[refactoring] update ast structure of "ArrayDimFetch" and "ArrayItem" nodes

pkg/ast/node.go

@@ -953,8 +953,12 @@ func (n *ExprArray) Accept(v NodeVisitor) {
 // ExprArrayDimFetch node
 type ExprArrayDimFetch struct {
 	Node
-	Var Vertex
-	Dim Vertex
+	Var                  Vertex
+	OpenCurlyBracketTkn  *token.Token
+	OpenBracketTkn       *token.Token
+	Dim                  Vertex
+	CloseBracketTkn      *token.Token
+	CloseCurlyBracketTkn *token.Token
 }
 
 func (n *ExprArrayDimFetch) Accept(v NodeVisitor) {
@@ -964,9 +968,10 @@ func (n *ExprArrayDimFetch) Accept(v NodeVisitor) {
 // ExprArrayItem node
 type ExprArrayItem struct {
 	Node
-	Unpack bool
-	Key    Vertex
-	Val    Vertex
+	EllipsisTkn    *token.Token
+	Key            Vertex
+	DoubleArrowTkn *token.Token
+	Val            Vertex
 }
 
 func (n *ExprArrayItem) Accept(v NodeVisitor) {

pkg/ast/visitor/dump.go

@@ -620,11 +620,6 @@ func (v *Dump) ExprArrayItem(n *ast.ExprArrayItem) {
 	v.printIndentIfNotSingle(v.indent - 1)
 	v.print("&ast.ExprArrayItem{\n")
 	v.printNode(n.GetNode())
-
-	if n.Unpack {
-		v.printIndent(v.indent)
-		v.print("Unpack: true,\n")
-	}
 }
 
 func (v *Dump) ExprArrowFunction(n *ast.ExprArrowFunction) {