create expr.Reference node

[wip] create expr.Reference node

[wip] create expr.Reference node

[wip] create expr.Reference node

fix

node/expr/n_array_item.go

@@ -7,15 +7,13 @@ import (
 
 // ArrayItem node
 type ArrayItem struct {
-	ByRef bool
 	Key node.Node
 	Val node.Node
 }
 
 // NewArrayItem node constructor
-func NewArrayItem(Key node.Node, Val node.Node, ByRef bool) *ArrayItem {
+func NewArrayItem(Key node.Node, Val node.Node) *ArrayItem {
 	return &ArrayItem{
-		ByRef,
 		Key,
 		Val,
 	}
@@ -23,9 +21,7 @@ func NewArrayItem(Key node.Node, Val node.Node, ByRef bool) *ArrayItem {
 
 // Attributes returns node attributes as map
 func (n *ArrayItem) Attributes() map[string]interface{} {
-	return map[string]interface{}{
+	return nil
-		"ByRef": n.ByRef,
-	}
 }
 
 // Walk traverses nodes

node/expr/n_closure_use.go

@@ -7,23 +7,19 @@ import (
 
 // ClosureUse node
 type ClosureUse struct {
-	ByRef    bool
 	Variable node.Node
 }
 
 // NewClosureUse node constructor
-func NewClosureUse(Variable node.Node, ByRef bool) *ClosureUse {
+func NewClosureUse(Variable node.Node) *ClosureUse {
 	return &ClosureUse{
-		ByRef,
 		Variable,
 	}
 }
 
 // Attributes returns node attributes as map
 func (n *ClosureUse) Attributes() map[string]interface{} {
-	return map[string]interface{}{
+	return nil
-		"ByRef": n.ByRef,
-	}
 }
 
 // Walk traverses nodes

node/expr/n_reference.go

@@ -0,0 +1,38 @@
+package expr
+
+import (
+	"github.com/z7zmey/php-parser/node"
+	"github.com/z7zmey/php-parser/walker"
+)
+
+// Reference node
+type Reference struct {
+	Variable node.Node
+}
+
+// NewReference node constructor
+func NewReference(Variable node.Node) *Reference {
+	return &Reference{
+		Variable,
+	}
+}
+
+// Attributes returns node attributes as map
+func (n *Reference) Attributes() map[string]interface{} {
+	return nil
+}
+
+// Walk traverses nodes
+// Walk is invoked recursively until v.EnterNode returns true
+func (n *Reference) Walk(v walker.Visitor) {
+	if v.EnterNode(n) == false {
+		return
+	}
+
+	if n.Variable != nil {
+		vv := v.GetChildrenVisitor("Variable")
+		n.Variable.Walk(vv)
+	}
+
+	v.LeaveNode(n)
+}

node/expr/t_array_test.go

@@ -47,7 +47,6 @@ func TestArrayItem(t *testing.T) {
 				Expr: &expr.Array{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 					},
@@ -76,13 +75,11 @@ func TestArrayItems(t *testing.T) {
 				Expr: &expr.Array{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Key: &scalar.Lnumber{Value: "1"},
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 						&expr.ArrayItem{
-							ByRef: true,
+							Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "b"}}},
-							Val:   &expr.Variable{VarName: &node.Identifier{Value: "b"}},
 						},
 					},
 				},

node/expr/t_closure_test.go

@@ -66,12 +66,10 @@ func TestClosureUse(t *testing.T) {
 					},
 					Uses: []node.Node{
 						&expr.ClosureUse{
-							ByRef:    false,
 							Variable: &expr.Variable{VarName: &node.Identifier{Value: "c"}},
 						},
 						&expr.ClosureUse{
-							ByRef:    true,
+							Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "d"}}},
-							Variable: &expr.Variable{VarName: &node.Identifier{Value: "d"}},
 						},
 					},
 					Stmts: []node.Node{},
@@ -115,11 +113,9 @@ func TestClosureUse2(t *testing.T) {
 					},
 					Uses: []node.Node{
 						&expr.ClosureUse{
-							ByRef:    true,
+							Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "c"}}},
-							Variable: &expr.Variable{VarName: &node.Identifier{Value: "c"}},
 						},
 						&expr.ClosureUse{
-							ByRef:    false,
 							Variable: &expr.Variable{VarName: &node.Identifier{Value: "d"}},
 						},
 					},

node/expr/t_list_test.go

@@ -51,7 +51,6 @@ func TestList(t *testing.T) {
 					Variable: &expr.List{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 							},
 						},
@@ -83,7 +82,6 @@ func TestListArrayIndex(t *testing.T) {
 					Variable: &expr.List{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.ArrayDimFetch{
 									Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 								},
@@ -117,11 +115,9 @@ func TestListList(t *testing.T) {
 					Variable: &expr.List{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.List{
 									Items: []node.Node{
 										&expr.ArrayItem{
-											ByRef: false,
 											Val: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 										},
 									},

node/expr/t_reference_test.go

@@ -0,0 +1,41 @@
+package expr_test
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/z7zmey/php-parser/node/expr"
+
+	"github.com/z7zmey/php-parser/node"
+	"github.com/z7zmey/php-parser/node/stmt"
+	"github.com/z7zmey/php-parser/php5"
+	"github.com/z7zmey/php-parser/php7"
+)
+
+func TestForeachWithRef(t *testing.T) {
+	t.Helper()
+	src := `<? foreach ($a as $k => &$v) {}`
+
+	expected := &node.Root{
+		Stmts: []node.Node{
+			&stmt.Foreach{
+				Expr:     &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+				Key:      &expr.Variable{VarName: &node.Identifier{Value: "k"}},
+				Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "v"}}},
+				Stmt: &stmt.StmtList{
+					Stmts: []node.Node{},
+				},
+			},
+		},
+	}
+
+	php7parser := php7.NewParser(bytes.NewBufferString(src), "test.php")
+	php7parser.Parse()
+	actual := php7parser.GetRootNode()
+	assertEqual(t, expected, actual)
+
+	php5parser := php5.NewParser(bytes.NewBufferString(src), "test.php")
+	php5parser.Parse()
+	actual = php5parser.GetRootNode()
+	assertEqual(t, expected, actual)
+}

node/expr/t_short_array_test.go

@@ -47,7 +47,6 @@ func TestShortArrayItem(t *testing.T) {
 				Expr: &expr.ShortArray{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 					},
@@ -76,13 +75,11 @@ func TestShortArrayItems(t *testing.T) {
 				Expr: &expr.ShortArray{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Key: &scalar.Lnumber{Value: "1"},
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 						&expr.ArrayItem{
-							ByRef: true,
+							Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "b"}}},
-							Val:   &expr.Variable{VarName: &node.Identifier{Value: "b"}},
 						},
 					},
 				},

node/expr/t_short_list_test.go

@@ -23,7 +23,6 @@ func TestShortList(t *testing.T) {
 					Variable: &expr.ShortList{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 							},
 						},
@@ -50,7 +49,6 @@ func TestShortListArrayIndex(t *testing.T) {
 					Variable: &expr.ShortList{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.ArrayDimFetch{
 									Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 								},
@@ -79,11 +77,9 @@ func TestShortListList(t *testing.T) {
 					Variable: &expr.ShortList{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.List{
 									Items: []node.Node{
 										&expr.ArrayItem{
-											ByRef: false,
 											Val: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 										},
 									},

node/expr/t_visitor_test.go

@@ -32,18 +32,16 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.ArrayItem{
-			ByRef: false,
 			Key: &scalar.String{Value: "key"},
 			Val: &scalar.Lnumber{Value: "1"},
 		},
 		[]string{"Key", "Val"},
-		map[string]interface{}{"ByRef": false},
+		map[string]interface{}{},
 	},
 	{
 		&expr.Array{
 			Items: []node.Node{
 				&expr.ArrayItem{
-					ByRef: false,
 					Key: &scalar.String{Value: "key"},
 					Val: &scalar.Lnumber{Value: "1"},
 				},
@@ -83,11 +81,10 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.ClosureUse{
-			ByRef:    false,
 			Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 		},
 		[]string{"Variable"},
-		map[string]interface{}{"ByRef": false},
+		map[string]interface{}{},
 	},
 	{
 		&expr.Closure{
@@ -252,6 +249,13 @@ var nodesToTest = []struct {
 		[]string{"Variable", "Property"},
 		map[string]interface{}{},
 	},
+	{
+		&expr.Reference{
+			Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+		},
+		[]string{"Variable"},
+		map[string]interface{}{},
+	},
 	{
 		&expr.RequireOnce{
 			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},

node/stmt/n_alt_foreach.go

@@ -7,7 +7,6 @@ import (
 
 // AltForeach node
 type AltForeach struct {
-	ByRef    bool
 	Expr     node.Node
 	Key      node.Node
 	Variable node.Node
@@ -15,9 +14,8 @@ type AltForeach struct {
 }
 
 // NewAltForeach node constructor
-func NewAltForeach(Expr node.Node, Key node.Node, Variable node.Node, Stmt node.Node, ByRef bool) *AltForeach {
+func NewAltForeach(Expr node.Node, Key node.Node, Variable node.Node, Stmt node.Node) *AltForeach {
 	return &AltForeach{
-		ByRef,
 		Expr,
 		Key,
 		Variable,
@@ -27,9 +25,7 @@ func NewAltForeach(Expr node.Node, Key node.Node, Variable node.Node, Stmt node.
 
 // Attributes returns node attributes as map
 func (n *AltForeach) Attributes() map[string]interface{} {
-	return map[string]interface{}{
+	return nil
-		"ByRef": n.ByRef,
-	}
 }
 
 // Walk traverses nodes

node/stmt/n_foreach.go

@@ -7,7 +7,6 @@ import (
 
 // Foreach node
 type Foreach struct {
-	ByRef    bool
 	Expr     node.Node
 	Key      node.Node
 	Variable node.Node
@@ -15,9 +14,8 @@ type Foreach struct {
 }
 
 // NewForeach node constructor
-func NewForeach(Expr node.Node, Key node.Node, Variable node.Node, Stmt node.Node, ByRef bool) *Foreach {
+func NewForeach(Expr node.Node, Key node.Node, Variable node.Node, Stmt node.Node) *Foreach {
 	return &Foreach{
-		ByRef,
 		Expr,
 		Key,
 		Variable,
@@ -27,9 +25,7 @@ func NewForeach(Expr node.Node, Key node.Node, Variable node.Node, Stmt node.Nod
 
 // Attributes returns node attributes as map
 func (n *Foreach) Attributes() map[string]interface{} {
-	return map[string]interface{}{
+	return nil
-		"ByRef": n.ByRef,
-	}
 }
 
 // Walk traverses nodes

node/stmt/t_foreach_test.go

@@ -140,10 +140,9 @@ func TestForeachWithRef(t *testing.T) {
 	expected := &node.Root{
 		Stmts: []node.Node{
 			&stmt.Foreach{
-				ByRef:    true,
 				Expr:     &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 				Key:      &expr.Variable{VarName: &node.Identifier{Value: "k"}},
-				Variable: &expr.Variable{VarName: &node.Identifier{Value: "v"}},
+				Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "v"}}},
 				Stmt:     &stmt.StmtList{Stmts: []node.Node{}},
 			},
 		},
@@ -166,13 +165,11 @@ func TestForeachWithList(t *testing.T) {
 	expected := &node.Root{
 		Stmts: []node.Node{
 			&stmt.Foreach{
-				ByRef: false,
 				Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 				Key:  &expr.Variable{VarName: &node.Identifier{Value: "k"}},
 				Variable: &expr.List{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &expr.Variable{VarName: &node.Identifier{Value: "v"}},
 						},
 					},

node/stmt/t_visitor_test.go

@@ -224,25 +224,23 @@ var nodesToTest = []struct {
 	},
 	{
 		&stmt.Foreach{
-			ByRef:    true,
 			Expr:     &stmt.Expression{},
 			Key:      &expr.Variable{},
 			Variable: &expr.Variable{},
 			Stmt:     &stmt.StmtList{},
 		},
 		[]string{"Expr", "Key", "Variable", "Stmt"},
-		map[string]interface{}{"ByRef": true},
+		map[string]interface{}{},
 	},
 	{
 		&stmt.AltForeach{
-			ByRef:    true,
 			Expr:     &stmt.Expression{},
 			Key:      &expr.Variable{},
 			Variable: &expr.Variable{},
 			Stmt:     &stmt.StmtList{},
 		},
 		[]string{"Expr", "Key", "Variable", "Stmt"},
-		map[string]interface{}{"ByRef": true},
+		map[string]interface{}{},
 	},
 	{
 		&stmt.Function{

php5/php5.y

@@ -22,7 +22,6 @@ import (
     node                    node.Node
     token                   *scanner.Token
     list                    []node.Node
-    foreachVariable         foreachVariable
     simpleIndirectReference simpleIndirectReference
 
     ClassExtends            *stmt.ClassExtends
@@ -248,6 +247,8 @@ import (
 %type <node> switch_case_list
 %type <node> method_body
 %type <node> foreach_statement for_statement while_statement
+%type <node> foreach_variable foreach_optional_arg
+
 %type <ClassExtends> extends_from
 %type <ClassImplements> implements_list
 %type <InterfaceExtends> interface_extends_list
@@ -266,7 +267,6 @@ import (
 %type <list> dynamic_class_name_variable_properties variable_properties
 
 %type <simpleIndirectReference> simple_indirect_reference
-%type <foreachVariable> foreach_variable foreach_optional_arg
 %type <token> is_reference is_variadic
 
 %%
@@ -801,29 +801,25 @@ unticked_statement:
             }
     |   T_FOREACH '(' variable T_AS foreach_variable foreach_optional_arg ')' foreach_statement
             {
-                if $6.node == nil {
+                if $6 == nil {
                     switch n := $8.(type) {
                     case *stmt.Foreach :
                         n.Expr = $3
-                        n.ByRef = $5.byRef
+                        n.Variable = $5
-                        n.Variable = $5.node
                     case *stmt.AltForeach :
                         n.Expr = $3
-                        n.ByRef = $5.byRef
+                        n.Variable = $5
-                        n.Variable = $5.node
                     }
                 } else {
                     switch n := $8.(type) {
                     case *stmt.Foreach :
                         n.Expr = $3
-                        n.Key = $5.node
+                        n.Key = $5
-                        n.ByRef = $6.byRef
+                        n.Variable = $6
-                        n.Variable = $6.node
                     case *stmt.AltForeach :
                         n.Expr = $3
-                        n.Key = $5.node
+                        n.Key = $5
-                        n.ByRef = $6.byRef
+                        n.Variable = $6
-                        n.Variable = $6.node
                     }
                 }
                 
@@ -834,29 +830,25 @@ unticked_statement:
             }
     |   T_FOREACH '(' expr_without_variable T_AS foreach_variable foreach_optional_arg ')' foreach_statement
             {
-                if $6.node == nil {
+                if $6 == nil {
                     switch n := $8.(type) {
                     case *stmt.Foreach :
                         n.Expr = $3
-                        n.ByRef = $5.byRef
+                        n.Variable = $5
-                        n.Variable = $5.node
                     case *stmt.AltForeach :
                         n.Expr = $3
-                        n.ByRef = $5.byRef
+                        n.Variable = $5
-                        n.Variable = $5.node
                     }
                 } else {
                     switch n := $8.(type) {
                     case *stmt.Foreach :
                         n.Expr = $3
-                        n.Key = $5.node
+                        n.Key = $5
-                        n.ByRef = $6.byRef
+                        n.Variable = $6
-                        n.Variable = $6.node
                     case *stmt.AltForeach :
                         n.Expr = $3
-                        n.Key = $5.node
+                        n.Key = $5
-                        n.ByRef = $6.byRef
+                        n.Variable = $6
-                        n.Variable = $6.node
                     }
                 }
                 
@@ -1138,21 +1130,21 @@ interface_list:
 
 foreach_optional_arg:
         /* empty */
-            { $$ = foreachVariable{nil, false} }
+            { $$ = nil }
     |   T_DOUBLE_ARROW foreach_variable
             { $$ = $2 }
 ;
 
 foreach_variable:
         variable
-            { $$ = foreachVariable{$1, false} }
+            { $$ = $1 }
     |   '&' variable
-            { $$ = foreachVariable{$2, true} }
+            { $$ = expr.NewReference($2) }
     |   T_LIST '(' assignment_list ')'
             {
                 list := expr.NewList($3)
                 yylex.(*Parser).positions.AddPosition(list, yylex.(*Parser).positionBuilder.NewTokensPosition($1, $4))
-                $$ = foreachVariable{list, false}
+                $$ = list
                 yylex.(*Parser).comments.AddComments(list, $1.Comments())
             }
 ;
@@ -1177,13 +1169,13 @@ for_statement:
 foreach_statement:
         statement
             {
-                $$ = stmt.NewForeach(nil, nil, nil, $1, false)
+                $$ = stmt.NewForeach(nil, nil, nil, $1)
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
             }
     |   ':' inner_statement_list T_ENDFOREACH ';'
             {
                 stmtList := stmt.NewStmtList($2)
-                $$ = stmt.NewAltForeach(nil, nil, nil, stmtList, false)
+                $$ = stmt.NewAltForeach(nil, nil, nil, stmtList)
 
                 yylex.(*Parser).positions.AddPosition(stmtList, yylex.(*Parser).positionBuilder.NewNodeListPosition($2))
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewTokensPosition($1, $4))
@@ -2613,7 +2605,7 @@ lexical_var_list:
                 yylex.(*Parser).positions.AddPosition(variable, yylex.(*Parser).positionBuilder.NewTokenPosition($3))
                 yylex.(*Parser).comments.AddComments(variable, $3.Comments())
                 
-                use := expr.NewClosureUse(variable, false)
+                use := expr.NewClosureUse(variable)
                 yylex.(*Parser).positions.AddPosition(use, yylex.(*Parser).positionBuilder.NewTokenPosition($3))
                 yylex.(*Parser).comments.AddComments(use, $3.Comments())
                 
@@ -2629,7 +2621,9 @@ lexical_var_list:
                 yylex.(*Parser).positions.AddPosition(variable, yylex.(*Parser).positionBuilder.NewTokenPosition($4))
                 yylex.(*Parser).comments.AddComments(variable, $3.Comments())
 
-                use := expr.NewClosureUse(variable, true)
+                reference := expr.NewReference(variable)
+
+                use := expr.NewClosureUse(reference)
                 yylex.(*Parser).positions.AddPosition(use, yylex.(*Parser).positionBuilder.NewTokensPosition($3, $4))
                 yylex.(*Parser).comments.AddComments(use, $3.Comments())
 
@@ -2645,7 +2639,7 @@ lexical_var_list:
                 yylex.(*Parser).positions.AddPosition(variable, yylex.(*Parser).positionBuilder.NewTokenPosition($1))
                 yylex.(*Parser).comments.AddComments(variable, $1.Comments())
                 
-                use := expr.NewClosureUse(variable, false)
+                use := expr.NewClosureUse(variable)
                 yylex.(*Parser).positions.AddPosition(use, yylex.(*Parser).positionBuilder.NewTokenPosition($1))
                 yylex.(*Parser).comments.AddComments(use, $1.Comments())
                 
@@ -2661,7 +2655,9 @@ lexical_var_list:
                 yylex.(*Parser).positions.AddPosition(variable, yylex.(*Parser).positionBuilder.NewTokenPosition($2))
                 yylex.(*Parser).comments.AddComments(variable, $1.Comments())
 
-                use := expr.NewClosureUse(variable, true)
+                reference := expr.NewReference(variable)
+
+                use := expr.NewClosureUse(reference)
                 yylex.(*Parser).positions.AddPosition(use, yylex.(*Parser).positionBuilder.NewTokensPosition($1, $2))
                 yylex.(*Parser).comments.AddComments(use, $1.Comments())
 
@@ -3307,7 +3303,7 @@ possible_comma:
 non_empty_static_array_pair_list:
         non_empty_static_array_pair_list ',' static_scalar_value T_DOUBLE_ARROW static_scalar_value
             {
-                arrayItem := expr.NewArrayItem($3, $5, false)
+                arrayItem := expr.NewArrayItem($3, $5)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodesPosition($3, $5))
                 yylex.(*Parser).comments.AddComments(arrayItem, yylex.(*Parser).comments[$3])
 
@@ -3315,7 +3311,7 @@ non_empty_static_array_pair_list:
             }
     |   non_empty_static_array_pair_list ',' static_scalar_value
             {
-                arrayItem := expr.NewArrayItem(nil, $3, false)
+                arrayItem := expr.NewArrayItem(nil, $3)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodePosition($3))
                 yylex.(*Parser).comments.AddComments(arrayItem, yylex.(*Parser).comments[$3])
 
@@ -3323,7 +3319,7 @@ non_empty_static_array_pair_list:
             }
     |   static_scalar_value T_DOUBLE_ARROW static_scalar_value
             {
-                arrayItem := expr.NewArrayItem($1, $3, false)
+                arrayItem := expr.NewArrayItem($1, $3)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodesPosition($1, $3))
                 yylex.(*Parser).comments.AddComments(arrayItem, yylex.(*Parser).comments[$1])
 
@@ -3331,7 +3327,7 @@ non_empty_static_array_pair_list:
             }
     |   static_scalar_value
             {
-                arrayItem := expr.NewArrayItem(nil, $1, false)
+                arrayItem := expr.NewArrayItem(nil, $1)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodePosition($1))
                 yylex.(*Parser).comments.AddComments(arrayItem, yylex.(*Parser).comments[$1])
 
@@ -3689,7 +3685,7 @@ assignment_list:
 assignment_list_element:
         variable
             {
-                $$ = expr.NewArrayItem(nil, $1, false)
+                $$ = expr.NewArrayItem(nil, $1)
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
                 yylex.(*Parser).comments.AddComments($$, yylex.(*Parser).comments[$1])
             }
@@ -3699,7 +3695,7 @@ assignment_list_element:
                 yylex.(*Parser).positions.AddPosition(item, yylex.(*Parser).positionBuilder.NewTokensPosition($1, $4))
                 yylex.(*Parser).comments.AddComments(item, $1.Comments())
 
-                $$ = expr.NewArrayItem(nil, item, false)
+                $$ = expr.NewArrayItem(nil, item)
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition(item))
                 yylex.(*Parser).comments.AddComments($$, yylex.(*Parser).comments[item])
             }
@@ -3718,7 +3714,7 @@ array_pair_list:
 non_empty_array_pair_list:
         non_empty_array_pair_list ',' expr T_DOUBLE_ARROW expr
             {
-                arrayItem := expr.NewArrayItem($3, $5, false)
+                arrayItem := expr.NewArrayItem($3, $5)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodesPosition($3, $5))
                 yylex.(*Parser).comments.AddComments(arrayItem, yylex.(*Parser).comments[$3])
 
@@ -3726,7 +3722,7 @@ non_empty_array_pair_list:
             }
     |   non_empty_array_pair_list ',' expr
             {
-                arrayItem := expr.NewArrayItem(nil, $3, false)
+                arrayItem := expr.NewArrayItem(nil, $3)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodePosition($3))
                 yylex.(*Parser).comments.AddComments(arrayItem, yylex.(*Parser).comments[$3])
 
@@ -3734,7 +3730,7 @@ non_empty_array_pair_list:
             }
     |   expr T_DOUBLE_ARROW expr
             {
-                arrayItem := expr.NewArrayItem($1, $3, false)
+                arrayItem := expr.NewArrayItem($1, $3)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodesPosition($1, $3))
                 yylex.(*Parser).comments.AddComments(arrayItem, yylex.(*Parser).comments[$1])
 
@@ -3742,7 +3738,7 @@ non_empty_array_pair_list:
             }
     |   expr
             {
-                arrayItem := expr.NewArrayItem(nil, $1, false)
+                arrayItem := expr.NewArrayItem(nil, $1)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodePosition($1))
                 yylex.(*Parser).comments.AddComments(arrayItem, yylex.(*Parser).comments[$1])
 
@@ -3750,7 +3746,8 @@ non_empty_array_pair_list:
             }
     |   non_empty_array_pair_list ',' expr T_DOUBLE_ARROW '&' w_variable
             {
-                arrayItem := expr.NewArrayItem($3, $6, true)
+                reference := expr.NewReference($6)
+                arrayItem := expr.NewArrayItem($3, reference)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodesPosition($3, $6))
                 yylex.(*Parser).comments.AddComments(arrayItem, yylex.(*Parser).comments[$3])
 
@@ -3758,7 +3755,8 @@ non_empty_array_pair_list:
             }
     |   non_empty_array_pair_list ',' '&' w_variable
             {
-                arrayItem := expr.NewArrayItem(nil, $4, true)
+                reference := expr.NewReference($4)
+                arrayItem := expr.NewArrayItem(nil, reference)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewTokenNodePosition($3, $4))
                 yylex.(*Parser).comments.AddComments(arrayItem, $3.Comments())
 
@@ -3766,7 +3764,8 @@ non_empty_array_pair_list:
             }
     |   expr T_DOUBLE_ARROW '&' w_variable
             {
-                arrayItem := expr.NewArrayItem($1, $4, true)
+                reference := expr.NewReference($4)
+                arrayItem := expr.NewArrayItem($1, reference)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewNodesPosition($1, $4))
                 yylex.(*Parser).comments.AddComments(arrayItem, yylex.(*Parser).comments[$1])
 
@@ -3774,7 +3773,8 @@ non_empty_array_pair_list:
             }
     |   '&' w_variable
             {
-                arrayItem := expr.NewArrayItem(nil, $2, true)
+                reference := expr.NewReference($2)
+                arrayItem := expr.NewArrayItem(nil, reference)
                 yylex.(*Parser).positions.AddPosition(arrayItem, yylex.(*Parser).positionBuilder.NewTokenNodePosition($1, $2))
                 yylex.(*Parser).comments.AddComments(arrayItem, $1.Comments())
 
@@ -4014,11 +4014,6 @@ class_name_scalar:
 
 %%
 
-type foreachVariable struct {
-	node  node.Node
-	byRef bool
-}
-
 type simpleIndirectReference struct {
 	all  []*expr.Variable
 	last *expr.Variable

php5/php5_test.go

@@ -1065,20 +1065,19 @@ func TestPhp5(t *testing.T) {
 				Stmt:     &stmt.StmtList{Stmts: []node.Node{}},
 			},
 			&stmt.Foreach{
-				ByRef:    true,
 				Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 				Key:  &expr.Variable{VarName: &node.Identifier{Value: "k"}},
+				Variable: &expr.Reference{
 					Variable: &expr.Variable{VarName: &node.Identifier{Value: "v"}},
+				},
 				Stmt: &stmt.StmtList{Stmts: []node.Node{}},
 			},
 			&stmt.Foreach{
-				ByRef: false,
 				Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 				Key:  &expr.Variable{VarName: &node.Identifier{Value: "k"}},
 				Variable: &expr.List{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &expr.Variable{VarName: &node.Identifier{Value: "v"}},
 						},
 					},
@@ -1905,7 +1904,6 @@ func TestPhp5(t *testing.T) {
 				Expr: &expr.Array{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 					},
@@ -1915,13 +1913,11 @@ func TestPhp5(t *testing.T) {
 				Expr: &expr.Array{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Key: &scalar.Lnumber{Value: "1"},
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 						&expr.ArrayItem{
-							ByRef: true,
+							Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "b"}}},
-							Val:   &expr.Variable{VarName: &node.Identifier{Value: "b"}},
 						},
 					},
 				},
@@ -1930,9 +1926,8 @@ func TestPhp5(t *testing.T) {
 				Expr: &expr.Array{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: true,
 							Key: &scalar.Lnumber{Value: "3"},
-							Val:   &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+							Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "b"}}},
 						},
 					},
 				},
@@ -1941,22 +1936,18 @@ func TestPhp5(t *testing.T) {
 				Expr: &expr.Array{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: true,
+							Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "b"}}},
-							Val:   &expr.Variable{VarName: &node.Identifier{Value: "b"}},
 						},
 						&expr.ArrayItem{
-							ByRef: false,
 							Key: &scalar.Lnumber{Value: "1"},
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 						&expr.ArrayItem{
-							ByRef: true,
 							Key: &scalar.Lnumber{Value: "3"},
-							Val:   &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+							Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "b"}}},
 						},
 					},
 				},
@@ -2019,12 +2010,10 @@ func TestPhp5(t *testing.T) {
 					},
 					Uses: []node.Node{
 						&expr.ClosureUse{
-							ByRef:    false,
 							Variable: &expr.Variable{VarName: &node.Identifier{Value: "c"}},
 						},
 						&expr.ClosureUse{
-							ByRef:    true,
+							Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "d"}}},
-							Variable: &expr.Variable{VarName: &node.Identifier{Value: "d"}},
 						},
 					},
 					Stmts: []node.Node{},
@@ -2049,11 +2038,9 @@ func TestPhp5(t *testing.T) {
 					},
 					Uses: []node.Node{
 						&expr.ClosureUse{
-							ByRef:    true,
+							Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "c"}}},
-							Variable: &expr.Variable{VarName: &node.Identifier{Value: "c"}},
 						},
 						&expr.ClosureUse{
-							ByRef:    false,
 							Variable: &expr.Variable{VarName: &node.Identifier{Value: "d"}},
 						},
 					},
@@ -2286,11 +2273,9 @@ func TestPhp5(t *testing.T) {
 					Variable: &expr.List{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 							},
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
 							},
 						},
@@ -2303,7 +2288,6 @@ func TestPhp5(t *testing.T) {
 					Variable: &expr.List{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.ArrayDimFetch{
 									Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 								},
@@ -2318,11 +2302,9 @@ func TestPhp5(t *testing.T) {
 					Variable: &expr.List{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.List{
 									Items: []node.Node{
 										&expr.ArrayItem{
-											ByRef: false,
 											Val: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 										},
 									},
@@ -2450,7 +2432,6 @@ func TestPhp5(t *testing.T) {
 				Expr: &expr.ShortArray{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 					},
@@ -2460,13 +2441,11 @@ func TestPhp5(t *testing.T) {
 				Expr: &expr.ShortArray{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Key: &scalar.Lnumber{Value: "1"},
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 						&expr.ArrayItem{
-							ByRef: true,
+							Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "b"}}},
-							Val:   &expr.Variable{VarName: &node.Identifier{Value: "b"}},
 						},
 					},
 				},
@@ -3025,11 +3004,9 @@ func TestPhp5(t *testing.T) {
 						Variable: &expr.Array{
 							Items: []node.Node{
 								&expr.ArrayItem{
-									ByRef: false,
 									Val: &expr.ShortArray{
 										Items: []node.Node{
 											&expr.ArrayItem{
-												ByRef: false,
 												Val: &scalar.Lnumber{Value: "0"},
 											},
 										},
@@ -3127,7 +3104,6 @@ func TestPhp5(t *testing.T) {
 							Variable: &expr.ShortArray{
 								Items: []node.Node{
 									&expr.ArrayItem{
-										ByRef: false,
 										Val: &scalar.Lnumber{Value: "1"},
 									},
 								},
@@ -3578,12 +3554,10 @@ func TestPhp5(t *testing.T) {
 						Expr: &expr.Array{
 							Items: []node.Node{
 								&expr.ArrayItem{
-									ByRef: false,
 									Key: &scalar.Lnumber{Value: "1"},
 									Val: &scalar.Lnumber{Value: "1"},
 								},
 								&expr.ArrayItem{
-									ByRef: false,
 									Val: &scalar.Lnumber{Value: "2"},
 								},
 							},
@@ -3599,11 +3573,9 @@ func TestPhp5(t *testing.T) {
 							Variable: &expr.ShortArray{
 								Items: []node.Node{
 									&expr.ArrayItem{
-										ByRef: false,
 										Val: &scalar.Lnumber{Value: "1"},
 									},
 									&expr.ArrayItem{
-										ByRef: false,
 										Key: &scalar.Lnumber{Value: "2"},
 										Val: &scalar.Lnumber{Value: "2"},
 									},

php7/php7.y

@@ -23,7 +23,6 @@ import (
     node             node.Node
     token            *scanner.Token
     list             []node.Node
-    foreachVariable  foreachVariable
     str              string
 
     ClassExtends     *stmt.ClassExtends
@@ -275,7 +274,7 @@ import (
 
 %type <node> member_modifier
 %type <node> use_type
-%type <foreachVariable> foreach_variable
+%type <node> foreach_variable
 
 
 %type <list> encaps_list backticks_expr namespace_name catch_name_list catch_list class_const_list
@@ -963,12 +962,10 @@ statement:
                 switch n := $7.(type) {
                 case *stmt.Foreach :
                     n.Expr = $3
-                    n.ByRef = $5.byRef
+                    n.Variable = $5
-                    n.Variable = $5.node
                 case *stmt.AltForeach :
                     n.Expr = $3
-                    n.ByRef = $5.byRef
+                    n.Variable = $5
-                    n.Variable = $5.node
                 }
 
                 $$ = $7
@@ -988,13 +985,11 @@ statement:
                 case *stmt.Foreach :
                     n.Expr = $3
                     n.Key = $5
-                    n.ByRef = $7.byRef
+                    n.Variable = $7
-                    n.Variable = $7.node
                 case *stmt.AltForeach :
                     n.Expr = $3
                     n.Key = $5
-                    n.ByRef = $7.byRef
+                    n.Variable = $7
-                    n.Variable = $7.node
                 }
 
                 $$ = $9
@@ -1339,41 +1334,41 @@ implements_list:
 
 foreach_variable:
         variable
-            { $$ = foreachVariable{$1, false} }
+            {
+                $$ = $1
+            }
     |   '&' variable
             {
-                $$ = foreachVariable{$2, true}
+                $$ = expr.NewReference($2)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($2, yylex.(*Parser).positionBuilder.NewTokenNodePosition($1, $2))
 
                 // save comments
-                yylex.(*Parser).comments.AddFromToken($2, $1, comment.AmpersandToken)
+                yylex.(*Parser).comments.AddFromToken($$, $1, comment.AmpersandToken)
             }
     |   T_LIST '(' array_pair_list ')'
             {
-                list := expr.NewList($3)
+                $$ = expr.NewList($3)
-                $$ = foreachVariable{list, false}
 
                 // save position
-                yylex.(*Parser).positions.AddPosition(list, yylex.(*Parser).positionBuilder.NewTokensPosition($1, $4))
+                yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewTokensPosition($1, $4))
 
                 // save comments
-                yylex.(*Parser).comments.AddFromToken(list, $1, comment.ListToken)
+                yylex.(*Parser).comments.AddFromToken($$, $1, comment.ListToken)
-                yylex.(*Parser).comments.AddFromToken(list, $2, comment.OpenParenthesisToken)
+                yylex.(*Parser).comments.AddFromToken($$, $2, comment.OpenParenthesisToken)
-                yylex.(*Parser).comments.AddFromToken(list, $4, comment.CloseParenthesisToken)
+                yylex.(*Parser).comments.AddFromToken($$, $4, comment.CloseParenthesisToken)
             }
     |   '[' array_pair_list ']'
             {
-                list := expr.NewShortList($2)
+                $$ = expr.NewShortList($2)
-                $$ = foreachVariable{list, false}
 
                 // save position
-                yylex.(*Parser).positions.AddPosition(list, yylex.(*Parser).positionBuilder.NewTokensPosition($1, $3))
+                yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewTokensPosition($1, $3))
 
                 // save comments
-                yylex.(*Parser).comments.AddFromToken(list, $1, comment.OpenSquareBracket)
+                yylex.(*Parser).comments.AddFromToken($$, $1, comment.OpenSquareBracket)
-                yylex.(*Parser).comments.AddFromToken(list, $3, comment.CloseSquareBracket)
+                yylex.(*Parser).comments.AddFromToken($$, $3, comment.CloseSquareBracket)
             }
 ;
 
@@ -1404,7 +1399,7 @@ for_statement:
 foreach_statement:
         statement
             {
-                $$ = stmt.NewForeach(nil, nil, nil, $1, false)
+                $$ = stmt.NewForeach(nil, nil, nil, $1)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
@@ -1412,7 +1407,7 @@ foreach_statement:
     |   ':' inner_statement_list T_ENDFOREACH ';'
             {
                 stmtList := stmt.NewStmtList($2)
-                $$ = stmt.NewAltForeach(nil, nil, nil, stmtList, false)
+                $$ = stmt.NewAltForeach(nil, nil, nil, stmtList)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition(stmtList, yylex.(*Parser).positionBuilder.NewNodeListPosition($2))
@@ -3273,7 +3268,7 @@ lexical_var:
             {
                 identifier := node.NewIdentifier(strings.TrimLeft($1.Value, "$"))
                 variable := expr.NewVariable(identifier)
-                $$ = expr.NewClosureUse(variable, false)
+                $$ = expr.NewClosureUse(variable)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition(identifier, yylex.(*Parser).positionBuilder.NewTokenPosition($1))
@@ -3287,7 +3282,8 @@ lexical_var:
             {
                 identifier := node.NewIdentifier(strings.TrimLeft($2.Value, "$"))
                 variable := expr.NewVariable(identifier)
-                $$ = expr.NewClosureUse(variable, true)
+                reference := expr.NewReference(variable)
+                $$ = expr.NewClosureUse(reference)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition(identifier, yylex.(*Parser).positionBuilder.NewTokenPosition($2))
@@ -3296,7 +3292,7 @@ lexical_var:
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $1, comment.AmpersandToken)
-                yylex.(*Parser).comments.AddFromToken(variable, $2, comment.VariableToken)
+                yylex.(*Parser).comments.AddFromToken(reference, $2, comment.VariableToken)
             }
 ;
 
@@ -3915,7 +3911,7 @@ non_empty_array_pair_list:
 array_pair:
         expr T_DOUBLE_ARROW expr
             {
-                $$ = expr.NewArrayItem($1, $3, false)
+                $$ = expr.NewArrayItem($1, $3)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodesPosition($1, $3))
@@ -3925,37 +3921,39 @@ array_pair:
             }
     |   expr
             {
-                $$ = expr.NewArrayItem(nil, $1, false)
+                $$ = expr.NewArrayItem(nil, $1)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodePosition($1))
             }
     |   expr T_DOUBLE_ARROW '&' variable
             {
-                $$ = expr.NewArrayItem($1, $4, true)
+                reference := expr.NewReference($4)
+                $$ = expr.NewArrayItem($1, reference)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewNodesPosition($1, $4))
 
                 // save comments
                 yylex.(*Parser).comments.AddFromToken($$, $2, comment.DoubleArrowToken)
-                yylex.(*Parser).comments.AddFromToken($$, $3, comment.AmpersandToken)
+                yylex.(*Parser).comments.AddFromToken(reference, $3, comment.AmpersandToken)
             }
     |   '&' variable
             {
-                $$ = expr.NewArrayItem(nil, $2, true)
+                reference := expr.NewReference($2)
+                $$ = expr.NewArrayItem(nil, reference)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition($$, yylex.(*Parser).positionBuilder.NewTokenNodePosition($1, $2))
 
                 // save comments
-                yylex.(*Parser).comments.AddFromToken($$, $1, comment.AmpersandToken)
+                yylex.(*Parser).comments.AddFromToken(reference, $1, comment.AmpersandToken)
             }
     |   expr T_DOUBLE_ARROW T_LIST '(' array_pair_list ')'
             {
                 // TODO: Cannot use list() as standalone expression
                 list := expr.NewList($5)
-                $$ = expr.NewArrayItem($1, list, false)
+                $$ = expr.NewArrayItem($1, list)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition(list, yylex.(*Parser).positionBuilder.NewTokensPosition($3, $6))
@@ -3971,7 +3969,7 @@ array_pair:
             {
                 // TODO: Cannot use list() as standalone expression
                 list := expr.NewList($3)
-                $$ = expr.NewArrayItem(nil, list, false)
+                $$ = expr.NewArrayItem(nil, list)
 
                 // save position
                 yylex.(*Parser).positions.AddPosition(list, yylex.(*Parser).positionBuilder.NewTokensPosition($1, $4))
@@ -4279,8 +4277,3 @@ isset_variable:
 /////////////////////////////////////////////////////////////////////////
 
 %%
-
-type foreachVariable struct {
-	node  node.Node
-	byRef bool
-}

php7/php7_test.go

@@ -1155,20 +1155,19 @@ func TestPhp7(t *testing.T) {
 				Stmt:     &stmt.StmtList{Stmts: []node.Node{}},
 			},
 			&stmt.Foreach{
-				ByRef:    true,
 				Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 				Key:  &expr.Variable{VarName: &node.Identifier{Value: "k"}},
+				Variable: &expr.Reference{
 					Variable: &expr.Variable{VarName: &node.Identifier{Value: "v"}},
+				},
 				Stmt: &stmt.StmtList{Stmts: []node.Node{}},
 			},
 			&stmt.Foreach{
-				ByRef: false,
 				Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 				Key:  &expr.Variable{VarName: &node.Identifier{Value: "k"}},
 				Variable: &expr.List{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &expr.Variable{VarName: &node.Identifier{Value: "v"}},
 						},
 					},
@@ -1176,13 +1175,11 @@ func TestPhp7(t *testing.T) {
 				Stmt: &stmt.StmtList{Stmts: []node.Node{}},
 			},
 			&stmt.Foreach{
-				ByRef: false,
 				Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 				Key:  &expr.Variable{VarName: &node.Identifier{Value: "k"}},
 				Variable: &expr.ShortList{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &expr.Variable{VarName: &node.Identifier{Value: "v"}},
 						},
 					},
@@ -2062,7 +2059,6 @@ func TestPhp7(t *testing.T) {
 				Expr: &expr.Array{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 					},
@@ -2072,13 +2068,11 @@ func TestPhp7(t *testing.T) {
 				Expr: &expr.Array{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Key: &scalar.Lnumber{Value: "1"},
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 						&expr.ArrayItem{
-							ByRef: true,
+							Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "b"}}},
-							Val:   &expr.Variable{VarName: &node.Identifier{Value: "b"}},
 						},
 					},
 				},
@@ -2147,12 +2141,10 @@ func TestPhp7(t *testing.T) {
 					},
 					Uses: []node.Node{
 						&expr.ClosureUse{
-							ByRef:    false,
 							Variable: &expr.Variable{VarName: &node.Identifier{Value: "c"}},
 						},
 						&expr.ClosureUse{
-							ByRef:    true,
+							Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "d"}}},
-							Variable: &expr.Variable{VarName: &node.Identifier{Value: "d"}},
 						},
 					},
 					Stmts: []node.Node{},
@@ -2339,7 +2331,6 @@ func TestPhp7(t *testing.T) {
 					Variable: &expr.List{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 							},
 						},
@@ -2352,7 +2343,6 @@ func TestPhp7(t *testing.T) {
 					Variable: &expr.List{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.ArrayDimFetch{
 									Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 								},
@@ -2367,11 +2357,9 @@ func TestPhp7(t *testing.T) {
 					Variable: &expr.List{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.List{
 									Items: []node.Node{
 										&expr.ArrayItem{
-											ByRef: false,
 											Val: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 										},
 									},
@@ -2478,7 +2466,6 @@ func TestPhp7(t *testing.T) {
 				Expr: &expr.ShortArray{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 					},
@@ -2488,13 +2475,11 @@ func TestPhp7(t *testing.T) {
 				Expr: &expr.ShortArray{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: false,
 							Key: &scalar.Lnumber{Value: "1"},
 							Val: &scalar.Lnumber{Value: "1"},
 						},
 						&expr.ArrayItem{
-							ByRef: true,
+							Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "b"}}},
-							Val:   &expr.Variable{VarName: &node.Identifier{Value: "b"}},
 						},
 					},
 				},
@@ -2504,7 +2489,6 @@ func TestPhp7(t *testing.T) {
 					Variable: &expr.ShortList{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 							},
 						},
@@ -2517,7 +2501,6 @@ func TestPhp7(t *testing.T) {
 					Variable: &expr.ShortList{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.ArrayDimFetch{
 									Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 								},
@@ -2532,11 +2515,9 @@ func TestPhp7(t *testing.T) {
 					Variable: &expr.ShortList{
 						Items: []node.Node{
 							&expr.ArrayItem{
-								ByRef: false,
 								Val: &expr.List{
 									Items: []node.Node{
 										&expr.ArrayItem{
-											ByRef: false,
 											Val: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 										},
 									},
@@ -3133,7 +3114,6 @@ func TestPhp7(t *testing.T) {
 						Variable: &expr.ShortArray{
 							Items: []node.Node{
 								&expr.ArrayItem{
-									ByRef: false,
 									Val: &expr.Variable{VarName: &node.Identifier{Value: "foo"}},
 								},
 							},
@@ -3169,7 +3149,6 @@ func TestPhp7(t *testing.T) {
 						Variable: &expr.ShortArray{
 							Items: []node.Node{
 								&expr.ArrayItem{
-									ByRef: false,
 									Val: &scalar.Lnumber{Value: "1"},
 								},
 							},
@@ -3227,17 +3206,14 @@ func TestPhp7(t *testing.T) {
 				Expr: &expr.ShortArray{
 					Items: []node.Node{
 						&expr.ArrayItem{
-							ByRef: true,
 							Key: &scalar.Lnumber{Value: "1"},
-							Val:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+							Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}}},
 						},
 						&expr.ArrayItem{
-							ByRef: false,
 							Key: &scalar.Lnumber{Value: "2"},
 							Val: &expr.List{
 								Items: []node.Node{
 									&expr.ArrayItem{
-										ByRef: false,
 										Val: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
 									},
 								},

printer/printer.go

@@ -272,6 +272,8 @@ func (p *Printer) printNode(n node.Node) {
 		p.printExprPrint(n)
 	case *expr.PropertyFetch:
 		p.printExprPropertyFetch(n)
+	case *expr.Reference:
+		p.printExprReference(n)
 	case *expr.Require:
 		p.printExprRequire(n)
 	case *expr.RequireOnce:
@@ -964,10 +966,6 @@ func (p *Printer) printExprArrayItem(n node.Node) {
 		io.WriteString(p.w, " => ")
 	}
 
-	if nn.ByRef {
-		io.WriteString(p.w, "&")
-	}
-
 	p.Print(nn.Val)
 }
 
@@ -1008,11 +1006,6 @@ func (p *Printer) printExprClone(n node.Node) {
 
 func (p *Printer) printExprClosureUse(n node.Node) {
 	nn := n.(*expr.ClosureUse)
-
-	if nn.ByRef {
-		io.WriteString(p.w, "&")
-	}
-
 	p.Print(nn.Variable)
 }
 
@@ -1211,6 +1204,13 @@ func (p *Printer) printExprPropertyFetch(n node.Node) {
 	p.Print(nn.Property)
 }
 
+func (p *Printer) printExprReference(n node.Node) {
+	nn := n.(*expr.Reference)
+
+	io.WriteString(p.w, "&")
+	p.Print(nn.Variable)
+}
+
 func (p *Printer) printExprRequire(n node.Node) {
 	nn := n.(*expr.Require)
 
@@ -1382,10 +1382,6 @@ func (p *Printer) printStmtAltForeach(n node.Node) {
 		io.WriteString(p.w, " => ")
 	}
 
-	if nn.ByRef {
-		io.WriteString(p.w, "&")
-	}
-
 	p.Print(nn.Variable)
 
 	io.WriteString(p.w, ") :\n")
@@ -1769,9 +1765,6 @@ func (p *Printer) printStmtForeach(n node.Node) {
 		io.WriteString(p.w, " => ")
 	}
 
-	if nn.ByRef {
-		io.WriteString(p.w, "&")
-	}
 	p.Print(nn.Variable)
 	io.WriteString(p.w, ")")
 

printer/printer_test.go

@@ -1245,7 +1245,6 @@ func TestPrintExprArrayItemWithKey(t *testing.T) {
 
 	p := printer.NewPrinter(o, "    ")
 	p.Print(&expr.ArrayItem{
-		ByRef: false,
 		Key: &scalar.String{Value: "'Hello'"},
 		Val: &expr.Variable{VarName: &node.Identifier{Value: "world"}},
 	})
@@ -1263,8 +1262,7 @@ func TestPrintExprArrayItem(t *testing.T) {
 
 	p := printer.NewPrinter(o, "    ")
 	p.Print(&expr.ArrayItem{
-		ByRef: true,
+		Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "world"}}},
-		Val:   &expr.Variable{VarName: &node.Identifier{Value: "world"}},
 	})
 
 	expected := `&$world`
@@ -1282,17 +1280,14 @@ func TestPrintExprArray(t *testing.T) {
 	p.Print(&expr.Array{
 		Items: []node.Node{
 			&expr.ArrayItem{
-				ByRef: false,
 				Key: &scalar.String{Value: "'Hello'"},
 				Val: &expr.Variable{VarName: &node.Identifier{Value: "world"}},
 			},
 			&expr.ArrayItem{
-				ByRef: true,
 				Key: &scalar.Lnumber{Value: "2"},
-				Val:   &expr.Variable{VarName: &node.Identifier{Value: "var"}},
+				Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "var"}}},
 			},
 			&expr.ArrayItem{
-				ByRef: false,
 				Val: &expr.Variable{VarName: &node.Identifier{Value: "var"}},
 			},
 		},
@@ -1376,8 +1371,7 @@ func TestPrintExprClosureUse(t *testing.T) {
 
 	p := printer.NewPrinter(o, "    ")
 	p.Print(&expr.ClosureUse{
-		ByRef:    true,
+		Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "var"}}},
-		Variable: &expr.Variable{VarName: &node.Identifier{Value: "var"}},
 	})
 
 	expected := `&$var`
@@ -1406,11 +1400,9 @@ func TestPrintExprClosure(t *testing.T) {
 				},
 				Uses: []node.Node{
 					&expr.ClosureUse{
-						ByRef:    true,
+						Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}}},
-						Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 					},
 					&expr.ClosureUse{
-						ByRef:    false,
 						Variable: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
 					},
 				},
@@ -1795,6 +1787,22 @@ func TestPrintPropertyFetch(t *testing.T) {
 	}
 }
 
+func TestPrintExprReference(t *testing.T) {
+	o := bytes.NewBufferString("")
+
+	p := printer.NewPrinter(o, "    ")
+	p.Print(&expr.Reference{
+		Variable: &expr.Variable{VarName: &node.Identifier{Value: "foo"}},
+	})
+
+	expected := `&$foo`
+	actual := o.String()
+
+	if expected != actual {
+		t.Errorf("\nexpected: %s\ngot: %s\n", expected, actual)
+	}
+}
+
 func TestPrintRequire(t *testing.T) {
 	o := bytes.NewBufferString("")
 
@@ -1854,9 +1862,8 @@ func TestPrintExprShortArray(t *testing.T) {
 				Val: &expr.Variable{VarName: &node.Identifier{Value: "world"}},
 			},
 			&expr.ArrayItem{
-				ByRef: true,
 				Key: &scalar.Lnumber{Value: "2"},
-				Val:   &expr.Variable{VarName: &node.Identifier{Value: "var"}},
+				Val: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "var"}}},
 			},
 			&expr.ArrayItem{
 				Val: &expr.Variable{VarName: &node.Identifier{Value: "var"}},
@@ -2200,10 +2207,9 @@ func TestPrintAltForeach(t *testing.T) {
 	p.Print(&stmt.Namespace{
 		Stmts: []node.Node{
 			&stmt.AltForeach{
-				ByRef:    true,
 				Expr:     &expr.Variable{VarName: &node.Identifier{Value: "var"}},
 				Key:      &expr.Variable{VarName: &node.Identifier{Value: "key"}},
-				Variable: &expr.Variable{VarName: &node.Identifier{Value: "val"}},
+				Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "val"}}},
 				Stmt: &stmt.StmtList{
 					Stmts: []node.Node{
 						&stmt.Expression{Expr: &expr.Variable{VarName: &node.Identifier{Value: "d"}}},
@@ -3141,10 +3147,9 @@ func TestPrintStmtForeachNop(t *testing.T) {
 
 	p := printer.NewPrinter(o, "    ")
 	p.Print(&stmt.Foreach{
-		ByRef:    true,
 		Expr:     &expr.Variable{VarName: &node.Identifier{Value: "a"}},
 		Key:      &expr.Variable{VarName: &node.Identifier{Value: "k"}},
-		Variable: &expr.Variable{VarName: &node.Identifier{Value: "v"}},
+		Variable: &expr.Reference{Variable: &expr.Variable{VarName: &node.Identifier{Value: "v"}}},
 		Stmt:     &stmt.Nop{},
 	})