refactoring: create "ScalarEncapsedStringBrackets" node

internal/php5/parser_test.go

@@ -3975,14 +3975,14 @@ func TestScalarEncapsed_StringVarCurveOpen(t *testing.T) {
 								Value: []byte("$a"),
 							},
 						},
-						&ast.ParserBrackets{
+						&ast.ScalarEncapsedStringBrackets{
 							Position: &position.Position{
 								StartLine: 1,
 								EndLine:   1,
 								StartPos:  7,
 								EndPos:    11,
 							},
-							OpenBracketTkn: &token.Token{
+							OpenCurlyBracketTkn: &token.Token{
 								ID:    token.T_CURLY_OPEN,
 								Value: []byte("{"),
 								Position: &position.Position{
@@ -3992,7 +3992,7 @@ func TestScalarEncapsed_StringVarCurveOpen(t *testing.T) {
 									EndPos:    8,
 								},
 							},
-							Child: &ast.ExprVariable{
+							Var: &ast.ExprVariable{
 								Position: &position.Position{
 									StartLine: 1,
 									EndLine:   1,
@@ -4019,7 +4019,7 @@ func TestScalarEncapsed_StringVarCurveOpen(t *testing.T) {
 									Value: []byte("$b"),
 								},
 							},
-							CloseBracketTkn: &token.Token{
+							CloseCurlyBracketTkn: &token.Token{
 								ID:    token.ID(125),
 								Value: []byte("}"),
 								Position: &position.Position{
@@ -4690,14 +4690,14 @@ func TestScalarEncapsed_CurlyOpenMethodCall(t *testing.T) {
 							},
 							Value: []byte("test "),
 						},
-						&ast.ParserBrackets{
+						&ast.ScalarEncapsedStringBrackets{
 							Position: &position.Position{
 								StartLine: 1,
 								EndLine:   1,
 								StartPos:  9,
 								EndPos:    22,
 							},
-							OpenBracketTkn: &token.Token{
+							OpenCurlyBracketTkn: &token.Token{
 								ID:    token.T_CURLY_OPEN,
 								Value: []byte("{"),
 								Position: &position.Position{
@@ -4707,7 +4707,7 @@ func TestScalarEncapsed_CurlyOpenMethodCall(t *testing.T) {
 									EndPos:    10,
 								},
 							},
-							Child: &ast.ExprMethodCall{
+							Var: &ast.ExprMethodCall{
 								Position: &position.Position{
 									StartLine: 1,
 									EndLine:   1,
@@ -4791,7 +4791,7 @@ func TestScalarEncapsed_CurlyOpenMethodCall(t *testing.T) {
 									},
 								},
 							},
-							CloseBracketTkn: &token.Token{
+							CloseCurlyBracketTkn: &token.Token{
 								ID:    token.ID(125),
 								Value: []byte("}"),
 								Position: &position.Position{

internal/php5/php5.y

@@ -5450,11 +5450,11 @@ encaps_var:
             }
     |   T_CURLY_OPEN variable '}'
             {
-                $$ = &ast.ParserBrackets{
+                $$ = &ast.ScalarEncapsedStringBrackets{
-                    Position: yylex.(*Parser).builder.NewTokensPosition($1, $3),
+                    Position:             yylex.(*Parser).builder.NewTokensPosition($1, $3),
-                    OpenBracketTkn:  $1,
+                    OpenCurlyBracketTkn:  $1,
-                    Child:           $2,
+                    Var:                  $2,
-                    CloseBracketTkn: $3,
+                    CloseCurlyBracketTkn: $3,
                 }
             }
 ;

internal/php7/parser_test.go

@@ -4332,14 +4332,14 @@ func TestScalarEncapsed_StringVarCurveOpen(t *testing.T) {
 								Value: []byte("$a"),
 							},
 						},
-						&ast.ParserBrackets{
+						&ast.ScalarEncapsedStringBrackets{
 							Position: &position.Position{
 								StartLine: 1,
 								EndLine:   1,
 								StartPos:  7,
 								EndPos:    11,
 							},
-							OpenBracketTkn: &token.Token{
+							OpenCurlyBracketTkn: &token.Token{
 								ID:    token.T_CURLY_OPEN,
 								Value: []byte("{"),
 								Position: &position.Position{
@@ -4349,7 +4349,7 @@ func TestScalarEncapsed_StringVarCurveOpen(t *testing.T) {
 									EndPos:    8,
 								},
 							},
-							Child: &ast.ExprVariable{
+							Var: &ast.ExprVariable{
 								Position: &position.Position{
 									StartLine: 1,
 									EndLine:   1,
@@ -4376,7 +4376,7 @@ func TestScalarEncapsed_StringVarCurveOpen(t *testing.T) {
 									Value: []byte("$b"),
 								},
 							},
-							CloseBracketTkn: &token.Token{
+							CloseCurlyBracketTkn: &token.Token{
 								ID:    token.ID(125),
 								Value: []byte("}"),
 								Position: &position.Position{
@@ -5047,14 +5047,14 @@ func TestScalarEncapsed_CurlyOpenMethodCall(t *testing.T) {
 							},
 							Value: []byte("test "),
 						},
-						&ast.ParserBrackets{
+						&ast.ScalarEncapsedStringBrackets{
 							Position: &position.Position{
 								StartLine: 1,
 								EndLine:   1,
 								StartPos:  9,
 								EndPos:    22,
 							},
-							OpenBracketTkn: &token.Token{
+							OpenCurlyBracketTkn: &token.Token{
 								ID:    token.T_CURLY_OPEN,
 								Value: []byte("{"),
 								Position: &position.Position{
@@ -5064,7 +5064,7 @@ func TestScalarEncapsed_CurlyOpenMethodCall(t *testing.T) {
 									EndPos:    10,
 								},
 							},
-							Child: &ast.ExprMethodCall{
+							Var: &ast.ExprMethodCall{
 								Position: &position.Position{
 									StartLine: 1,
 									EndLine:   1,
@@ -5148,7 +5148,7 @@ func TestScalarEncapsed_CurlyOpenMethodCall(t *testing.T) {
 									},
 								},
 							},
-							CloseBracketTkn: &token.Token{
+							CloseCurlyBracketTkn: &token.Token{
 								ID:    token.ID(125),
 								Value: []byte("}"),
 								Position: &position.Position{

internal/php7/php7.y

@@ -4208,11 +4208,11 @@ encaps_var:
             }
     |   T_CURLY_OPEN variable '}'
             {
-                $$ = &ast.ParserBrackets{
+                $$ = &ast.ScalarEncapsedStringBrackets{
-                    Position: yylex.(*Parser).builder.NewTokensPosition($1, $3),
+                    Position:             yylex.(*Parser).builder.NewTokensPosition($1, $3),
-                    OpenBracketTkn:  $1,
+                    OpenCurlyBracketTkn:  $1,
-                    Child:           $2,
+                    Var:                  $2,
-                    CloseBracketTkn: $3,
+                    CloseCurlyBracketTkn: $3,
                 }
             }
 ;

pkg/ast/ast.go

@@ -176,6 +176,7 @@ type NodeVisitor interface {
 	ScalarEncapsed(n *ScalarEncapsed)
 	ScalarEncapsedStringPart(n *ScalarEncapsedStringPart)
 	ScalarEncapsedStringVar(n *ScalarEncapsedStringVar)
+	ScalarEncapsedStringBrackets(n *ScalarEncapsedStringBrackets)
 	ScalarHeredoc(n *ScalarHeredoc)
 	ScalarLnumber(n *ScalarLnumber)
 	ScalarMagicConstant(n *ScalarMagicConstant)
@@ -185,6 +186,4 @@ type NodeVisitor interface {
 	NameFullyQualified(n *NameFullyQualified)
 	NameRelative(n *NameRelative)
 	NameNamePart(n *NameNamePart)
-
-	ParserBrackets(n *ParserBrackets)
 }

pkg/ast/node.go

@@ -150,6 +150,22 @@ func (n *ScalarEncapsedStringVar) GetPosition() *position.Position {
 	return n.Position
 }
 
+// ScalarEncapsedStringVar node
+type ScalarEncapsedStringBrackets struct {
+	Position             *position.Position
+	OpenCurlyBracketTkn  *token.Token
+	Var                  Vertex
+	CloseCurlyBracketTkn *token.Token
+}
+
+func (n *ScalarEncapsedStringBrackets) Accept(v NodeVisitor) {
+	v.ScalarEncapsedStringBrackets(n)
+}
+
+func (n *ScalarEncapsedStringBrackets) GetPosition() *position.Position {
+	return n.Position
+}
+
 // ScalarHeredoc node
 type ScalarHeredoc struct {
 	Position        *position.Position
@@ -2695,7 +2711,7 @@ type ParserBrackets struct {
 }
 
 func (n *ParserBrackets) Accept(v NodeVisitor) {
-	v.ParserBrackets(n)
+	// do nothing
 }
 
 func (n *ParserBrackets) GetPosition() *position.Position {

pkg/ast/traverser/dfs.go

@@ -2472,6 +2472,18 @@ func (t *DFS) Traverse(n ast.Vertex) {
 			t.Traverse(nn.Dim)
 			t.visitor.Leave("Dim", true)
 		}
+	case *ast.ScalarEncapsedStringBrackets:
+		if nn == nil {
+			return
+		}
+		if !t.visitor.EnterNode(nn) {
+			return
+		}
+		if nn.Var != nil {
+			t.visitor.Enter("Var", true)
+			t.Traverse(nn.Var)
+			t.visitor.Leave("Var", true)
+		}
 	case *ast.ScalarHeredoc:
 		if nn == nil {
 			return
@@ -2556,18 +2568,6 @@ func (t *DFS) Traverse(n ast.Vertex) {
 		if !t.visitor.EnterNode(nn) {
 			return
 		}
-	case *ast.ParserBrackets:
-		if nn == nil {
-			return
-		}
-		if !t.visitor.EnterNode(nn) {
-			return
-		}
-		if nn.Child != nil {
-			t.visitor.Enter("Child", true)
-			t.Traverse(nn.Child)
-			t.visitor.Leave("Child", true)
-		}
 	default:
 		panic("unexpected type of node")
 	}

pkg/ast/visitor/dumper.go

@@ -2274,6 +2274,19 @@ func (v *Dumper) ScalarEncapsedStringVar(n *ast.ScalarEncapsedStringVar) {
 	v.print(v.indent, "},\n")
 }
 
+func (v *Dumper) ScalarEncapsedStringBrackets(n *ast.ScalarEncapsedStringBrackets) {
+	v.print(0, "&ast.ScalarEncapsedStringBrackets{\n")
+	v.indent++
+
+	v.dumpPosition(n.Position)
+	v.dumpToken("OpenCurlyBracketTkn", n.OpenCurlyBracketTkn)
+	v.dumpVertex("Var", n.Var)
+	v.dumpToken("CloseCurlyBracketTkn", n.CloseCurlyBracketTkn)
+
+	v.indent--
+	v.print(v.indent, "},\n")
+}
+
 func (v *Dumper) ScalarHeredoc(n *ast.ScalarHeredoc) {
 	v.print(0, "&ast.ScalarHeredoc{\n")
 	v.indent++
@@ -2374,16 +2387,3 @@ func (v *Dumper) NameNamePart(n *ast.NameNamePart) {
 	v.indent--
 	v.print(v.indent, "},\n")
 }
-
-func (v *Dumper) ParserBrackets(n *ast.ParserBrackets) {
-	v.print(0, "&ast.ParserBrackets{\n")
-	v.indent++
-
-	v.dumpPosition(n.Position)
-	v.dumpToken("OpenBracketTkn", n.OpenBracketTkn)
-	v.dumpVertex("Child", n.Child)
-	v.dumpToken("CloseBracketTkn", n.CloseBracketTkn)
-
-	v.indent--
-	v.print(v.indent, "},\n")
-}

pkg/ast/visitor/formatter.go

@@ -1985,6 +1985,12 @@ func (f *formatter) ScalarEncapsedStringVar(n *ast.ScalarEncapsedStringVar) {
 	n.CloseCurlyBracketTkn = f.newToken('}', []byte("}"))
 }
 
+func (f *formatter) ScalarEncapsedStringBrackets(n *ast.ScalarEncapsedStringBrackets) {
+	n.OpenCurlyBracketTkn = f.newToken('{', []byte("{"))
+	n.Var.Accept(f)
+	n.CloseCurlyBracketTkn = f.newToken('}', []byte("}"))
+}
+
 func (f *formatter) ScalarHeredoc(n *ast.ScalarHeredoc) {
 	n.OpenHeredocTkn = f.newToken(token.T_START_HEREDOC, []byte("<<<EOT\n"))
 	for _, p := range n.Parts {
@@ -2062,7 +2068,3 @@ func (f *formatter) NameNamePart(n *ast.NameNamePart) {
 		n.StringTkn.FreeFloating = f.getFreeFloating()
 	}
 }
-
-func (f *formatter) ParserBrackets(n *ast.ParserBrackets) {
-	// TODO
-}

pkg/ast/visitor/formatter_test.go

@@ -6694,6 +6694,31 @@ func TestFormatter_ScalarEncapsedStringVar_Dim(t *testing.T) {
 	}
 }
 
+func TestFormatter_ScalarEncapsedStringBrackets(t *testing.T) {
+	o := bytes.NewBufferString("")
+
+	n := &ast.ScalarEncapsedStringBrackets{
+		Var: &ast.ExprVariable{
+			VarName: &ast.Identifier{
+				Value: []byte("$foo"),
+			},
+		},
+	}
+
+	f := visitor.NewFormatter().WithState(visitor.FormatterStatePHP).WithIndent(1)
+	n.Accept(f)
+
+	p := visitor.NewPrinter(o).WithState(visitor.PrinterStatePHP)
+	n.Accept(p)
+
+	expected := `{$foo}`
+	actual := o.String()
+
+	if expected != actual {
+		t.Errorf("\nexpected: %s\ngot: %s\n", expected, actual)
+	}
+}
+
 func TestFormatter_ScalarHeredoc(t *testing.T) {
 	o := bytes.NewBufferString("")
 

pkg/ast/visitor/null.go

@@ -618,6 +618,10 @@ func (v *Null) ScalarEncapsedStringPart(_ *ast.ScalarEncapsedStringPart) {
 	// do nothing
 }
 
+func (v *Null) ScalarEncapsedStringBrackets(_ *ast.ScalarEncapsedStringBrackets) {
+	// do nothing
+}
+
 func (v *Null) ScalarEncapsedStringVar(_ *ast.ScalarEncapsedStringVar) {
 	// do nothing
 }
@@ -653,7 +657,3 @@ func (v *Null) NameRelative(_ *ast.NameRelative) {
 func (v *Null) NameNamePart(_ *ast.NameNamePart) {
 	// do nothing
 }
-
-func (v *Null) ParserBrackets(_ *ast.ParserBrackets) {
-	// do nothing
-}

pkg/ast/visitor/printer.go

@@ -1208,6 +1208,12 @@ func (p *printer) ScalarEncapsedStringVar(n *ast.ScalarEncapsedStringVar) {
 	p.printToken(n.CloseCurlyBracketTkn, []byte("}"))
 }
 
+func (p *printer) ScalarEncapsedStringBrackets(n *ast.ScalarEncapsedStringBrackets) {
+	p.printToken(n.OpenCurlyBracketTkn, []byte("{"))
+	p.printNode(n.Var)
+	p.printToken(n.CloseCurlyBracketTkn, []byte("}"))
+}
+
 func (p *printer) ScalarHeredoc(n *ast.ScalarHeredoc) {
 	p.printToken(n.OpenHeredocTkn, []byte("<<<EOT\n"))
 	p.printList(n.Parts)
@@ -1245,9 +1251,3 @@ func (p *printer) NameRelative(n *ast.NameRelative) {
 func (p *printer) NameNamePart(n *ast.NameNamePart) {
 	p.printToken(n.StringTkn, n.Value)
 }
-
-func (p *printer) ParserBrackets(n *ast.ParserBrackets) {
-	p.printToken(n.OpenBracketTkn, nil)
-	p.printNode(n.Child)
-	p.printToken(n.CloseBracketTkn, nil)
-}