToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 55:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:863
+		//line php5/php5.y:996
 		{
 			yyVAL.node = stmt.NewBreak(yyDollar[2].node)
 
@@ -3007,10 +3115,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.BreakToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 56:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:874
+		//line php5/php5.y:1009
 		{
 			yyVAL.node = stmt.NewContinue(nil)
 
@@ -3020,10 +3130,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ContinueToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 57:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:885
+		//line php5/php5.y:1022
 		{
 			yyVAL.node = stmt.NewContinue(yyDollar[2].node)
 
@@ -3033,10 +3145,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ContinueToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 58:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:896
+		//line php5/php5.y:1035
 		{
 			yyVAL.node = stmt.NewReturn(nil)
 
@@ -3046,10 +3160,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ReturnToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 59:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:907
+		//line php5/php5.y:1048
 		{
 			yyVAL.node = stmt.NewReturn(yyDollar[2].node)
 
@@ -3059,10 +3175,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ReturnToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 60:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:918
+		//line php5/php5.y:1061
 		{
 			yyVAL.node = stmt.NewReturn(yyDollar[2].node)
 
@@ -3072,10 +3190,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ReturnToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 61:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:929
+		//line php5/php5.y:1074
 		{
 			yyVAL.node = stmt.NewExpression(yyDollar[1].node)
 
@@ -3084,10 +3204,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 62:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:939
+		//line php5/php5.y:1086
 		{
 			yyVAL.node = stmt.NewGlobal(yyDollar[2].list)
 
@@ -3097,10 +3219,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.GlobalToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 63:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:950
+		//line php5/php5.y:1099
 		{
 			yyVAL.node = stmt.NewStatic(yyDollar[2].list)
 
@@ -3110,10 +3234,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StaticToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 64:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:961
+		//line php5/php5.y:1112
 		{
 			yyVAL.node = stmt.NewEcho(yyDollar[2].list)
 
@@ -3123,10 +3249,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.EchoToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 65:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:972
+		//line php5/php5.y:1125
 		{
 			yyVAL.node = stmt.NewInlineHtml(yyDollar[1].token.Value)
 
@@ -3135,10 +3263,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.InlineHTMLToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 66:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:982
+		//line php5/php5.y:1137
 		{
 			yyVAL.node = stmt.NewExpression(yyDollar[1].node)
 
@@ -3147,10 +3277,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 67:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:992
+		//line php5/php5.y:1149
 		{
 			yyVAL.node = stmt.NewUnset(yyDollar[3].list)
 
@@ -3162,10 +3294,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 68:
 		yyDollar = yyS[yypt-8 : yypt+1]
-		//line php5/php5.y:1005
+		//line php5/php5.y:1164
 		{
 			if yyDollar[6].node == nil {
 				switch n := yyDollar[8].node.(type) {
@@ -3199,10 +3333,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 69:
 		yyDollar = yyS[yypt-8 : yypt+1]
-		//line php5/php5.y:1040
+		//line php5/php5.y:1201
 		{
 			if yyDollar[6].node == nil {
 				switch n := yyDollar[8].node.(type) {
@@ -3236,10 +3372,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 70:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:1075
+		//line php5/php5.y:1238
 		{
 			yyVAL.node = stmt.NewDeclare(yyDollar[3].list, yyDollar[5].node)
 
@@ -3250,10 +3388,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DeclareToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 71:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1087
+		//line php5/php5.y:1252
 		{
 			yyVAL.node = stmt.NewNop()
 
@@ -3262,10 +3402,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 72:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php5/php5.y:1097
+		//line php5/php5.y:1264
 		{
 			yyVAL.node = stmt.NewTry(yyDollar[3].list, yyDollar[5].list, yyDollar[6].node)
 
@@ -3280,10 +3422,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.TryToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 73:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1113
+		//line php5/php5.y:1282
 		{
 			yyVAL.node = stmt.NewThrow(yyDollar[2].node)
 
@@ -3293,10 +3437,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ThrowToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 74:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1124
+		//line php5/php5.y:1295
 		{
 			label := node.NewIdentifier(yyDollar[2].token.Value)
 			yyVAL.node = stmt.NewGoto(label)
@@ -3309,16 +3455,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.GotoToken)
 			yylex.(*Parser).comments.AddFromToken(label, yyDollar[2].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 75:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1141
+		//line php5/php5.y:1314
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 76:
 		yyDollar = yyS[yypt-9 : yypt+1]
-		//line php5/php5.y:1143
+		//line php5/php5.y:1320
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[4].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -3337,16 +3487,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(catch, yyDollar[5].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(catch, yyDollar[6].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(catch, yyDollar[8].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 77:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1165
+		//line php5/php5.y:1345
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 78:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1167
+		//line php5/php5.y:1351
 		{
 			yyVAL.node = stmt.NewFinally(yyDollar[3].list)
 
@@ -3357,34 +3511,44 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.FinallyToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 79:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1182
+		//line php5/php5.y:1368
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 80:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1184
+		//line php5/php5.y:1374
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 81:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1189
+		//line php5/php5.y:1383
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 82:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1191
+		//line php5/php5.y:1389
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 83:
 		yyDollar = yyS[yypt-8 : yypt+1]
-		//line php5/php5.y:1196
+		//line php5/php5.y:1398
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[4].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -3402,67 +3566,79 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[8].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 84:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1218
+		//line php5/php5.y:1422
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 85:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1220
+		//line php5/php5.y:1428
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 86:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1230
+		//line php5/php5.y:1440
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 87:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1235
+		//line php5/php5.y:1449
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 88:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1240
+		//line php5/php5.y:1458
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 89:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1245
+		//line php5/php5.y:1467
 		{
 			yyVAL.token = nil
 		}
 	case 90:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1247
+		//line php5/php5.y:1471
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 91:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1252
+		//line php5/php5.y:1478
 		{
 			yyVAL.token = nil
 		}
 	case 92:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1254
+		//line php5/php5.y:1482
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 93:
 		yyDollar = yyS[yypt-9 : yypt+1]
-		//line php5/php5.y:1259
+		//line php5/php5.y:1489
 		{
 			name := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = stmt.NewFunction(name, yyDollar[2].token != nil, yyDollar[5].list, nil, yyDollar[8].list, "")
@@ -3481,10 +3657,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[9].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 94:
 		yyDollar = yyS[yypt-7 : yypt+1]
-		//line php5/php5.y:1282
+		//line php5/php5.y:1514
 		{
 			name := node.NewIdentifier(yyDollar[2].token.Value)
 			switch n := yyDollar[1].node.(type) {
@@ -3509,10 +3687,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[2].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 95:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php5/php5.y:1308
+		//line php5/php5.y:1542
 		{
 			name := node.NewIdentifier(yyDollar[2].token.Value)
 			yyVAL.node = stmt.NewInterface(name, yyDollar[3].InterfaceExtends, yyDollar[5].list, "")
@@ -3525,10 +3705,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[2].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 96:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1326
+		//line php5/php5.y:1562
 		{
 			yyVAL.node = stmt.NewClass(nil, nil, nil, nil, nil, nil, "")
 
@@ -3537,10 +3719,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ClassToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 97:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1336
+		//line php5/php5.y:1574
 		{
 			classModifier := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.node = stmt.NewClass(nil, []node.Node{classModifier}, nil, nil, nil, nil, "")
@@ -3552,10 +3736,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(classModifier, yyDollar[1].token, comment.AbstractToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ClassToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 98:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1349
+		//line php5/php5.y:1589
 		{
 			yyVAL.node = stmt.NewTrait(nil, nil, "")
 
@@ -3564,10 +3750,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.TraitToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 99:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1359
+		//line php5/php5.y:1601
 		{
 			classModifier := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.node = stmt.NewClass(nil, []node.Node{classModifier}, nil, nil, nil, nil, "")
@@ -3579,16 +3767,20 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(classModifier, yyDollar[1].token, comment.FinalToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ClassToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 100:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1375
+		//line php5/php5.y:1619
 		{
 			yyVAL.ClassExtends = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 101:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1377
+		//line php5/php5.y:1625
 		{
 			yyVAL.ClassExtends = stmt.NewClassExtends(yyDollar[2].node)
 
@@ -3597,22 +3789,26 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.ClassExtends, yyDollar[1].token, comment.ExtendsToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 102:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1390
+		//line php5/php5.y:1640
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 103:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1395
+		//line php5/php5.y:1647
 		{
 			yyVAL.InterfaceExtends = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 104:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1397
+		//line php5/php5.y:1653
 		{
 			yyVAL.InterfaceExtends = stmt.NewInterfaceExtends(yyDollar[2].list)
 
@@ -3621,16 +3817,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.InterfaceExtends, yyDollar[1].token, comment.ExtendsToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 105:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1410
+		//line php5/php5.y:1668
 		{
 			yyVAL.ClassImplements = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 106:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1412
+		//line php5/php5.y:1674
 		{
 			yyVAL.ClassImplements = stmt.NewClassImplements(yyDollar[2].list)
 
@@ -3639,46 +3839,58 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.ClassImplements, yyDollar[1].token, comment.ImplementsToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 107:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1425
+		//line php5/php5.y:1689
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 108:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1427
+		//line php5/php5.y:1695
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 109:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1437
+		//line php5/php5.y:1707
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 110:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1439
+		//line php5/php5.y:1713
 		{
 			yyVAL.node = yyDollar[2].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DoubleArrowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 111:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1449
+		//line php5/php5.y:1725
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 112:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1451
+		//line php5/php5.y:1731
 		{
 			yyVAL.node = expr.NewReference(yyDollar[2].node)
 
@@ -3687,10 +3899,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 113:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1461
+		//line php5/php5.y:1743
 		{
 			yyVAL.node = expr.NewList(yyDollar[3].list)
 
@@ -3701,19 +3915,23 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ListToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 114:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1476
+		//line php5/php5.y:1760
 		{
 			yyVAL.node = stmt.NewFor(nil, nil, nil, yyDollar[1].node)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 115:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1483
+		//line php5/php5.y:1769
 		{
 			stmtList := stmt.NewStmtList(yyDollar[2].list)
 			yyVAL.node = stmt.NewAltFor(nil, nil, nil, stmtList)
@@ -3726,19 +3944,23 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.EndforToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 116:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1500
+		//line php5/php5.y:1788
 		{
 			yyVAL.node = stmt.NewForeach(nil, nil, nil, yyDollar[1].node)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 117:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1507
+		//line php5/php5.y:1797
 		{
 			stmtList := stmt.NewStmtList(yyDollar[2].list)
 			yyVAL.node = stmt.NewAltForeach(nil, nil, nil, stmtList)
@@ -3751,16 +3973,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.EndforeachToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 118:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1525
+		//line php5/php5.y:1817
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 119:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1527
+		//line php5/php5.y:1823
 		{
 			yyVAL.node = stmt.NewStmtList(yyDollar[2].list)
 
@@ -3771,10 +3997,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.EnddeclareToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 120:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1543
+		//line php5/php5.y:1841
 		{
 			name := node.NewIdentifier(yyDollar[1].token.Value)
 			constant := stmt.NewConstant(name, yyDollar[3].node, "")
@@ -3787,10 +4015,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[1].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(constant, yyDollar[2].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 121:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:1557
+		//line php5/php5.y:1857
 		{
 			name := node.NewIdentifier(yyDollar[3].token.Value)
 			constant := stmt.NewConstant(name, yyDollar[5].node, "")
@@ -3804,10 +4034,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[3].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(constant, yyDollar[4].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 122:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1576
+		//line php5/php5.y:1878
 		{
 			caseList := stmt.NewCaseList(yyDollar[2].list)
 			yyVAL.node = stmt.NewSwitch(nil, caseList)
@@ -3819,10 +4051,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 123:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1589
+		//line php5/php5.y:1893
 		{
 			caseList := stmt.NewCaseList(yyDollar[3].list)
 			yyVAL.node = stmt.NewSwitch(nil, caseList)
@@ -3835,10 +4069,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[2].token, comment.SemiColonToken)
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 124:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1603
+		//line php5/php5.y:1909
 		{
 			caseList := stmt.NewCaseList(yyDollar[2].list)
 			yyVAL.node = stmt.NewAltSwitch(nil, caseList)
@@ -3851,10 +4087,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[1].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[3].token, comment.EndswitchToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 125:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:1617
+		//line php5/php5.y:1925
 		{
 
 			caseList := stmt.NewCaseList(yyDollar[3].list)
@@ -3869,16 +4107,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[2].token, comment.SemiColonToken)
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[4].token, comment.EndswitchToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 126:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1637
+		//line php5/php5.y:1947
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 127:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:1639
+		//line php5/php5.y:1953
 		{
 			_case := stmt.NewCase(yyDollar[3].node, yyDollar[5].list)
 			yyVAL.list = append(yyDollar[1].list, _case)
@@ -3889,10 +4131,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(_case, yyDollar[2].token, comment.CaseToken)
 			yylex.(*Parser).comments.AddFromToken(_case, yyDollar[4].token, comment.CaseSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 128:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1651
+		//line php5/php5.y:1967
 		{
 			_default := stmt.NewDefault(yyDollar[4].list)
 			yyVAL.list = append(yyDollar[1].list, _default)
@@ -3903,31 +4147,35 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(_default, yyDollar[2].token, comment.DefaultToken)
 			yylex.(*Parser).comments.AddFromToken(_default, yyDollar[3].token, comment.CaseSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 129:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1667
+		//line php5/php5.y:1985
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 130:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1669
+		//line php5/php5.y:1989
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 131:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1675
+		//line php5/php5.y:1997
 		{
 			yyVAL.node = stmt.NewWhile(nil, yyDollar[1].node)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 132:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1682
+		//line php5/php5.y:2006
 		{
 			stmtList := stmt.NewStmtList(yyDollar[2].list)
 			yyVAL.node = stmt.NewAltWhile(nil, stmtList)
@@ -3940,16 +4188,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.EndwhileToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 133:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1701
+		//line php5/php5.y:2027
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 134:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1703
+		//line php5/php5.y:2033
 		{
 			_elseIf := stmt.NewElseIf(yyDollar[3].node, yyDollar[4].node)
 			yyVAL.list = append(yyDollar[1].list, _elseIf)
@@ -3959,16 +4211,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(_elseIf, yyDollar[2].token, comment.ElseifToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 135:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1718
+		//line php5/php5.y:2050
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 136:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:1720
+		//line php5/php5.y:2056
 		{
 			stmts := stmt.NewStmtList(yyDollar[5].list)
 			_elseIf := stmt.NewAltElseIf(yyDollar[3].node, stmts)
@@ -3981,16 +4237,20 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(_elseIf, yyDollar[2].token, comment.ElseifToken)
 			yylex.(*Parser).comments.AddFromToken(_elseIf, yyDollar[4].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 137:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1738
+		//line php5/php5.y:2076
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 138:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1740
+		//line php5/php5.y:2082
 		{
 			yyVAL.node = stmt.NewElse(yyDollar[2].node)
 
@@ -3999,16 +4259,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ElseToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 139:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1754
+		//line php5/php5.y:2098
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 140:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1756
+		//line php5/php5.y:2104
 		{
 			stmts := stmt.NewStmtList(yyDollar[3].list)
 			yyVAL.node = stmt.NewAltElse(stmts)
@@ -4020,37 +4284,47 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ElseToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 141:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1773
+		//line php5/php5.y:2123
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 142:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1775
+		//line php5/php5.y:2129
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 143:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1780
+		//line php5/php5.y:2138
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 144:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1782
+		//line php5/php5.y:2144
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 145:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:1792
+		//line php5/php5.y:2156
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[4].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4077,10 +4351,12 @@ yydefault:
 				yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.EllipsisToken)
 			}
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[4].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 146:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php5/php5.y:1820
+		//line php5/php5.y:2186
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[4].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4108,16 +4384,20 @@ yydefault:
 			}
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[4].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 147:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:1853
+		//line php5/php5.y:2221
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 148:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1855
+		//line php5/php5.y:2227
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4126,10 +4406,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ArrayToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 149:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1865
+		//line php5/php5.y:2239
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4138,16 +4420,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.CallableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 150:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1875
+		//line php5/php5.y:2251
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 151:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1881
+		//line php5/php5.y:2261
 		{
 			yyVAL.node = node.NewArgumentList(nil)
 
@@ -4157,10 +4443,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 152:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1892
+		//line php5/php5.y:2274
 		{
 			yyVAL.node = node.NewArgumentList(yyDollar[2].list)
 
@@ -4170,10 +4458,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 153:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1903
+		//line php5/php5.y:2287
 		{
 			arg := node.NewArgument(yyDollar[2].node, false, false)
 			yyVAL.node = node.NewArgumentList([]node.Node{arg})
@@ -4185,43 +4475,53 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 154:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1920
+		//line php5/php5.y:2306
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 155:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1922
+		//line php5/php5.y:2312
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 156:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1932
+		//line php5/php5.y:2324
 		{
 			yyVAL.node = node.NewArgument(yyDollar[1].node, false, false)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 157:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1939
+		//line php5/php5.y:2333
 		{
 			yyVAL.node = node.NewArgument(yyDollar[1].node, false, false)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 158:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1946
+		//line php5/php5.y:2342
 		{
 			yyVAL.node = node.NewArgument(yyDollar[2].node, false, true)
 
@@ -4230,10 +4530,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 159:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1956
+		//line php5/php5.y:2354
 		{
 			yyVAL.node = node.NewArgument(yyDollar[2].node, true, false)
 
@@ -4242,25 +4544,31 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.EllipsisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 160:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:1969
+		//line php5/php5.y:2369
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 161:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1976
+		//line php5/php5.y:2378
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 162:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:1982
+		//line php5/php5.y:2388
 		{
 			name := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			yyVAL.node = expr.NewVariable(name)
@@ -4271,10 +4579,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 163:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:1994
+		//line php5/php5.y:2402
 		{
 			yyVAL.node = expr.NewVariable(yyDollar[2].node)
 
@@ -4283,10 +4593,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DollarToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 164:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:2004
+		//line php5/php5.y:2414
 		{
 			yyVAL.node = expr.NewVariable(yyDollar[3].node)
 
@@ -4297,10 +4609,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DollarToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 165:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2020
+		//line php5/php5.y:2432
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[3].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4315,10 +4629,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[3].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 166:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:2036
+		//line php5/php5.y:2450
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[3].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4334,10 +4650,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[3].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(staticVar, yyDollar[4].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 167:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2053
+		//line php5/php5.y:2469
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4351,10 +4669,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 168:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2068
+		//line php5/php5.y:2486
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4369,22 +4689,28 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(staticVar, yyDollar[2].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 169:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2088
+		//line php5/php5.y:2508
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 170:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:2090
+		//line php5/php5.y:2514
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 171:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2096
+		//line php5/php5.y:2524
 		{
 			yyVAL.node = stmt.NewPropertyList(yyDollar[1].list, yyDollar[2].list)
 
@@ -4393,10 +4719,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 172:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2106
+		//line php5/php5.y:2536
 		{
 			yyVAL.node = yyDollar[1].node
 
@@ -4405,16 +4733,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 173:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2116
+		//line php5/php5.y:2548
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 174:
 		yyDollar = yyS[yypt-8 : yypt+1]
-		//line php5/php5.y:2120
+		//line php5/php5.y:2554
 		{
 			name := node.NewIdentifier(yyDollar[4].token.Value)
 			yyVAL.node = stmt.NewClassMethod(name, yyDollar[1].list, yyDollar[3].token != nil, yyDollar[6].list, nil, yyDollar[8].node, "")
@@ -4435,10 +4767,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[4].token, comment.IdentifierToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 175:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2145
+		//line php5/php5.y:2581
 		{
 			var adaptationList *stmt.TraitAdaptationList
 			switch n := yyDollar[3].node.(type) {
@@ -4454,25 +4788,31 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UseToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 176:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2165
+		//line php5/php5.y:2603
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 177:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2167
+		//line php5/php5.y:2609
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 178:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2177
+		//line php5/php5.y:2621
 		{
 			yyVAL.node = stmt.NewNop()
 
@@ -4481,10 +4821,11 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.SemiColonToken)
 
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 179:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2187
+		//line php5/php5.y:2633
 		{
 			yyVAL.node = stmt.NewTraitAdaptationList(yyDollar[2].list)
 
@@ -4493,52 +4834,66 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 180:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:2200
+		//line php5/php5.y:2648
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 181:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2202
+		//line php5/php5.y:2654
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 182:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2207
+		//line php5/php5.y:2663
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 183:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2209
+		//line php5/php5.y:2669
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 184:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2214
+		//line php5/php5.y:2678
 		{
 			yyVAL.node = yyDollar[1].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 185:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2221
+		//line php5/php5.y:2687
 		{
 			yyVAL.node = yyDollar[1].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 186:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2231
+		//line php5/php5.y:2699
 		{
 			yyVAL.node = stmt.NewTraitUsePrecedence(yyDollar[1].node, yyDollar[3].list)
 
@@ -4547,25 +4902,31 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.InsteadofToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 187:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2244
+		//line php5/php5.y:2714
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 188:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2246
+		//line php5/php5.y:2720
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 189:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2256
+		//line php5/php5.y:2732
 		{
 			name := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.node = stmt.NewTraitMethodRef(nil, name)
@@ -4576,16 +4937,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[1].token, comment.IdentifierToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 190:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2268
+		//line php5/php5.y:2746
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 191:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2273
+		//line php5/php5.y:2755
 		{
 			target := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = stmt.NewTraitMethodRef(yyDollar[1].node, target)
@@ -4597,10 +4962,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
 			yylex.(*Parser).comments.AddFromToken(target, yyDollar[3].token, comment.IdentifierToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 192:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:2289
+		//line php5/php5.y:2773
 		{
 			alias := node.NewIdentifier(yyDollar[4].token.Value)
 			yyVAL.node = stmt.NewTraitUseAlias(yyDollar[1].node, yyDollar[3].node, alias)
@@ -4612,10 +4979,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(alias, yyDollar[4].token, comment.IdentifierToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 193:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2302
+		//line php5/php5.y:2788
 		{
 			yyVAL.node = stmt.NewTraitUseAlias(yyDollar[1].node, yyDollar[3].node, nil)
 
@@ -4624,22 +4993,28 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 194:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:2315
+		//line php5/php5.y:2803
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 195:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2317
+		//line php5/php5.y:2809
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 196:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2322
+		//line php5/php5.y:2818
 		{
 			yyVAL.node = stmt.NewNop()
 
@@ -4648,10 +5023,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 197:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2332
+		//line php5/php5.y:2830
 		{
 			yyVAL.node = stmt.NewStmtList(yyDollar[2].list)
 
@@ -4661,16 +5038,20 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 198:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2346
+		//line php5/php5.y:2846
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 199:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2348
+		//line php5/php5.y:2852
 		{
 			modifier := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.list = []node.Node{modifier}
@@ -4680,34 +5061,44 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(modifier, yyDollar[1].token, comment.VarToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 200:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:2362
+		//line php5/php5.y:2868
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 201:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2364
+		//line php5/php5.y:2874
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 202:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2369
+		//line php5/php5.y:2883
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 203:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2371
+		//line php5/php5.y:2889
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 204:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2376
+		//line php5/php5.y:2898
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4716,10 +5107,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.PublicToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 205:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2386
+		//line php5/php5.y:2910
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4728,10 +5121,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ProtectedToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 206:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2396
+		//line php5/php5.y:2922
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4740,10 +5135,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.PrivateToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 207:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2406
+		//line php5/php5.y:2934
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4752,10 +5149,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StaticToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 208:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2416
+		//line php5/php5.y:2946
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4764,10 +5163,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.AbstractToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 209:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2426
+		//line php5/php5.y:2958
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4776,10 +5177,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.FinalToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 210:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2439
+		//line php5/php5.y:2973
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[3].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4794,10 +5197,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[3].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 211:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:2455
+		//line php5/php5.y:2991
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[3].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4813,10 +5218,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[3].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(property, yyDollar[4].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 212:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2472
+		//line php5/php5.y:3010
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4830,10 +5237,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 213:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2487
+		//line php5/php5.y:3027
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4848,10 +5257,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(property, yyDollar[2].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 214:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:2506
+		//line php5/php5.y:3048
 		{
 			name := node.NewIdentifier(yyDollar[3].token.Value)
 			constant := stmt.NewConstant(name, yyDollar[5].node, "")
@@ -4868,10 +5279,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(lastNode(constList.Consts), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[3].token, comment.IdentifierToken)
 			yylex.(*Parser).comments.AddFromToken(constant, yyDollar[4].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 215:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:2524
+		//line php5/php5.y:3068
 		{
 			name := node.NewIdentifier(yyDollar[2].token.Value)
 			constant := stmt.NewConstant(name, yyDollar[4].node, "")
@@ -4886,64 +5299,82 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ConstToken)
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[2].token, comment.IdentifierToken)
 			yylex.(*Parser).comments.AddFromToken(constant, yyDollar[3].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 216:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2543
+		//line php5/php5.y:3089
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 217:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2550
+		//line php5/php5.y:3098
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 218:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:2556
+		//line php5/php5.y:3108
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 219:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2558
+		//line php5/php5.y:3114
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 220:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2563
+		//line php5/php5.y:3123
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 221:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2570
+		//line php5/php5.y:3132
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 222:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2575
+		//line php5/php5.y:3141
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].list...)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 223:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2577
+		//line php5/php5.y:3147
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 224:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:2582
+		//line php5/php5.y:3156
 		{
 			fetch := expr.NewArrayDimFetch(nil, yyDollar[3].node)
 			yyVAL.list = append(yyDollar[1].list, fetch)
@@ -4954,10 +5385,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 225:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2594
+		//line php5/php5.y:3170
 		{
 			fetch := expr.NewArrayDimFetch(nil, yyDollar[2].node)
 			yyVAL.list = []node.Node{fetch}
@@ -4968,40 +5401,52 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[1].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[3].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 226:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2609
+		//line php5/php5.y:3187
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].list...)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 227:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2611
+		//line php5/php5.y:3193
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 228:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2613
+		//line php5/php5.y:3199
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 229:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:2618
+		//line php5/php5.y:3208
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 230:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:2620
+		//line php5/php5.y:3214
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 231:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2625
+		//line php5/php5.y:3223
 		{
 
 			if yyDollar[3].node != nil {
@@ -5014,10 +5459,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NewToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 232:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php5/php5.y:2642
+		//line php5/php5.y:3242
 		{
 			list := expr.NewList(yyDollar[3].list)
 			yyVAL.node = assign.NewAssign(list, yyDollar[6].node)
@@ -5031,10 +5478,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(list, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(list, yyDollar[4].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 233:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2657
+		//line php5/php5.y:3259
 		{
 			yyVAL.node = assign.NewAssign(yyDollar[1].node, yyDollar[3].node)
 
@@ -5043,10 +5492,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 234:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:2667
+		//line php5/php5.y:3271
 		{
 			yyVAL.node = assign.NewReference(yyDollar[1].node, yyDollar[4].node)
 
@@ -5056,10 +5507,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.EqualToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 235:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php5/php5.y:2678
+		//line php5/php5.y:3284
 		{
 			var _new *expr.New
 
@@ -5082,10 +5535,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.EqualToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.AmpersandToken)
 			yylex.(*Parser).comments.AddFromToken(_new, yyDollar[4].token, comment.NewToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 236:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2702
+		//line php5/php5.y:3310
 		{
 			yyVAL.node = expr.NewClone(yyDollar[2].node)
 
@@ -5094,10 +5549,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.CloneToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 237:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2712
+		//line php5/php5.y:3322
 		{
 			yyVAL.node = assign.NewPlus(yyDollar[1].node, yyDollar[3].node)
 
@@ -5106,10 +5563,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PlusEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 238:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2722
+		//line php5/php5.y:3334
 		{
 			yyVAL.node = assign.NewMinus(yyDollar[1].node, yyDollar[3].node)
 
@@ -5118,10 +5577,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.MinusEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 239:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2732
+		//line php5/php5.y:3346
 		{
 			yyVAL.node = assign.NewMul(yyDollar[1].node, yyDollar[3].node)
 
@@ -5130,10 +5591,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.MulEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 240:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2742
+		//line php5/php5.y:3358
 		{
 			yyVAL.node = assign.NewPow(yyDollar[1].node, yyDollar[3].node)
 
@@ -5142,10 +5605,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PowEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 241:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2752
+		//line php5/php5.y:3370
 		{
 			yyVAL.node = assign.NewDiv(yyDollar[1].node, yyDollar[3].node)
 
@@ -5154,10 +5619,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.DivEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 242:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2762
+		//line php5/php5.y:3382
 		{
 			yyVAL.node = assign.NewConcat(yyDollar[1].node, yyDollar[3].node)
 
@@ -5166,10 +5633,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ConcatEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 243:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2772
+		//line php5/php5.y:3394
 		{
 			yyVAL.node = assign.NewMod(yyDollar[1].node, yyDollar[3].node)
 
@@ -5178,10 +5647,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ModEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 244:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2782
+		//line php5/php5.y:3406
 		{
 			yyVAL.node = assign.NewBitwiseAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -5190,10 +5661,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AndEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 245:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2792
+		//line php5/php5.y:3418
 		{
 			yyVAL.node = assign.NewBitwiseOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -5202,10 +5675,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OrEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 246:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2802
+		//line php5/php5.y:3430
 		{
 			yyVAL.node = assign.NewBitwiseXor(yyDollar[1].node, yyDollar[3].node)
 
@@ -5214,10 +5689,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.XorEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 247:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2812
+		//line php5/php5.y:3442
 		{
 			yyVAL.node = assign.NewShiftLeft(yyDollar[1].node, yyDollar[3].node)
 
@@ -5226,10 +5703,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SlEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 248:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2822
+		//line php5/php5.y:3454
 		{
 			yyVAL.node = assign.NewShiftRight(yyDollar[1].node, yyDollar[3].node)
 
@@ -5238,10 +5717,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SrEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 249:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2832
+		//line php5/php5.y:3466
 		{
 			yyVAL.node = expr.NewPostInc(yyDollar[1].node)
 
@@ -5250,10 +5731,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IncToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 250:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2842
+		//line php5/php5.y:3478
 		{
 			yyVAL.node = expr.NewPreInc(yyDollar[2].node)
 
@@ -5262,10 +5745,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IncToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 251:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2852
+		//line php5/php5.y:3490
 		{
 			yyVAL.node = expr.NewPostDec(yyDollar[1].node)
 
@@ -5274,10 +5759,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.DecToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 252:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:2862
+		//line php5/php5.y:3502
 		{
 			yyVAL.node = expr.NewPreDec(yyDollar[2].node)
 
@@ -5286,10 +5773,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DecToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 253:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2872
+		//line php5/php5.y:3514
 		{
 			yyVAL.node = binary.NewBooleanOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -5298,10 +5787,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.BooleanOrToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 254:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2882
+		//line php5/php5.y:3526
 		{
 			yyVAL.node = binary.NewBooleanAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -5310,10 +5801,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.BooleanAndToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 255:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2892
+		//line php5/php5.y:3538
 		{
 			yyVAL.node = binary.NewLogicalOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -5322,10 +5815,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LogicalOrToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 256:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2902
+		//line php5/php5.y:3550
 		{
 			yyVAL.node = binary.NewLogicalAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -5334,10 +5829,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LogicalAndToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 257:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2912
+		//line php5/php5.y:3562
 		{
 			yyVAL.node = binary.NewLogicalXor(yyDollar[1].node, yyDollar[3].node)
 
@@ -5346,10 +5843,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LogicalXorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 258:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2922
+		//line php5/php5.y:3574
 		{
 			yyVAL.node = binary.NewBitwiseOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -5358,10 +5857,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.VerticalBarToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 259:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2932
+		//line php5/php5.y:3586
 		{
 			yyVAL.node = binary.NewBitwiseAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -5370,10 +5871,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 260:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2942
+		//line php5/php5.y:3598
 		{
 			yyVAL.node = binary.NewBitwiseXor(yyDollar[1].node, yyDollar[3].node)
 
@@ -5382,10 +5885,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.CaretToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 261:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2952
+		//line php5/php5.y:3610
 		{
 			yyVAL.node = binary.NewConcat(yyDollar[1].node, yyDollar[3].node)
 
@@ -5394,10 +5899,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.DotToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 262:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2962
+		//line php5/php5.y:3622
 		{
 			yyVAL.node = binary.NewPlus(yyDollar[1].node, yyDollar[3].node)
 
@@ -5406,10 +5913,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PlusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 263:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2972
+		//line php5/php5.y:3634
 		{
 			yyVAL.node = binary.NewMinus(yyDollar[1].node, yyDollar[3].node)
 
@@ -5418,10 +5927,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.MinusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 264:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2982
+		//line php5/php5.y:3646
 		{
 			yyVAL.node = binary.NewMul(yyDollar[1].node, yyDollar[3].node)
 
@@ -5430,10 +5941,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsteriskToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 265:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:2992
+		//line php5/php5.y:3658
 		{
 			yyVAL.node = binary.NewPow(yyDollar[1].node, yyDollar[3].node)
 
@@ -5442,10 +5955,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 266:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3002
+		//line php5/php5.y:3670
 		{
 			yyVAL.node = binary.NewDiv(yyDollar[1].node, yyDollar[3].node)
 
@@ -5454,10 +5969,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SlashToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 267:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3012
+		//line php5/php5.y:3682
 		{
 			yyVAL.node = binary.NewMod(yyDollar[1].node, yyDollar[3].node)
 
@@ -5466,10 +5983,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PercentToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 268:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3022
+		//line php5/php5.y:3694
 		{
 			yyVAL.node = binary.NewShiftLeft(yyDollar[1].node, yyDollar[3].node)
 
@@ -5478,10 +5997,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SlToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 269:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3032
+		//line php5/php5.y:3706
 		{
 			yyVAL.node = binary.NewShiftRight(yyDollar[1].node, yyDollar[3].node)
 
@@ -5490,10 +6011,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SrToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 270:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3042
+		//line php5/php5.y:3718
 		{
 			yyVAL.node = expr.NewUnaryPlus(yyDollar[2].node)
 
@@ -5502,10 +6025,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.PlusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 271:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3052
+		//line php5/php5.y:3730
 		{
 			yyVAL.node = expr.NewUnaryMinus(yyDollar[2].node)
 
@@ -5514,10 +6039,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.MinusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 272:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3062
+		//line php5/php5.y:3742
 		{
 			yyVAL.node = expr.NewBooleanNot(yyDollar[2].node)
 
@@ -5526,10 +6053,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ExclamationMarkToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 273:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3072
+		//line php5/php5.y:3754
 		{
 			yyVAL.node = expr.NewBitwiseNot(yyDollar[2].node)
 
@@ -5538,10 +6067,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.TildeToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 274:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3082
+		//line php5/php5.y:3766
 		{
 			yyVAL.node = binary.NewIdentical(yyDollar[1].node, yyDollar[3].node)
 
@@ -5550,10 +6081,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsIdenticalToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 275:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3092
+		//line php5/php5.y:3778
 		{
 			yyVAL.node = binary.NewNotIdentical(yyDollar[1].node, yyDollar[3].node)
 
@@ -5562,10 +6095,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsNotIdenticalToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 276:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3102
+		//line php5/php5.y:3790
 		{
 			yyVAL.node = binary.NewEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -5574,10 +6109,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 277:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3112
+		//line php5/php5.y:3802
 		{
 			yyVAL.node = binary.NewNotEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -5586,10 +6123,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsNotEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 278:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3122
+		//line php5/php5.y:3814
 		{
 			yyVAL.node = binary.NewSmaller(yyDollar[1].node, yyDollar[3].node)
 
@@ -5598,10 +6137,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LessToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 279:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3132
+		//line php5/php5.y:3826
 		{
 			yyVAL.node = binary.NewSmallerOrEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -5610,10 +6151,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsSmallerOrEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 280:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3142
+		//line php5/php5.y:3838
 		{
 			yyVAL.node = binary.NewGreater(yyDollar[1].node, yyDollar[3].node)
 
@@ -5622,10 +6165,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.GreaterToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 281:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3152
+		//line php5/php5.y:3850
 		{
 			yyVAL.node = binary.NewGreaterOrEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -5634,10 +6179,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsGreaterOrEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 282:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3162
+		//line php5/php5.y:3862
 		{
 			yyVAL.node = expr.NewInstanceOf(yyDollar[1].node, yyDollar[3].node)
 
@@ -5646,22 +6193,28 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.InstanceofToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 283:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3172
+		//line php5/php5.y:3874
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 284:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3174
+		//line php5/php5.y:3880
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 285:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3176
+		//line php5/php5.y:3886
 		{
 			yyVAL.node = yyDollar[2].node
 
@@ -5687,10 +6240,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 286:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:3203
+		//line php5/php5.y:3915
 		{
 			yyVAL.node = expr.NewTernary(yyDollar[1].node, yyDollar[3].node, yyDollar[5].node)
 
@@ -5700,10 +6255,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.QuestionMarkToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 287:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3214
+		//line php5/php5.y:3928
 		{
 			yyVAL.node = expr.NewTernary(yyDollar[1].node, nil, yyDollar[4].node)
 
@@ -5713,16 +6270,20 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.QuestionMarkToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 288:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3225
+		//line php5/php5.y:3941
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 289:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3227
+		//line php5/php5.y:3947
 		{
 			yyVAL.node = cast.NewInt(yyDollar[2].node)
 
@@ -5731,10 +6292,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IntCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 290:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3237
+		//line php5/php5.y:3959
 		{
 			yyVAL.node = cast.NewDouble(yyDollar[2].node)
 
@@ -5743,10 +6306,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DoubleCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 291:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3247
+		//line php5/php5.y:3971
 		{
 			yyVAL.node = cast.NewString(yyDollar[2].node)
 
@@ -5755,10 +6320,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StringCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 292:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3257
+		//line php5/php5.y:3983
 		{
 			yyVAL.node = cast.NewArray(yyDollar[2].node)
 
@@ -5767,10 +6334,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ArrayCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 293:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3267
+		//line php5/php5.y:3995
 		{
 			yyVAL.node = cast.NewObject(yyDollar[2].node)
 
@@ -5779,10 +6348,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ObjectCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 294:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3277
+		//line php5/php5.y:4007
 		{
 			yyVAL.node = cast.NewBool(yyDollar[2].node)
 
@@ -5791,10 +6362,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.BoolCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 295:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3287
+		//line php5/php5.y:4019
 		{
 			yyVAL.node = cast.NewUnset(yyDollar[2].node)
 
@@ -5803,10 +6376,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UnsetCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 296:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3297
+		//line php5/php5.y:4031
 		{
 			if strings.EqualFold(yyDollar[1].token.Value, "die") {
 				yyVAL.node = expr.NewDie(nil)
@@ -5833,10 +6408,12 @@ yydefault:
 			if yyDollar[2].node != nil {
 				yylex.(*Parser).comments.AddFromChildNode(yyVAL.node, yyDollar[2].node)
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 297:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3325
+		//line php5/php5.y:4061
 		{
 			yyVAL.node = expr.NewErrorSuppress(yyDollar[2].node)
 
@@ -5845,28 +6422,36 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.AtToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 298:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3335
+		//line php5/php5.y:4073
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 299:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3337
+		//line php5/php5.y:4079
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 300:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3339
+		//line php5/php5.y:4085
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 301:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3341
+		//line php5/php5.y:4091
 		{
 			yyVAL.node = expr.NewShellExec(yyDollar[2].list)
 
@@ -5876,10 +6461,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.BackquoteToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.BackquoteToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 302:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3352
+		//line php5/php5.y:4104
 		{
 			yyVAL.node = expr.NewPrint(yyDollar[2].node)
 
@@ -5888,10 +6475,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.PrintToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 303:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3362
+		//line php5/php5.y:4116
 		{
 			yyVAL.node = expr.NewYield(nil, nil)
 
@@ -5900,10 +6489,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.YieldToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 304:
 		yyDollar = yyS[yypt-9 : yypt+1]
-		//line php5/php5.y:3372
+		//line php5/php5.y:4128
 		{
 			yyVAL.node = expr.NewClosure(yyDollar[4].list, yyDollar[6].ClosureUse, nil, yyDollar[8].list, false, yyDollar[2].token != nil, "")
 
@@ -5919,10 +6510,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[9].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 305:
 		yyDollar = yyS[yypt-10 : yypt+1]
-		//line php5/php5.y:3389
+		//line php5/php5.y:4147
 		{
 			yyVAL.node = expr.NewClosure(yyDollar[5].list, yyDollar[7].ClosureUse, nil, yyDollar[9].list, true, yyDollar[3].token != nil, "")
 
@@ -5939,10 +6532,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[8].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[10].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 306:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3410
+		//line php5/php5.y:4170
 		{
 			yyVAL.node = expr.NewYield(nil, yyDollar[2].node)
 
@@ -5951,10 +6546,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.YieldToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 307:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3420
+		//line php5/php5.y:4182
 		{
 			yyVAL.node = expr.NewYield(nil, yyDollar[2].node)
 
@@ -5963,10 +6560,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.YieldToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 308:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3430
+		//line php5/php5.y:4194
 		{
 			yyVAL.node = expr.NewYield(yyDollar[2].node, yyDollar[4].node)
 
@@ -5976,10 +6575,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.YieldToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.DoubleArrowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 309:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3441
+		//line php5/php5.y:4207
 		{
 			yyVAL.node = expr.NewYield(yyDollar[2].node, yyDollar[4].node)
 
@@ -5989,10 +6590,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.YieldToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.DoubleArrowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 310:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3455
+		//line php5/php5.y:4223
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6002,10 +6605,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 311:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3466
+		//line php5/php5.y:4236
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6015,10 +6620,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 312:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3477
+		//line php5/php5.y:4249
 		{
 			str := scalar.NewString(yyDollar[1].token.Value)
 			yyVAL.node = expr.NewArrayDimFetch(str, yyDollar[3].node)
@@ -6030,10 +6637,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 313:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3490
+		//line php5/php5.y:4264
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6043,10 +6652,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 314:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3504
+		//line php5/php5.y:4280
 		{
 			yyVAL.node = expr.NewArray(yyDollar[3].list)
 
@@ -6057,10 +6668,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ArrayToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 315:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3516
+		//line php5/php5.y:4294
 		{
 			yyVAL.node = expr.NewShortArray(yyDollar[2].list)
 
@@ -6070,30 +6683,36 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 316:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3530
+		//line php5/php5.y:4310
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 317:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:3535
+		//line php5/php5.y:4317
 		{
 			yyVAL.ClosureUse = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 318:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3537
+		//line php5/php5.y:4323
 		{
 			yyVAL.ClosureUse = expr.NewClosureUse(yyDollar[3].list)
 
 			yylex.(*Parser).positions.AddPosition(yyVAL.ClosureUse, yylex.(*Parser).positionBuilder.NewTokensPosition(yyDollar[1].token, yyDollar[4].token))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 319:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3546
+		//line php5/php5.y:4334
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[3].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -6106,10 +6725,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[3].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 320:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3560
+		//line php5/php5.y:4350
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[4].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -6124,10 +6745,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(reference, yyDollar[3].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[4].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 321:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3576
+		//line php5/php5.y:4368
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -6139,10 +6762,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 322:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3589
+		//line php5/php5.y:4383
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[2].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -6157,10 +6782,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(reference, yyDollar[1].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[2].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 323:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3608
+		//line php5/php5.y:4404
 		{
 			name := name.NewName(yyDollar[1].list)
 			yyVAL.node = expr.NewFunctionCall(name, yyDollar[2].node.(*node.ArgumentList))
@@ -6168,10 +6795,12 @@ yydefault:
 			// save position
 			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodesPosition(name, yyDollar[2].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 324:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3617
+		//line php5/php5.y:4415
 		{
 			funcName := name.NewRelative(yyDollar[3].list)
 			yyVAL.node = expr.NewFunctionCall(funcName, yyDollar[4].node.(*node.ArgumentList))
@@ -6183,10 +6812,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(funcName, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(funcName, yyDollar[2].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 325:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3630
+		//line php5/php5.y:4430
 		{
 			funcName := name.NewFullyQualified(yyDollar[2].list)
 			yyVAL.node = expr.NewFunctionCall(funcName, yyDollar[3].node.(*node.ArgumentList))
@@ -6197,10 +6828,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(funcName, yyDollar[1].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 326:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3642
+		//line php5/php5.y:4444
 		{
 			yyVAL.node = expr.NewStaticCall(yyDollar[1].node, yyDollar[3].node, yyDollar[4].node.(*node.ArgumentList))
 
@@ -6209,10 +6842,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 327:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3652
+		//line php5/php5.y:4456
 		{
 			yyVAL.node = expr.NewStaticCall(yyDollar[1].node, yyDollar[3].node, yyDollar[4].node.(*node.ArgumentList))
 
@@ -6221,10 +6856,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 328:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3662
+		//line php5/php5.y:4468
 		{
 			yyVAL.node = expr.NewStaticCall(yyDollar[1].node, yyDollar[3].node, yyDollar[4].node.(*node.ArgumentList))
 
@@ -6233,10 +6870,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 329:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3672
+		//line php5/php5.y:4480
 		{
 			yyVAL.node = expr.NewStaticCall(yyDollar[1].node, yyDollar[3].node, yyDollar[4].node.(*node.ArgumentList))
 
@@ -6245,19 +6884,23 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 330:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3682
+		//line php5/php5.y:4492
 		{
 			yyVAL.node = expr.NewFunctionCall(yyDollar[1].node, yyDollar[2].node.(*node.ArgumentList))
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodesPosition(yyDollar[1].node, yyDollar[2].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 331:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3692
+		//line php5/php5.y:4504
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -6266,19 +6909,23 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StaticToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 332:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3702
+		//line php5/php5.y:4516
 		{
 			yyVAL.node = name.NewName(yyDollar[1].list)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 333:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3709
+		//line php5/php5.y:4525
 		{
 			yyVAL.node = name.NewRelative(yyDollar[3].list)
 
@@ -6288,10 +6935,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 334:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3720
+		//line php5/php5.y:4538
 		{
 			yyVAL.node = name.NewFullyQualified(yyDollar[2].list)
 
@@ -6300,19 +6949,23 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 335:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3733
+		//line php5/php5.y:4553
 		{
 			yyVAL.node = name.NewName(yyDollar[1].list)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 336:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3740
+		//line php5/php5.y:4562
 		{
 			yyVAL.node = name.NewRelative(yyDollar[3].list)
 
@@ -6322,10 +6975,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 337:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3751
+		//line php5/php5.y:4575
 		{
 			yyVAL.node = name.NewFullyQualified(yyDollar[2].list)
 
@@ -6334,22 +6989,28 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 338:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3764
+		//line php5/php5.y:4590
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 339:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3766
+		//line php5/php5.y:4596
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 340:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:3771
+		//line php5/php5.y:4605
 		{
 			yyVAL.node = yyDollar[1].node
 
@@ -6383,43 +7044,55 @@ yydefault:
 					yyVAL.node = nn
 				}
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 341:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3806
+		//line php5/php5.y:4642
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 342:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3812
+		//line php5/php5.y:4652
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].list...)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 343:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:3814
+		//line php5/php5.y:4658
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 344:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3820
+		//line php5/php5.y:4668
 		{
 			yyVAL.list = yyDollar[2].list
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyDollar[2].list[0], yyDollar[1].token, comment.ObjectOperatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 345:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:3830
+		//line php5/php5.y:4680
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 346:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3832
+		//line php5/php5.y:4686
 		{
 			yyVAL.node = expr.NewExit(nil)
 
@@ -6429,49 +7102,63 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 347:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3843
+		//line php5/php5.y:4699
 		{
 			yyVAL.node = expr.NewExit(yyDollar[1].node)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 348:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:3853
+		//line php5/php5.y:4711
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 349:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3855
+		//line php5/php5.y:4717
 		{
 			yyVAL.list = []node.Node{scalar.NewEncapsedStringPart(yyDollar[1].token.Value)}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 350:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3857
+		//line php5/php5.y:4723
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 351:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:3862
+		//line php5/php5.y:4732
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 352:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3864
+		//line php5/php5.y:4738
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 353:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3869
+		//line php5/php5.y:4747
 		{
 			yyVAL.node = scalar.NewLnumber(yyDollar[1].token.Value)
 
@@ -6480,10 +7167,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.LnumberToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 354:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3879
+		//line php5/php5.y:4759
 		{
 			yyVAL.node = scalar.NewDnumber(yyDollar[1].token.Value)
 
@@ -6492,10 +7181,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DnumberToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 355:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3889
+		//line php5/php5.y:4771
 		{
 			yyVAL.node = scalar.NewString(yyDollar[1].token.Value)
 
@@ -6504,10 +7195,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ConstantEncapsedStringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 356:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3899
+		//line php5/php5.y:4783
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6516,10 +7209,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.LineToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 357:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3909
+		//line php5/php5.y:4795
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6528,10 +7223,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.FileToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 358:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3919
+		//line php5/php5.y:4807
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6540,10 +7237,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DirToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 359:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3929
+		//line php5/php5.y:4819
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6552,10 +7251,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.TraitCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 360:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3939
+		//line php5/php5.y:4831
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6564,10 +7265,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.MethodCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 361:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3949
+		//line php5/php5.y:4843
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6576,10 +7279,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.FuncCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 362:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:3959
+		//line php5/php5.y:4855
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6588,10 +7293,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 363:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3969
+		//line php5/php5.y:4867
 		{
 			encapsed := scalar.NewEncapsedStringPart(yyDollar[2].token.Value)
 			yyVAL.node = scalar.NewHeredoc(yyDollar[1].token.Value, []node.Node{encapsed})
@@ -6602,10 +7309,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StartHeredocToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 364:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:3981
+		//line php5/php5.y:4881
 		{
 			yyVAL.node = scalar.NewHeredoc(yyDollar[1].token.Value, nil)
 
@@ -6614,10 +7323,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StartHeredocToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 365:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:3994
+		//line php5/php5.y:4896
 		{
 			target := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = expr.NewClassConstFetch(yyDollar[1].node, target)
@@ -6629,28 +7340,36 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
 			yylex.(*Parser).comments.AddFromToken(target, yyDollar[3].token, comment.IdentifierToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 366:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4010
+		//line php5/php5.y:4914
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 367:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4015
+		//line php5/php5.y:4923
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 368:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4017
+		//line php5/php5.y:4929
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 369:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4019
+		//line php5/php5.y:4935
 		{
 			name := name.NewName(yyDollar[1].list)
 			yyVAL.node = expr.NewConstFetch(name)
@@ -6658,10 +7377,12 @@ yydefault:
 			// save position
 			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(name))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 370:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4028
+		//line php5/php5.y:4946
 		{
 			name := name.NewRelative(yyDollar[3].list)
 			yyVAL.node = expr.NewConstFetch(name)
@@ -6673,10 +7394,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 371:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4041
+		//line php5/php5.y:4961
 		{
 			name := name.NewFullyQualified(yyDollar[2].list)
 			yyVAL.node = expr.NewConstFetch(name)
@@ -6687,10 +7410,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 372:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4053
+		//line php5/php5.y:4975
 		{
 			yyVAL.node = expr.NewArray(yyDollar[3].list)
 
@@ -6701,10 +7426,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ArrayToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 373:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4065
+		//line php5/php5.y:4989
 		{
 			yyVAL.node = expr.NewShortArray(yyDollar[2].list)
 
@@ -6714,16 +7441,20 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 374:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4076
+		//line php5/php5.y:5002
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 375:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4078
+		//line php5/php5.y:5008
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6732,16 +7463,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ClassCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 376:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4088
+		//line php5/php5.y:5020
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 377:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4093
+		//line php5/php5.y:5029
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6751,10 +7486,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 378:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4104
+		//line php5/php5.y:5042
 		{
 			yyVAL.node = binary.NewPlus(yyDollar[1].node, yyDollar[3].node)
 
@@ -6763,10 +7500,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PlusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 379:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4114
+		//line php5/php5.y:5054
 		{
 			yyVAL.node = binary.NewMinus(yyDollar[1].node, yyDollar[3].node)
 
@@ -6775,10 +7514,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.MinusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 380:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4124
+		//line php5/php5.y:5066
 		{
 			yyVAL.node = binary.NewMul(yyDollar[1].node, yyDollar[3].node)
 
@@ -6787,10 +7528,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsteriskToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 381:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4134
+		//line php5/php5.y:5078
 		{
 			yyVAL.node = binary.NewPow(yyDollar[1].node, yyDollar[3].node)
 
@@ -6799,10 +7542,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 382:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4144
+		//line php5/php5.y:5090
 		{
 			yyVAL.node = binary.NewDiv(yyDollar[1].node, yyDollar[3].node)
 
@@ -6811,10 +7556,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SlashToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 383:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4154
+		//line php5/php5.y:5102
 		{
 			yyVAL.node = binary.NewMod(yyDollar[1].node, yyDollar[3].node)
 
@@ -6823,10 +7570,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PercentToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 384:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4164
+		//line php5/php5.y:5114
 		{
 			yyVAL.node = expr.NewBooleanNot(yyDollar[2].node)
 
@@ -6835,10 +7584,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ExclamationMarkToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 385:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4174
+		//line php5/php5.y:5126
 		{
 			yyVAL.node = expr.NewBitwiseNot(yyDollar[2].node)
 
@@ -6847,10 +7598,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.TildeToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 386:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4184
+		//line php5/php5.y:5138
 		{
 			yyVAL.node = binary.NewBitwiseOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -6859,10 +7612,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.VerticalBarToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 387:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4194
+		//line php5/php5.y:5150
 		{
 			yyVAL.node = binary.NewBitwiseAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -6871,10 +7626,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 388:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4204
+		//line php5/php5.y:5162
 		{
 			yyVAL.node = binary.NewBitwiseXor(yyDollar[1].node, yyDollar[3].node)
 
@@ -6883,10 +7640,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.CaretToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 389:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4214
+		//line php5/php5.y:5174
 		{
 			yyVAL.node = binary.NewShiftLeft(yyDollar[1].node, yyDollar[3].node)
 
@@ -6895,10 +7654,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SlToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 390:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4224
+		//line php5/php5.y:5186
 		{
 			yyVAL.node = binary.NewShiftRight(yyDollar[1].node, yyDollar[3].node)
 
@@ -6907,10 +7668,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SrToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 391:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4234
+		//line php5/php5.y:5198
 		{
 			yyVAL.node = binary.NewConcat(yyDollar[1].node, yyDollar[3].node)
 
@@ -6919,10 +7682,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.DotToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 392:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4244
+		//line php5/php5.y:5210
 		{
 			yyVAL.node = binary.NewLogicalXor(yyDollar[1].node, yyDollar[3].node)
 
@@ -6931,10 +7696,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LogicalXorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 393:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4254
+		//line php5/php5.y:5222
 		{
 			yyVAL.node = binary.NewLogicalAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -6943,10 +7710,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LogicalAndToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 394:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4264
+		//line php5/php5.y:5234
 		{
 			yyVAL.node = binary.NewLogicalOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -6955,10 +7724,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LogicalOrToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 395:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4274
+		//line php5/php5.y:5246
 		{
 			yyVAL.node = binary.NewBooleanAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -6967,10 +7738,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.BooleanAndToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 396:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4284
+		//line php5/php5.y:5258
 		{
 			yyVAL.node = binary.NewBooleanOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -6979,10 +7752,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.BooleanOrToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 397:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4294
+		//line php5/php5.y:5270
 		{
 			yyVAL.node = binary.NewIdentical(yyDollar[1].node, yyDollar[3].node)
 
@@ -6991,10 +7766,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsIdenticalToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 398:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4304
+		//line php5/php5.y:5282
 		{
 			yyVAL.node = binary.NewNotIdentical(yyDollar[1].node, yyDollar[3].node)
 
@@ -7003,10 +7780,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsNotIdenticalToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 399:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4314
+		//line php5/php5.y:5294
 		{
 			yyVAL.node = binary.NewEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -7015,10 +7794,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 400:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4324
+		//line php5/php5.y:5306
 		{
 			yyVAL.node = binary.NewNotEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -7027,10 +7808,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsNotEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 401:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4334
+		//line php5/php5.y:5318
 		{
 			yyVAL.node = binary.NewSmaller(yyDollar[1].node, yyDollar[3].node)
 
@@ -7039,10 +7822,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LessToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 402:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4344
+		//line php5/php5.y:5330
 		{
 			yyVAL.node = binary.NewGreater(yyDollar[1].node, yyDollar[3].node)
 
@@ -7051,10 +7836,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.GreaterToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 403:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4354
+		//line php5/php5.y:5342
 		{
 			yyVAL.node = binary.NewSmallerOrEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -7063,10 +7850,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsSmallerOrEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 404:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4364
+		//line php5/php5.y:5354
 		{
 			yyVAL.node = binary.NewGreaterOrEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -7075,10 +7864,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsGreaterOrEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 405:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4374
+		//line php5/php5.y:5366
 		{
 			yyVAL.node = expr.NewTernary(yyDollar[1].node, nil, yyDollar[4].node)
 
@@ -7088,10 +7879,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.QuestionMarkToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 406:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:4385
+		//line php5/php5.y:5379
 		{
 			yyVAL.node = expr.NewTernary(yyDollar[1].node, yyDollar[3].node, yyDollar[5].node)
 
@@ -7101,10 +7894,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.QuestionMarkToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 407:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4396
+		//line php5/php5.y:5392
 		{
 			yyVAL.node = expr.NewUnaryPlus(yyDollar[2].node)
 
@@ -7113,10 +7908,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.PlusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 408:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4406
+		//line php5/php5.y:5404
 		{
 			yyVAL.node = expr.NewUnaryMinus(yyDollar[2].node)
 
@@ -7125,26 +7922,32 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.MinusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 409:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4416
+		//line php5/php5.y:5416
 		{
 			yyVAL.node = yyDollar[2].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 410:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4427
+		//line php5/php5.y:5429
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 411:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4429
+		//line php5/php5.y:5435
 		{
 			name := name.NewName(yyDollar[1].list)
 			yyVAL.node = expr.NewConstFetch(name)
@@ -7152,10 +7955,12 @@ yydefault:
 			// save position
 			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(name))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 412:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4438
+		//line php5/php5.y:5446
 		{
 			name := name.NewRelative(yyDollar[3].list)
 			yyVAL.node = expr.NewConstFetch(name)
@@ -7165,10 +7970,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 413:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4449
+		//line php5/php5.y:5459
 		{
 			name := name.NewFullyQualified(yyDollar[2].list)
 			yyVAL.node = expr.NewConstFetch(name)
@@ -7179,10 +7986,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 414:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4464
+		//line php5/php5.y:5476
 		{
 			name := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.node = expr.NewVariable(name)
@@ -7193,28 +8002,36 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[1].token, comment.StringVarnameToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 415:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4476
+		//line php5/php5.y:5490
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 416:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4478
+		//line php5/php5.y:5496
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 417:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4480
+		//line php5/php5.y:5502
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 418:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4482
+		//line php5/php5.y:5508
 		{
 			yyVAL.node = scalar.NewEncapsed(yyDollar[2].list)
 
@@ -7223,10 +8040,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DoubleQuoteToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 419:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4492
+		//line php5/php5.y:5520
 		{
 			yyVAL.node = scalar.NewHeredoc(yyDollar[1].token.Value, yyDollar[2].list)
 
@@ -7235,10 +8054,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StartHeredocToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 420:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4502
+		//line php5/php5.y:5532
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -7247,16 +8068,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ClassCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 421:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:4515
+		//line php5/php5.y:5547
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 422:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4517
+		//line php5/php5.y:5553
 		{
 			yyVAL.list = yyDollar[1].list
 
@@ -7264,22 +8089,24 @@ yydefault:
 			if yyDollar[2].token != nil {
 				yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 423:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:4529
+		//line php5/php5.y:5567
 		{
 			yyVAL.token = nil
 		}
 	case 424:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4531
+		//line php5/php5.y:5571
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 425:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:4536
+		//line php5/php5.y:5578
 		{
 			arrayItem := expr.NewArrayItem(yyDollar[3].node, yyDollar[5].node)
 			yyVAL.list = append(yyDollar[1].list, arrayItem)
@@ -7290,10 +8117,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(arrayItem, yyDollar[4].token, comment.DoubleArrowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 426:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4548
+		//line php5/php5.y:5592
 		{
 			arrayItem := expr.NewArrayItem(nil, yyDollar[3].node)
 			yyVAL.list = append(yyDollar[1].list, arrayItem)
@@ -7303,10 +8132,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 427:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4559
+		//line php5/php5.y:5605
 		{
 			arrayItem := expr.NewArrayItem(yyDollar[1].node, yyDollar[3].node)
 			yyVAL.list = []node.Node{arrayItem}
@@ -7316,62 +8147,80 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(arrayItem, yyDollar[2].token, comment.DoubleArrowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 428:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4570
+		//line php5/php5.y:5618
 		{
 			arrayItem := expr.NewArrayItem(nil, yyDollar[1].node)
 			yyVAL.list = []node.Node{arrayItem}
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 429:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4581
+		//line php5/php5.y:5631
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 430:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4583
+		//line php5/php5.y:5637
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 431:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4588
+		//line php5/php5.y:5646
 		{
 			yyVAL.node = yyDollar[2].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 432:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4590
+		//line php5/php5.y:5652
 		{
 			yyVAL.node = yyDollar[2].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 433:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4596
+		//line php5/php5.y:5662
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 434:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4602
+		//line php5/php5.y:5672
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 435:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4607
+		//line php5/php5.y:5681
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 436:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:4612
+		//line php5/php5.y:5690
 		{
 			yyVAL.node = yyDollar[1].node
 
@@ -7420,28 +8269,36 @@ yydefault:
 					yyVAL.node = nn
 				}
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 437:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4662
+		//line php5/php5.y:5742
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 438:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4667
+		//line php5/php5.y:5751
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].list...)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 439:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:4669
+		//line php5/php5.y:5757
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 440:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4675
+		//line php5/php5.y:5767
 		{
 			if yyDollar[3].list != nil {
 				yyDollar[3].list[0].(*expr.MethodCall).Method = yyDollar[2].list[len(yyDollar[2].list)-1].(*expr.PropertyFetch).Property
@@ -7452,10 +8309,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyDollar[2].list[0], yyDollar[1].token, comment.ObjectOperatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 441:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4690
+		//line php5/php5.y:5784
 		{
 			fetch := expr.NewArrayDimFetch(nil, yyDollar[3].node)
 			yyVAL.list = append(yyDollar[1].list, fetch)
@@ -7466,10 +8325,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 442:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4702
+		//line php5/php5.y:5798
 		{
 			fetch := expr.NewArrayDimFetch(nil, yyDollar[3].node)
 			yyVAL.list = []node.Node{yyDollar[1].node, fetch}
@@ -7480,43 +8341,55 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 443:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4717
+		//line php5/php5.y:5815
 		{
 			yyVAL.node = expr.NewMethodCall(nil, nil, yyDollar[1].node.(*node.ArgumentList))
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 444:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4727
+		//line php5/php5.y:5827
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 445:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4729
+		//line php5/php5.y:5833
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 446:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:4731
+		//line php5/php5.y:5839
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 447:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4736
+		//line php5/php5.y:5848
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 448:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4738
+		//line php5/php5.y:5854
 		{
 			yyDollar[1].simpleIndirectReference.last.SetVarName(yyDollar[2].node)
 
@@ -7525,10 +8398,12 @@ yydefault:
 			}
 
 			yyVAL.node = yyDollar[1].simpleIndirectReference.all[0]
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 449:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4751
+		//line php5/php5.y:5869
 		{
 			yyVAL.node = expr.NewStaticPropertyFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -7537,10 +8412,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 450:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4761
+		//line php5/php5.y:5881
 		{
 			yyVAL.node = expr.NewStaticPropertyFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -7549,16 +8426,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 451:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4775
+		//line php5/php5.y:5896
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 452:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4780
+		//line php5/php5.y:5905
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -7568,10 +8449,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 453:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4791
+		//line php5/php5.y:5918
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -7581,34 +8464,44 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 454:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4804
+		//line php5/php5.y:5934
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 455:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4805
+		//line php5/php5.y:5940
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 456:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4806
+		//line php5/php5.y:5946
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 457:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4812
+		//line php5/php5.y:5956
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 458:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4814
+		//line php5/php5.y:5962
 		{
 			yyDollar[1].simpleIndirectReference.last.SetVarName(yyDollar[2].node)
 
@@ -7617,16 +8510,20 @@ yydefault:
 			}
 
 			yyVAL.node = yyDollar[1].simpleIndirectReference.all[0]
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 459:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4824
+		//line php5/php5.y:5974
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 460:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4829
+		//line php5/php5.y:5983
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -7636,10 +8533,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 461:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4840
+		//line php5/php5.y:5996
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -7649,16 +8548,20 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 462:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4851
+		//line php5/php5.y:6009
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 463:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4857
+		//line php5/php5.y:6019
 		{
 			name := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			yyVAL.node = expr.NewVariable(name)
@@ -7669,10 +8572,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 464:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4869
+		//line php5/php5.y:6033
 		{
 			yyVAL.node = expr.NewVariable(yyDollar[3].node)
 
@@ -7683,38 +8588,48 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DollarToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 465:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:4884
+		//line php5/php5.y:6050
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 466:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4886
+		//line php5/php5.y:6056
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 467:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4892
+		//line php5/php5.y:6066
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 468:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4894
+		//line php5/php5.y:6072
 		{
 			fetch := expr.NewPropertyFetch(nil, yyDollar[1].node)
 			yyVAL.list = []node.Node{fetch}
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(fetch, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 469:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4905
+		//line php5/php5.y:6085
 		{
 			fetch := expr.NewArrayDimFetch(nil, yyDollar[3].node)
 			yyVAL.list = append(yyDollar[1].list, fetch)
@@ -7725,10 +8640,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 470:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:4917
+		//line php5/php5.y:6099
 		{
 			fetch := expr.NewArrayDimFetch(nil, yyDollar[3].node)
 			yyVAL.list = append(yyDollar[1].list, fetch)
@@ -7739,20 +8656,24 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 471:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4929
+		//line php5/php5.y:6113
 		{
 			fetch := expr.NewPropertyFetch(nil, yyDollar[1].node)
 			yyVAL.list = []node.Node{fetch}
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(fetch, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 472:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4940
+		//line php5/php5.y:6126
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -7761,10 +8682,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 473:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4950
+		//line php5/php5.y:6138
 		{
 			yyVAL.node = yyDollar[2].node
 
@@ -7774,10 +8697,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 474:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:4964
+		//line php5/php5.y:6154
 		{
 			n := expr.NewVariable(nil)
 			yyVAL.simpleIndirectReference = simpleIndirectReference{[]*expr.Variable{n}, n}
@@ -7787,10 +8712,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(n, yyDollar[1].token, comment.DollarToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 475:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:4975
+		//line php5/php5.y:6167
 		{
 			n := expr.NewVariable(nil)
 
@@ -7804,38 +8731,46 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(n, yyDollar[2].token, comment.DollarToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 476:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:4993
+		//line php5/php5.y:6187
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 477:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5000
+		//line php5/php5.y:6196
 		{
 			if yyDollar[1].node == nil {
 				yyVAL.list = []node.Node{}
 			} else {
 				yyVAL.list = []node.Node{yyDollar[1].node}
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 478:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5012
+		//line php5/php5.y:6210
 		{
 			yyVAL.node = expr.NewArrayItem(nil, yyDollar[1].node)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 479:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:5019
+		//line php5/php5.y:6219
 		{
 			item := expr.NewList(yyDollar[3].list)
 			yyVAL.node = expr.NewArrayItem(nil, item)
@@ -7848,22 +8783,28 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(item, yyDollar[1].token, comment.ListToken)
 			yylex.(*Parser).comments.AddFromToken(item, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(item, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 480:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:5033
+		//line php5/php5.y:6235
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 481:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php5/php5.y:5039
+		//line php5/php5.y:6245
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 482:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:5041
+		//line php5/php5.y:6251
 		{
 			yyVAL.list = yyDollar[1].list
 
@@ -7871,10 +8812,12 @@ yydefault:
 			if yyDollar[2].token != nil {
 				yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 483:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php5/php5.y:5053
+		//line php5/php5.y:6265
 		{
 			arrayItem := expr.NewArrayItem(yyDollar[3].node, yyDollar[5].node)
 			yyVAL.list = append(yyDollar[1].list, arrayItem)
@@ -7885,10 +8828,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(arrayItem, yyDollar[4].token, comment.DoubleArrowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 484:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5065
+		//line php5/php5.y:6279
 		{
 			arrayItem := expr.NewArrayItem(nil, yyDollar[3].node)
 			yyVAL.list = append(yyDollar[1].list, arrayItem)
@@ -7898,10 +8843,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 485:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5076
+		//line php5/php5.y:6292
 		{
 			arrayItem := expr.NewArrayItem(yyDollar[1].node, yyDollar[3].node)
 			yyVAL.list = []node.Node{arrayItem}
@@ -7911,20 +8858,24 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(arrayItem, yyDollar[2].token, comment.DoubleArrowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 486:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5087
+		//line php5/php5.y:6305
 		{
 			arrayItem := expr.NewArrayItem(nil, yyDollar[1].node)
 			yyVAL.list = []node.Node{arrayItem}
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 487:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php5/php5.y:5095
+		//line php5/php5.y:6315
 		{
 			reference := expr.NewReference(yyDollar[6].node)
 			arrayItem := expr.NewArrayItem(yyDollar[3].node, reference)
@@ -7938,10 +8889,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(arrayItem, yyDollar[4].token, comment.DoubleArrowToken)
 			yylex.(*Parser).comments.AddFromToken(reference, yyDollar[5].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 488:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:5110
+		//line php5/php5.y:6332
 		{
 			reference := expr.NewReference(yyDollar[4].node)
 			arrayItem := expr.NewArrayItem(nil, reference)
@@ -7954,10 +8907,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
 			yylex.(*Parser).comments.AddFromToken(reference, yyDollar[3].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 489:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:5124
+		//line php5/php5.y:6348
 		{
 			reference := expr.NewReference(yyDollar[4].node)
 			arrayItem := expr.NewArrayItem(yyDollar[1].node, reference)
@@ -7970,10 +8925,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(arrayItem, yyDollar[2].token, comment.DoubleArrowToken)
 			yylex.(*Parser).comments.AddFromToken(reference, yyDollar[3].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 490:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:5138
+		//line php5/php5.y:6364
 		{
 			reference := expr.NewReference(yyDollar[2].node)
 			arrayItem := expr.NewArrayItem(nil, reference)
@@ -7985,16 +8942,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(reference, yyDollar[1].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 491:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:5154
+		//line php5/php5.y:6382
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 492:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:5156
+		//line php5/php5.y:6388
 		{
 			encapsed := scalar.NewEncapsedStringPart(yyDollar[2].token.Value)
 			yyVAL.list = append(yyDollar[1].list, encapsed)
@@ -8004,16 +8965,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(encapsed, yyDollar[2].token, comment.EncapsedAndWhitespaceToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 493:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5167
+		//line php5/php5.y:6401
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 494:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:5169
+		//line php5/php5.y:6407
 		{
 			encapsed := scalar.NewEncapsedStringPart(yyDollar[1].token.Value)
 			yyVAL.list = []node.Node{encapsed, yyDollar[2].node}
@@ -8023,10 +8988,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(encapsed, yyDollar[1].token, comment.EncapsedAndWhitespaceToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 495:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5183
+		//line php5/php5.y:6423
 		{
 			name := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			yyVAL.node = expr.NewVariable(name)
@@ -8037,10 +9004,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 496:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:5195
+		//line php5/php5.y:6437
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -8055,10 +9024,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 497:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5211
+		//line php5/php5.y:6455
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -8075,10 +9046,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ObjectOperatorToken)
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[3].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 498:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5229
+		//line php5/php5.y:6475
 		{
 			yyVAL.node = expr.NewVariable(yyDollar[2].node)
 
@@ -8088,10 +9061,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DollarOpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 499:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5240
+		//line php5/php5.y:6488
 		{
 			name := node.NewIdentifier(yyDollar[2].token.Value)
 			yyVAL.node = expr.NewVariable(name)
@@ -8104,10 +9079,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DollarOpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[2].token, comment.StringVarnameToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 500:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php5/php5.y:5254
+		//line php5/php5.y:6504
 		{
 			identifier := node.NewIdentifier(yyDollar[2].token.Value)
 			variable := expr.NewVariable(identifier)
@@ -8124,16 +9101,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.CloseSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 501:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5272
+		//line php5/php5.y:6524
 		{
 			yyVAL.node = yyDollar[2].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 502:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5279
+		//line php5/php5.y:6533
 		{
 			yyVAL.node = scalar.NewString(yyDollar[1].token.Value)
 
@@ -8142,10 +9123,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 503:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5289
+		//line php5/php5.y:6545
 		{
 			// TODO: add option to handle 64 bit integer
 			if _, err := strconv.Atoi(yyDollar[1].token.Value); err == nil {
@@ -8159,10 +9142,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NumStringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 504:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5304
+		//line php5/php5.y:6562
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			yyVAL.node = expr.NewVariable(identifier)
@@ -8173,10 +9158,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 505:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:5319
+		//line php5/php5.y:6579
 		{
 			yyVAL.node = expr.NewIsset(yyDollar[3].list)
 
@@ -8187,10 +9174,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IssetToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 506:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:5331
+		//line php5/php5.y:6593
 		{
 			yyVAL.node = expr.NewEmpty(yyDollar[3].node)
 
@@ -8201,10 +9190,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.EmptyToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 507:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:5343
+		//line php5/php5.y:6607
 		{
 			yyVAL.node = expr.NewEmpty(yyDollar[3].node)
 
@@ -8215,10 +9206,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.EmptyToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 508:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:5355
+		//line php5/php5.y:6621
 		{
 			yyVAL.node = expr.NewInclude(yyDollar[2].node)
 
@@ -8227,10 +9220,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IncludeToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 509:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:5365
+		//line php5/php5.y:6633
 		{
 			yyVAL.node = expr.NewIncludeOnce(yyDollar[2].node)
 
@@ -8239,10 +9234,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IncludeOnceToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 510:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php5/php5.y:5375
+		//line php5/php5.y:6645
 		{
 			yyVAL.node = expr.NewEval(yyDollar[3].node)
 
@@ -8253,10 +9250,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.EvalToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 511:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:5387
+		//line php5/php5.y:6659
 		{
 			yyVAL.node = expr.NewRequire(yyDollar[2].node)
 
@@ -8265,10 +9264,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.RequireToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 512:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php5/php5.y:5397
+		//line php5/php5.y:6671
 		{
 			yyVAL.node = expr.NewRequireOnce(yyDollar[2].node)
 
@@ -8277,37 +9278,47 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.RequireOnceToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 513:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5410
+		//line php5/php5.y:6686
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 514:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5412
+		//line php5/php5.y:6692
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 515:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5422
+		//line php5/php5.y:6704
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 516:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php5/php5.y:5424
+		//line php5/php5.y:6710
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 517:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5429
+		//line php5/php5.y:6719
 		{
 			target := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = expr.NewClassConstFetch(yyDollar[1].node, target)
@@ -8318,10 +9329,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 518:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5441
+		//line php5/php5.y:6733
 		{
 			target := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = expr.NewClassConstFetch(yyDollar[1].node, target)
@@ -8332,10 +9345,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 519:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5456
+		//line php5/php5.y:6750
 		{
 			target := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = expr.NewClassConstFetch(yyDollar[1].node, target)
@@ -8346,10 +9361,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 520:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php5/php5.y:5471
+		//line php5/php5.y:6767
 		{
 			target := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = expr.NewClassConstFetch(yyDollar[1].node, target)
@@ -8360,6 +9377,8 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	}
 	goto yystack /* stack new state and value */
diff --git a/php5/php5.y b/php5/php5.y
index 1ba299b..0ab1482 100644
--- a/php5/php5.y
+++ b/php5/php5.y
@@ -281,6 +281,8 @@ start:
             {
                 yylex.(*Parser).rootNode = node.NewRoot($1)
                 yylex.(*Parser).positions.AddPosition(yylex.(*Parser).rootNode, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -290,8 +292,15 @@ top_statement_list:
                 if $2 != nil {
                     $$ = append($1, $2)
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
+    |   /* empty */
+            {
+                $$ = []node.Node{}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
-    |   /* empty */                                     { $$ = []node.Node{} }
 ;
 
 namespace_name:
@@ -305,6 +314,8 @@ namespace_name:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(namePart, $1, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   namespace_name T_NS_SEPARATOR T_STRING
             {
@@ -317,6 +328,8 @@ namespace_name:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.NsSeparatorToken)
                 yylex.(*Parser).comments.AddFromToken(namePart, $3, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -325,13 +338,27 @@ top_statement:
             {
                 // error
                 $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   statement
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   function_declaration_statement
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   class_declaration_statement
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_HALT_COMPILER '(' ')' ';'
             {
                 $$ = stmt.NewHaltCompiler()
@@ -344,6 +371,8 @@ top_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE namespace_name ';'
             {
@@ -357,6 +386,8 @@ top_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE namespace_name '{' top_statement_list '}'
             {
@@ -371,6 +402,8 @@ top_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE '{' top_statement_list '}'
             {
@@ -383,6 +416,8 @@ top_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_USE use_declarations ';'
             {
@@ -394,6 +429,8 @@ top_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UseToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_USE T_FUNCTION use_function_declarations ';'
             {
@@ -408,6 +445,8 @@ top_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UseToken)
                 yylex.(*Parser).comments.AddFromToken(useType, $2, comment.UseToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_USE T_CONST use_const_declarations ';'
             {
@@ -422,6 +461,8 @@ top_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UseToken)
                 yylex.(*Parser).comments.AddFromToken(useType, $2, comment.UseToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   constant_declaration ';'
             {
@@ -432,6 +473,8 @@ top_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -442,9 +485,15 @@ use_declarations:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   use_declaration
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 use_declaration:
@@ -456,6 +505,8 @@ use_declaration:
                 // save position
                 yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   namespace_name T_AS T_STRING
             {
@@ -471,6 +522,8 @@ use_declaration:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken(alias, $3, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name
             {
@@ -483,6 +536,8 @@ use_declaration:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name T_AS T_STRING
             {
@@ -499,6 +554,8 @@ use_declaration:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -509,9 +566,15 @@ use_function_declarations:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   use_function_declaration
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 use_function_declaration:
@@ -523,6 +586,8 @@ use_function_declaration:
                 // save position
                 yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   namespace_name T_AS T_STRING
             {
@@ -538,6 +603,8 @@ use_function_declaration:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken(alias, $3, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name
             {
@@ -550,6 +617,8 @@ use_function_declaration:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name T_AS T_STRING
             {
@@ -566,6 +635,8 @@ use_function_declaration:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -576,9 +647,15 @@ use_const_declarations:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   use_const_declaration
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 use_const_declaration:
@@ -590,6 +667,8 @@ use_const_declaration:
                 // save position
                 yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   namespace_name T_AS T_STRING
             {
@@ -605,6 +684,8 @@ use_const_declaration:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken(alias, $3, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name
             {
@@ -617,6 +698,8 @@ use_const_declaration:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name T_AS T_STRING
             {
@@ -633,6 +716,8 @@ use_const_declaration:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -654,6 +739,8 @@ constant_declaration:
                 yylex.(*Parser).comments.AddFromToken(lastNode(constList.Consts), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(name, $3, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken(constant, $4, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CONST T_STRING '=' static_scalar
             {
@@ -671,6 +758,8 @@ constant_declaration:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ConstToken)
                 yylex.(*Parser).comments.AddFromToken(name, $2, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken(constant, $3, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -680,9 +769,15 @@ inner_statement_list:
                 if $2 != nil {
                     $$ = append($1, $2)
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
@@ -691,13 +786,27 @@ inner_statement:
             {
                 // error
                 $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   statement
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   function_declaration_statement
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   class_declaration_statement
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_HALT_COMPILER '(' ')' ';'
             {
                 $$ = stmt.NewHaltCompiler()
@@ -710,13 +819,19 @@ inner_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 statement:
         unticked_statement
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_STRING ':'
             {
                 label := node.NewIdentifier($1.Value)
@@ -729,6 +844,8 @@ statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(label, $1, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -743,6 +860,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_IF parenthesis_expr statement elseif_list else_single
             {
@@ -759,6 +878,8 @@ unticked_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IfToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_IF parenthesis_expr ':' inner_statement_list new_elseif_list new_else_single T_ENDIF ';'
             {
@@ -774,6 +895,8 @@ unticked_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.EndifToken)
                 yylex.(*Parser).comments.AddFromToken($$, $8, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_WHILE parenthesis_expr while_statement
             {
@@ -791,6 +914,8 @@ unticked_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.WhileToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DO statement T_WHILE parenthesis_expr ';'
             {
@@ -803,6 +928,8 @@ unticked_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DoToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.WhileToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FOR '(' for_expr ';' for_expr ';' for_expr ')' for_statement
             {
@@ -828,6 +955,8 @@ unticked_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.ForInitSemicolonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.ForCondSemicolonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $8, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_SWITCH parenthesis_expr switch_case_list
             {
@@ -847,6 +976,8 @@ unticked_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.SwitchToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_BREAK ';'
             {
@@ -858,6 +989,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.BreakToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_BREAK expr ';'
             {
@@ -869,6 +1002,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.BreakToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CONTINUE ';'
             {
@@ -880,6 +1015,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ContinueToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CONTINUE expr ';'
             {
@@ -891,6 +1028,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ContinueToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_RETURN ';'
             {
@@ -902,6 +1041,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ReturnToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_RETURN expr_without_variable ';'
             {
@@ -913,6 +1054,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ReturnToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_RETURN variable ';'
             {
@@ -924,6 +1067,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ReturnToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   yield_expr ';'
             {
@@ -934,6 +1079,8 @@ unticked_statement:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_GLOBAL global_var_list ';'
             {
@@ -945,6 +1092,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.GlobalToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_STATIC static_var_list ';'
             {
@@ -956,6 +1105,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StaticToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_ECHO echo_expr_list ';'
             {
@@ -967,6 +1118,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.EchoToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_INLINE_HTML
             {
@@ -977,6 +1130,8 @@ unticked_statement:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.InlineHTMLToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr ';'
             {
@@ -987,6 +1142,8 @@ unticked_statement:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_UNSET '(' unset_variables ')' ';'
             {
@@ -1000,6 +1157,8 @@ unticked_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FOREACH '(' variable T_AS foreach_variable foreach_optional_arg ')' foreach_statement
             {
@@ -1035,6 +1194,8 @@ unticked_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FOREACH '(' expr_without_variable T_AS foreach_variable foreach_optional_arg ')' foreach_statement
             {
@@ -1070,6 +1231,8 @@ unticked_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DECLARE '(' declare_list ')' declare_statement
             {
@@ -1082,6 +1245,8 @@ unticked_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DeclareToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ';'
             {
@@ -1092,6 +1257,8 @@ unticked_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_TRY '{' inner_statement_list '}' catch_statement finally_statement
             {
@@ -1108,6 +1275,8 @@ unticked_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.TryToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_THROW expr ';'
             {
@@ -1119,6 +1288,8 @@ unticked_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ThrowToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_GOTO T_STRING ';'
             {
@@ -1133,12 +1304,18 @@ unticked_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.GotoToken)
                 yylex.(*Parser).comments.AddFromToken(label, $2, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 catch_statement:
         /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_CATCH '(' fully_qualified_class_name T_VARIABLE ')' '{' inner_statement_list '}' additional_catches
             {
                 identifier := node.NewIdentifier(strings.TrimLeftFunc($4.Value, isDollar))
@@ -1158,11 +1335,18 @@ catch_statement:
                 yylex.(*Parser).comments.AddFromToken(catch, $5, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken(catch, $6, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken(catch, $8, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
+;
 
 finally_statement:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_FINALLY '{' inner_statement_list '}'
             {
                 $$ = stmt.NewFinally($3)
@@ -1174,21 +1358,39 @@ finally_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.FinallyToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 additional_catches:
         non_empty_additional_catches
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 non_empty_additional_catches:
         additional_catch
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_additional_catches additional_catch
-            { $$ = append($1, $2) }
+            {
+                $$ = append($1, $2) 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 additional_catch:
@@ -1210,48 +1412,76 @@ additional_catch:
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $8, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 unset_variables:
         unset_variable
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   unset_variables ',' unset_variable
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 unset_variable:
         variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 function_declaration_statement:
         unticked_function_declaration_statement
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 class_declaration_statement:
         unticked_class_declaration_statement
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 is_reference:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+            }
     |   '&'
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 is_variadic:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+            }
     |   T_ELLIPSIS
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 unticked_function_declaration_statement:
@@ -1274,6 +1504,8 @@ unticked_function_declaration_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $9, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1303,6 +1535,8 @@ unticked_class_declaration_statement:
                 yylex.(*Parser).comments.AddFromToken(name, $2, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   interface_entry T_STRING interface_extends_list '{' class_statement_list '}'
             {
@@ -1317,6 +1551,8 @@ unticked_class_declaration_statement:
                 yylex.(*Parser).comments.AddFromToken(name, $2, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1331,6 +1567,8 @@ class_entry_type:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ClassToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_ABSTRACT T_CLASS
             {
@@ -1344,6 +1582,8 @@ class_entry_type:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(classModifier, $1, comment.AbstractToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ClassToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_TRAIT
             {
@@ -1354,6 +1594,8 @@ class_entry_type:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.TraitToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FINAL T_CLASS
             {
@@ -1367,12 +1609,18 @@ class_entry_type:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(classModifier, $1, comment.FinalToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ClassToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 extends_from:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_EXTENDS fully_qualified_class_name
             {
                 $$ = stmt.NewClassExtends($2);
@@ -1382,17 +1630,25 @@ extends_from:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ExtendsToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 interface_entry:
         T_INTERFACE
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 interface_extends_list:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_EXTENDS interface_list
             {
                 $$ = stmt.NewInterfaceExtends($2);
@@ -1402,12 +1658,18 @@ interface_extends_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ExtendsToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 implements_list:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_IMPLEMENTS interface_list
             {
                 $$ = stmt.NewClassImplements($2);
@@ -1417,36 +1679,54 @@ implements_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ImplementsToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 interface_list:
         fully_qualified_class_name
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   interface_list ',' fully_qualified_class_name
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 foreach_optional_arg:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_DOUBLE_ARROW foreach_variable
             {
                 $$ = $2
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DoubleArrowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 foreach_variable:
         variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '&' variable
             {
                 $$ = expr.NewReference($2)
@@ -1456,6 +1736,8 @@ foreach_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_LIST '(' assignment_list ')'
             {
@@ -1468,6 +1750,8 @@ foreach_variable:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ListToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1478,6 +1762,8 @@ for_statement:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ':' inner_statement_list T_ENDFOR ';'
             {
@@ -1492,6 +1778,8 @@ for_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.EndforToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1502,6 +1790,8 @@ foreach_statement:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ':' inner_statement_list T_ENDFOREACH ';'
             {
@@ -1516,13 +1806,19 @@ foreach_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.EndforeachToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 declare_statement:
         statement
-            { $$ = $1; }
+            {
+                $$ = $1; 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   ':' inner_statement_list T_ENDDECLARE ';'
             {
                 $$ = stmt.NewStmtList($2)
@@ -1534,6 +1830,8 @@ declare_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.EnddeclareToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1552,6 +1850,8 @@ declare_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(name, $1, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken(constant, $2, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   declare_list ',' T_STRING '=' static_scalar
             {
@@ -1567,6 +1867,8 @@ declare_list:
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(name, $3, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken(constant, $4, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1584,6 +1886,8 @@ switch_case_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(caseList, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken(caseList, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '{' ';' case_list '}'
             {
@@ -1598,6 +1902,8 @@ switch_case_list:
                 yylex.(*Parser).comments.AddFromToken(caseList, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken(caseList, $2, comment.SemiColonToken)
                 yylex.(*Parser).comments.AddFromToken(caseList, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ':' case_list T_ENDSWITCH ';'
             {
@@ -1612,6 +1918,8 @@ switch_case_list:
                 yylex.(*Parser).comments.AddFromToken(caseList, $1, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken(caseList, $3, comment.EndswitchToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ':' ';' case_list T_ENDSWITCH ';'
             {
@@ -1628,13 +1936,19 @@ switch_case_list:
                 yylex.(*Parser).comments.AddFromToken(caseList, $2, comment.SemiColonToken)
                 yylex.(*Parser).comments.AddFromToken(caseList, $4, comment.EndswitchToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 case_list:
         /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   case_list T_CASE expr case_separator inner_statement_list
             {
                 _case := stmt.NewCase($3, $5)
@@ -1646,6 +1960,8 @@ case_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(_case, $2, comment.CaseToken)
                 yylex.(*Parser).comments.AddFromToken(_case, $4, comment.CaseSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   case_list T_DEFAULT case_separator inner_statement_list
             {
@@ -1658,15 +1974,21 @@ case_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(_default, $2, comment.DefaultToken)
                 yylex.(*Parser).comments.AddFromToken(_default, $3, comment.CaseSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 case_separator:
         ':'
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
     |   ';'
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 
@@ -1677,6 +1999,8 @@ while_statement:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ':' inner_statement_list T_ENDWHILE ';'
             {
@@ -1691,6 +2015,8 @@ while_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.EndwhileToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1698,7 +2024,11 @@ while_statement:
 
 elseif_list:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   elseif_list T_ELSEIF parenthesis_expr statement
             {
                 _elseIf := stmt.NewElseIf($3, $4)
@@ -1709,13 +2039,19 @@ elseif_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(_elseIf, $2, comment.ElseifToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 new_elseif_list:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   new_elseif_list T_ELSEIF parenthesis_expr ':' inner_statement_list
             {
                 stmts := stmt.NewStmtList($5)
@@ -1729,13 +2065,19 @@ new_elseif_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(_elseIf, $2, comment.ElseifToken)
                 yylex.(*Parser).comments.AddFromToken(_elseIf, $4, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 else_single:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_ELSE statement
             {
                 $$ = stmt.NewElse($2)
@@ -1745,13 +2087,19 @@ else_single:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ElseToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 new_else_single:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_ELSE ':' inner_statement_list
             {
                 stmts := stmt.NewStmtList($3)
@@ -1764,26 +2112,42 @@ new_else_single:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ElseToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 parameter_list:
         non_empty_parameter_list
-            { $$ = $1; }
+            {
+                $$ = $1; 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 non_empty_parameter_list:
         parameter
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_parameter_list ',' parameter
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1815,6 +2179,8 @@ parameter:
                     yylex.(*Parser).comments.AddFromToken($$, $3, comment.EllipsisToken)
                 }
                 yylex.(*Parser).comments.AddFromToken(variable, $4, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   optional_class_type is_reference is_variadic T_VARIABLE '=' static_scalar
             {
@@ -1844,13 +2210,19 @@ parameter:
                 }
                 yylex.(*Parser).comments.AddFromToken(variable, $4, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 optional_class_type:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_ARRAY
             {
                 $$ = node.NewIdentifier($1.Value)
@@ -1860,6 +2232,8 @@ optional_class_type:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ArrayToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CALLABLE
             {
@@ -1870,9 +2244,15 @@ optional_class_type:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.CallableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   fully_qualified_class_name
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
@@ -1887,6 +2267,8 @@ function_call_parameter_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '(' non_empty_function_call_parameter_list ')'
             {
@@ -1898,6 +2280,8 @@ function_call_parameter_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '(' yield_expr ')'
             {
@@ -1911,19 +2295,27 @@ function_call_parameter_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 non_empty_function_call_parameter_list:
         function_call_parameter
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_function_call_parameter_list ',' function_call_parameter
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1934,6 +2326,8 @@ function_call_parameter:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable
             {
@@ -1941,6 +2335,8 @@ function_call_parameter:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '&' w_variable
             {
@@ -1951,6 +2347,8 @@ function_call_parameter:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_ELLIPSIS expr
             {
@@ -1961,6 +2359,8 @@ function_call_parameter:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.EllipsisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1971,9 +2371,15 @@ global_var_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   global_var
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
@@ -1989,6 +2395,8 @@ global_var:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '$' r_variable
             {
@@ -1999,6 +2407,8 @@ global_var:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DollarToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '$' '{' expr '}'
             {
@@ -2011,6 +2421,8 @@ global_var:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DollarToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2031,6 +2443,8 @@ static_var_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(variable, $3, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_var_list ',' T_VARIABLE '=' static_scalar
             {
@@ -2048,6 +2462,8 @@ static_var_list:
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(variable, $3, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken(staticVar, $4, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE
             {
@@ -2063,6 +2479,8 @@ static_var_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE '=' static_scalar
             {
@@ -2079,15 +2497,25 @@ static_var_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken(staticVar, $2, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 
 class_statement_list:
         class_statement_list class_statement
-            { $$ = append($1, $2) }
+            {
+                $$ = append($1, $2) 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
@@ -2101,6 +2529,8 @@ class_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   class_constant_declaration ';'
             {
@@ -2111,10 +2541,14 @@ class_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   trait_use_statement
             {
                 $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   method_modifiers function is_reference T_STRING '(' parameter_list ')' method_body
             {
@@ -2137,6 +2571,8 @@ class_statement:
                 yylex.(*Parser).comments.AddFromToken(name, $4, comment.IdentifierToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2157,18 +2593,26 @@ trait_use_statement:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UseToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 trait_list:
         fully_qualified_class_name
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   trait_list ',' fully_qualified_class_name
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2182,6 +2626,8 @@ trait_adaptations:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.SemiColonToken)
 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '{' trait_adaptation_list '}'
             {
@@ -2192,21 +2638,39 @@ trait_adaptations:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 trait_adaptation_list:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_trait_adaptation_list
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 non_empty_trait_adaptation_list:
         trait_adaptation_statement
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_trait_adaptation_list trait_adaptation_statement
-            { $$ = append($1, $2) }
+            {
+                $$ = append($1, $2) 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 trait_adaptation_statement:
@@ -2216,6 +2680,8 @@ trait_adaptation_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   trait_alias ';'
             {
@@ -2223,6 +2689,8 @@ trait_adaptation_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2236,18 +2704,26 @@ trait_precedence:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.InsteadofToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 trait_reference_list:
         fully_qualified_class_name
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   trait_reference_list ',' fully_qualified_class_name
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2263,9 +2739,15 @@ trait_method_reference:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(name, $1, comment.IdentifierToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   trait_method_reference_fully_qualified
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 trait_method_reference_fully_qualified:
@@ -2281,6 +2763,8 @@ trait_method_reference_fully_qualified:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
                 yylex.(*Parser).comments.AddFromToken(target, $3, comment.IdentifierToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2297,6 +2781,8 @@ trait_alias:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken(alias, $4, comment.IdentifierToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   trait_method_reference T_AS member_modifier
             {
@@ -2307,14 +2793,24 @@ trait_alias:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 trait_modifiers:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   member_modifier
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 method_body:
@@ -2327,6 +2823,8 @@ method_body:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '{' inner_statement_list '}'
             {
@@ -2338,12 +2836,18 @@ method_body:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 variable_modifiers:
         non_empty_member_modifiers
-            { $$ = $1; }
+            {
+                $$ = $1; 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_VAR
             {
                 modifier := node.NewIdentifier($1.Value)
@@ -2354,21 +2858,39 @@ variable_modifiers:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(modifier, $1, comment.VarToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 method_modifiers:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_member_modifiers
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 non_empty_member_modifiers:
         member_modifier
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_member_modifiers member_modifier
-            { $$ = append($1, $2) }
+            {
+                $$ = append($1, $2) 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 member_modifier:
@@ -2381,6 +2903,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.PublicToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_PROTECTED
             {
@@ -2391,6 +2915,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ProtectedToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_PRIVATE
             {
@@ -2401,6 +2927,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.PrivateToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_STATIC
             {
@@ -2411,6 +2939,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StaticToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_ABSTRACT
             {
@@ -2421,6 +2951,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.AbstractToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FINAL
             {
@@ -2431,6 +2963,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.FinalToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2450,6 +2984,8 @@ class_variable_declaration:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(variable, $3, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   class_variable_declaration ',' T_VARIABLE '=' static_scalar
             {
@@ -2467,6 +3003,8 @@ class_variable_declaration:
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(variable, $3, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken(property, $4, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE
             {
@@ -2482,6 +3020,8 @@ class_variable_declaration:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE '=' static_scalar
             {
@@ -2498,6 +3038,8 @@ class_variable_declaration:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken(property, $2, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2519,6 +3061,8 @@ class_constant_declaration:
                 yylex.(*Parser).comments.AddFromToken(lastNode(constList.Consts), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(name, $3, comment.IdentifierToken)
                 yylex.(*Parser).comments.AddFromToken(constant, $4, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CONST T_STRING '=' static_scalar
             {
@@ -2535,6 +3079,8 @@ class_constant_declaration:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ConstToken)
                 yylex.(*Parser).comments.AddFromToken(name, $2, comment.IdentifierToken)
                 yylex.(*Parser).comments.AddFromToken(constant, $3, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2545,17 +3091,31 @@ echo_expr_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
 for_expr:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_for_expr
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 non_empty_for_expr:
@@ -2565,16 +3125,30 @@ non_empty_for_expr:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 chaining_method_or_property:
         chaining_method_or_property variable_property
-            { $$ = append($1, $2...) }
+            {
+                $$ = append($1, $2...) 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   variable_property
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 chaining_dereference:
@@ -2589,6 +3163,8 @@ chaining_dereference:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(fetch, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken(fetch, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '[' dim_offset ']'
             {
@@ -2601,23 +3177,45 @@ chaining_dereference:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(fetch, $1, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken(fetch, $3, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 chaining_instance_call:
         chaining_dereference chaining_method_or_property
-            { $$ = append($1, $2...) }
+            {
+                $$ = append($1, $2...) 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   chaining_dereference
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   chaining_method_or_property
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 instance_call:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   chaining_instance_call
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 new_expr:
@@ -2634,6 +3232,8 @@ new_expr:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NewToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2652,6 +3252,8 @@ expr_without_variable:
                 yylex.(*Parser).comments.AddFromToken(list, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken(list, $4, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable '=' expr
             {
@@ -2662,6 +3264,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable '=' '&' variable
             {
@@ -2673,6 +3277,8 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.EqualToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable '=' '&' T_NEW class_name_reference ctor_arguments
             {
@@ -2697,6 +3303,8 @@ expr_without_variable:
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.EqualToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.AmpersandToken)
                 yylex.(*Parser).comments.AddFromToken(_new, $4, comment.NewToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CLONE expr
             {
@@ -2707,6 +3315,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.CloneToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_PLUS_EQUAL expr
             {
@@ -2717,6 +3327,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PlusEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_MINUS_EQUAL expr
             {
@@ -2727,6 +3339,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.MinusEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_MUL_EQUAL expr
             {
@@ -2737,6 +3351,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.MulEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_POW_EQUAL expr
             {
@@ -2747,6 +3363,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PowEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_DIV_EQUAL expr
             {
@@ -2757,6 +3375,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.DivEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_CONCAT_EQUAL expr
             {
@@ -2767,6 +3387,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ConcatEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_MOD_EQUAL expr
             {
@@ -2777,6 +3399,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ModEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_AND_EQUAL expr
             {
@@ -2787,6 +3411,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AndEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_OR_EQUAL expr
             {
@@ -2797,6 +3423,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OrEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_XOR_EQUAL expr
             {
@@ -2807,6 +3435,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.XorEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_SL_EQUAL expr
             {
@@ -2817,6 +3447,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SlEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_SR_EQUAL expr
             {
@@ -2827,6 +3459,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SrEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   rw_variable T_INC
             {
@@ -2837,6 +3471,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IncToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_INC rw_variable
             {
@@ -2847,6 +3483,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IncToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   rw_variable T_DEC
             {
@@ -2857,6 +3495,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.DecToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DEC rw_variable
             {
@@ -2867,6 +3507,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DecToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_BOOLEAN_OR expr
             {
@@ -2877,6 +3519,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.BooleanOrToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_BOOLEAN_AND expr
             {
@@ -2887,6 +3531,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.BooleanAndToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_LOGICAL_OR expr
             {
@@ -2897,6 +3543,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LogicalOrToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_LOGICAL_AND expr
             {
@@ -2907,6 +3555,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LogicalAndToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_LOGICAL_XOR expr
             {
@@ -2917,6 +3567,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LogicalXorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '|' expr
             {
@@ -2927,6 +3579,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.VerticalBarToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '&' expr
             {
@@ -2937,6 +3591,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '^' expr
             {
@@ -2947,6 +3603,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.CaretToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '.' expr
             {
@@ -2957,6 +3615,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.DotToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '+' expr
             {
@@ -2967,6 +3627,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PlusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '-' expr
             {
@@ -2977,6 +3639,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.MinusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '*' expr
             {
@@ -2987,6 +3651,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsteriskToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_POW expr
             {
@@ -2997,6 +3663,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '/' expr
             {
@@ -3007,6 +3675,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SlashToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '%' expr
             {
@@ -3017,6 +3687,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PercentToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_SL expr
             {
@@ -3027,6 +3699,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SlToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_SR expr
             {
@@ -3037,6 +3711,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SrToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '+' expr %prec T_INC
             {
@@ -3047,6 +3723,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.PlusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '-' expr %prec T_INC
             {
@@ -3057,6 +3735,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.MinusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '!' expr
             {
@@ -3067,6 +3747,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ExclamationMarkToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '~' expr
             {
@@ -3077,6 +3759,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.TildeToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_IDENTICAL expr
             {
@@ -3087,6 +3771,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsIdenticalToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_NOT_IDENTICAL expr
             {
@@ -3097,6 +3783,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsNotIdenticalToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_EQUAL expr
             {
@@ -3107,6 +3795,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_NOT_EQUAL expr
             {
@@ -3117,6 +3807,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsNotEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '<' expr
             {
@@ -3127,6 +3819,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LessToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_SMALLER_OR_EQUAL expr
             {
@@ -3137,6 +3831,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsSmallerOrEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '>' expr
             {
@@ -3147,6 +3843,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.GreaterToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_GREATER_OR_EQUAL expr
             {
@@ -3157,6 +3855,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsGreaterOrEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_INSTANCEOF class_name_reference
             {
@@ -3167,11 +3867,21 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.InstanceofToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   parenthesis_expr
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   new_expr
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '(' new_expr ')' instance_call
             {
                 $$ = $2
@@ -3198,6 +3908,8 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '?' expr ':' expr
             {
@@ -3209,6 +3921,8 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.QuestionMarkToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '?' ':' expr
             {
@@ -3220,9 +3934,15 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.QuestionMarkToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   internal_functions_in_yacc
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_INT_CAST expr
             {
                 $$ = cast.NewInt($2)
@@ -3232,6 +3952,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IntCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DOUBLE_CAST expr
             {
@@ -3242,6 +3964,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DoubleCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_STRING_CAST expr
             {
@@ -3252,6 +3976,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StringCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_ARRAY_CAST expr
             {
@@ -3262,6 +3988,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ArrayCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_OBJECT_CAST expr
             {
@@ -3272,6 +4000,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ObjectCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_BOOL_CAST expr
             {
@@ -3282,6 +4012,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.BoolCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_UNSET_CAST expr
             {
@@ -3292,6 +4024,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UnsetCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_EXIT exit_expr
             {
@@ -3320,6 +4054,8 @@ expr_without_variable:
                 if $2 != nil {
                     yylex.(*Parser).comments.AddFromChildNode($$, $2)
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '@' expr
             {
@@ -3330,13 +4066,27 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.AtToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   scalar
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   combined_scalar_offset
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   combined_scalar
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '`' backticks_expr '`'
             {
                 $$ = expr.NewShellExec($2)
@@ -3347,6 +4097,8 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.BackquoteToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.BackquoteToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_PRINT expr
             {
@@ -3357,6 +4109,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.PrintToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_YIELD
             {
@@ -3367,6 +4121,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.YieldToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   function is_reference '(' parameter_list ')' lexical_vars '{' inner_statement_list '}'
             {
@@ -3384,6 +4140,8 @@ expr_without_variable:
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $9, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_STATIC function is_reference '(' parameter_list ')' lexical_vars '{' inner_statement_list '}'
             {
@@ -3402,6 +4160,8 @@ expr_without_variable:
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $8, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $10, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3415,6 +4175,8 @@ yield_expr:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.YieldToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_YIELD variable
             {
@@ -3425,6 +4187,8 @@ yield_expr:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.YieldToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_YIELD expr T_DOUBLE_ARROW expr_without_variable
             {
@@ -3436,6 +4200,8 @@ yield_expr:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.YieldToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.DoubleArrowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_YIELD expr T_DOUBLE_ARROW variable
             {
@@ -3447,6 +4213,8 @@ yield_expr:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.YieldToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.DoubleArrowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3461,6 +4229,8 @@ combined_scalar_offset:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   combined_scalar_offset '[' dim_offset ']'
             {
@@ -3472,6 +4242,8 @@ combined_scalar_offset:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CONSTANT_ENCAPSED_STRING '[' dim_offset ']'
             {
@@ -3485,6 +4257,8 @@ combined_scalar_offset:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   general_constant '[' dim_offset ']'
             {
@@ -3496,6 +4270,8 @@ combined_scalar_offset:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3511,6 +4287,8 @@ combined_scalar:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ArrayToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '[' array_pair_list ']'
             {
@@ -3522,22 +4300,32 @@ combined_scalar:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 function:
     T_FUNCTION
-        { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 lexical_vars:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_USE '(' lexical_var_list ')'
             {
                 $$ = expr.NewClosureUse($3)
 
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewTokensPosition($1, $4))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3555,6 +4343,8 @@ lexical_var_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(variable, $3, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   lexical_var_list ',' '&' T_VARIABLE
             {
@@ -3571,6 +4361,8 @@ lexical_var_list:
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(reference, $3, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken(variable, $4, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE
             {
@@ -3584,6 +4376,8 @@ lexical_var_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '&' T_VARIABLE
             {
@@ -3600,6 +4394,8 @@ lexical_var_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(reference, $1, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken(variable, $2, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3612,6 +4408,8 @@ function_call:
                 // save position
                 yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodesPosition(name, $2))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE T_NS_SEPARATOR namespace_name function_call_parameter_list
             {
@@ -3625,6 +4423,8 @@ function_call:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(funcName, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken(funcName, $2, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name function_call_parameter_list
             {
@@ -3637,6 +4437,8 @@ function_call:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(funcName, $1, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   class_name T_PAAMAYIM_NEKUDOTAYIM variable_name function_call_parameter_list
             {
@@ -3647,6 +4449,8 @@ function_call:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   class_name T_PAAMAYIM_NEKUDOTAYIM variable_without_objects function_call_parameter_list
             {
@@ -3657,6 +4461,8 @@ function_call:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable_class_name T_PAAMAYIM_NEKUDOTAYIM variable_name function_call_parameter_list
             {
@@ -3667,6 +4473,8 @@ function_call:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable_class_name T_PAAMAYIM_NEKUDOTAYIM variable_without_objects function_call_parameter_list
             {
@@ -3677,6 +4485,8 @@ function_call:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable_without_objects function_call_parameter_list
             {
@@ -3684,6 +4494,8 @@ function_call:
                 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodesPosition($1, $2))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3697,6 +4509,8 @@ class_name:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StaticToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   namespace_name 
             {
@@ -3704,6 +4518,8 @@ class_name:
                 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE T_NS_SEPARATOR namespace_name
             {
@@ -3715,6 +4531,8 @@ class_name:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name
             {
@@ -3725,6 +4543,8 @@ class_name:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3735,6 +4555,8 @@ fully_qualified_class_name:
                 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE T_NS_SEPARATOR namespace_name
             {
@@ -3746,6 +4568,8 @@ fully_qualified_class_name:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name
             {
@@ -3756,14 +4580,24 @@ fully_qualified_class_name:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 class_name_reference:
         class_name
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   dynamic_class_name_reference
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 dynamic_class_name_reference:
@@ -3801,17 +4635,31 @@ dynamic_class_name_reference:
                             $$ = nn
                     }
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   base_variable 
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
 dynamic_class_name_variable_properties:
         dynamic_class_name_variable_properties dynamic_class_name_variable_property
-            { $$ = append($1, $2...) }
+            {
+                $$ = append($1, $2...) 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
@@ -3822,12 +4670,18 @@ dynamic_class_name_variable_property:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($2[0], $1, comment.ObjectOperatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 exit_expr:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '(' ')'
             {
                 $$ = expr.NewExit(nil);
@@ -3838,6 +4692,8 @@ exit_expr:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   parenthesis_expr
             {
@@ -3845,23 +4701,45 @@ exit_expr:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 backticks_expr:
         /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_ENCAPSED_AND_WHITESPACE
-            { $$ = []node.Node{scalar.NewEncapsedStringPart($1.Value)} }
+            {
+                $$ = []node.Node{scalar.NewEncapsedStringPart($1.Value)} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   encaps_list
-            { $$ = $1; }
+            {
+                $$ = $1; 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 ctor_arguments:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   function_call_parameter_list
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 common_scalar:
@@ -3874,6 +4752,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.LnumberToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DNUMBER
             {
@@ -3884,6 +4764,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DnumberToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CONSTANT_ENCAPSED_STRING
             {
@@ -3894,6 +4776,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ConstantEncapsedStringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_LINE
             {
@@ -3904,6 +4788,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.LineToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FILE
             {
@@ -3914,6 +4800,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.FileToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DIR
             {
@@ -3924,6 +4812,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DirToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_TRAIT_C
             {
@@ -3934,6 +4824,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.TraitCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_METHOD_C
             {
@@ -3944,6 +4836,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.MethodCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FUNC_C
             {
@@ -3954,6 +4848,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.FuncCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_C
             {
@@ -3964,6 +4860,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_START_HEREDOC T_ENCAPSED_AND_WHITESPACE T_END_HEREDOC 
             {
@@ -3976,6 +4874,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StartHeredocToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_START_HEREDOC T_END_HEREDOC
             {
@@ -3986,6 +4886,8 @@ common_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StartHeredocToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4002,19 +4904,33 @@ static_class_constant:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
                 yylex.(*Parser).comments.AddFromToken(target, $3, comment.IdentifierToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 static_scalar:
         static_scalar_value
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 static_scalar_value:
         common_scalar
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   static_class_name_scalar
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   namespace_name
             {
                 name := name.NewName($1)
@@ -4023,6 +4939,8 @@ static_scalar_value:
                 // save position
                 yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition(name))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE T_NS_SEPARATOR namespace_name
             {
@@ -4036,6 +4954,8 @@ static_scalar_value:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name
             {
@@ -4048,6 +4968,8 @@ static_scalar_value:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_ARRAY '(' static_array_pair_list ')'
             {
@@ -4060,6 +4982,8 @@ static_scalar_value:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ArrayToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '[' static_array_pair_list ']'
             {
@@ -4071,9 +4995,15 @@ static_scalar_value:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_class_constant
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_CLASS_C
             {
                 $$ = scalar.NewMagicConstant($1.Value)
@@ -4083,9 +5013,15 @@ static_scalar_value:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ClassCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_operation
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 static_operation:
@@ -4099,6 +5035,8 @@ static_operation:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '+' static_scalar_value
             {
@@ -4109,6 +5047,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PlusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '-' static_scalar_value
             {
@@ -4119,6 +5059,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.MinusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '*' static_scalar_value
             {
@@ -4129,6 +5071,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsteriskToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_POW static_scalar_value
             {
@@ -4139,6 +5083,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '/' static_scalar_value
             {
@@ -4149,6 +5095,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SlashToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '%' static_scalar_value
             {
@@ -4159,6 +5107,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PercentToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '!' static_scalar_value
             {
@@ -4169,6 +5119,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ExclamationMarkToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '~' static_scalar_value
             {
@@ -4179,6 +5131,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.TildeToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '|' static_scalar_value
             {
@@ -4189,6 +5143,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.VerticalBarToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '&' static_scalar_value
             {
@@ -4199,6 +5155,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '^' static_scalar_value
             {
@@ -4209,6 +5167,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.CaretToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_SL static_scalar_value
             {
@@ -4219,6 +5179,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SlToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_SR static_scalar_value
             {
@@ -4229,6 +5191,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SrToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '.' static_scalar_value
             {
@@ -4239,6 +5203,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.DotToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_LOGICAL_XOR static_scalar_value
             {
@@ -4249,6 +5215,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LogicalXorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_LOGICAL_AND static_scalar_value
             {
@@ -4259,6 +5227,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LogicalAndToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_LOGICAL_OR static_scalar_value
             {
@@ -4269,6 +5239,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LogicalOrToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_BOOLEAN_AND static_scalar_value
             {
@@ -4279,6 +5251,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.BooleanAndToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_BOOLEAN_OR static_scalar_value
             {
@@ -4289,6 +5263,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.BooleanOrToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_IS_IDENTICAL static_scalar_value
             {
@@ -4299,6 +5275,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsIdenticalToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_IS_NOT_IDENTICAL static_scalar_value
             {
@@ -4309,6 +5287,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsNotIdenticalToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_IS_EQUAL static_scalar_value
             {
@@ -4319,6 +5299,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_IS_NOT_EQUAL static_scalar_value
             {
@@ -4329,6 +5311,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsNotEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '<' static_scalar_value
             {
@@ -4339,6 +5323,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LessToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '>' static_scalar_value
             {
@@ -4349,6 +5335,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.GreaterToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_IS_SMALLER_OR_EQUAL static_scalar_value
             {
@@ -4359,6 +5347,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsSmallerOrEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_IS_GREATER_OR_EQUAL static_scalar_value
             {
@@ -4369,6 +5359,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsGreaterOrEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '?' ':' static_scalar_value
             {
@@ -4380,6 +5372,8 @@ static_operation:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.QuestionMarkToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value '?' static_scalar_value ':' static_scalar_value
             {
@@ -4391,6 +5385,8 @@ static_operation:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.QuestionMarkToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '+' static_scalar_value
             {
@@ -4401,6 +5397,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.PlusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '-' static_scalar_value
             {
@@ -4411,6 +5409,8 @@ static_operation:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.MinusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '(' static_scalar_value ')'
             {
@@ -4419,12 +5419,18 @@ static_operation:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 general_constant:
         class_constant
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   namespace_name
             {
                 name := name.NewName($1)
@@ -4433,6 +5439,8 @@ general_constant:
                 // save position
                 yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition(name))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE T_NS_SEPARATOR namespace_name
             {
@@ -4444,6 +5452,8 @@ general_constant:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name
             {
@@ -4456,6 +5466,8 @@ general_constant:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4471,13 +5483,27 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(name, $1, comment.StringVarnameToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   general_constant
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   class_name_scalar
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   common_scalar
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '"' encaps_list '"'
             {
                 $$ = scalar.NewEncapsed($2)
@@ -4487,6 +5513,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DoubleQuoteToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_START_HEREDOC encaps_list T_END_HEREDOC
             {
@@ -4497,6 +5525,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StartHeredocToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CLASS_C
             {
@@ -4507,12 +5537,18 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ClassCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 static_array_pair_list:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_static_array_pair_list possible_comma
             {
                 $$ = $1
@@ -4521,14 +5557,20 @@ static_array_pair_list:
                 if $2 != nil {
                     yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 possible_comma:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+            }
     |   ','
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 non_empty_static_array_pair_list:
@@ -4543,6 +5585,8 @@ non_empty_static_array_pair_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(arrayItem, $4, comment.DoubleArrowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   non_empty_static_array_pair_list ',' static_scalar_value
             {
@@ -4554,6 +5598,8 @@ non_empty_static_array_pair_list:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value T_DOUBLE_ARROW static_scalar_value
             {
@@ -4565,6 +5611,8 @@ non_empty_static_array_pair_list:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(arrayItem, $2, comment.DoubleArrowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_scalar_value
             {
@@ -4573,38 +5621,68 @@ non_empty_static_array_pair_list:
                 
                 // save position
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 expr:
         r_variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   expr_without_variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 parenthesis_expr:
         '(' expr ')'
-            { $$ = $2 }
+            {
+                $$ = $2 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '(' yield_expr ')'
-            { $$ = $2 }
+            {
+                $$ = $2 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
 r_variable:
         variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
 w_variable:
         variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 rw_variable:
         variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 variable:
@@ -4657,16 +5735,30 @@ variable:
                             $$ = nn
                     }
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   base_variable_with_function_calls
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 variable_properties:
         variable_properties variable_property
-            { $$ = append($1, $2...) }
+            {
+                $$ = append($1, $2...) 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
@@ -4682,6 +5774,8 @@ variable_property:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($2[0], $1, comment.ObjectOperatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4697,6 +5791,8 @@ array_method_dereference:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(fetch, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken(fetch, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   method '[' dim_offset ']'
             {
@@ -4709,6 +5805,8 @@ array_method_dereference:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(fetch, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken(fetch, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4719,21 +5817,39 @@ method:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 method_or_not:
         method
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   array_method_dereference
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 variable_without_objects:
         reference_variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   simple_indirect_reference reference_variable
             {
                 $1.last.SetVarName($2)
@@ -4743,6 +5859,8 @@ variable_without_objects:
                 }
 
                 $$ = $1.all[0]
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4756,6 +5874,8 @@ static_member:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable_class_name T_PAAMAYIM_NEKUDOTAYIM variable_without_objects
             {
@@ -4766,13 +5886,18 @@ static_member:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
-            }
 
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 variable_class_name:
         reference_variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 array_function_dereference:
@@ -4786,6 +5911,8 @@ array_function_dereference:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   function_call '[' dim_offset ']'
             {
@@ -4797,19 +5924,40 @@ array_function_dereference:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 base_variable_with_function_calls:
-        base_variable               { $$ = $1 }
-    |   array_function_dereference  { $$ = $1 }
-    |   function_call               { $$ = $1 }
+        base_variable
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
+    |   array_function_dereference
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
+    |   function_call
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
 base_variable:
         reference_variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   simple_indirect_reference reference_variable
             {
                 $1.last.SetVarName($2)
@@ -4819,9 +5967,15 @@ base_variable:
                 }
 
                 $$ = $1.all[0]
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_member
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 reference_variable:
@@ -4835,6 +5989,8 @@ reference_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   reference_variable '{' expr '}'
             {
@@ -4846,9 +6002,15 @@ reference_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   compound_variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
@@ -4864,6 +6026,8 @@ compound_variable:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '$' '{' expr '}'
             {
@@ -4876,20 +6040,34 @@ compound_variable:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DollarToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 dim_offset:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   expr
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
 object_property:
         object_dim_list 
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   variable_without_objects
             {
                 fetch := expr.NewPropertyFetch(nil, $1)
@@ -4897,6 +6075,8 @@ object_property:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition(fetch, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4912,6 +6092,8 @@ object_dim_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(fetch, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken(fetch, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   object_dim_list '{' expr '}'
             {
@@ -4924,6 +6106,8 @@ object_dim_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(fetch, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken(fetch, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable_name
             {
@@ -4932,6 +6116,8 @@ object_dim_list:
                 
                 // save position
                 yylex.(*Parser).positions.AddPosition(fetch, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4945,6 +6131,8 @@ variable_name:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '{' expr '}'
             {
@@ -4956,6 +6144,8 @@ variable_name:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4970,6 +6160,8 @@ simple_indirect_reference:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(n, $1, comment.DollarToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   simple_indirect_reference '$'
             {
@@ -4985,6 +6177,8 @@ simple_indirect_reference:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(n, $2, comment.DollarToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4995,6 +6189,8 @@ assignment_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   assignment_list_element
             {
@@ -5003,6 +6199,8 @@ assignment_list:
                 } else {
                     $$ = []node.Node{$1}
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -5014,6 +6212,8 @@ assignment_list_element:
                 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_LIST '(' assignment_list ')'
             {
@@ -5028,15 +6228,25 @@ assignment_list_element:
                 yylex.(*Parser).comments.AddFromToken(item, $1, comment.ListToken)
                 yylex.(*Parser).comments.AddFromToken(item, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken(item, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   /* empty */
-            { $$ = nil }
+            {
+                $$ = nil 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 
 array_pair_list:
         /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_array_pair_list possible_comma
             {
                 $$ = $1
@@ -5045,6 +6255,8 @@ array_pair_list:
                 if $2 != nil {
                     yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -5060,6 +6272,8 @@ non_empty_array_pair_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(arrayItem, $4, comment.DoubleArrowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   non_empty_array_pair_list ',' expr
             {
@@ -5071,6 +6285,8 @@ non_empty_array_pair_list:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_DOUBLE_ARROW expr
             {
@@ -5082,6 +6298,8 @@ non_empty_array_pair_list:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(arrayItem, $2, comment.DoubleArrowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr
             {
@@ -5090,6 +6308,8 @@ non_empty_array_pair_list:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   non_empty_array_pair_list ',' expr T_DOUBLE_ARROW '&' w_variable
             {
@@ -5105,6 +6325,8 @@ non_empty_array_pair_list:
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(arrayItem, $4, comment.DoubleArrowToken)
                 yylex.(*Parser).comments.AddFromToken(reference, $5, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   non_empty_array_pair_list ',' '&' w_variable
             {
@@ -5119,6 +6341,8 @@ non_empty_array_pair_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
                 yylex.(*Parser).comments.AddFromToken(reference, $3, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_DOUBLE_ARROW '&' w_variable
             {
@@ -5133,6 +6357,8 @@ non_empty_array_pair_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(arrayItem, $2, comment.DoubleArrowToken)
                 yylex.(*Parser).comments.AddFromToken(reference, $3, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '&' w_variable
             {
@@ -5146,12 +6372,18 @@ non_empty_array_pair_list:
                 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(reference, $1, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 encaps_list:
         encaps_list encaps_var
-            { $$ = append($1, $2) }
+            {
+                $$ = append($1, $2) 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   encaps_list T_ENCAPSED_AND_WHITESPACE
             {
                 encapsed := scalar.NewEncapsedStringPart($2.Value)
@@ -5162,9 +6394,15 @@ encaps_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(encapsed, $2, comment.EncapsedAndWhitespaceToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   encaps_var
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_ENCAPSED_AND_WHITESPACE encaps_var
             {
                 encapsed := scalar.NewEncapsedStringPart($1.Value)
@@ -5175,6 +6413,8 @@ encaps_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(encapsed, $1, comment.EncapsedAndWhitespaceToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -5190,6 +6430,8 @@ encaps_var:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE '[' encaps_var_offset ']'
             {
@@ -5206,6 +6448,8 @@ encaps_var:
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE T_OBJECT_OPERATOR T_STRING
             {
@@ -5224,6 +6468,8 @@ encaps_var:
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ObjectOperatorToken)
                 yylex.(*Parser).comments.AddFromToken(fetch, $3, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DOLLAR_OPEN_CURLY_BRACES expr '}'
             {
@@ -5235,6 +6481,8 @@ encaps_var:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DollarOpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DOLLAR_OPEN_CURLY_BRACES T_STRING_VARNAME '}'
             {
@@ -5249,6 +6497,8 @@ encaps_var:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DollarOpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken(name, $2, comment.StringVarnameToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DOLLAR_OPEN_CURLY_BRACES T_STRING_VARNAME '[' expr ']' '}'
             {
@@ -5267,10 +6517,14 @@ encaps_var:
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.CloseSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CURLY_OPEN variable '}'
             {
                 $$ = $2;
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -5284,6 +6538,8 @@ encaps_var_offset:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NUM_STRING
             {
@@ -5299,6 +6555,8 @@ encaps_var_offset:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NumStringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE
             {
@@ -5311,6 +6569,8 @@ encaps_var_offset:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -5326,6 +6586,8 @@ internal_functions_in_yacc:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IssetToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_EMPTY '(' variable ')'
             {
@@ -5338,6 +6600,8 @@ internal_functions_in_yacc:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.EmptyToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_EMPTY '(' expr ')'
             {
@@ -5350,6 +6614,8 @@ internal_functions_in_yacc:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.EmptyToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_INCLUDE expr
             {
@@ -5360,6 +6626,8 @@ internal_functions_in_yacc:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IncludeToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_INCLUDE_ONCE expr
             {
@@ -5370,6 +6638,8 @@ internal_functions_in_yacc:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IncludeOnceToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_EVAL '(' expr ')'
             {
@@ -5382,6 +6652,8 @@ internal_functions_in_yacc:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.EvalToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_REQUIRE expr
             {
@@ -5392,6 +6664,8 @@ internal_functions_in_yacc:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.RequireToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_REQUIRE_ONCE expr
             {
@@ -5402,26 +6676,42 @@ internal_functions_in_yacc:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.RequireOnceToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 isset_variables:
         isset_variable
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1} 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   isset_variables ',' isset_variable
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 isset_variable:
         variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   expr_without_variable
-            { $$ = $1 }
+            {
+                $$ = $1 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 class_constant:
@@ -5436,6 +6726,8 @@ class_constant:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable_class_name T_PAAMAYIM_NEKUDOTAYIM T_STRING
             {
@@ -5448,6 +6740,8 @@ class_constant:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -5463,6 +6757,8 @@ static_class_name_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -5478,6 +6774,8 @@ class_name_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
diff --git a/php7/parser.go b/php7/parser.go
index 61f7ca7..20eda2c 100644
--- a/php7/parser.go
+++ b/php7/parser.go
@@ -106,3 +106,13 @@ func firstNode(nn []node.Node) node.Node {
 func isDollar(r rune) bool {
 	return r == '$'
 }
+
+func (p *Parser) returnTokenToPool(yyDollar []yySymType, yyVAL *yySymType) {
+	for i := 1; i < len(yyDollar); i++ {
+		if yyDollar[i].token != nil {
+			p.TokenPool.Put(yyDollar[i].token)
+		}
+		yyDollar[i].token = nil
+	}
+	yyVAL.token = nil
+}
diff --git a/php7/php7.go b/php7/php7.go
index b4f2ded..dead580 100644
--- a/php7/php7.go
+++ b/php7/php7.go
@@ -346,7 +346,7 @@ const yyEofCode = 1
 const yyErrCode = 2
 const yyInitialStackSize = 16
 
-//line php7/php7.y:4306
+//line php7/php7.y:5344
 
 //line yacctab:1
 var yyExca = [...]int{
@@ -2120,480 +2120,486 @@ yydefault:
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yylex.(*Parser).rootNode, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 2:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:309
+		//line php7/php7.y:311
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 3:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:309
+		//line php7/php7.y:311
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 4:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:309
+		//line php7/php7.y:311
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 5:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:309
+		//line php7/php7.y:311
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 6:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:309
+		//line php7/php7.y:311
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 7:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:309
+		//line php7/php7.y:311
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 8:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:309
+		//line php7/php7.y:311
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 9:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:309
+		//line php7/php7.y:311
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 10:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 11:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 12:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 13:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 14:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 15:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 16:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 17:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 18:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 19:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 20:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 21:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:310
+		//line php7/php7.y:312
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 22:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:311
+		//line php7/php7.y:313
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 23:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:311
+		//line php7/php7.y:313
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 24:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:311
+		//line php7/php7.y:313
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 25:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:311
+		//line php7/php7.y:313
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 26:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:311
+		//line php7/php7.y:313
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 27:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:311
+		//line php7/php7.y:313
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 28:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:311
+		//line php7/php7.y:313
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 29:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:311
+		//line php7/php7.y:313
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 30:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:311
+		//line php7/php7.y:313
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 31:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:311
+		//line php7/php7.y:313
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 32:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:312
+		//line php7/php7.y:314
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 33:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:312
+		//line php7/php7.y:314
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 34:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:312
+		//line php7/php7.y:314
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 35:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:312
+		//line php7/php7.y:314
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 36:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:312
+		//line php7/php7.y:314
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 37:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:312
+		//line php7/php7.y:314
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 38:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:312
+		//line php7/php7.y:314
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 39:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:312
+		//line php7/php7.y:314
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 40:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:312
+		//line php7/php7.y:314
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 41:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:312
+		//line php7/php7.y:314
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 42:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 43:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 44:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 45:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 46:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 47:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 48:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 49:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 50:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 51:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 52:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:313
+		//line php7/php7.y:315
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 53:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:314
+		//line php7/php7.y:316
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 54:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:314
+		//line php7/php7.y:316
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 55:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:314
+		//line php7/php7.y:316
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 56:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:314
+		//line php7/php7.y:316
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 57:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:314
+		//line php7/php7.y:316
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 58:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:314
+		//line php7/php7.y:316
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 59:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:314
+		//line php7/php7.y:316
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 60:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:314
+		//line php7/php7.y:316
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 61:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:315
+		//line php7/php7.y:317
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 62:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:315
+		//line php7/php7.y:317
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 63:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:315
+		//line php7/php7.y:317
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 64:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:315
+		//line php7/php7.y:317
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 65:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:315
+		//line php7/php7.y:317
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 66:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:315
+		//line php7/php7.y:317
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 67:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:315
+		//line php7/php7.y:317
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 68:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:315
+		//line php7/php7.y:317
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 69:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:320
+		//line php7/php7.y:322
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 70:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:321
+		//line php7/php7.y:325
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 71:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:321
+		//line php7/php7.y:325
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 72:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:321
+		//line php7/php7.y:325
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 73:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:321
+		//line php7/php7.y:325
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 74:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:321
+		//line php7/php7.y:325
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 75:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:321
+		//line php7/php7.y:325
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 76:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:326
+		//line php7/php7.y:330
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 77:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:328
+		//line php7/php7.y:334
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 78:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:333
+		//line php7/php7.y:341
 		{
 			if yyDollar[2].node != nil {
 				yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 79:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:339
+		//line php7/php7.y:349
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 80:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:344
+		//line php7/php7.y:358
 		{
 			namePart := name.NewNamePart(yyDollar[1].token.Value)
 			yyVAL.list = []node.Node{namePart}
@@ -2603,10 +2609,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(namePart, yyDollar[1].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 81:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:355
+		//line php7/php7.y:371
 		{
 			namePart := name.NewNamePart(yyDollar[3].token.Value)
 			yyVAL.list = append(yyDollar[1].list, namePart)
@@ -2617,19 +2625,23 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.NsSeparatorToken)
 			yylex.(*Parser).comments.AddFromToken(namePart, yyDollar[3].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 82:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:370
+		//line php7/php7.y:388
 		{
 			yyVAL.node = name.NewName(yyDollar[1].list)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 83:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:377
+		//line php7/php7.y:397
 		{
 			yyVAL.node = name.NewRelative(yyDollar[3].list)
 
@@ -2639,10 +2651,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 84:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:388
+		//line php7/php7.y:410
 		{
 			yyVAL.node = name.NewFullyQualified(yyDollar[2].list)
 
@@ -2651,47 +2665,61 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 85:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:401
+		//line php7/php7.y:425
 		{
 			// error
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 86:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:406
+		//line php7/php7.y:432
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 87:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:408
+		//line php7/php7.y:438
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 88:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:410
+		//line php7/php7.y:444
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 89:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:412
+		//line php7/php7.y:450
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 90:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:414
+		//line php7/php7.y:456
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 91:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:416
+		//line php7/php7.y:462
 		{
 			yyVAL.node = stmt.NewHaltCompiler()
 
@@ -2703,10 +2731,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 92:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:429
+		//line php7/php7.y:477
 		{
 			name := name.NewName(yyDollar[2].list)
 			yyVAL.node = stmt.NewNamespace(name, nil)
@@ -2718,10 +2748,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 93:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php7/php7.y:442
+		//line php7/php7.y:492
 		{
 			name := name.NewName(yyDollar[2].list)
 			yyVAL.node = stmt.NewNamespace(name, yyDollar[4].list)
@@ -2734,10 +2766,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 94:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:456
+		//line php7/php7.y:508
 		{
 			yyVAL.node = stmt.NewNamespace(nil, yyDollar[3].list)
 
@@ -2748,10 +2782,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NamespaceToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 95:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:468
+		//line php7/php7.y:522
 		{
 			yyVAL.node = yyDollar[2].node
 
@@ -2761,10 +2797,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UseToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 96:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:479
+		//line php7/php7.y:535
 		{
 			yyVAL.node = yyDollar[3].node.(*stmt.GroupUse).SetUseType(yyDollar[2].node)
 
@@ -2774,10 +2812,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UseToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 97:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:490
+		//line php7/php7.y:548
 		{
 			yyVAL.node = stmt.NewUseList(nil, yyDollar[2].list)
 
@@ -2787,10 +2827,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UseToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 98:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:501
+		//line php7/php7.y:561
 		{
 			yyVAL.node = stmt.NewUseList(yyDollar[2].node, yyDollar[3].list)
 
@@ -2800,10 +2842,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UseToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 99:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:512
+		//line php7/php7.y:574
 		{
 			yyVAL.node = stmt.NewConstList(yyDollar[2].list)
 
@@ -2813,10 +2857,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ConstToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 100:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:526
+		//line php7/php7.y:590
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -2825,10 +2871,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.FunctionToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 101:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:536
+		//line php7/php7.y:602
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -2837,10 +2885,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ConstToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 102:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:549
+		//line php7/php7.y:617
 		{
 			name := name.NewName(yyDollar[1].list)
 			yyVAL.node = stmt.NewGroupUse(nil, name, yyDollar[4].list)
@@ -2856,10 +2906,12 @@ yydefault:
 				yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.CommaToken)
 			}
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 103:
 		yyDollar = yyS[yypt-7 : yypt+1]
-		//line php7/php7.y:566
+		//line php7/php7.y:636
 		{
 			name := name.NewName(yyDollar[2].list)
 			yyVAL.node = stmt.NewGroupUse(nil, name, yyDollar[5].list)
@@ -2876,10 +2928,12 @@ yydefault:
 				yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CommaToken)
 			}
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 104:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:587
+		//line php7/php7.y:659
 		{
 			name := name.NewName(yyDollar[1].list)
 			yyVAL.node = stmt.NewGroupUse(nil, name, yyDollar[4].list)
@@ -2895,10 +2949,12 @@ yydefault:
 				yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.CommaToken)
 			}
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 105:
 		yyDollar = yyS[yypt-7 : yypt+1]
-		//line php7/php7.y:604
+		//line php7/php7.y:678
 		{
 			name := name.NewName(yyDollar[2].list)
 			yyVAL.node = stmt.NewGroupUse(nil, name, yyDollar[5].list)
@@ -2915,79 +2971,97 @@ yydefault:
 				yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CommaToken)
 			}
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 106:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:625
+		//line php7/php7.y:701
 		{
 			yyVAL.token = nil
 		}
 	case 107:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:627
+		//line php7/php7.y:705
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 108:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:632
+		//line php7/php7.y:712
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 109:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:639
+		//line php7/php7.y:721
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 110:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:644
+		//line php7/php7.y:730
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 111:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:651
+		//line php7/php7.y:739
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 112:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:656
+		//line php7/php7.y:748
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 113:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:663
+		//line php7/php7.y:757
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 114:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:668
+		//line php7/php7.y:766
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 115:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:670
+		//line php7/php7.y:772
 		{
 			yyVAL.node = yyDollar[2].node.(*stmt.Use).SetUseType(yyDollar[1].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 116:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:675
+		//line php7/php7.y:781
 		{
 			name := name.NewName(yyDollar[1].list)
 			yyVAL.node = stmt.NewUse(nil, name, nil)
@@ -2995,10 +3069,12 @@ yydefault:
 			// save position
 			yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodeListPosition(yyDollar[1].list))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 117:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:684
+		//line php7/php7.y:792
 		{
 			name := name.NewName(yyDollar[1].list)
 			alias := node.NewIdentifier(yyDollar[3].token.Value)
@@ -3012,91 +3088,117 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(alias, yyDollar[3].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 118:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:702
+		//line php7/php7.y:812
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 119:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:704
+		//line php7/php7.y:818
 		{
 			yyVAL.node = yyDollar[2].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 120:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:714
+		//line php7/php7.y:830
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 121:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:721
+		//line php7/php7.y:839
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 122:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:726
+		//line php7/php7.y:848
 		{
 			if yyDollar[2].node != nil {
 				yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 123:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:732
+		//line php7/php7.y:856
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 124:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:737
+		//line php7/php7.y:865
 		{
 			// error
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 125:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:742
+		//line php7/php7.y:872
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 126:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:744
+		//line php7/php7.y:878
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 127:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:746
+		//line php7/php7.y:884
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 128:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:748
+		//line php7/php7.y:890
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 129:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:750
+		//line php7/php7.y:896
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 130:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:752
+		//line php7/php7.y:902
 		{
 			yyVAL.node = stmt.NewHaltCompiler()
 
@@ -3108,10 +3210,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 131:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:767
+		//line php7/php7.y:919
 		{
 			yyVAL.node = stmt.NewStmtList(yyDollar[2].list)
 
@@ -3121,22 +3225,28 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 132:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:778
+		//line php7/php7.y:932
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 133:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:780
+		//line php7/php7.y:938
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 134:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php7/php7.y:782
+		//line php7/php7.y:944
 		{
 			switch n := yyDollar[5].node.(type) {
 			case *stmt.While:
@@ -3154,10 +3264,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.WhileToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 135:
 		yyDollar = yyS[yypt-7 : yypt+1]
-		//line php7/php7.y:801
+		//line php7/php7.y:965
 		{
 			yyVAL.node = stmt.NewDo(yyDollar[2].node, yyDollar[5].node)
 
@@ -3170,10 +3282,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 136:
 		yyDollar = yyS[yypt-9 : yypt+1]
-		//line php7/php7.y:815
+		//line php7/php7.y:981
 		{
 			switch n := yyDollar[9].node.(type) {
 			case *stmt.For:
@@ -3197,10 +3311,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.ForInitSemicolonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.ForCondSemicolonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[8].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 137:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php7/php7.y:840
+		//line php7/php7.y:1008
 		{
 			switch n := yyDollar[5].node.(type) {
 			case *stmt.Switch:
@@ -3220,10 +3336,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.SwitchToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 138:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:861
+		//line php7/php7.y:1031
 		{
 			yyVAL.node = stmt.NewBreak(yyDollar[2].node)
 
@@ -3233,10 +3351,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.BreakToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 139:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:872
+		//line php7/php7.y:1044
 		{
 			yyVAL.node = stmt.NewContinue(yyDollar[2].node)
 
@@ -3246,10 +3366,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ContinueToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 140:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:883
+		//line php7/php7.y:1057
 		{
 			yyVAL.node = stmt.NewReturn(yyDollar[2].node)
 
@@ -3259,10 +3381,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ReturnToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 141:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:894
+		//line php7/php7.y:1070
 		{
 			yyVAL.node = stmt.NewGlobal(yyDollar[2].list)
 
@@ -3272,10 +3396,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.GlobalToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 142:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:905
+		//line php7/php7.y:1083
 		{
 			yyVAL.node = stmt.NewStatic(yyDollar[2].list)
 
@@ -3285,10 +3411,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StaticToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 143:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:916
+		//line php7/php7.y:1096
 		{
 			yyVAL.node = stmt.NewEcho(yyDollar[2].list)
 
@@ -3298,10 +3426,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.EchoToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 144:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:927
+		//line php7/php7.y:1109
 		{
 			yyVAL.node = stmt.NewInlineHtml(yyDollar[1].token.Value)
 
@@ -3310,10 +3440,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.InlineHTMLToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 145:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:937
+		//line php7/php7.y:1121
 		{
 			yyVAL.node = stmt.NewExpression(yyDollar[1].node)
 
@@ -3322,10 +3454,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 146:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:947
+		//line php7/php7.y:1133
 		{
 			yyVAL.node = stmt.NewUnset(yyDollar[3].list)
 
@@ -3340,10 +3474,12 @@ yydefault:
 			}
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 147:
 		yyDollar = yyS[yypt-7 : yypt+1]
-		//line php7/php7.y:963
+		//line php7/php7.y:1151
 		{
 			switch n := yyDollar[7].node.(type) {
 			case *stmt.Foreach:
@@ -3364,10 +3500,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 148:
 		yyDollar = yyS[yypt-9 : yypt+1]
-		//line php7/php7.y:985
+		//line php7/php7.y:1175
 		{
 			switch n := yyDollar[9].node.(type) {
 			case *stmt.Foreach:
@@ -3391,10 +3529,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.DoubleArrowToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[8].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 149:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php7/php7.y:1010
+		//line php7/php7.y:1202
 		{
 			yyVAL.node = stmt.NewDeclare(yyDollar[3].list, yyDollar[5].node)
 
@@ -3405,10 +3545,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DeclareToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 150:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1022
+		//line php7/php7.y:1216
 		{
 			yyVAL.node = stmt.NewNop()
 
@@ -3417,10 +3559,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 151:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:1032
+		//line php7/php7.y:1228
 		{
 			if yyDollar[6].node == nil {
 				yyVAL.node = stmt.NewTry(yyDollar[3].list, yyDollar[5].list, yyDollar[6].node)
@@ -3434,10 +3578,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.TryToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 152:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1047
+		//line php7/php7.y:1245
 		{
 			yyVAL.node = stmt.NewThrow(yyDollar[2].node)
 
@@ -3447,10 +3593,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ThrowToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 153:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1058
+		//line php7/php7.y:1258
 		{
 			label := node.NewIdentifier(yyDollar[2].token.Value)
 			yyVAL.node = stmt.NewGoto(label)
@@ -3463,10 +3611,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.GotoToken)
 			yylex.(*Parser).comments.AddFromToken(label, yyDollar[2].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 154:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1072
+		//line php7/php7.y:1274
 		{
 			label := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.node = stmt.NewLabel(label)
@@ -3478,16 +3628,20 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(label, yyDollar[1].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 155:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1087
+		//line php7/php7.y:1291
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 156:
 		yyDollar = yyS[yypt-9 : yypt+1]
-		//line php7/php7.y:1089
+		//line php7/php7.y:1297
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[5].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -3506,31 +3660,39 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(catch, yyDollar[6].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(catch, yyDollar[7].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(catch, yyDollar[9].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 157:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1111
+		//line php7/php7.y:1321
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 158:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1113
+		//line php7/php7.y:1327
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.VerticalBarToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 159:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1123
+		//line php7/php7.y:1339
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 160:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1125
+		//line php7/php7.y:1345
 		{
 			yyVAL.node = stmt.NewFinally(yyDollar[3].list)
 
@@ -3541,31 +3703,39 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.FinallyToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 161:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1140
+		//line php7/php7.y:1362
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 162:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1142
+		//line php7/php7.y:1368
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 163:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1152
+		//line php7/php7.y:1380
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 164:
 		yyDollar = yyS[yypt-11 : yypt+1]
-		//line php7/php7.y:1157
+		//line php7/php7.y:1389
 		{
 			name := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = stmt.NewFunction(name, yyDollar[2].token != nil, yyDollar[6].list, yyDollar[8].node, yyDollar[10].list, yyDollar[4].str)
@@ -3584,34 +3754,36 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[9].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[11].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 165:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1181
+		//line php7/php7.y:1415
 		{
 			yyVAL.token = nil
 		}
 	case 166:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1183
+		//line php7/php7.y:1419
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 167:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1188
+		//line php7/php7.y:1426
 		{
 			yyVAL.token = nil
 		}
 	case 168:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1190
+		//line php7/php7.y:1430
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 169:
 		yyDollar = yyS[yypt-9 : yypt+1]
-		//line php7/php7.y:1195
+		//line php7/php7.y:1437
 		{
 			name := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = stmt.NewClass(name, yyDollar[1].list, nil, yyDollar[4].ClassExtends, yyDollar[5].ClassImplements, yyDollar[8].list, yyDollar[6].str)
@@ -3625,10 +3797,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[3].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[9].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 170:
 		yyDollar = yyS[yypt-8 : yypt+1]
-		//line php7/php7.y:1210
+		//line php7/php7.y:1454
 		{
 			name := node.NewIdentifier(yyDollar[2].token.Value)
 			yyVAL.node = stmt.NewClass(name, nil, nil, yyDollar[3].ClassExtends, yyDollar[4].ClassImplements, yyDollar[7].list, yyDollar[5].str)
@@ -3642,22 +3816,28 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[2].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[8].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 171:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1228
+		//line php7/php7.y:1474
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 172:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1230
+		//line php7/php7.y:1480
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 173:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1235
+		//line php7/php7.y:1489
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -3666,10 +3846,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.AbstractToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 174:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1245
+		//line php7/php7.y:1501
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -3678,10 +3860,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.FinalToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 175:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:1258
+		//line php7/php7.y:1516
 		{
 			name := node.NewIdentifier(yyDollar[2].token.Value)
 			yyVAL.node = stmt.NewTrait(name, yyDollar[5].list, yyDollar[3].str)
@@ -3695,10 +3879,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[2].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 176:
 		yyDollar = yyS[yypt-7 : yypt+1]
-		//line php7/php7.y:1276
+		//line php7/php7.y:1536
 		{
 			name := node.NewIdentifier(yyDollar[2].token.Value)
 			yyVAL.node = stmt.NewInterface(name, yyDollar[3].InterfaceExtends, yyDollar[6].list, yyDollar[4].str)
@@ -3712,16 +3898,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[2].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 177:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1294
+		//line php7/php7.y:1556
 		{
 			yyVAL.ClassExtends = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 178:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1296
+		//line php7/php7.y:1562
 		{
 			yyVAL.ClassExtends = stmt.NewClassExtends(yyDollar[2].node)
 
@@ -3730,16 +3920,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.ClassExtends, yyDollar[1].token, comment.ExtendsToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 179:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1309
+		//line php7/php7.y:1577
 		{
 			yyVAL.InterfaceExtends = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 180:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1311
+		//line php7/php7.y:1583
 		{
 			yyVAL.InterfaceExtends = stmt.NewInterfaceExtends(yyDollar[2].list)
 
@@ -3748,16 +3942,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.InterfaceExtends, yyDollar[1].token, comment.ExtendsToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 181:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1324
+		//line php7/php7.y:1598
 		{
 			yyVAL.ClassImplements = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 182:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1326
+		//line php7/php7.y:1604
 		{
 			yyVAL.ClassImplements = stmt.NewClassImplements(yyDollar[2].list)
 
@@ -3766,16 +3964,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.ClassImplements, yyDollar[1].token, comment.ImplementsToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 183:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1339
+		//line php7/php7.y:1619
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 184:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1343
+		//line php7/php7.y:1625
 		{
 			yyVAL.node = expr.NewReference(yyDollar[2].node)
 
@@ -3784,10 +3986,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 185:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1353
+		//line php7/php7.y:1637
 		{
 			yyVAL.node = expr.NewList(yyDollar[3].list)
 
@@ -3798,10 +4002,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ListToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 186:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1365
+		//line php7/php7.y:1651
 		{
 			yyVAL.node = expr.NewShortList(yyDollar[2].list)
 
@@ -3811,19 +4017,23 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 187:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1379
+		//line php7/php7.y:1667
 		{
 			yyVAL.node = stmt.NewFor(nil, nil, nil, yyDollar[1].node)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 188:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1386
+		//line php7/php7.y:1676
 		{
 			stmtList := stmt.NewStmtList(yyDollar[2].list)
 			yyVAL.node = stmt.NewAltFor(nil, nil, nil, stmtList)
@@ -3836,19 +4046,23 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.EndforToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 189:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1403
+		//line php7/php7.y:1695
 		{
 			yyVAL.node = stmt.NewForeach(nil, nil, nil, yyDollar[1].node)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 190:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1410
+		//line php7/php7.y:1704
 		{
 			stmtList := stmt.NewStmtList(yyDollar[2].list)
 			yyVAL.node = stmt.NewAltForeach(nil, nil, nil, stmtList)
@@ -3861,16 +4075,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.EndforeachToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 191:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1427
+		//line php7/php7.y:1723
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 192:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1429
+		//line php7/php7.y:1729
 		{
 			yyVAL.node = stmt.NewStmtList(yyDollar[2].list)
 
@@ -3881,10 +4099,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.EnddeclareToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 193:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1444
+		//line php7/php7.y:1746
 		{
 			caseList := stmt.NewCaseList(yyDollar[2].list)
 			yyVAL.node = stmt.NewSwitch(nil, caseList)
@@ -3896,10 +4116,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 194:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1457
+		//line php7/php7.y:1761
 		{
 			caseList := stmt.NewCaseList(yyDollar[3].list)
 			yyVAL.node = stmt.NewSwitch(nil, caseList)
@@ -3912,10 +4134,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[2].token, comment.SemiColonToken)
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 195:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1471
+		//line php7/php7.y:1777
 		{
 			caseList := stmt.NewCaseList(yyDollar[2].list)
 			yyVAL.node = stmt.NewAltSwitch(nil, caseList)
@@ -3928,10 +4152,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[1].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[3].token, comment.EndswitchToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 196:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php7/php7.y:1485
+		//line php7/php7.y:1793
 		{
 
 			caseList := stmt.NewCaseList(yyDollar[3].list)
@@ -3946,16 +4172,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[2].token, comment.SemiColonToken)
 			yylex.(*Parser).comments.AddFromToken(caseList, yyDollar[4].token, comment.EndswitchToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 197:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1504
+		//line php7/php7.y:1814
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 198:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php7/php7.y:1506
+		//line php7/php7.y:1820
 		{
 			_case := stmt.NewCase(yyDollar[3].node, yyDollar[5].list)
 			yyVAL.list = append(yyDollar[1].list, _case)
@@ -3966,10 +4196,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(_case, yyDollar[2].token, comment.CaseToken)
 			yylex.(*Parser).comments.AddFromToken(_case, yyDollar[4].token, comment.CaseSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 199:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1518
+		//line php7/php7.y:1834
 		{
 			_default := stmt.NewDefault(yyDollar[4].list)
 			yyVAL.list = append(yyDollar[1].list, _default)
@@ -3980,31 +4212,35 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(_default, yyDollar[2].token, comment.DefaultToken)
 			yylex.(*Parser).comments.AddFromToken(_default, yyDollar[3].token, comment.CaseSeparatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 200:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1533
+		//line php7/php7.y:1851
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 201:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1535
+		//line php7/php7.y:1855
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 202:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1540
+		//line php7/php7.y:1862
 		{
 			yyVAL.node = stmt.NewWhile(nil, yyDollar[1].node)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 203:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1547
+		//line php7/php7.y:1871
 		{
 			stmtList := stmt.NewStmtList(yyDollar[2].list)
 			yyVAL.node = stmt.NewAltWhile(nil, stmtList)
@@ -4017,10 +4253,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.EndwhileToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 204:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php7/php7.y:1564
+		//line php7/php7.y:1890
 		{
 			yyVAL.node = stmt.NewIf(yyDollar[3].node, yyDollar[5].node, nil, nil)
 
@@ -4031,10 +4269,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IfToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 205:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:1576
+		//line php7/php7.y:1904
 		{
 			_elseIf := stmt.NewElseIf(yyDollar[4].node, yyDollar[6].node)
 			yyVAL.node = yyDollar[1].node.(*stmt.If).AddElseIf(_elseIf)
@@ -4047,16 +4287,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(_elseIf, yyDollar[2].token, comment.ElseifToken)
 			yylex.(*Parser).comments.AddFromToken(_elseIf, yyDollar[3].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(_elseIf, yyDollar[5].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 206:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1593
+		//line php7/php7.y:1923
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 207:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1595
+		//line php7/php7.y:1929
 		{
 			_else := stmt.NewElse(yyDollar[3].node)
 			yyVAL.node = yyDollar[1].node.(*stmt.If).SetElse(_else)
@@ -4067,10 +4311,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ElseToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 208:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:1610
+		//line php7/php7.y:1946
 		{
 			stmts := stmt.NewStmtList(yyDollar[6].list)
 			yyVAL.node = stmt.NewAltIf(yyDollar[3].node, stmts, nil, nil)
@@ -4084,10 +4330,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 209:
 		yyDollar = yyS[yypt-7 : yypt+1]
-		//line php7/php7.y:1625
+		//line php7/php7.y:1963
 		{
 			stmts := stmt.NewStmtList(yyDollar[7].list)
 			_elseIf := stmt.NewAltElseIf(yyDollar[4].node, stmts)
@@ -4102,10 +4350,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(_elseIf, yyDollar[3].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(_elseIf, yyDollar[5].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(_elseIf, yyDollar[6].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 210:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1644
+		//line php7/php7.y:1984
 		{
 			yyVAL.node = yyDollar[1].node
 
@@ -4115,10 +4365,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.EndifToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 211:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:1655
+		//line php7/php7.y:1997
 		{
 			stmts := stmt.NewStmtList(yyDollar[4].list)
 			_else := stmt.NewAltElse(stmts)
@@ -4134,37 +4386,47 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(_else, yyDollar[3].token, comment.ColonToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.EndifToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 212:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1675
+		//line php7/php7.y:2019
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 213:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1677
+		//line php7/php7.y:2025
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 214:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1682
+		//line php7/php7.y:2034
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 215:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1684
+		//line php7/php7.y:2040
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 216:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1694
+		//line php7/php7.y:2052
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[4].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4191,10 +4453,12 @@ yydefault:
 				yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.EllipsisToken)
 			}
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[4].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 217:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:1722
+		//line php7/php7.y:2082
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[4].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4222,28 +4486,36 @@ yydefault:
 			}
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[4].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 218:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1754
+		//line php7/php7.y:2116
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 219:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1756
+		//line php7/php7.y:2122
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 220:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1761
+		//line php7/php7.y:2131
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 221:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1763
+		//line php7/php7.y:2137
 		{
 			yyVAL.node = node.NewNullable(yyDollar[2].node)
 
@@ -4252,10 +4524,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.QuestionMarkToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 222:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1776
+		//line php7/php7.y:2152
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4264,10 +4538,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ArrayToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 223:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1786
+		//line php7/php7.y:2164
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4276,31 +4552,39 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.CallableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 224:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1796
+		//line php7/php7.y:2176
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 225:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1801
+		//line php7/php7.y:2185
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 226:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1803
+		//line php7/php7.y:2191
 		{
 			yyVAL.node = yyDollar[2].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 227:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1813
+		//line php7/php7.y:2203
 		{
 			yyVAL.node = node.NewArgumentList(nil)
 
@@ -4310,10 +4594,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 228:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1824
+		//line php7/php7.y:2216
 		{
 			yyVAL.node = node.NewArgumentList(yyDollar[2].list)
 
@@ -4326,34 +4612,42 @@ yydefault:
 				yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CommaToken)
 			}
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 229:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1841
+		//line php7/php7.y:2235
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 230:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1843
+		//line php7/php7.y:2241
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 231:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1853
+		//line php7/php7.y:2253
 		{
 			yyVAL.node = node.NewArgument(yyDollar[1].node, false, false)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 232:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1860
+		//line php7/php7.y:2262
 		{
 			yyVAL.node = node.NewArgument(yyDollar[2].node, true, false)
 
@@ -4362,46 +4656,58 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.EllipsisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 233:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1873
+		//line php7/php7.y:2277
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 234:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1880
+		//line php7/php7.y:2286
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 235:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1885
+		//line php7/php7.y:2295
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 236:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1890
+		//line php7/php7.y:2304
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 237:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1897
+		//line php7/php7.y:2313
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 238:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:1902
+		//line php7/php7.y:2322
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4414,10 +4720,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 239:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1916
+		//line php7/php7.y:2338
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4431,22 +4739,28 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 240:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:1934
+		//line php7/php7.y:2358
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 241:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:1936
+		//line php7/php7.y:2364
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 242:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1941
+		//line php7/php7.y:2373
 		{
 			yyVAL.node = stmt.NewPropertyList(yyDollar[1].list, yyDollar[2].list)
 
@@ -4455,10 +4769,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 243:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:1951
+		//line php7/php7.y:2385
 		{
 			yyVAL.node = stmt.NewClassConstList(yyDollar[1].list, yyDollar[3].list)
 
@@ -4468,10 +4784,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ConstToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 244:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:1962
+		//line php7/php7.y:2398
 		{
 			var adaptationList *stmt.TraitAdaptationList
 
@@ -4490,10 +4808,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UseToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 245:
 		yyDollar = yyS[yypt-10 : yypt+1]
-		//line php7/php7.y:1982
+		//line php7/php7.y:2420
 		{
 			name := node.NewIdentifier(yyDollar[4].token.Value)
 			yyVAL.node = stmt.NewClassMethod(name, yyDollar[1].list, yyDollar[3].token != nil, yyDollar[7].list, yyDollar[9].node, yyDollar[10].node, yyDollar[5].str)
@@ -4514,25 +4834,31 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[4].token, comment.IdentifierToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[8].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 246:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2007
+		//line php7/php7.y:2447
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 247:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2009
+		//line php7/php7.y:2453
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 248:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2019
+		//line php7/php7.y:2465
 		{
 			yyVAL.node = stmt.NewNop()
 
@@ -4541,10 +4867,11 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.SemiColonToken)
 
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 249:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2029
+		//line php7/php7.y:2477
 		{
 			yyVAL.node = stmt.NewTraitAdaptationList(nil)
 
@@ -4553,10 +4880,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 250:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2039
+		//line php7/php7.y:2489
 		{
 			yyVAL.node = stmt.NewTraitAdaptationList(yyDollar[2].list)
 
@@ -4565,40 +4894,50 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 251:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2052
+		//line php7/php7.y:2504
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 252:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2054
+		//line php7/php7.y:2510
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 253:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2059
+		//line php7/php7.y:2519
 		{
 			yyVAL.node = yyDollar[1].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 254:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2066
+		//line php7/php7.y:2528
 		{
 			yyVAL.node = yyDollar[1].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 255:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2076
+		//line php7/php7.y:2540
 		{
 			yyVAL.node = stmt.NewTraitUsePrecedence(yyDollar[1].node, yyDollar[3].list)
 
@@ -4607,10 +4946,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.InsteadofToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 256:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2089
+		//line php7/php7.y:2555
 		{
 			alias := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = stmt.NewTraitUseAlias(yyDollar[1].node, nil, alias)
@@ -4622,10 +4963,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(alias, yyDollar[3].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 257:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2102
+		//line php7/php7.y:2570
 		{
 			alias := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = stmt.NewTraitUseAlias(yyDollar[1].node, nil, alias)
@@ -4637,10 +4980,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(alias, yyDollar[3].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 258:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:2115
+		//line php7/php7.y:2585
 		{
 			alias := node.NewIdentifier(yyDollar[4].token.Value)
 			yyVAL.node = stmt.NewTraitUseAlias(yyDollar[1].node, yyDollar[3].node, alias)
@@ -4652,10 +4997,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
 			yylex.(*Parser).comments.AddFromToken(alias, yyDollar[4].token, comment.IdentifierToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 259:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2128
+		//line php7/php7.y:2600
 		{
 			yyVAL.node = stmt.NewTraitUseAlias(yyDollar[1].node, yyDollar[3].node, nil)
 
@@ -4664,10 +5011,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 260:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2141
+		//line php7/php7.y:2615
 		{
 			name := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.node = stmt.NewTraitMethodRef(nil, name)
@@ -4678,16 +5027,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[1].token, comment.IdentifierToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 261:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2153
+		//line php7/php7.y:2629
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 262:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2158
+		//line php7/php7.y:2638
 		{
 			target := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = stmt.NewTraitMethodRef(yyDollar[1].node, target)
@@ -4699,10 +5052,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
 			yylex.(*Parser).comments.AddFromToken(target, yyDollar[3].token, comment.IdentifierToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 263:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2174
+		//line php7/php7.y:2656
 		{
 			yyVAL.node = stmt.NewNop()
 
@@ -4711,10 +5066,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.SemiColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 264:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2184
+		//line php7/php7.y:2668
 		{
 			yyVAL.node = stmt.NewStmtList(yyDollar[2].list)
 
@@ -4724,16 +5081,20 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 265:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2198
+		//line php7/php7.y:2684
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 266:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2200
+		//line php7/php7.y:2690
 		{
 			modifier := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.list = []node.Node{modifier}
@@ -4743,34 +5104,44 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(modifier, yyDollar[1].token, comment.VarToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 267:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:2214
+		//line php7/php7.y:2706
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 268:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2216
+		//line php7/php7.y:2712
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 269:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2221
+		//line php7/php7.y:2721
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 270:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2223
+		//line php7/php7.y:2727
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 271:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2228
+		//line php7/php7.y:2736
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4779,10 +5150,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.PublicToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 272:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2238
+		//line php7/php7.y:2748
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4791,10 +5164,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ProtectedToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 273:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2248
+		//line php7/php7.y:2760
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4803,10 +5178,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.PrivateToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 274:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2258
+		//line php7/php7.y:2772
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4815,10 +5192,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StaticToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 275:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2268
+		//line php7/php7.y:2784
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4827,10 +5206,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.AbstractToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 276:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2278
+		//line php7/php7.y:2796
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -4839,25 +5220,31 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.FinalToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 277:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2291
+		//line php7/php7.y:2811
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 278:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2298
+		//line php7/php7.y:2820
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 279:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2303
+		//line php7/php7.y:2829
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4870,10 +5257,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 280:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:2317
+		//line php7/php7.y:2845
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -4887,25 +5276,31 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 281:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2335
+		//line php7/php7.y:2865
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 282:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2342
+		//line php7/php7.y:2874
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 283:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:2347
+		//line php7/php7.y:2883
 		{
 			name := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.node = stmt.NewConstant(name, yyDollar[3].node, yyDollar[4].str)
@@ -4917,10 +5312,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[1].token, comment.IdentifierToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 284:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:2363
+		//line php7/php7.y:2901
 		{
 			name := node.NewIdentifier(yyDollar[1].token.Value)
 			yyVAL.node = stmt.NewConstant(name, yyDollar[3].node, yyDollar[4].str)
@@ -4932,58 +5329,74 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[1].token, comment.StringToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 285:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2379
+		//line php7/php7.y:2919
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 286:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2386
+		//line php7/php7.y:2928
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 287:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2391
+		//line php7/php7.y:2937
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 288:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:2396
+		//line php7/php7.y:2946
 		{
 			yyVAL.list = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 289:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2398
+		//line php7/php7.y:2952
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 290:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2403
+		//line php7/php7.y:2961
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 291:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2410
+		//line php7/php7.y:2970
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 292:
 		yyDollar = yyS[yypt-8 : yypt+1]
-		//line php7/php7.y:2415
+		//line php7/php7.y:2979
 		{
 			if yyDollar[2].node != nil {
 				yyVAL.node = stmt.NewClass(nil, nil, yyDollar[2].node.(*node.ArgumentList), yyDollar[3].ClassExtends, yyDollar[4].ClassImplements, yyDollar[7].list, yyDollar[5].str)
@@ -4998,10 +5411,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ClassToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[8].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 293:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2434
+		//line php7/php7.y:3000
 		{
 			if yyDollar[3].node != nil {
 				yyVAL.node = expr.NewNew(yyDollar[2].node, yyDollar[3].node.(*node.ArgumentList))
@@ -5013,10 +5428,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NewToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 294:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2447
+		//line php7/php7.y:3015
 		{
 			yyVAL.node = expr.NewNew(yyDollar[2].node, nil)
 
@@ -5025,10 +5442,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NewToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 295:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:2460
+		//line php7/php7.y:3030
 		{
 			list := expr.NewList(yyDollar[3].list)
 			yyVAL.node = assign.NewAssign(list, yyDollar[6].node)
@@ -5042,10 +5461,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(list, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(list, yyDollar[4].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 296:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php7/php7.y:2475
+		//line php7/php7.y:3047
 		{
 			shortList := expr.NewShortList(yyDollar[2].list)
 			yyVAL.node = assign.NewAssign(shortList, yyDollar[5].node)
@@ -5058,10 +5479,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(shortList, yyDollar[1].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(shortList, yyDollar[3].token, comment.CloseSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 297:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2489
+		//line php7/php7.y:3063
 		{
 			yyVAL.node = assign.NewAssign(yyDollar[1].node, yyDollar[3].node)
 
@@ -5070,10 +5493,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.EqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 298:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:2499
+		//line php7/php7.y:3075
 		{
 			yyVAL.node = assign.NewReference(yyDollar[1].node, yyDollar[4].node)
 
@@ -5083,10 +5508,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.EqualToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 299:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2510
+		//line php7/php7.y:3088
 		{
 			yyVAL.node = expr.NewClone(yyDollar[2].node)
 
@@ -5095,10 +5522,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.CloneToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 300:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2520
+		//line php7/php7.y:3100
 		{
 			yyVAL.node = assign.NewPlus(yyDollar[1].node, yyDollar[3].node)
 
@@ -5107,10 +5536,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PlusEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 301:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2530
+		//line php7/php7.y:3112
 		{
 			yyVAL.node = assign.NewMinus(yyDollar[1].node, yyDollar[3].node)
 
@@ -5119,10 +5550,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.MinusEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 302:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2540
+		//line php7/php7.y:3124
 		{
 			yyVAL.node = assign.NewMul(yyDollar[1].node, yyDollar[3].node)
 
@@ -5131,10 +5564,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.MulEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 303:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2550
+		//line php7/php7.y:3136
 		{
 			yyVAL.node = assign.NewPow(yyDollar[1].node, yyDollar[3].node)
 
@@ -5143,10 +5578,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PowEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 304:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2560
+		//line php7/php7.y:3148
 		{
 			yyVAL.node = assign.NewDiv(yyDollar[1].node, yyDollar[3].node)
 
@@ -5155,10 +5592,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.DivEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 305:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2570
+		//line php7/php7.y:3160
 		{
 			yyVAL.node = assign.NewConcat(yyDollar[1].node, yyDollar[3].node)
 
@@ -5167,10 +5606,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ConcatEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 306:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2580
+		//line php7/php7.y:3172
 		{
 			yyVAL.node = assign.NewMod(yyDollar[1].node, yyDollar[3].node)
 
@@ -5179,10 +5620,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ModEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 307:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2590
+		//line php7/php7.y:3184
 		{
 			yyVAL.node = assign.NewBitwiseAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -5191,10 +5634,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AndEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 308:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2600
+		//line php7/php7.y:3196
 		{
 			yyVAL.node = assign.NewBitwiseOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -5203,10 +5648,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OrEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 309:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2610
+		//line php7/php7.y:3208
 		{
 			yyVAL.node = assign.NewBitwiseXor(yyDollar[1].node, yyDollar[3].node)
 
@@ -5215,10 +5662,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.XorEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 310:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2620
+		//line php7/php7.y:3220
 		{
 			yyVAL.node = assign.NewShiftLeft(yyDollar[1].node, yyDollar[3].node)
 
@@ -5227,10 +5676,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SlEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 311:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2630
+		//line php7/php7.y:3232
 		{
 			yyVAL.node = assign.NewShiftRight(yyDollar[1].node, yyDollar[3].node)
 
@@ -5239,10 +5690,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SrEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 312:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2640
+		//line php7/php7.y:3244
 		{
 			yyVAL.node = expr.NewPostInc(yyDollar[1].node)
 
@@ -5251,10 +5704,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IncToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 313:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2650
+		//line php7/php7.y:3256
 		{
 			yyVAL.node = expr.NewPreInc(yyDollar[2].node)
 
@@ -5263,10 +5718,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IncToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 314:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2660
+		//line php7/php7.y:3268
 		{
 			yyVAL.node = expr.NewPostDec(yyDollar[1].node)
 
@@ -5275,10 +5732,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.DecToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 315:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2670
+		//line php7/php7.y:3280
 		{
 			yyVAL.node = expr.NewPreDec(yyDollar[2].node)
 
@@ -5287,10 +5746,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DecToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 316:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2680
+		//line php7/php7.y:3292
 		{
 			yyVAL.node = binary.NewBooleanOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -5299,10 +5760,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.BooleanOrToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 317:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2690
+		//line php7/php7.y:3304
 		{
 			yyVAL.node = binary.NewBooleanAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -5311,10 +5774,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.BooleanAndToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 318:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2700
+		//line php7/php7.y:3316
 		{
 			yyVAL.node = binary.NewLogicalOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -5323,10 +5788,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LogicalOrToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 319:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2710
+		//line php7/php7.y:3328
 		{
 			yyVAL.node = binary.NewLogicalAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -5335,10 +5802,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LogicalAndToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 320:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2720
+		//line php7/php7.y:3340
 		{
 			yyVAL.node = binary.NewLogicalXor(yyDollar[1].node, yyDollar[3].node)
 
@@ -5347,10 +5816,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LogicalXorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 321:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2730
+		//line php7/php7.y:3352
 		{
 			yyVAL.node = binary.NewBitwiseOr(yyDollar[1].node, yyDollar[3].node)
 
@@ -5359,10 +5830,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.VerticalBarToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 322:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2740
+		//line php7/php7.y:3364
 		{
 			yyVAL.node = binary.NewBitwiseAnd(yyDollar[1].node, yyDollar[3].node)
 
@@ -5371,10 +5844,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 323:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2750
+		//line php7/php7.y:3376
 		{
 			yyVAL.node = binary.NewBitwiseXor(yyDollar[1].node, yyDollar[3].node)
 
@@ -5383,10 +5858,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.CaretToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 324:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2760
+		//line php7/php7.y:3388
 		{
 			yyVAL.node = binary.NewConcat(yyDollar[1].node, yyDollar[3].node)
 
@@ -5395,10 +5872,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.DotToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 325:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2770
+		//line php7/php7.y:3400
 		{
 			yyVAL.node = binary.NewPlus(yyDollar[1].node, yyDollar[3].node)
 
@@ -5407,10 +5886,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PlusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 326:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2780
+		//line php7/php7.y:3412
 		{
 			yyVAL.node = binary.NewMinus(yyDollar[1].node, yyDollar[3].node)
 
@@ -5419,10 +5900,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.MinusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 327:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2790
+		//line php7/php7.y:3424
 		{
 			yyVAL.node = binary.NewMul(yyDollar[1].node, yyDollar[3].node)
 
@@ -5431,10 +5914,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.AsteriskToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 328:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2800
+		//line php7/php7.y:3436
 		{
 			yyVAL.node = binary.NewPow(yyDollar[1].node, yyDollar[3].node)
 
@@ -5443,10 +5928,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 329:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2810
+		//line php7/php7.y:3448
 		{
 			yyVAL.node = binary.NewDiv(yyDollar[1].node, yyDollar[3].node)
 
@@ -5455,10 +5942,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SlashToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 330:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2820
+		//line php7/php7.y:3460
 		{
 			yyVAL.node = binary.NewMod(yyDollar[1].node, yyDollar[3].node)
 
@@ -5467,10 +5956,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PercentToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 331:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2830
+		//line php7/php7.y:3472
 		{
 			yyVAL.node = binary.NewShiftLeft(yyDollar[1].node, yyDollar[3].node)
 
@@ -5479,10 +5970,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SlToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 332:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2840
+		//line php7/php7.y:3484
 		{
 			yyVAL.node = binary.NewShiftRight(yyDollar[1].node, yyDollar[3].node)
 
@@ -5491,10 +5984,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SrToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 333:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2850
+		//line php7/php7.y:3496
 		{
 			yyVAL.node = expr.NewUnaryPlus(yyDollar[2].node)
 
@@ -5503,10 +5998,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.PlusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 334:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2860
+		//line php7/php7.y:3508
 		{
 			yyVAL.node = expr.NewUnaryMinus(yyDollar[2].node)
 
@@ -5515,10 +6012,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.MinusToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 335:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2870
+		//line php7/php7.y:3520
 		{
 			yyVAL.node = expr.NewBooleanNot(yyDollar[2].node)
 
@@ -5527,10 +6026,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ExclamationMarkToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 336:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:2880
+		//line php7/php7.y:3532
 		{
 			yyVAL.node = expr.NewBitwiseNot(yyDollar[2].node)
 
@@ -5539,10 +6040,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.TildeToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 337:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2890
+		//line php7/php7.y:3544
 		{
 			yyVAL.node = binary.NewIdentical(yyDollar[1].node, yyDollar[3].node)
 
@@ -5551,10 +6054,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsIdenticalToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 338:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2900
+		//line php7/php7.y:3556
 		{
 			yyVAL.node = binary.NewNotIdentical(yyDollar[1].node, yyDollar[3].node)
 
@@ -5563,10 +6068,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsNotIdenticalToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 339:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2910
+		//line php7/php7.y:3568
 		{
 			yyVAL.node = binary.NewEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -5575,10 +6082,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 340:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2920
+		//line php7/php7.y:3580
 		{
 			yyVAL.node = binary.NewNotEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -5587,10 +6096,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsNotEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 341:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2930
+		//line php7/php7.y:3592
 		{
 			yyVAL.node = binary.NewSmaller(yyDollar[1].node, yyDollar[3].node)
 
@@ -5599,10 +6110,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.LessToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 342:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2940
+		//line php7/php7.y:3604
 		{
 			yyVAL.node = binary.NewSmallerOrEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -5611,10 +6124,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsSmallerOrEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 343:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2950
+		//line php7/php7.y:3616
 		{
 			yyVAL.node = binary.NewGreater(yyDollar[1].node, yyDollar[3].node)
 
@@ -5623,10 +6138,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.GreaterToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 344:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2960
+		//line php7/php7.y:3628
 		{
 			yyVAL.node = binary.NewGreaterOrEqual(yyDollar[1].node, yyDollar[3].node)
 
@@ -5635,10 +6152,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.IsGreaterOrEqualToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 345:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2970
+		//line php7/php7.y:3640
 		{
 			yyVAL.node = binary.NewSpaceship(yyDollar[1].node, yyDollar[3].node)
 
@@ -5647,10 +6166,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.SpaceshipToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 346:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2980
+		//line php7/php7.y:3652
 		{
 			yyVAL.node = expr.NewInstanceOf(yyDollar[1].node, yyDollar[3].node)
 
@@ -5659,26 +6180,32 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.InstanceofToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 347:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:2990
+		//line php7/php7.y:3664
 		{
 			yyVAL.node = yyDollar[2].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 348:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:2998
+		//line php7/php7.y:3674
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 349:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php7/php7.y:3000
+		//line php7/php7.y:3680
 		{
 			yyVAL.node = expr.NewTernary(yyDollar[1].node, yyDollar[3].node, yyDollar[5].node)
 
@@ -5688,10 +6215,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.QuestionMarkToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 350:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3011
+		//line php7/php7.y:3693
 		{
 			yyVAL.node = expr.NewTernary(yyDollar[1].node, nil, yyDollar[4].node)
 
@@ -5701,10 +6230,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.QuestionMarkToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.ColonToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 351:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3022
+		//line php7/php7.y:3706
 		{
 			yyVAL.node = binary.NewCoalesce(yyDollar[1].node, yyDollar[3].node)
 
@@ -5713,16 +6244,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.CoalesceToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 352:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3032
+		//line php7/php7.y:3718
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 353:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3034
+		//line php7/php7.y:3724
 		{
 			yyVAL.node = cast.NewInt(yyDollar[2].node)
 
@@ -5731,10 +6266,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IntCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 354:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3044
+		//line php7/php7.y:3736
 		{
 			yyVAL.node = cast.NewDouble(yyDollar[2].node)
 
@@ -5743,10 +6280,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DoubleCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 355:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3054
+		//line php7/php7.y:3748
 		{
 			yyVAL.node = cast.NewString(yyDollar[2].node)
 
@@ -5755,10 +6294,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StringCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 356:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3064
+		//line php7/php7.y:3760
 		{
 			yyVAL.node = cast.NewArray(yyDollar[2].node)
 
@@ -5767,10 +6308,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ArrayCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 357:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3074
+		//line php7/php7.y:3772
 		{
 			yyVAL.node = cast.NewObject(yyDollar[2].node)
 
@@ -5779,10 +6322,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ObjectCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 358:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3084
+		//line php7/php7.y:3784
 		{
 			yyVAL.node = cast.NewBool(yyDollar[2].node)
 
@@ -5791,10 +6336,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.BoolCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 359:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3094
+		//line php7/php7.y:3796
 		{
 			yyVAL.node = cast.NewUnset(yyDollar[2].node)
 
@@ -5803,10 +6350,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.UnsetCastToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 360:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3104
+		//line php7/php7.y:3808
 		{
 			if strings.EqualFold(yyDollar[1].token.Value, "die") {
 				yyVAL.node = expr.NewDie(nil)
@@ -5833,10 +6382,12 @@ yydefault:
 			if yyDollar[2].node != nil {
 				yylex.(*Parser).comments.AddFromChildNode(yyVAL.node, yyDollar[2].node)
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 361:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3132
+		//line php7/php7.y:3838
 		{
 			yyVAL.node = expr.NewErrorSuppress(yyDollar[2].node)
 
@@ -5845,16 +6396,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.AtToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 362:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3142
+		//line php7/php7.y:3850
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 363:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3144
+		//line php7/php7.y:3856
 		{
 			yyVAL.node = expr.NewShellExec(yyDollar[2].list)
 
@@ -5864,10 +6419,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.BackquoteToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.BackquoteToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 364:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3155
+		//line php7/php7.y:3869
 		{
 			yyVAL.node = expr.NewPrint(yyDollar[2].node)
 
@@ -5876,10 +6433,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.PrintToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 365:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3165
+		//line php7/php7.y:3881
 		{
 			yyVAL.node = expr.NewYield(nil, nil)
 
@@ -5888,10 +6447,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.YieldToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 366:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3175
+		//line php7/php7.y:3893
 		{
 			yyVAL.node = expr.NewYield(nil, yyDollar[2].node)
 
@@ -5900,10 +6461,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.YieldToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 367:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3185
+		//line php7/php7.y:3905
 		{
 			yyVAL.node = expr.NewYield(yyDollar[2].node, yyDollar[4].node)
 
@@ -5913,10 +6476,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.YieldToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.DoubleArrowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 368:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3196
+		//line php7/php7.y:3918
 		{
 			yyVAL.node = expr.NewYieldFrom(yyDollar[2].node)
 
@@ -5925,10 +6490,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.YieldFromToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 369:
 		yyDollar = yyS[yypt-11 : yypt+1]
-		//line php7/php7.y:3206
+		//line php7/php7.y:3930
 		{
 			yyVAL.node = expr.NewClosure(yyDollar[5].list, yyDollar[7].ClosureUse, yyDollar[8].node, yyDollar[10].list, false, yyDollar[2].token != nil, yyDollar[3].str)
 
@@ -5944,10 +6511,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[9].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[11].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 370:
 		yyDollar = yyS[yypt-12 : yypt+1]
-		//line php7/php7.y:3223
+		//line php7/php7.y:3949
 		{
 			yyVAL.node = expr.NewClosure(yyDollar[6].list, yyDollar[8].ClosureUse, yyDollar[9].node, yyDollar[11].list, true, yyDollar[3].token != nil, yyDollar[4].str)
 
@@ -5964,35 +6533,41 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[7].token, comment.CloseParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[10].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[12].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 371:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:3244
+		//line php7/php7.y:3972
 		{
 			yyVAL.str = yylex.(*Parser).PhpDocComment
 			yylex.(*Parser).PhpDocComment = ""
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 372:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:3252
+		//line php7/php7.y:3982
 		{
 			yyVAL.token = nil
 		}
 	case 373:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3254
+		//line php7/php7.y:3986
 		{
 			yyVAL.token = yyDollar[1].token
 		}
 	case 374:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:3259
+		//line php7/php7.y:3993
 		{
 			yyVAL.ClosureUse = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 375:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3261
+		//line php7/php7.y:3999
 		{
 			yyVAL.ClosureUse = expr.NewClosureUse(yyDollar[3].list)
 
@@ -6003,25 +6578,31 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.ClosureUse, yyDollar[1].token, comment.UseToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.ClosureUse, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.ClosureUse, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 376:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3276
+		//line php7/php7.y:4016
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 377:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3283
+		//line php7/php7.y:4025
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 378:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3288
+		//line php7/php7.y:4034
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			yyVAL.node = expr.NewVariable(identifier)
@@ -6032,10 +6613,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 379:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3300
+		//line php7/php7.y:4048
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[2].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -6049,19 +6632,23 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.AmpersandToken)
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[2].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 380:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3318
+		//line php7/php7.y:4068
 		{
 			yyVAL.node = expr.NewFunctionCall(yyDollar[1].node, yyDollar[2].node.(*node.ArgumentList))
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodesPosition(yyDollar[1].node, yyDollar[2].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 381:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3325
+		//line php7/php7.y:4077
 		{
 			yyVAL.node = expr.NewStaticCall(yyDollar[1].node, yyDollar[3].node, yyDollar[4].node.(*node.ArgumentList))
 
@@ -6070,10 +6657,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 382:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3335
+		//line php7/php7.y:4089
 		{
 			yyVAL.node = expr.NewStaticCall(yyDollar[1].node, yyDollar[3].node, yyDollar[4].node.(*node.ArgumentList))
 
@@ -6082,19 +6671,23 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 383:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3345
+		//line php7/php7.y:4101
 		{
 			yyVAL.node = expr.NewFunctionCall(yyDollar[1].node, yyDollar[2].node.(*node.ArgumentList))
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodesPosition(yyDollar[1].node, yyDollar[2].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 384:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3355
+		//line php7/php7.y:4113
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -6103,34 +6696,44 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StaticToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 385:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3365
+		//line php7/php7.y:4125
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 386:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3370
+		//line php7/php7.y:4134
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 387:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3372
+		//line php7/php7.y:4140
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 388:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:3377
+		//line php7/php7.y:4149
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 389:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3379
+		//line php7/php7.y:4155
 		{
 			yyVAL.node = expr.NewExit(yyDollar[2].node)
 
@@ -6140,40 +6743,52 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 390:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:3393
+		//line php7/php7.y:4171
 		{
 			yyVAL.list = []node.Node{}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 391:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3395
+		//line php7/php7.y:4177
 		{
 			yyVAL.list = []node.Node{scalar.NewEncapsedStringPart(yyDollar[1].token.Value)}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 392:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3397
+		//line php7/php7.y:4183
 		{
 			yyVAL.list = yyDollar[1].list
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 393:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:3402
+		//line php7/php7.y:4192
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 394:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3404
+		//line php7/php7.y:4198
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 395:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3409
+		//line php7/php7.y:4207
 		{
 			yyVAL.node = expr.NewArray(yyDollar[3].list)
 
@@ -6184,10 +6799,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ArrayToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 396:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3421
+		//line php7/php7.y:4221
 		{
 			yyVAL.node = expr.NewShortArray(yyDollar[2].list)
 
@@ -6197,10 +6814,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 397:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3432
+		//line php7/php7.y:4234
 		{
 			yyVAL.node = scalar.NewString(yyDollar[1].token.Value)
 
@@ -6209,10 +6828,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ConstantEncapsedStringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 398:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3445
+		//line php7/php7.y:4249
 		{
 			yyVAL.node = scalar.NewLnumber(yyDollar[1].token.Value)
 
@@ -6221,10 +6842,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.LnumberToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 399:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3455
+		//line php7/php7.y:4261
 		{
 			yyVAL.node = scalar.NewDnumber(yyDollar[1].token.Value)
 
@@ -6233,10 +6856,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DnumberToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 400:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3465
+		//line php7/php7.y:4273
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6245,10 +6870,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.LineToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 401:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3475
+		//line php7/php7.y:4285
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6257,10 +6884,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.FileToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 402:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3485
+		//line php7/php7.y:4297
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6269,10 +6898,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DirToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 403:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3495
+		//line php7/php7.y:4309
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6281,10 +6912,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.TraitCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 404:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3505
+		//line php7/php7.y:4321
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6293,10 +6926,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.MethodCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 405:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3515
+		//line php7/php7.y:4333
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6305,10 +6940,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.FuncCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 406:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3525
+		//line php7/php7.y:4345
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6317,10 +6954,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NsCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 407:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3535
+		//line php7/php7.y:4357
 		{
 			yyVAL.node = scalar.NewMagicConstant(yyDollar[1].token.Value)
 
@@ -6329,10 +6968,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.ClassCToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 408:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3545
+		//line php7/php7.y:4369
 		{
 			encapsed := scalar.NewEncapsedStringPart(yyDollar[2].token.Value)
 			yyVAL.node = scalar.NewHeredoc(yyDollar[1].token.Value, []node.Node{encapsed})
@@ -6343,10 +6984,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StartHeredocToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 409:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3557
+		//line php7/php7.y:4383
 		{
 			yyVAL.node = scalar.NewHeredoc(yyDollar[1].token.Value, nil)
 
@@ -6355,10 +6998,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StartHeredocToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 410:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3567
+		//line php7/php7.y:4395
 		{
 			yyVAL.node = scalar.NewEncapsed(yyDollar[2].list)
 
@@ -6367,10 +7012,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DoubleQuoteToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 411:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3577
+		//line php7/php7.y:4407
 		{
 			yyVAL.node = scalar.NewHeredoc(yyDollar[1].token.Value, yyDollar[2].list)
 
@@ -6379,31 +7026,39 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StartHeredocToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 412:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3587
+		//line php7/php7.y:4419
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 413:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3589
+		//line php7/php7.y:4425
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 414:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3594
+		//line php7/php7.y:4434
 		{
 			yyVAL.node = expr.NewConstFetch(yyDollar[1].node)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 415:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3601
+		//line php7/php7.y:4443
 		{
 			target := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = expr.NewClassConstFetch(yyDollar[1].node, target)
@@ -6415,10 +7070,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
 			yylex.(*Parser).comments.AddFromToken(target, yyDollar[3].token, comment.IdentifierToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 416:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3614
+		//line php7/php7.y:4458
 		{
 			target := node.NewIdentifier(yyDollar[3].token.Value)
 			yyVAL.node = expr.NewClassConstFetch(yyDollar[1].node, target)
@@ -6430,90 +7087,116 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
 			yylex.(*Parser).comments.AddFromToken(target, yyDollar[3].token, comment.IdentifierToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 417:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3630
+		//line php7/php7.y:4476
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 418:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3632
+		//line php7/php7.y:4482
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 419:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:3637
+		//line php7/php7.y:4491
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 420:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3639
+		//line php7/php7.y:4497
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 421:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3644
+		//line php7/php7.y:4506
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 422:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3649
+		//line php7/php7.y:4515
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 423:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3651
+		//line php7/php7.y:4521
 		{
 			yyVAL.node = yyDollar[2].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 424:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3659
+		//line php7/php7.y:4531
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 425:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3664
+		//line php7/php7.y:4540
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 426:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3666
+		//line php7/php7.y:4546
 		{
 			yyVAL.node = yyDollar[2].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 427:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3674
+		//line php7/php7.y:4556
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 428:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3679
+		//line php7/php7.y:4565
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 429:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3681
+		//line php7/php7.y:4571
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6523,10 +7206,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 430:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3692
+		//line php7/php7.y:4584
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6536,10 +7221,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 431:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3703
+		//line php7/php7.y:4597
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6549,10 +7236,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 432:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3714
+		//line php7/php7.y:4610
 		{
 			yyVAL.node = expr.NewMethodCall(yyDollar[1].node, yyDollar[3].node, yyDollar[4].node.(*node.ArgumentList))
 
@@ -6561,28 +7250,36 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ObjectOperatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 433:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3724
+		//line php7/php7.y:4622
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 434:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3729
+		//line php7/php7.y:4631
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 435:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3731
+		//line php7/php7.y:4637
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 436:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3733
+		//line php7/php7.y:4643
 		{
 			yyVAL.node = expr.NewPropertyFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6591,10 +7288,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ObjectOperatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 437:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3746
+		//line php7/php7.y:4658
 		{
 			name := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			yyVAL.node = expr.NewVariable(name)
@@ -6605,10 +7304,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 438:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3758
+		//line php7/php7.y:4672
 		{
 			yyVAL.node = expr.NewVariable(yyDollar[3].node)
 
@@ -6619,10 +7320,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DollarToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 439:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3770
+		//line php7/php7.y:4686
 		{
 			yyVAL.node = expr.NewVariable(yyDollar[2].node)
 
@@ -6631,10 +7334,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DollarToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 440:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3783
+		//line php7/php7.y:4701
 		{
 			yyVAL.node = expr.NewStaticPropertyFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6643,10 +7348,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 441:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3793
+		//line php7/php7.y:4713
 		{
 			yyVAL.node = expr.NewStaticPropertyFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6655,16 +7362,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 442:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3806
+		//line php7/php7.y:4728
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 443:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3808
+		//line php7/php7.y:4734
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6674,10 +7385,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 444:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3819
+		//line php7/php7.y:4747
 		{
 			yyVAL.node = expr.NewArrayDimFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6687,10 +7400,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 445:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3830
+		//line php7/php7.y:4760
 		{
 			yyVAL.node = expr.NewPropertyFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6699,10 +7414,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ObjectOperatorToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 446:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3840
+		//line php7/php7.y:4772
 		{
 			yyVAL.node = expr.NewStaticPropertyFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6711,10 +7428,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 447:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3850
+		//line php7/php7.y:4784
 		{
 			yyVAL.node = expr.NewStaticPropertyFetch(yyDollar[1].node, yyDollar[3].node)
 
@@ -6723,10 +7442,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.PaamayimNekudotayimToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 448:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3863
+		//line php7/php7.y:4799
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -6735,26 +7456,32 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IdentifierToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 449:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3873
+		//line php7/php7.y:4811
 		{
 			yyVAL.node = yyDollar[2].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 450:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3881
+		//line php7/php7.y:4821
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 451:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3886
+		//line php7/php7.y:4830
 		{
 			yyVAL.node = node.NewIdentifier(yyDollar[1].token.Value)
 
@@ -6763,63 +7490,79 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 452:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3896
+		//line php7/php7.y:4842
 		{
 			yyVAL.node = yyDollar[2].node
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.OpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 453:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3904
+		//line php7/php7.y:4852
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 454:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3909
+		//line php7/php7.y:4861
 		{
 			if yyDollar[1].list[len(yyDollar[1].list)-1] == nil {
 				yyVAL.list = yyDollar[1].list[:len(yyDollar[1].list)-1]
 			} else {
 				yyVAL.list = yyDollar[1].list
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 455:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line php7/php7.y:3920
+		//line php7/php7.y:4874
 		{
 			yyVAL.node = nil
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 456:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3922
+		//line php7/php7.y:4880
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 457:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3927
+		//line php7/php7.y:4889
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 458:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3934
+		//line php7/php7.y:4898
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 459:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:3939
+		//line php7/php7.y:4907
 		{
 			yyVAL.node = expr.NewArrayItem(yyDollar[1].node, yyDollar[3].node)
 
@@ -6828,19 +7571,23 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.DoubleArrowToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 460:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:3949
+		//line php7/php7.y:4919
 		{
 			yyVAL.node = expr.NewArrayItem(nil, yyDollar[1].node)
 
 			// save position
 			yylex.(*Parser).positions.AddPosition(yyVAL.node, yylex.(*Parser).positionBuilder.NewNodePosition(yyDollar[1].node))
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 461:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3956
+		//line php7/php7.y:4928
 		{
 			reference := expr.NewReference(yyDollar[4].node)
 			yyVAL.node = expr.NewArrayItem(yyDollar[1].node, reference)
@@ -6851,10 +7598,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.DoubleArrowToken)
 			yylex.(*Parser).comments.AddFromToken(reference, yyDollar[3].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 462:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:3968
+		//line php7/php7.y:4942
 		{
 			reference := expr.NewReference(yyDollar[2].node)
 			yyVAL.node = expr.NewArrayItem(nil, reference)
@@ -6864,10 +7613,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(reference, yyDollar[1].token, comment.AmpersandToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 463:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:3979
+		//line php7/php7.y:4955
 		{
 			// TODO: Cannot use list() as standalone expression
 			list := expr.NewList(yyDollar[5].list)
@@ -6882,10 +7633,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(list, yyDollar[3].token, comment.ListToken)
 			yylex.(*Parser).comments.AddFromToken(list, yyDollar[4].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(list, yyDollar[6].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 464:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:3995
+		//line php7/php7.y:4973
 		{
 			// TODO: Cannot use list() as standalone expression
 			list := expr.NewList(yyDollar[3].list)
@@ -6899,16 +7652,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(list, yyDollar[1].token, comment.ListToken)
 			yylex.(*Parser).comments.AddFromToken(list, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(list, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 465:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:4013
+		//line php7/php7.y:4993
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[2].node)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 466:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:4015
+		//line php7/php7.y:4999
 		{
 			encapsed := scalar.NewEncapsedStringPart(yyDollar[2].token.Value)
 			yyVAL.list = append(yyDollar[1].list, encapsed)
@@ -6918,16 +7675,20 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(encapsed, yyDollar[2].token, comment.EncapsedAndWhitespaceToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 467:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:4026
+		//line php7/php7.y:5012
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 468:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:4028
+		//line php7/php7.y:5018
 		{
 			encapsed := scalar.NewEncapsedStringPart(yyDollar[1].token.Value)
 			yyVAL.list = []node.Node{encapsed, yyDollar[2].node}
@@ -6937,10 +7698,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(encapsed, yyDollar[1].token, comment.EncapsedAndWhitespaceToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 469:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:4042
+		//line php7/php7.y:5034
 		{
 			name := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			yyVAL.node = expr.NewVariable(name)
@@ -6951,10 +7714,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 470:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:4054
+		//line php7/php7.y:5048
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -6969,10 +7734,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseSquareBracket)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 471:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:4070
+		//line php7/php7.y:5066
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			variable := expr.NewVariable(identifier)
@@ -6989,10 +7756,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(variable, yyDollar[1].token, comment.VariableToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.ObjectOperatorToken)
 			yylex.(*Parser).comments.AddFromToken(fetch, yyDollar[3].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 472:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:4088
+		//line php7/php7.y:5086
 		{
 			yyVAL.node = expr.NewVariable(yyDollar[2].node)
 
@@ -7002,10 +7771,12 @@ yydefault:
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DollarOpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 473:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:4099
+		//line php7/php7.y:5099
 		{
 			name := node.NewIdentifier(yyDollar[2].token.Value)
 			yyVAL.node = expr.NewVariable(name)
@@ -7018,10 +7789,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.DollarOpenCurlyBracesToken)
 			yylex.(*Parser).comments.AddFromToken(name, yyDollar[2].token, comment.StringVarnameToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 474:
 		yyDollar = yyS[yypt-6 : yypt+1]
-		//line php7/php7.y:4113
+		//line php7/php7.y:5115
 		{
 			identifier := node.NewIdentifier(yyDollar[2].token.Value)
 			variable := expr.NewVariable(identifier)
@@ -7038,16 +7811,20 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[3].token, comment.OpenSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.CloseSquareBracket)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[6].token, comment.CloseCurlyBracesToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 475:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:4131
+		//line php7/php7.y:5135
 		{
 			yyVAL.node = yyDollar[2].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 476:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:4138
+		//line php7/php7.y:5144
 		{
 			yyVAL.node = scalar.NewString(yyDollar[1].token.Value)
 
@@ -7056,10 +7833,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.StringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 477:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:4148
+		//line php7/php7.y:5156
 		{
 			// TODO: add option to handle 64 bit integer
 			if _, err := strconv.Atoi(yyDollar[1].token.Value); err == nil {
@@ -7073,10 +7852,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.NumStringToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 478:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:4163
+		//line php7/php7.y:5173
 		{
 			var lnumber *scalar.Lnumber
 			// TODO: add option to handle 64 bit integer
@@ -7104,10 +7885,12 @@ yydefault:
 			} else {
 				yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.NumStringToken)
 			}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 479:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:4192
+		//line php7/php7.y:5204
 		{
 			identifier := node.NewIdentifier(strings.TrimLeftFunc(yyDollar[1].token.Value, isDollar))
 			yyVAL.node = expr.NewVariable(identifier)
@@ -7118,10 +7901,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.VariableToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 480:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line php7/php7.y:4207
+		//line php7/php7.y:5221
 		{
 			yyVAL.node = expr.NewIsset(yyDollar[3].list)
 
@@ -7135,10 +7920,12 @@ yydefault:
 				yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CommaToken)
 			}
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[5].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 481:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:4222
+		//line php7/php7.y:5238
 		{
 			yyVAL.node = expr.NewEmpty(yyDollar[3].node)
 
@@ -7149,10 +7936,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.EmptyToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 482:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:4234
+		//line php7/php7.y:5252
 		{
 			yyVAL.node = expr.NewInclude(yyDollar[2].node)
 
@@ -7161,10 +7950,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IncludeToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 483:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:4244
+		//line php7/php7.y:5264
 		{
 			yyVAL.node = expr.NewIncludeOnce(yyDollar[2].node)
 
@@ -7173,10 +7964,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.IncludeOnceToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 484:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line php7/php7.y:4254
+		//line php7/php7.y:5276
 		{
 			yyVAL.node = expr.NewEval(yyDollar[3].node)
 
@@ -7187,10 +7980,12 @@ yydefault:
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.EvalToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[2].token, comment.OpenParenthesisToken)
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[4].token, comment.CloseParenthesisToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 485:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:4266
+		//line php7/php7.y:5290
 		{
 			yyVAL.node = expr.NewRequire(yyDollar[2].node)
 
@@ -7199,10 +7994,12 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.RequireToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 486:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line php7/php7.y:4276
+		//line php7/php7.y:5302
 		{
 			yyVAL.node = expr.NewRequireOnce(yyDollar[2].node)
 
@@ -7211,27 +8008,35 @@ yydefault:
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(yyVAL.node, yyDollar[1].token, comment.RequireOnceToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 487:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:4289
+		//line php7/php7.y:5317
 		{
 			yyVAL.list = []node.Node{yyDollar[1].node}
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 488:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line php7/php7.y:4291
+		//line php7/php7.y:5323
 		{
 			yyVAL.list = append(yyDollar[1].list, yyDollar[3].node)
 
 			// save comments
 			yylex.(*Parser).comments.AddFromToken(lastNode(yyDollar[1].list), yyDollar[2].token, comment.CommaToken)
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	case 489:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line php7/php7.y:4301
+		//line php7/php7.y:5335
 		{
 			yyVAL.node = yyDollar[1].node
+
+			yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
 		}
 	}
 	goto yystack /* stack new state and value */
diff --git a/php7/php7.y b/php7/php7.y
index 476e267..1620098 100644
--- a/php7/php7.y
+++ b/php7/php7.y
@@ -302,6 +302,8 @@ start:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition(yylex.(*Parser).rootNode, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -317,15 +319,21 @@ reserved_non_modifiers:
 
 semi_reserved:
         reserved_non_modifiers
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
     |   T_STATIC {$$=$1} | T_ABSTRACT {$$=$1} | T_FINAL {$$=$1} | T_PRIVATE {$$=$1} | T_PROTECTED {$$=$1} | T_PUBLIC {$$=$1}
 ;
 
 identifier:
         T_STRING
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
     |   semi_reserved
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 top_statement_list:
@@ -334,9 +342,15 @@ top_statement_list:
                 if $2 != nil {
                     $$ = append($1, $2)
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 namespace_name:
@@ -350,6 +364,8 @@ namespace_name:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(namePart, $1, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   namespace_name T_NS_SEPARATOR T_STRING
             {
@@ -362,6 +378,8 @@ namespace_name:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.NsSeparatorToken)
                 yylex.(*Parser).comments.AddFromToken(namePart, $3, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -372,6 +390,8 @@ name:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     | T_NAMESPACE T_NS_SEPARATOR namespace_name
             {
@@ -383,6 +403,8 @@ name:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     | T_NS_SEPARATOR namespace_name
             {
@@ -393,6 +415,8 @@ name:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -401,17 +425,39 @@ top_statement:
             {
                 // error
                 $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   function_declaration_statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   class_declaration_statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   trait_declaration_statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   interface_declaration_statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_HALT_COMPILER '(' ')' ';'
             {
                 $$ = stmt.NewHaltCompiler()
@@ -424,6 +470,8 @@ top_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE namespace_name ';'
             {
@@ -437,6 +485,8 @@ top_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE namespace_name '{' top_statement_list '}'
             {
@@ -451,6 +501,8 @@ top_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NAMESPACE '{' top_statement_list '}'
             {
@@ -463,6 +515,8 @@ top_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NamespaceToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_USE mixed_group_use_declaration ';'
             {
@@ -474,6 +528,8 @@ top_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UseToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_USE use_type group_use_declaration ';'
             {
@@ -485,6 +541,8 @@ top_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UseToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_USE use_declarations ';'
             {
@@ -496,6 +554,8 @@ top_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UseToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_USE use_type use_declarations ';'
             {
@@ -507,6 +567,8 @@ top_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UseToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CONST const_list ';'
             {
@@ -518,6 +580,8 @@ top_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ConstToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -531,6 +595,8 @@ use_type:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.FunctionToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CONST
             {
@@ -541,6 +607,8 @@ use_type:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ConstToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -561,6 +629,8 @@ group_use_declaration:
                     yylex.(*Parser).comments.AddFromToken($$, $5, comment.CommaToken)
                 }
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name T_NS_SEPARATOR '{' unprefixed_use_declarations possible_comma '}'
             {
@@ -579,6 +649,8 @@ group_use_declaration:
                     yylex.(*Parser).comments.AddFromToken($$, $6, comment.CommaToken)
                 }
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -599,6 +671,8 @@ mixed_group_use_declaration:
                     yylex.(*Parser).comments.AddFromToken($$, $5, comment.CommaToken)
                 }
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name T_NS_SEPARATOR '{' inline_use_declarations possible_comma '}'
             {
@@ -617,14 +691,20 @@ mixed_group_use_declaration:
                     yylex.(*Parser).comments.AddFromToken($$, $6, comment.CommaToken)
                 }
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 possible_comma:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+            }
     |   ','
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 inline_use_declarations:
@@ -634,9 +714,15 @@ inline_use_declarations:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   inline_use_declaration
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 unprefixed_use_declarations:
@@ -646,9 +732,15 @@ unprefixed_use_declarations:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   unprefixed_use_declaration
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 use_declarations:
@@ -658,16 +750,30 @@ use_declarations:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   use_declaration
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 inline_use_declaration:
         unprefixed_use_declaration
-            { $$ = $1 }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   use_type unprefixed_use_declaration
-            { $$ = $2.(*stmt.Use).SetUseType($1) }
+            {
+                $$ = $2.(*stmt.Use).SetUseType($1)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 unprefixed_use_declaration:
@@ -679,6 +785,8 @@ unprefixed_use_declaration:
                 // save position
                 yylex.(*Parser).positions.AddPosition(name, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodeListPosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   namespace_name T_AS T_STRING
             {
@@ -694,18 +802,26 @@ unprefixed_use_declaration:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken(alias, $3, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 use_declaration:
         unprefixed_use_declaration
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_NS_SEPARATOR unprefixed_use_declaration
             {
                 $$ = $2;
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -716,9 +832,15 @@ const_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   const_decl
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 inner_statement_list:
@@ -727,9 +849,15 @@ inner_statement_list:
                 if $2 != nil {
                     $$ = append($1, $2)
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 inner_statement:
@@ -737,17 +865,39 @@ inner_statement:
             {
                 // error
                 $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   function_declaration_statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   class_declaration_statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   trait_declaration_statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   interface_declaration_statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_HALT_COMPILER '(' ')' ';'
             {
                 $$ = stmt.NewHaltCompiler()
@@ -760,6 +910,8 @@ inner_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 
 statement:
@@ -773,11 +925,21 @@ statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   if_stmt
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   alt_if_stmt
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_WHILE '(' expr ')' while_statement
             {
                 switch n := $5.(type) {
@@ -796,6 +958,8 @@ statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.WhileToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DO statement T_WHILE '(' expr ')' ';'
             {
@@ -810,6 +974,8 @@ statement:
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FOR '(' for_exprs ';' for_exprs ';' for_exprs ')' for_statement
             {
@@ -835,6 +1001,8 @@ statement:
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.ForInitSemicolonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.ForCondSemicolonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $8, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_SWITCH '(' expr ')' switch_case_list
             {
@@ -856,6 +1024,8 @@ statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.SwitchToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_BREAK optional_expr ';'
             {
@@ -867,6 +1037,8 @@ statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.BreakToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CONTINUE optional_expr ';'
             {
@@ -878,6 +1050,8 @@ statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ContinueToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_RETURN optional_expr ';'
             {
@@ -889,6 +1063,8 @@ statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ReturnToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_GLOBAL global_var_list ';'
             {
@@ -900,6 +1076,8 @@ statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.GlobalToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_STATIC static_var_list ';'
             {
@@ -911,6 +1089,8 @@ statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StaticToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_ECHO echo_expr_list ';'
             {
@@ -922,6 +1102,8 @@ statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.EchoToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_INLINE_HTML
             {
@@ -932,6 +1114,8 @@ statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.InlineHTMLToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr ';'
             {
@@ -942,6 +1126,8 @@ statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_UNSET '(' unset_variables possible_comma ')' ';' 
             {
@@ -958,6 +1144,8 @@ statement:
                 }
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FOREACH '(' expr T_AS foreach_variable ')' foreach_statement
             {
@@ -980,6 +1168,8 @@ statement:
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FOREACH '(' expr T_AS variable T_DOUBLE_ARROW foreach_variable ')' foreach_statement
             {
@@ -1005,6 +1195,8 @@ statement:
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.DoubleArrowToken)
                 yylex.(*Parser).comments.AddFromToken($$, $8, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DECLARE '(' const_list ')' declare_statement
             {
@@ -1017,6 +1209,8 @@ statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DeclareToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ';'
             {
@@ -1027,6 +1221,8 @@ statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_TRY '{' inner_statement_list '}' catch_list finally_statement
             {
@@ -1042,6 +1238,8 @@ statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.TryToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_THROW expr ';'
             {
@@ -1053,6 +1251,8 @@ statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ThrowToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_GOTO T_STRING ';'
             {
@@ -1067,6 +1267,8 @@ statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.GotoToken)
                 yylex.(*Parser).comments.AddFromToken(label, $2, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_STRING ':'
             {
@@ -1080,11 +1282,17 @@ statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(label, $1, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 
 catch_list:
         /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   catch_list T_CATCH '(' catch_name_list T_VARIABLE ')' '{' inner_statement_list '}'
             {
                 identifier := node.NewIdentifier(strings.TrimLeftFunc($5.Value, isDollar))
@@ -1104,23 +1312,35 @@ catch_list:
                 yylex.(*Parser).comments.AddFromToken(catch, $6, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken(catch, $7, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken(catch, $9, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 catch_name_list:
         name
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   catch_name_list '|' name
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.VerticalBarToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 finally_statement:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_FINALLY '{' inner_statement_list '}'
             {
                 $$ = stmt.NewFinally($3)
@@ -1132,24 +1352,36 @@ finally_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.FinallyToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 unset_variables:
         unset_variable
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   unset_variables ',' unset_variable
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 unset_variable:
         variable
-            { $$ = $1 }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 function_declaration_statement:
@@ -1173,21 +1405,31 @@ function_declaration_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $9, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $11, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 is_reference:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+            }
     |   '&'
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 is_variadic:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+            }
     |   T_ELLIPSIS
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 class_declaration_statement:
@@ -1205,6 +1447,8 @@ class_declaration_statement:
                 yylex.(*Parser).comments.AddFromToken(name, $3, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $9, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CLASS T_STRING extends_from implements_list backup_doc_comment '{' class_statement_list '}'
             {
@@ -1220,14 +1464,24 @@ class_declaration_statement:
                 yylex.(*Parser).comments.AddFromToken(name, $2, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $8, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 class_modifiers:
         class_modifier
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   class_modifiers class_modifier
-            { $$ = append($1, $2) }
+            {
+                $$ = append($1, $2)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 class_modifier:
@@ -1240,6 +1494,8 @@ class_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.AbstractToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FINAL
             {
@@ -1250,6 +1506,8 @@ class_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.FinalToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1268,6 +1526,8 @@ trait_declaration_statement:
                 yylex.(*Parser).comments.AddFromToken(name, $2, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1286,12 +1546,18 @@ interface_declaration_statement:
                 yylex.(*Parser).comments.AddFromToken(name, $2, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 extends_from:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_EXTENDS name
             {
                 $$ = stmt.NewClassExtends($2);
@@ -1301,12 +1567,18 @@ extends_from:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ExtendsToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 interface_extends_list:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_EXTENDS name_list
             {
                 $$ = stmt.NewInterfaceExtends($2);
@@ -1316,12 +1588,18 @@ interface_extends_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ExtendsToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 implements_list:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_IMPLEMENTS name_list
             {
                 $$ = stmt.NewClassImplements($2);
@@ -1331,6 +1609,8 @@ implements_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ImplementsToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1338,6 +1618,8 @@ foreach_variable:
         variable
             {
                 $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '&' variable
             {
@@ -1348,6 +1630,8 @@ foreach_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_LIST '(' array_pair_list ')'
             {
@@ -1360,6 +1644,8 @@ foreach_variable:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ListToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '[' array_pair_list ']'
             {
@@ -1371,6 +1657,8 @@ foreach_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1381,6 +1669,8 @@ for_statement:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ':' inner_statement_list T_ENDFOR ';'
             {
@@ -1395,6 +1685,8 @@ for_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.EndforToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1405,6 +1697,8 @@ foreach_statement:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ':' inner_statement_list T_ENDFOREACH ';'
             {
@@ -1419,12 +1713,18 @@ foreach_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.EndforeachToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 declare_statement:
         statement
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   ':' inner_statement_list T_ENDDECLARE ';'
             {
                 $$ = stmt.NewStmtList($2)
@@ -1436,6 +1736,8 @@ declare_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.EnddeclareToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1452,6 +1754,8 @@ switch_case_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(caseList, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken(caseList, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '{' ';' case_list '}'
             {
@@ -1466,6 +1770,8 @@ switch_case_list:
                 yylex.(*Parser).comments.AddFromToken(caseList, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken(caseList, $2, comment.SemiColonToken)
                 yylex.(*Parser).comments.AddFromToken(caseList, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ':' case_list T_ENDSWITCH ';'
             {
@@ -1480,6 +1786,8 @@ switch_case_list:
                 yylex.(*Parser).comments.AddFromToken(caseList, $1, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken(caseList, $3, comment.EndswitchToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ':' ';' case_list T_ENDSWITCH ';'
             {
@@ -1496,12 +1804,18 @@ switch_case_list:
                 yylex.(*Parser).comments.AddFromToken(caseList, $2, comment.SemiColonToken)
                 yylex.(*Parser).comments.AddFromToken(caseList, $4, comment.EndswitchToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 case_list:
         /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   case_list T_CASE expr case_separator inner_statement_list
             {
                 _case := stmt.NewCase($3, $5)
@@ -1513,6 +1827,8 @@ case_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(_case, $2, comment.CaseToken)
                 yylex.(*Parser).comments.AddFromToken(_case, $4, comment.CaseSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   case_list T_DEFAULT case_separator inner_statement_list
             {
@@ -1525,14 +1841,20 @@ case_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(_default, $2, comment.DefaultToken)
                 yylex.(*Parser).comments.AddFromToken(_default, $3, comment.CaseSeparatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 case_separator:
         ':'
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
     |   ';'
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 while_statement:
@@ -1542,6 +1864,8 @@ while_statement:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   ':' inner_statement_list T_ENDWHILE ';'
             {
@@ -1556,6 +1880,8 @@ while_statement:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.EndwhileToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1571,6 +1897,8 @@ if_stmt_without_else:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IfToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   if_stmt_without_else T_ELSEIF '(' expr ')' statement
             {
@@ -1585,12 +1913,18 @@ if_stmt_without_else:
                 yylex.(*Parser).comments.AddFromToken(_elseIf, $2, comment.ElseifToken)
                 yylex.(*Parser).comments.AddFromToken(_elseIf, $3, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken(_elseIf, $5, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 if_stmt:
         if_stmt_without_else %prec T_NOELSE
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   if_stmt_without_else T_ELSE statement
             {
                 _else := stmt.NewElse($3)
@@ -1602,6 +1936,8 @@ if_stmt:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ElseToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1620,6 +1956,8 @@ alt_if_stmt_without_else:
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   alt_if_stmt_without_else T_ELSEIF '(' expr ')' ':' inner_statement_list
             {
@@ -1636,6 +1974,8 @@ alt_if_stmt_without_else:
                 yylex.(*Parser).comments.AddFromToken(_elseIf, $3, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken(_elseIf, $5, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken(_elseIf, $6, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1650,6 +1990,8 @@ alt_if_stmt:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.EndifToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   alt_if_stmt_without_else T_ELSE ':' inner_statement_list T_ENDIF ';'
             {
@@ -1667,25 +2009,41 @@ alt_if_stmt:
                 yylex.(*Parser).comments.AddFromToken(_else, $3, comment.ColonToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.EndifToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 parameter_list:
         non_empty_parameter_list
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 non_empty_parameter_list:
         parameter
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_parameter_list ',' parameter
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1717,6 +2075,8 @@ parameter:
                     yylex.(*Parser).comments.AddFromToken($$, $3, comment.EllipsisToken)
                 }
                 yylex.(*Parser).comments.AddFromToken(variable, $4, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   optional_type is_reference is_variadic T_VARIABLE '=' expr
             {
@@ -1746,19 +2106,33 @@ parameter:
                 }
                 yylex.(*Parser).comments.AddFromToken(variable, $4, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 optional_type:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   type_expr
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 type_expr:
         type
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '?' type
             {
                 $$ = node.NewNullable($2)
@@ -1768,6 +2142,8 @@ type_expr:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.QuestionMarkToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1781,6 +2157,8 @@ type:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ArrayToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CALLABLE
             {
@@ -1791,20 +2169,32 @@ type:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.CallableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   name
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 return_type:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   ':' type_expr
             {
                 $$ = $2;
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1819,6 +2209,8 @@ argument_list:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '(' non_empty_argument_list possible_comma ')'
             {
@@ -1833,18 +2225,26 @@ argument_list:
                     yylex.(*Parser).comments.AddFromToken($$, $3, comment.CommaToken)
                 }
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 non_empty_argument_list:
         argument
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_argument_list ',' argument
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1855,6 +2255,8 @@ argument:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_ELLIPSIS expr
             {
@@ -1865,6 +2267,8 @@ argument:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.EllipsisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -1875,14 +2279,24 @@ global_var_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   global_var
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 global_var:
         simple_variable
-            { $$ = $1 }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 static_var_list:
@@ -1892,9 +2306,15 @@ static_var_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   static_var
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 static_var:
@@ -1911,6 +2331,8 @@ static_var:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE '=' expr
             {
@@ -1926,14 +2348,24 @@ static_var:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 class_statement_list:
         class_statement_list class_statement
-            { $$ = append($1, $2) }
+            {
+                $$ = append($1, $2)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 class_statement:
@@ -1946,6 +2378,8 @@ class_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   method_modifiers T_CONST class_const_list ';'
             {
@@ -1957,6 +2391,8 @@ class_statement:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ConstToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_USE name_list trait_adaptations
             {
@@ -1977,6 +2413,8 @@ class_statement:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UseToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   method_modifiers T_FUNCTION returns_ref identifier backup_doc_comment '(' parameter_list ')' return_type method_body
             {
@@ -1999,18 +2437,26 @@ class_statement:
                 yylex.(*Parser).comments.AddFromToken(name, $4, comment.IdentifierToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $8, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 name_list:
         name
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   name_list ',' name
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2024,6 +2470,8 @@ trait_adaptations:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.SemiColonToken)
 
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '{' '}'
             {
@@ -2034,6 +2482,8 @@ trait_adaptations:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '{' trait_adaptation_list '}'
             {
@@ -2044,14 +2494,24 @@ trait_adaptations:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 trait_adaptation_list:
         trait_adaptation
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   trait_adaptation_list trait_adaptation
-            { $$ = append($1, $2) }
+            {
+                $$ = append($1, $2)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 trait_adaptation:
@@ -2061,6 +2521,8 @@ trait_adaptation:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   trait_alias ';'
             {
@@ -2068,6 +2530,8 @@ trait_adaptation:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2081,6 +2545,8 @@ trait_precedence:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.InsteadofToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2097,6 +2563,8 @@ trait_alias:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken(alias, $3, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   trait_method_reference T_AS reserved_non_modifiers
             {
@@ -2110,6 +2578,8 @@ trait_alias:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken(alias, $3, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   trait_method_reference T_AS member_modifier identifier
             {
@@ -2123,6 +2593,8 @@ trait_alias:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsToken)
                 yylex.(*Parser).comments.AddFromToken(alias, $4, comment.IdentifierToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   trait_method_reference T_AS member_modifier
             {
@@ -2133,6 +2605,8 @@ trait_alias:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2148,9 +2622,15 @@ trait_method_reference:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(name, $1, comment.IdentifierToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   absolute_trait_method_reference
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 absolute_trait_method_reference:
@@ -2166,6 +2646,8 @@ absolute_trait_method_reference:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
                 yylex.(*Parser).comments.AddFromToken(target, $3, comment.IdentifierToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2179,6 +2661,8 @@ method_body:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.SemiColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '{' inner_statement_list '}'
             {
@@ -2190,12 +2674,18 @@ method_body:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 variable_modifiers:
         non_empty_member_modifiers
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_VAR
             {
                 modifier := node.NewIdentifier($1.Value)
@@ -2206,21 +2696,39 @@ variable_modifiers:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(modifier, $1, comment.VarToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 method_modifiers:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_member_modifiers
-            { $$ = $1 }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 non_empty_member_modifiers:
         member_modifier
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_member_modifiers member_modifier
-            { $$ = append($1, $2) }
+            {
+                $$ = append($1, $2)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 member_modifier:
@@ -2233,6 +2741,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.PublicToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_PROTECTED
             {
@@ -2243,6 +2753,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ProtectedToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_PRIVATE
             {
@@ -2253,6 +2765,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.PrivateToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_STATIC
             {
@@ -2263,6 +2777,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StaticToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_ABSTRACT
             {
@@ -2273,6 +2789,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.AbstractToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FINAL
             {
@@ -2283,6 +2801,8 @@ member_modifier:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.FinalToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2293,9 +2813,15 @@ property_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   property
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 property:
@@ -2312,6 +2838,8 @@ property:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE '=' expr backup_doc_comment
             {
@@ -2327,6 +2855,8 @@ property:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2337,9 +2867,15 @@ class_const_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   class_const_decl
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 class_const_decl:
@@ -2355,6 +2891,8 @@ class_const_decl:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(name, $1, comment.IdentifierToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2371,6 +2909,8 @@ const_decl:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(name, $1, comment.StringToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2381,21 +2921,39 @@ echo_expr_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   echo_expr
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 echo_expr:
         expr
-            { $$ = $1 }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 for_exprs:
         /* empty */
-            { $$ = nil; }
+            {
+                $$ = nil;
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   non_empty_for_exprs
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 non_empty_for_exprs:
@@ -2405,9 +2963,15 @@ non_empty_for_exprs:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 anonymous_class:
@@ -2426,6 +2990,8 @@ anonymous_class:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ClassToken)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $8, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2442,6 +3008,8 @@ new_expr:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NewToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NEW anonymous_class
             {
@@ -2452,6 +3020,8 @@ new_expr:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NewToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -2470,6 +3040,8 @@ expr_without_variable:
                 yylex.(*Parser).comments.AddFromToken(list, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken(list, $4, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '[' array_pair_list ']' '=' expr
             {
@@ -2484,6 +3056,8 @@ expr_without_variable:
                 yylex.(*Parser).comments.AddFromToken(shortList, $1, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken(shortList, $3, comment.CloseSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable '=' expr
             {
@@ -2494,6 +3068,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.EqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable '=' '&' expr
             {
@@ -2505,6 +3081,8 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.EqualToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CLONE expr
             {
@@ -2515,6 +3093,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.CloneToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_PLUS_EQUAL expr
             {
@@ -2525,6 +3105,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PlusEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_MINUS_EQUAL expr
             {
@@ -2535,6 +3117,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.MinusEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_MUL_EQUAL expr
             {
@@ -2545,6 +3129,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.MulEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_POW_EQUAL expr
             {
@@ -2555,6 +3141,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PowEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_DIV_EQUAL expr
             {
@@ -2565,6 +3153,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.DivEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_CONCAT_EQUAL expr
             {
@@ -2575,6 +3165,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ConcatEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_MOD_EQUAL expr
             {
@@ -2585,6 +3177,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ModEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_AND_EQUAL expr
             {
@@ -2595,6 +3189,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AndEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_OR_EQUAL expr
             {
@@ -2605,6 +3201,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OrEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_XOR_EQUAL expr
             {
@@ -2615,6 +3213,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.XorEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_SL_EQUAL expr
             {
@@ -2625,6 +3225,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SlEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_SR_EQUAL expr
             {
@@ -2635,6 +3237,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SrEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_INC
             {
@@ -2645,6 +3249,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IncToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_INC variable
             {
@@ -2655,6 +3261,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IncToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable T_DEC
             {
@@ -2665,6 +3273,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.DecToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DEC variable
             {
@@ -2675,6 +3285,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DecToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_BOOLEAN_OR expr
             {
@@ -2685,6 +3297,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.BooleanOrToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_BOOLEAN_AND expr
             {
@@ -2695,6 +3309,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.BooleanAndToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_LOGICAL_OR expr
             {
@@ -2705,6 +3321,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LogicalOrToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_LOGICAL_AND expr
             {
@@ -2715,6 +3333,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LogicalAndToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_LOGICAL_XOR expr
             {
@@ -2725,6 +3345,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LogicalXorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '|' expr
             {
@@ -2735,6 +3357,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.VerticalBarToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '&' expr
             {
@@ -2745,6 +3369,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '^' expr
             {
@@ -2755,6 +3381,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.CaretToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '.' expr
             {
@@ -2765,6 +3393,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.DotToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '+' expr
             {
@@ -2775,6 +3405,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PlusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '-' expr
             {
@@ -2785,6 +3417,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.MinusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '*' expr
             {
@@ -2795,6 +3429,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.AsteriskToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_POW expr
             {
@@ -2805,6 +3441,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '/' expr
             {
@@ -2815,6 +3453,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SlashToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '%' expr
             {
@@ -2825,6 +3465,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PercentToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_SL expr
             {
@@ -2835,6 +3477,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SlToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_SR expr
             {
@@ -2845,6 +3489,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SrToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '+' expr %prec T_INC
             {
@@ -2855,6 +3501,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.PlusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '-' expr %prec T_INC
             {
@@ -2865,6 +3513,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.MinusToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '!' expr
             {
@@ -2875,6 +3525,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ExclamationMarkToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '~' expr
             {
@@ -2885,6 +3537,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.TildeToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_IDENTICAL expr
             {
@@ -2895,6 +3549,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsIdenticalToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_NOT_IDENTICAL expr
             {
@@ -2905,6 +3561,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsNotIdenticalToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_EQUAL expr
             {
@@ -2915,6 +3573,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_NOT_EQUAL expr
             {
@@ -2925,6 +3585,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsNotEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '<' expr
             {
@@ -2935,6 +3597,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.LessToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_SMALLER_OR_EQUAL expr
             {
@@ -2945,6 +3609,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsSmallerOrEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '>' expr
             {
@@ -2955,6 +3621,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.GreaterToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_IS_GREATER_OR_EQUAL expr
             {
@@ -2965,6 +3633,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.IsGreaterOrEqualToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_SPACESHIP expr
             {
@@ -2975,6 +3645,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.SpaceshipToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_INSTANCEOF class_name_reference
             {
@@ -2985,6 +3657,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.InstanceofToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '(' expr ')'
             {
@@ -2993,9 +3667,15 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   new_expr
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   expr '?' expr ':' expr
             {
                 $$ = expr.NewTernary($1, $3, $5)
@@ -3006,6 +3686,8 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.QuestionMarkToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr '?' ':' expr
             {
@@ -3017,6 +3699,8 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.QuestionMarkToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.ColonToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_COALESCE expr
             {
@@ -3027,9 +3711,15 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.CoalesceToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   internal_functions_in_yacc
-            { $$ = $1}
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_INT_CAST expr
             {
                 $$ = cast.NewInt($2)
@@ -3039,6 +3729,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IntCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DOUBLE_CAST expr
             {
@@ -3049,6 +3741,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DoubleCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_STRING_CAST expr
             {
@@ -3059,6 +3753,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StringCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_ARRAY_CAST expr
             {
@@ -3069,6 +3765,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ArrayCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_OBJECT_CAST expr
             {
@@ -3079,6 +3777,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ObjectCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_BOOL_CAST expr
             {
@@ -3089,6 +3789,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.BoolCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_UNSET_CAST expr
             {
@@ -3099,6 +3801,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UnsetCastToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_EXIT exit_expr
             {
@@ -3127,6 +3831,8 @@ expr_without_variable:
                 if $2 != nil {
                     yylex.(*Parser).comments.AddFromChildNode($$, $2)
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '@' expr
             {
@@ -3137,9 +3843,15 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.AtToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   scalar
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '`' backticks_expr '`'
             {
                 $$ = expr.NewShellExec($2)
@@ -3150,6 +3862,8 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.BackquoteToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.BackquoteToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_PRINT expr
             {
@@ -3160,6 +3874,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.PrintToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_YIELD
             {
@@ -3170,6 +3886,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.YieldToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_YIELD expr
             {
@@ -3180,6 +3898,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.YieldToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_YIELD expr T_DOUBLE_ARROW expr
             {
@@ -3191,6 +3911,8 @@ expr_without_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.YieldToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.DoubleArrowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_YIELD_FROM expr
             {
@@ -3201,6 +3923,8 @@ expr_without_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.YieldFromToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FUNCTION returns_ref backup_doc_comment '(' parameter_list ')' lexical_vars return_type '{' inner_statement_list '}'
             {
@@ -3218,6 +3942,8 @@ expr_without_variable:
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $9, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $11, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_STATIC T_FUNCTION returns_ref backup_doc_comment '(' parameter_list ')' lexical_vars return_type '{' inner_statement_list '}'
             {
@@ -3236,6 +3962,8 @@ expr_without_variable:
                 yylex.(*Parser).comments.AddFromToken($$, $7, comment.CloseParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $10, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $12, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3244,19 +3972,29 @@ backup_doc_comment:
             {
                 $$ = yylex.(*Parser).PhpDocComment
                 yylex.(*Parser).PhpDocComment = ""
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 returns_ref:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+            }
     |   '&'
-            { $$ = $1 }
+            {
+                $$ = $1
+            }
 ;
 
 lexical_vars:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_USE '(' lexical_var_list ')'
             {
                 $$ = expr.NewClosureUse($3)
@@ -3268,6 +4006,8 @@ lexical_vars:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.UseToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3278,9 +4018,15 @@ lexical_var_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   lexical_var
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 lexical_var:
@@ -3295,6 +4041,8 @@ lexical_var:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '&' T_VARIABLE
             {
@@ -3310,6 +4058,8 @@ lexical_var:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.AmpersandToken)
                 yylex.(*Parser).comments.AddFromToken(variable, $2, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3320,6 +4070,8 @@ function_call:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodesPosition($1, $2))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   class_name T_PAAMAYIM_NEKUDOTAYIM member_name argument_list
             {
@@ -3330,6 +4082,8 @@ function_call:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable_class_name T_PAAMAYIM_NEKUDOTAYIM member_name argument_list
             {
@@ -3340,6 +4094,8 @@ function_call:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   callable_expr argument_list
             {
@@ -3347,6 +4103,8 @@ function_call:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodesPosition($1, $2))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3360,21 +4118,39 @@ class_name:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StaticToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   name
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 class_name_reference:
         class_name
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   new_variable
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 exit_expr:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '(' optional_expr ')'
             {
                 $$ = expr.NewExit($2);
@@ -3385,23 +4161,45 @@ exit_expr:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 backticks_expr:
         /* empty */
-            { $$ = []node.Node{} }
+            {
+                $$ = []node.Node{}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_ENCAPSED_AND_WHITESPACE
-            { $$ = []node.Node{scalar.NewEncapsedStringPart($1.Value)} }
+            {
+                $$ = []node.Node{scalar.NewEncapsedStringPart($1.Value)}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   encaps_list
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 ctor_arguments:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   argument_list
-            { $$ = $1 }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 dereferencable_scalar:
@@ -3416,6 +4214,8 @@ dereferencable_scalar:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ArrayToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '[' array_pair_list ']'
             {
@@ -3427,6 +4227,8 @@ dereferencable_scalar:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CONSTANT_ENCAPSED_STRING
             {
@@ -3437,6 +4239,8 @@ dereferencable_scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ConstantEncapsedStringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3450,6 +4254,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.LnumberToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DNUMBER
             {
@@ -3460,6 +4266,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DnumberToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_LINE
             {
@@ -3470,6 +4278,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.LineToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FILE
             {
@@ -3480,6 +4290,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.FileToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DIR
             {
@@ -3490,6 +4302,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DirToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_TRAIT_C
             {
@@ -3500,6 +4314,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.TraitCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_METHOD_C
             {
@@ -3510,6 +4326,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.MethodCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_FUNC_C
             {
@@ -3520,6 +4338,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.FuncCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_C
             {
@@ -3530,6 +4350,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NsCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CLASS_C
             {
@@ -3540,6 +4362,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.ClassCToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_START_HEREDOC T_ENCAPSED_AND_WHITESPACE T_END_HEREDOC 
             {
@@ -3552,6 +4376,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StartHeredocToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_START_HEREDOC T_END_HEREDOC
             {
@@ -3562,6 +4388,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StartHeredocToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '"' encaps_list '"'
             {
@@ -3572,6 +4400,8 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DoubleQuoteToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_START_HEREDOC encaps_list T_END_HEREDOC
             {
@@ -3582,11 +4412,21 @@ scalar:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StartHeredocToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   dereferencable_scalar
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   constant
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 constant:
@@ -3596,6 +4436,8 @@ constant:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   class_name T_PAAMAYIM_NEKUDOTAYIM identifier
             {
@@ -3609,6 +4451,8 @@ constant:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
                 yylex.(*Parser).comments.AddFromToken(target, $3, comment.IdentifierToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable_class_name T_PAAMAYIM_NEKUDOTAYIM identifier
             {
@@ -3622,31 +4466,57 @@ constant:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
                 yylex.(*Parser).comments.AddFromToken(target, $3, comment.IdentifierToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 expr:
         variable
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   expr_without_variable
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 optional_expr:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   expr
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 variable_class_name:
         dereferencable
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 dereferencable:
         variable
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '(' expr ')'
             {
                 $$ = $2;
@@ -3654,14 +4524,24 @@ dereferencable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   dereferencable_scalar
-        { $$ = $1; }
+            {
+                $$ = $1;
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 callable_expr:
         callable_variable
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   '(' expr ')'
             {
                 $$ = $2;
@@ -3669,14 +4549,24 @@ callable_expr:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   dereferencable_scalar
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 callable_variable:
         simple_variable
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   dereferencable '[' optional_expr ']'
             {
                 $$ = expr.NewArrayDimFetch($1, $3)
@@ -3687,6 +4577,8 @@ callable_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   constant '[' optional_expr ']'
             {
@@ -3698,6 +4590,8 @@ callable_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   dereferencable '{' expr '}'
             {
@@ -3709,6 +4603,8 @@ callable_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   dereferencable T_OBJECT_OPERATOR property_name argument_list
             {
@@ -3719,16 +4615,30 @@ callable_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ObjectOperatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   function_call
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 variable:
         callable_variable
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   static_member
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   dereferencable T_OBJECT_OPERATOR property_name
             {
                 $$ = expr.NewPropertyFetch($1, $3)
@@ -3738,6 +4648,8 @@ variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ObjectOperatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3753,6 +4665,8 @@ simple_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '$' '{' expr '}'
             {
@@ -3765,6 +4679,8 @@ simple_variable:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DollarToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '$' simple_variable
             {
@@ -3775,6 +4691,8 @@ simple_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DollarToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3788,6 +4706,8 @@ static_member:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   variable_class_name T_PAAMAYIM_NEKUDOTAYIM simple_variable
             {
@@ -3798,12 +4718,18 @@ static_member:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 new_variable:
         simple_variable
-            { $$ = $1 }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   new_variable '[' optional_expr ']'
             {
                 $$ = expr.NewArrayDimFetch($1, $3)
@@ -3814,6 +4740,8 @@ new_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   new_variable '{' expr '}'
             {
@@ -3825,6 +4753,8 @@ new_variable:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   new_variable T_OBJECT_OPERATOR property_name
             {
@@ -3835,6 +4765,8 @@ new_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ObjectOperatorToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   class_name T_PAAMAYIM_NEKUDOTAYIM simple_variable
             {
@@ -3845,6 +4777,8 @@ new_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   new_variable T_PAAMAYIM_NEKUDOTAYIM simple_variable
             {
@@ -3855,6 +4789,8 @@ new_variable:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.PaamayimNekudotayimToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -3868,6 +4804,8 @@ member_name:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IdentifierToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '{' expr '}'
             {
@@ -3876,9 +4814,15 @@ member_name:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   simple_variable
-            { $$ = $1 }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 property_name:
@@ -3891,6 +4835,8 @@ property_name:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '{' expr '}'
             {
@@ -3899,27 +4845,43 @@ property_name:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   simple_variable
-            { $$ = $1 }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 array_pair_list:
-    non_empty_array_pair_list
-        {
-            if ($1[len($1)-1] == nil) {
-                $$ = $1[:len($1)-1]
-            } else {
-                $$ = $1
+        non_empty_array_pair_list
+            {
+                if ($1[len($1)-1] == nil) {
+                    $$ = $1[:len($1)-1]
+                } else {
+                    $$ = $1
+                }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
-        }
 ;
 
 possible_array_pair:
         /* empty */
-            { $$ = nil }
+            {
+                $$ = nil
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   array_pair
-            { $$ = $1; }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 non_empty_array_pair_list:
@@ -3929,9 +4891,15 @@ non_empty_array_pair_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   possible_array_pair
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 array_pair:
@@ -3944,6 +4912,8 @@ array_pair:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.DoubleArrowToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr
             {
@@ -3951,6 +4921,8 @@ array_pair:
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_DOUBLE_ARROW '&' variable
             {
@@ -3963,6 +4935,8 @@ array_pair:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.DoubleArrowToken)
                 yylex.(*Parser).comments.AddFromToken(reference, $3, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '&' variable
             {
@@ -3974,6 +4948,8 @@ array_pair:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(reference, $1, comment.AmpersandToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   expr T_DOUBLE_ARROW T_LIST '(' array_pair_list ')'
             {
@@ -3990,6 +4966,8 @@ array_pair:
                 yylex.(*Parser).comments.AddFromToken(list, $3, comment.ListToken)
                 yylex.(*Parser).comments.AddFromToken(list, $4, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken(list, $6, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_LIST '(' array_pair_list ')'
             {
@@ -4005,12 +4983,18 @@ array_pair:
                 yylex.(*Parser).comments.AddFromToken(list, $1, comment.ListToken)
                 yylex.(*Parser).comments.AddFromToken(list, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken(list, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 encaps_list:
         encaps_list encaps_var
-            { $$ = append($1, $2) }
+            {
+                $$ = append($1, $2)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   encaps_list T_ENCAPSED_AND_WHITESPACE
             {
                 encapsed := scalar.NewEncapsedStringPart($2.Value)
@@ -4021,9 +5005,15 @@ encaps_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(encapsed, $2, comment.EncapsedAndWhitespaceToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   encaps_var
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   T_ENCAPSED_AND_WHITESPACE encaps_var
             {
                 encapsed := scalar.NewEncapsedStringPart($1.Value)
@@ -4034,6 +5024,8 @@ encaps_list:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(encapsed, $1, comment.EncapsedAndWhitespaceToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4049,6 +5041,8 @@ encaps_var:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE '[' encaps_var_offset ']'
             {
@@ -4065,6 +5059,8 @@ encaps_var:
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseSquareBracket)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE T_OBJECT_OPERATOR T_STRING
             {
@@ -4083,6 +5079,8 @@ encaps_var:
                 yylex.(*Parser).comments.AddFromToken(variable, $1, comment.VariableToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.ObjectOperatorToken)
                 yylex.(*Parser).comments.AddFromToken(fetch, $3, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DOLLAR_OPEN_CURLY_BRACES expr '}'
             {
@@ -4094,6 +5092,8 @@ encaps_var:
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DollarOpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DOLLAR_OPEN_CURLY_BRACES T_STRING_VARNAME '}'
             {
@@ -4108,6 +5108,8 @@ encaps_var:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.DollarOpenCurlyBracesToken)
                 yylex.(*Parser).comments.AddFromToken(name, $2, comment.StringVarnameToken)
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_DOLLAR_OPEN_CURLY_BRACES T_STRING_VARNAME '[' expr ']' '}'
             {
@@ -4126,10 +5128,14 @@ encaps_var:
                 yylex.(*Parser).comments.AddFromToken($$, $3, comment.OpenSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.CloseSquareBracket)
                 yylex.(*Parser).comments.AddFromToken($$, $6, comment.CloseCurlyBracesToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_CURLY_OPEN variable '}'
             {
                 $$ = $2;
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4143,6 +5149,8 @@ encaps_var_offset:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.StringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NUM_STRING
             {
@@ -4158,6 +5166,8 @@ encaps_var_offset:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.NumStringToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   '-' T_NUM_STRING
             {
@@ -4187,6 +5197,8 @@ encaps_var_offset:
                 } else {
                     yylex.(*Parser).comments.AddFromToken($$, $2, comment.NumStringToken)
                 }
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_VARIABLE
             {
@@ -4199,6 +5211,8 @@ encaps_var_offset:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.VariableToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
@@ -4217,6 +5231,8 @@ internal_functions_in_yacc:
                     yylex.(*Parser).comments.AddFromToken($$, $4, comment.CommaToken)
                 }
                 yylex.(*Parser).comments.AddFromToken($$, $5, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_EMPTY '(' expr ')'
             {
@@ -4229,6 +5245,8 @@ internal_functions_in_yacc:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.EmptyToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_INCLUDE expr
             {
@@ -4239,6 +5257,8 @@ internal_functions_in_yacc:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IncludeToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_INCLUDE_ONCE expr
             {
@@ -4249,6 +5269,8 @@ internal_functions_in_yacc:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.IncludeOnceToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_EVAL '(' expr ')'
             {
@@ -4261,6 +5283,8 @@ internal_functions_in_yacc:
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.EvalToken)
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
                 yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_REQUIRE expr
             {
@@ -4271,6 +5295,8 @@ internal_functions_in_yacc:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.RequireToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_REQUIRE_ONCE expr
             {
@@ -4281,24 +5307,36 @@ internal_functions_in_yacc:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.RequireOnceToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 isset_variables:
         isset_variable
-            { $$ = []node.Node{$1} }
+            {
+                $$ = []node.Node{$1}
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
     |   isset_variables ',' isset_variable
             {
                 $$ = append($1, $3)
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken(lastNode($1), $2, comment.CommaToken)
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
 ;
 
 isset_variable:
         expr
-            { $$ = $1 }
+            {
+                $$ = $1
+
+                yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
+            }
 ;
 
 /////////////////////////////////////////////////////////////////////////
diff --git a/scanner/lexer.go b/scanner/lexer.go
index 12b48ce..550f9b1 100644
--- a/scanner/lexer.go
+++ b/scanner/lexer.go
@@ -6,6 +6,7 @@ import (
 	"bytes"
 	"go/token"
 	"io"
+	"sync"
 	"unicode"
 
 	"github.com/z7zmey/php-parser/position"
@@ -443,6 +444,7 @@ type Lexer struct {
 	Comments      []*comment.Comment
 	heredocLabel  string
 	tokenBytesBuf *bytes.Buffer
+	TokenPool     sync.Pool
 }
 
 // Rune2Class returns the rune integer id
@@ -470,7 +472,12 @@ func NewLexer(src io.Reader, fName string) *Lexer {
 	if err != nil {
 		panic(err)
 	}
-	return &Lexer{lx, []int{0}, "", nil, "", &bytes.Buffer{}}
+
+	var TokenPool = sync.Pool{
+		New: func() interface{} { return &Token{} },
+	}
+
+	return &Lexer{lx, []int{0}, "", nil, "", &bytes.Buffer{}, TokenPool}
 }
 
 func (l *Lexer) ungetChars(n int) []lex.Char {
@@ -523,7 +530,14 @@ func (l *Lexer) createToken(chars []lex.Char) *Token {
 		int(lastChar.Pos()),
 	)
 
-	return NewToken(l.tokenString(chars), pos).SetComments(l.Comments)
+	token := l.TokenPool.Get().(*Token)
+	token.Position = pos
+	token.Comments = l.Comments
+	token.Value = l.tokenString(chars)
+
+	return token
+
+	// return NewToken(l.tokenString(chars), pos).SetComments(l.Comments)
 }
 
 func (l *Lexer) addComment(chars []lex.Char) {
diff --git a/scanner/token.go b/scanner/token.go
index d101bba..87e035a 100644
--- a/scanner/token.go
+++ b/scanner/token.go
@@ -8,35 +8,10 @@ import (
 // Token value returned by lexer
 type Token struct {
 	Value    string
-	position *position.Position
-	comments []*comment.Comment
-}
-
-// NewToken Token constructor
-func NewToken(value string, pos *position.Position) *Token {
-	return &Token{
-		Value:    value,
-		position: pos,
-		comments: nil,
-	}
+	Position *position.Position
+	Comments []*comment.Comment
 }
 
 func (t *Token) String() string {
 	return string(t.Value)
 }
-
-// Position returns token position
-func (t *Token) Position() *position.Position {
-	return t.position
-}
-
-// Comments returns attached comments
-func (t *Token) Comments() []*comment.Comment {
-	return t.comments
-}
-
-// SetComments attach comments
-func (t *Token) SetComments(comments []*comment.Comment) *Token {
-	t.comments = comments
-	return t
-}
diff --git a/scanner/token_test.go b/scanner/token_test.go
index 775b81d..7650789 100644
--- a/scanner/token_test.go
+++ b/scanner/token_test.go
@@ -13,15 +13,18 @@ import (
 
 func TestToken(t *testing.T) {
 	pos := position.NewPosition(1, 1, 0, 3)
-	tkn := scanner.NewToken(`foo`, pos)
+	tkn := &scanner.Token{
+		Value:    `foo`,
+		Position: pos,
+	}
 
 	c := []*comment.Comment{
 		comment.NewComment("test comment", nil),
 	}
 
-	tkn.SetComments(c)
+	tkn.Comments = c
 
-	if !reflect.DeepEqual(tkn.Comments(), c) {
+	if !reflect.DeepEqual(tkn.Comments, c) {
 		t.Errorf("comments are not equal\n")
 	}
 
@@ -29,7 +32,7 @@ func TestToken(t *testing.T) {
 		t.Errorf("token value is not equal\n")
 	}
 
-	if tkn.Position() != pos {
+	if tkn.Position != pos {
 		t.Errorf("token position is not equal\n")
 	}
 }