[refactoring] update ast structure of "Static", "Global" and "StaticVar" nodes

pkg/ast/node.go

@@ -476,7 +476,10 @@ func (n *StmtFunction) Accept(v NodeVisitor) {
 // StmtGlobal node
 type StmtGlobal struct {
 	Node
-	Vars []Vertex
+	GlobalTkn     *token.Token
+	Vars          []Vertex
+	SeparatorTkns []*token.Token
+	SemiColonTkn  *token.Token
 }
 
 func (n *StmtGlobal) Accept(v NodeVisitor) {
@@ -630,7 +633,10 @@ func (n *StmtReturn) Accept(v NodeVisitor) {
 // StmtStatic node
 type StmtStatic struct {
 	Node
-	Vars []Vertex
+	StaticTkn     *token.Token
+	Vars          []Vertex
+	SeparatorTkns []*token.Token
+	SemiColonTkn  *token.Token
 }
 
 func (n *StmtStatic) Accept(v NodeVisitor) {
@@ -640,8 +646,9 @@ func (n *StmtStatic) Accept(v NodeVisitor) {
 // StmtStaticVar node
 type StmtStaticVar struct {
 	Node
-	Var  Vertex
-	Expr Vertex
+	Var      Vertex
+	EqualTkn *token.Token
+	Expr     Vertex
 }
 
 func (n *StmtStaticVar) Accept(v NodeVisitor) {

pkg/ast/visitor/filter_tokens.go

@@ -178,3 +178,19 @@ func (v *FilterTokens) StmtReturn(n *ast.StmtReturn) {
 	n.ReturnTkn = nil
 	n.SemiColonTkn = nil
 }
+
+func (v *FilterTokens) StmtGlobal(n *ast.StmtGlobal) {
+	n.GlobalTkn = nil
+	n.SeparatorTkns = nil
+	n.SemiColonTkn = nil
+}
+
+func (v *FilterTokens) StmtStatic(n *ast.StmtStatic) {
+	n.StaticTkn = nil
+	n.SeparatorTkns = nil
+	n.SemiColonTkn = nil
+}
+
+func (v *FilterTokens) StmtStaticVar(n *ast.StmtStaticVar) {
+	n.EqualTkn = nil
+}