#31 dump to native golang struct

main.go

@@ -99,7 +99,7 @@ func printer(result <-chan parser.Parser) {
 			nsResolver := visitor.NewNamespaceResolver()
 			parserWorker.GetRootNode().Walk(nsResolver)
 
-			dumper := visitor.Dumper{
+			dumper := &visitor.Dumper{
 				Writer:     os.Stdout,
 				Indent:     "  | ",
 				Comments:   parserWorker.GetComments(),

node/expr/assign/n_assign.go

@@ -32,13 +32,15 @@ func (n *Assign) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_assign_ref.go

@@ -32,13 +32,15 @@ func (n *Reference) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_bitwise_and.go

@@ -32,13 +32,15 @@ func (n *BitwiseAnd) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_bitwise_or.go

@@ -32,13 +32,15 @@ func (n *BitwiseOr) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_bitwise_xor.go

@@ -32,13 +32,15 @@ func (n *BitwiseXor) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_concat.go

@@ -32,13 +32,15 @@ func (n *Concat) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_div.go

@@ -32,13 +32,15 @@ func (n *Div) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_minus.go

@@ -32,13 +32,15 @@ func (n *Minus) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_mod.go

@@ -32,13 +32,15 @@ func (n *Mod) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_mul.go

@@ -32,13 +32,15 @@ func (n *Mul) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_plus.go

@@ -32,13 +32,15 @@ func (n *Plus) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_pow.go

@@ -32,13 +32,15 @@ func (n *Pow) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_shift_left.go

@@ -32,13 +32,15 @@ func (n *ShiftLeft) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/n_shift_right.go

@@ -32,13 +32,15 @@ func (n *ShiftRight) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Expression != nil {
-		vv := v.GetChildrenVisitor("Expression")
-		n.Expression.Walk(vv)
+		v.EnterChildNode("Expression", n)
+		n.Expression.Walk(v)
+		v.LeaveChildNode("Expression", n)
 	}
 
 	v.LeaveNode(n)

node/expr/assign/t_visitor_test.go

@@ -20,112 +20,112 @@ var nodesToTest = []struct {
 }{
 	{
 		&assign.Reference{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.Assign{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.BitwiseAnd{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.BitwiseOr{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.BitwiseXor{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.Concat{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.Div{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.Minus{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.Mod{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.Mul{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.Plus{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.Pow{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.ShiftLeft{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
 	},
 	{
 		&assign.ShiftRight{
-			Variable:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Expression: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Variable:   &expr.Variable{},
+			Expression: &expr.Variable{},
 		},
 		[]string{"Variable", "Expression"},
 		map[string]interface{}{},
@@ -138,11 +138,15 @@ type visitorMock struct {
 }
 
 func (v *visitorMock) EnterNode(n walker.Walkable) bool { return v.visitChildren }
-func (v *visitorMock) GetChildrenVisitor(key string) walker.Visitor {
-	v.visitedKeys = append(v.visitedKeys, key)
-	return &visitorMock{v.visitChildren, nil}
-}
 func (v *visitorMock) LeaveNode(n walker.Walkable)      {}
+func (v *visitorMock) EnterChildNode(key string, w walker.Walkable) {
+	v.visitedKeys = append(v.visitedKeys, key)
+}
+func (v *visitorMock) LeaveChildNode(key string, w walker.Walkable) {}
+func (v *visitorMock) EnterChildList(key string, w walker.Walkable) {
+	v.visitedKeys = append(v.visitedKeys, key)
+}
+func (v *visitorMock) LeaveChildList(key string, w walker.Walkable) {}
 
 func TestVisitorDisableChildren(t *testing.T) {
 	for _, tt := range nodesToTest {

node/expr/binary/n_bitwise_and.go

@@ -32,13 +32,15 @@ func (n *BitwiseAnd) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_bitwise_or.go

@@ -32,13 +32,15 @@ func (n *BitwiseOr) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_bitwise_xor.go

@@ -32,13 +32,15 @@ func (n *BitwiseXor) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_boolean_and.go

@@ -32,13 +32,15 @@ func (n *BooleanAnd) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_boolean_or.go

@@ -32,13 +32,15 @@ func (n *BooleanOr) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_coalesce.go

@@ -32,13 +32,15 @@ func (n *Coalesce) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_concat.go

@@ -32,13 +32,15 @@ func (n *Concat) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_div.go

@@ -32,13 +32,15 @@ func (n *Div) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_equal.go

@@ -32,13 +32,15 @@ func (n *Equal) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_greater.go

@@ -32,13 +32,15 @@ func (n *Greater) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_greater_or_equal.go

@@ -32,13 +32,15 @@ func (n *GreaterOrEqual) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_identical.go

@@ -32,13 +32,15 @@ func (n *Identical) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_logical_and.go

@@ -32,13 +32,15 @@ func (n *LogicalAnd) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_logical_or.go

@@ -32,13 +32,15 @@ func (n *LogicalOr) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_logical_xor.go

@@ -32,13 +32,15 @@ func (n *LogicalXor) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_minus.go

@@ -32,13 +32,15 @@ func (n *Minus) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_mod.go

@@ -32,13 +32,15 @@ func (n *Mod) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_mul.go

@@ -32,13 +32,15 @@ func (n *Mul) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_not_equal.go

@@ -32,13 +32,15 @@ func (n *NotEqual) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_not_identical.go

@@ -32,13 +32,15 @@ func (n *NotIdentical) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_plus.go

@@ -32,13 +32,15 @@ func (n *Plus) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_pow.go

@@ -32,13 +32,15 @@ func (n *Pow) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_shift_left.go

@@ -32,13 +32,15 @@ func (n *ShiftLeft) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_shift_right.go

@@ -32,13 +32,15 @@ func (n *ShiftRight) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_smaller.go

@@ -32,13 +32,15 @@ func (n *Smaller) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_smaller_or_equal.go

@@ -32,13 +32,15 @@ func (n *SmallerOrEqual) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/n_spaceship.go

@@ -32,13 +32,15 @@ func (n *Spaceship) Walk(v walker.Visitor) {
 	}
 
 	if n.Left != nil {
-		vv := v.GetChildrenVisitor("Left")
-		n.Left.Walk(vv)
+		v.EnterChildNode("Left", n)
+		n.Left.Walk(v)
+		v.LeaveChildNode("Left", n)
 	}
 
 	if n.Right != nil {
-		vv := v.GetChildrenVisitor("Right")
-		n.Right.Walk(vv)
+		v.EnterChildNode("Right", n)
+		n.Right.Walk(v)
+		v.LeaveChildNode("Right", n)
 	}
 
 	v.LeaveNode(n)

node/expr/binary/t_visitor_test.go

@@ -19,216 +19,216 @@ var nodesToTest = []struct {
 }{
 	{
 		&binary.BitwiseAnd{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.BitwiseOr{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.BitwiseXor{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.BooleanAnd{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.BooleanOr{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Coalesce{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Concat{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Div{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Equal{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.GreaterOrEqual{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Greater{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Identical{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.LogicalAnd{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.LogicalOr{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.LogicalXor{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Minus{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Mod{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Mul{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.NotEqual{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.NotIdentical{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Plus{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Pow{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.ShiftLeft{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.ShiftRight{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.SmallerOrEqual{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Smaller{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
 	},
 	{
 		&binary.Spaceship{
-			Left:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Right: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Left:  &expr.Variable{},
+			Right: &expr.Variable{},
 		},
 		[]string{"Left", "Right"},
 		map[string]interface{}{},
@@ -241,11 +241,15 @@ type visitorMock struct {
 }
 
 func (v *visitorMock) EnterNode(n walker.Walkable) bool { return v.visitChildren }
-func (v *visitorMock) GetChildrenVisitor(key string) walker.Visitor {
-	v.visitedKeys = append(v.visitedKeys, key)
-	return &visitorMock{v.visitChildren, nil}
-}
 func (v *visitorMock) LeaveNode(n walker.Walkable)      {}
+func (v *visitorMock) EnterChildNode(key string, w walker.Walkable) {
+	v.visitedKeys = append(v.visitedKeys, key)
+}
+func (v *visitorMock) LeaveChildNode(key string, w walker.Walkable) {}
+func (v *visitorMock) EnterChildList(key string, w walker.Walkable) {
+	v.visitedKeys = append(v.visitedKeys, key)
+}
+func (v *visitorMock) LeaveChildList(key string, w walker.Walkable) {}
 
 func TestVisitorDisableChildren(t *testing.T) {
 	for _, tt := range nodesToTest {

node/expr/cast/n_cast_array.go

@@ -30,8 +30,9 @@ func (n *Array) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/cast/n_cast_bool.go

@@ -30,8 +30,9 @@ func (n *Bool) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/cast/n_cast_double.go

@@ -30,8 +30,9 @@ func (n *Double) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/cast/n_cast_int.go

@@ -30,8 +30,9 @@ func (n *Int) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/cast/n_cast_object.go

@@ -30,8 +30,9 @@ func (n *Object) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/cast/n_cast_string.go

@@ -30,8 +30,9 @@ func (n *String) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/cast/n_cast_unset.go

@@ -30,8 +30,9 @@ func (n *Unset) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/cast/t_visitor_test.go

@@ -19,49 +19,49 @@ var nodesToTest = []struct {
 }{
 	{
 		&cast.Array{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&cast.Bool{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&cast.Double{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&cast.Int{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&cast.Object{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&cast.String{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&cast.Unset{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
@@ -74,11 +74,15 @@ type visitorMock struct {
 }
 
 func (v *visitorMock) EnterNode(n walker.Walkable) bool { return v.visitChildren }
-func (v *visitorMock) GetChildrenVisitor(key string) walker.Visitor {
-	v.visitedKeys = append(v.visitedKeys, key)
-	return &visitorMock{v.visitChildren, nil}
-}
 func (v *visitorMock) LeaveNode(n walker.Walkable)      {}
+func (v *visitorMock) EnterChildNode(key string, w walker.Walkable) {
+	v.visitedKeys = append(v.visitedKeys, key)
+}
+func (v *visitorMock) LeaveChildNode(key string, w walker.Walkable) {}
+func (v *visitorMock) EnterChildList(key string, w walker.Walkable) {
+	v.visitedKeys = append(v.visitedKeys, key)
+}
+func (v *visitorMock) LeaveChildList(key string, w walker.Walkable) {}
 
 func TestVisitorDisableChildren(t *testing.T) {
 	for _, tt := range nodesToTest {

node/expr/n_array.go

@@ -30,12 +30,13 @@ func (n *Array) Walk(v walker.Visitor) {
 	}
 
 	if n.Items != nil {
-		vv := v.GetChildrenVisitor("Items")
+		v.EnterChildList("Items", n)
 		for _, nn := range n.Items {
 			if nn != nil {
-				nn.Walk(vv)
+				nn.Walk(v)
 			}
 		}
+		v.LeaveChildList("Items", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_array_dim_fetch.go

@@ -32,13 +32,15 @@ func (n *ArrayDimFetch) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Dim != nil {
-		vv := v.GetChildrenVisitor("Dim")
-		n.Dim.Walk(vv)
+		v.EnterChildNode("Dim", n)
+		n.Dim.Walk(v)
+		v.LeaveChildNode("Dim", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_array_item.go

@@ -32,13 +32,15 @@ func (n *ArrayItem) Walk(v walker.Visitor) {
 	}
 
 	if n.Key != nil {
-		vv := v.GetChildrenVisitor("Key")
-		n.Key.Walk(vv)
+		v.EnterChildNode("Key", n)
+		n.Key.Walk(v)
+		v.LeaveChildNode("Key", n)
 	}
 
 	if n.Val != nil {
-		vv := v.GetChildrenVisitor("Val")
-		n.Val.Walk(vv)
+		v.EnterChildNode("Val", n)
+		n.Val.Walk(v)
+		v.LeaveChildNode("Val", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_bitwise_not.go

@@ -30,8 +30,9 @@ func (n *BitwiseNot) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_boolean_not.go

@@ -30,8 +30,9 @@ func (n *BooleanNot) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_class_const_fetch.go

@@ -32,13 +32,15 @@ func (n *ClassConstFetch) Walk(v walker.Visitor) {
 	}
 
 	if n.Class != nil {
-		vv := v.GetChildrenVisitor("Class")
-		n.Class.Walk(vv)
+		v.EnterChildNode("Class", n)
+		n.Class.Walk(v)
+		v.LeaveChildNode("Class", n)
 	}
 
 	if n.ConstantName != nil {
-		vv := v.GetChildrenVisitor("ConstantName")
-		n.ConstantName.Walk(vv)
+		v.EnterChildNode("ConstantName", n)
+		n.ConstantName.Walk(v)
+		v.LeaveChildNode("ConstantName", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_clone.go

@@ -30,8 +30,9 @@ func (n *Clone) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_closure.go

@@ -46,31 +46,35 @@ func (n *Closure) Walk(v walker.Visitor) {
 	}
 
 	if n.Params != nil {
-		vv := v.GetChildrenVisitor("Params")
+		v.EnterChildList("Params", n)
 		for _, nn := range n.Params {
 			if nn != nil {
-				nn.Walk(vv)
+				nn.Walk(v)
 			}
 		}
+		v.LeaveChildList("Params", n)
 	}
 
 	if n.ClosureUse != nil {
-		vv := v.GetChildrenVisitor("ClosureUse")
-		n.ClosureUse.Walk(vv)
+		v.EnterChildNode("ClosureUse", n)
+		n.ClosureUse.Walk(v)
+		v.LeaveChildNode("ClosureUse", n)
 	}
 
 	if n.ReturnType != nil {
-		vv := v.GetChildrenVisitor("ReturnType")
-		n.ReturnType.Walk(vv)
+		v.EnterChildNode("ReturnType", n)
+		n.ReturnType.Walk(v)
+		v.LeaveChildNode("ReturnType", n)
 	}
 
 	if n.Stmts != nil {
-		vv := v.GetChildrenVisitor("Stmts")
+		v.EnterChildList("Stmts", n)
 		for _, nn := range n.Stmts {
 			if nn != nil {
-				nn.Walk(vv)
+				nn.Walk(v)
 			}
 		}
+		v.LeaveChildList("Stmts", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_closure_use.go

@@ -30,12 +30,13 @@ func (n *ClosureUse) Walk(v walker.Visitor) {
 	}
 
 	if n.Uses != nil {
-		vv := v.GetChildrenVisitor("Uses")
+		v.EnterChildList("Uses", n)
 		for _, nn := range n.Uses {
 			if nn != nil {
-				nn.Walk(vv)
+				nn.Walk(v)
 			}
 		}
+		v.LeaveChildList("Uses", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_const_fetch.go

@@ -30,8 +30,9 @@ func (n *ConstFetch) Walk(v walker.Visitor) {
 	}
 
 	if n.Constant != nil {
-		vv := v.GetChildrenVisitor("Constant")
-		n.Constant.Walk(vv)
+		v.EnterChildNode("Constant", n)
+		n.Constant.Walk(v)
+		v.LeaveChildNode("Constant", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_die.go

@@ -30,8 +30,9 @@ func (n *Die) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_empty.go

@@ -30,8 +30,9 @@ func (n *Empty) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_error_suppress.go

@@ -30,8 +30,9 @@ func (n *ErrorSuppress) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_eval.go

@@ -30,8 +30,9 @@ func (n *Eval) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_exit.go

@@ -30,8 +30,9 @@ func (n *Exit) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_function_call.go

@@ -32,13 +32,15 @@ func (n *FunctionCall) Walk(v walker.Visitor) {
 	}
 
 	if n.Function != nil {
-		vv := v.GetChildrenVisitor("Function")
-		n.Function.Walk(vv)
+		v.EnterChildNode("Function", n)
+		n.Function.Walk(v)
+		v.LeaveChildNode("Function", n)
 	}
 
 	if n.ArgumentList != nil {
-		vv := v.GetChildrenVisitor("ArgumentList")
-		n.ArgumentList.Walk(vv)
+		v.EnterChildNode("ArgumentList", n)
+		n.ArgumentList.Walk(v)
+		v.LeaveChildNode("ArgumentList", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_include.go

@@ -30,8 +30,9 @@ func (n *Include) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_include_once.go

@@ -30,8 +30,9 @@ func (n *IncludeOnce) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_instance_of.go

@@ -32,13 +32,15 @@ func (n *InstanceOf) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	if n.Class != nil {
-		vv := v.GetChildrenVisitor("Class")
-		n.Class.Walk(vv)
+		v.EnterChildNode("Class", n)
+		n.Class.Walk(v)
+		v.LeaveChildNode("Class", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_isset.go

@@ -30,12 +30,13 @@ func (n *Isset) Walk(v walker.Visitor) {
 	}
 
 	if n.Variables != nil {
-		vv := v.GetChildrenVisitor("Variables")
+		v.EnterChildList("Variables", n)
 		for _, nn := range n.Variables {
 			if nn != nil {
-				nn.Walk(vv)
+				nn.Walk(v)
 			}
 		}
+		v.LeaveChildList("Variables", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_list.go

@@ -30,12 +30,13 @@ func (n *List) Walk(v walker.Visitor) {
 	}
 
 	if n.Items != nil {
-		vv := v.GetChildrenVisitor("Items")
+		v.EnterChildList("Items", n)
 		for _, nn := range n.Items {
 			if nn != nil {
-				nn.Walk(vv)
+				nn.Walk(v)
 			}
 		}
+		v.LeaveChildList("Items", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_method_call.go

@@ -34,18 +34,21 @@ func (n *MethodCall) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Method != nil {
-		vv := v.GetChildrenVisitor("Method")
-		n.Method.Walk(vv)
+		v.EnterChildNode("Method", n)
+		n.Method.Walk(v)
+		v.LeaveChildNode("Method", n)
 	}
 
 	if n.ArgumentList != nil {
-		vv := v.GetChildrenVisitor("ArgumentList")
-		n.ArgumentList.Walk(vv)
+		v.EnterChildNode("ArgumentList", n)
+		n.ArgumentList.Walk(v)
+		v.LeaveChildNode("ArgumentList", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_new.go

@@ -32,13 +32,15 @@ func (n *New) Walk(v walker.Visitor) {
 	}
 
 	if n.Class != nil {
-		vv := v.GetChildrenVisitor("Class")
-		n.Class.Walk(vv)
+		v.EnterChildNode("Class", n)
+		n.Class.Walk(v)
+		v.LeaveChildNode("Class", n)
 	}
 
 	if n.ArgumentList != nil {
-		vv := v.GetChildrenVisitor("ArgumentList")
-		n.ArgumentList.Walk(vv)
+		v.EnterChildNode("ArgumentList", n)
+		n.ArgumentList.Walk(v)
+		v.LeaveChildNode("ArgumentList", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_post_dec.go

@@ -30,8 +30,9 @@ func (n *PostDec) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_post_inc.go

@@ -30,8 +30,9 @@ func (n *PostInc) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_pre_dec.go

@@ -30,8 +30,9 @@ func (n *PreDec) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_pre_inc.go

@@ -30,8 +30,9 @@ func (n *PreInc) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_print.go

@@ -30,8 +30,9 @@ func (n *Print) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_property_fetch.go

@@ -32,13 +32,15 @@ func (n *PropertyFetch) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.Property != nil {
-		vv := v.GetChildrenVisitor("Property")
-		n.Property.Walk(vv)
+		v.EnterChildNode("Property", n)
+		n.Property.Walk(v)
+		v.LeaveChildNode("Property", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_reference.go

@@ -30,8 +30,9 @@ func (n *Reference) Walk(v walker.Visitor) {
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_require.go

@@ -30,8 +30,9 @@ func (n *Require) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_require_once.go

@@ -30,8 +30,9 @@ func (n *RequireOnce) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_shell_exec.go

@@ -30,12 +30,13 @@ func (n *ShellExec) Walk(v walker.Visitor) {
 	}
 
 	if n.Parts != nil {
-		vv := v.GetChildrenVisitor("Parts")
+		v.EnterChildList("Parts", n)
 		for _, nn := range n.Parts {
 			if nn != nil {
-				nn.Walk(vv)
+				nn.Walk(v)
 			}
 		}
+		v.LeaveChildList("Parts", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_short_array.go

@@ -30,12 +30,13 @@ func (n *ShortArray) Walk(v walker.Visitor) {
 	}
 
 	if n.Items != nil {
-		vv := v.GetChildrenVisitor("Items")
+		v.EnterChildList("Items", n)
 		for _, nn := range n.Items {
 			if nn != nil {
-				nn.Walk(vv)
+				nn.Walk(v)
 			}
 		}
+		v.LeaveChildList("Items", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_short_list.go

@@ -30,12 +30,13 @@ func (n *ShortList) Walk(v walker.Visitor) {
 	}
 
 	if n.Items != nil {
-		vv := v.GetChildrenVisitor("Items")
+		v.EnterChildList("Items", n)
 		for _, nn := range n.Items {
 			if nn != nil {
-				nn.Walk(vv)
+				nn.Walk(v)
 			}
 		}
+		v.LeaveChildList("Items", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_static_call.go

@@ -34,18 +34,21 @@ func (n *StaticCall) Walk(v walker.Visitor) {
 	}
 
 	if n.Class != nil {
-		vv := v.GetChildrenVisitor("Class")
-		n.Class.Walk(vv)
+		v.EnterChildNode("Class", n)
+		n.Class.Walk(v)
+		v.LeaveChildNode("Class", n)
 	}
 
 	if n.Call != nil {
-		vv := v.GetChildrenVisitor("Call")
-		n.Call.Walk(vv)
+		v.EnterChildNode("Call", n)
+		n.Call.Walk(v)
+		v.LeaveChildNode("Call", n)
 	}
 
 	if n.ArgumentList != nil {
-		vv := v.GetChildrenVisitor("ArgumentList")
-		n.ArgumentList.Walk(vv)
+		v.EnterChildNode("ArgumentList", n)
+		n.ArgumentList.Walk(v)
+		v.LeaveChildNode("ArgumentList", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_static_property_fetch.go

@@ -32,13 +32,15 @@ func (n *StaticPropertyFetch) Walk(v walker.Visitor) {
 	}
 
 	if n.Class != nil {
-		vv := v.GetChildrenVisitor("Class")
-		n.Class.Walk(vv)
+		v.EnterChildNode("Class", n)
+		n.Class.Walk(v)
+		v.LeaveChildNode("Class", n)
 	}
 
 	if n.Property != nil {
-		vv := v.GetChildrenVisitor("Property")
-		n.Property.Walk(vv)
+		v.EnterChildNode("Property", n)
+		n.Property.Walk(v)
+		v.LeaveChildNode("Property", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_ternary.go

@@ -34,18 +34,21 @@ func (n *Ternary) Walk(v walker.Visitor) {
 	}
 
 	if n.Condition != nil {
-		vv := v.GetChildrenVisitor("Condition")
-		n.Condition.Walk(vv)
+		v.EnterChildNode("Condition", n)
+		n.Condition.Walk(v)
+		v.LeaveChildNode("Condition", n)
 	}
 
 	if n.IfTrue != nil {
-		vv := v.GetChildrenVisitor("IfTrue")
-		n.IfTrue.Walk(vv)
+		v.EnterChildNode("IfTrue", n)
+		n.IfTrue.Walk(v)
+		v.LeaveChildNode("IfTrue", n)
 	}
 
 	if n.IfFalse != nil {
-		vv := v.GetChildrenVisitor("IfFalse")
-		n.IfFalse.Walk(vv)
+		v.EnterChildNode("IfFalse", n)
+		n.IfFalse.Walk(v)
+		v.LeaveChildNode("IfFalse", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_unary_minus.go

@@ -30,8 +30,9 @@ func (n *UnaryMinus) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_unary_plus.go

@@ -30,8 +30,9 @@ func (n *UnaryPlus) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_variable.go

@@ -35,8 +35,9 @@ func (n *Variable) Walk(v walker.Visitor) {
 	}
 
 	if n.VarName != nil {
-		vv := v.GetChildrenVisitor("VarName")
-		n.VarName.Walk(vv)
+		v.EnterChildNode("VarName", n)
+		n.VarName.Walk(v)
+		v.LeaveChildNode("VarName", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_yield.go

@@ -32,13 +32,15 @@ func (n *Yield) Walk(v walker.Visitor) {
 	}
 
 	if n.Key != nil {
-		vv := v.GetChildrenVisitor("Key")
-		n.Key.Walk(vv)
+		v.EnterChildNode("Key", n)
+		n.Key.Walk(v)
+		v.LeaveChildNode("Key", n)
 	}
 
 	if n.Value != nil {
-		vv := v.GetChildrenVisitor("Value")
-		n.Value.Walk(vv)
+		v.EnterChildNode("Value", n)
+		n.Value.Walk(v)
+		v.LeaveChildNode("Value", n)
 	}
 
 	v.LeaveNode(n)

node/expr/n_yield_from.go

@@ -30,8 +30,9 @@ func (n *YieldFrom) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/expr/t_visitor_test.go

@@ -24,7 +24,7 @@ var nodesToTest = []struct {
 }{
 	{
 		&expr.ArrayDimFetch{
-			Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Variable: &expr.Variable{},
 			Dim:      &scalar.Lnumber{Value: "1"},
 		},
 		[]string{"Variable", "Dim"},
@@ -41,10 +41,7 @@ var nodesToTest = []struct {
 	{
 		&expr.Array{
 			Items: []node.Node{
-				&expr.ArrayItem{
-					Key: &scalar.String{Value: "key"},
-					Val: &scalar.Lnumber{Value: "1"},
-				},
+				&expr.ArrayItem{},
 			},
 		},
 		[]string{"Items"},
@@ -52,21 +49,21 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.BitwiseNot{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.BooleanNot{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.ClassConstFetch{
-			Class:        &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Class:        &expr.Variable{},
 			ConstantName: &node.Identifier{Value: "foo"},
 		},
 		[]string{"Class", "ConstantName"},
@@ -74,7 +71,7 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.Clone{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
@@ -82,7 +79,7 @@ var nodesToTest = []struct {
 	{
 		&expr.ClosureUse{
 			Uses: []node.Node{
-				&expr.Variable{VarName: &node.Identifier{Value: "a"}},
+				&expr.Variable{},
 			},
 		},
 		[]string{"Uses"},
@@ -110,42 +107,42 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.Empty{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.ErrorSuppress{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.Eval{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.Exit{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.Die{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.FunctionCall{
-			Function:     &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Function:     &expr.Variable{},
 			ArgumentList: &node.ArgumentList{},
 		},
 		[]string{"Function", "ArgumentList"},
@@ -153,21 +150,21 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.IncludeOnce{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.Include{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.InstanceOf{
-			Expr:  &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr:  &expr.Variable{},
 			Class: &name.Name{},
 		},
 		[]string{"Expr", "Class"},
@@ -176,7 +173,7 @@ var nodesToTest = []struct {
 	{
 		&expr.Isset{
 			Variables: []node.Node{
-				&expr.Variable{VarName: &node.Identifier{Value: "a"}},
+				&expr.Variable{},
 			},
 		},
 		[]string{"Variables"},
@@ -193,7 +190,7 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.MethodCall{
-			Variable:     &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Variable:     &expr.Variable{},
 			Method:       &node.Identifier{Value: "foo"},
 			ArgumentList: &node.ArgumentList{},
 		},
@@ -210,42 +207,42 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.PostDec{
-			Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Variable: &expr.Variable{},
 		},
 		[]string{"Variable"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.PostInc{
-			Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Variable: &expr.Variable{},
 		},
 		[]string{"Variable"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.PreDec{
-			Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Variable: &expr.Variable{},
 		},
 		[]string{"Variable"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.PreInc{
-			Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Variable: &expr.Variable{},
 		},
 		[]string{"Variable"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.Print{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.PropertyFetch{
-			Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Variable: &expr.Variable{},
 			Property: &node.Identifier{Value: "foo"},
 		},
 		[]string{"Variable", "Property"},
@@ -253,21 +250,21 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.Reference{
-			Variable: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Variable: &expr.Variable{},
 		},
 		[]string{"Variable"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.RequireOnce{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.Require{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
@@ -318,23 +315,23 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.Ternary{
-			Condition: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			IfTrue:    &expr.Variable{VarName: &node.Identifier{Value: "b"}},
-			IfFalse:   &expr.Variable{VarName: &node.Identifier{Value: "c"}},
+			Condition: &expr.Variable{},
+			IfTrue:    &expr.Variable{},
+			IfFalse:   &expr.Variable{},
 		},
 		[]string{"Condition", "IfTrue", "IfFalse"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.UnaryMinus{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.UnaryPlus{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
@@ -346,15 +343,15 @@ var nodesToTest = []struct {
 	},
 	{
 		&expr.YieldFrom{
-			Expr: &expr.Variable{VarName: &node.Identifier{Value: "a"}},
+			Expr: &expr.Variable{},
 		},
 		[]string{"Expr"},
 		map[string]interface{}{},
 	},
 	{
 		&expr.Yield{
-			Key:   &expr.Variable{VarName: &node.Identifier{Value: "a"}},
-			Value: &expr.Variable{VarName: &node.Identifier{Value: "b"}},
+			Key:   &expr.Variable{},
+			Value: &expr.Variable{},
 		},
 		[]string{"Key", "Value"},
 		map[string]interface{}{},
@@ -367,11 +364,15 @@ type visitorMock struct {
 }
 
 func (v *visitorMock) EnterNode(n walker.Walkable) bool { return v.visitChildren }
-func (v *visitorMock) GetChildrenVisitor(key string) walker.Visitor {
-	v.visitedKeys = append(v.visitedKeys, key)
-	return &visitorMock{v.visitChildren, nil}
-}
 func (v *visitorMock) LeaveNode(n walker.Walkable)      {}
+func (v *visitorMock) EnterChildNode(key string, w walker.Walkable) {
+	v.visitedKeys = append(v.visitedKeys, key)
+}
+func (v *visitorMock) LeaveChildNode(key string, w walker.Walkable) {}
+func (v *visitorMock) EnterChildList(key string, w walker.Walkable) {
+	v.visitedKeys = append(v.visitedKeys, key)
+}
+func (v *visitorMock) LeaveChildList(key string, w walker.Walkable) {}
 
 func TestVisitorDisableChildren(t *testing.T) {
 	for _, tt := range nodesToTest {

node/n_argument.go

@@ -34,8 +34,9 @@ func (n *Argument) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/n_argument_list.go

@@ -29,12 +29,13 @@ func (n *ArgumentList) Walk(v walker.Visitor) {
 	}
 
 	if n.Arguments != nil {
-		vv := v.GetChildrenVisitor("Arguments")
+		v.EnterChildList("Arguments", n)
 		for _, nn := range n.Arguments {
 			if nn != nil {
-				nn.Walk(vv)
+				nn.Walk(v)
 			}
 		}
+		v.LeaveChildList("Arguments", n)
 	}
 
 	v.LeaveNode(n)

node/n_nullable.go

@@ -27,8 +27,9 @@ func (n *Nullable) Walk(v walker.Visitor) {
 	}
 
 	if n.Expr != nil {
-		vv := v.GetChildrenVisitor("Expr")
-		n.Expr.Walk(vv)
+		v.EnterChildNode("Expr", n)
+		n.Expr.Walk(v)
+		v.LeaveChildNode("Expr", n)
 	}
 
 	v.LeaveNode(n)

node/n_parameter.go

@@ -38,18 +38,21 @@ func (n *Parameter) Walk(v walker.Visitor) {
 	}
 
 	if n.VariableType != nil {
-		vv := v.GetChildrenVisitor("VariableType")
-		n.VariableType.Walk(vv)
+		v.EnterChildNode("VariableType", n)
+		n.VariableType.Walk(v)
+		v.LeaveChildNode("VariableType", n)
 	}
 
 	if n.Variable != nil {
-		vv := v.GetChildrenVisitor("Variable")
-		n.Variable.Walk(vv)
+		v.EnterChildNode("Variable", n)
+		n.Variable.Walk(v)
+		v.LeaveChildNode("Variable", n)
 	}
 
 	if n.DefaultValue != nil {
-		vv := v.GetChildrenVisitor("DefaultValue")
-		n.DefaultValue.Walk(vv)
+		v.EnterChildNode("DefaultValue", n)
+		n.DefaultValue.Walk(v)
+		v.LeaveChildNode("DefaultValue", n)
 	}
 
 	v.LeaveNode(n)