[refactoring] update ast structure of "Encapsed", "EncapsedStringPart" and "Heredoc" nodes

pkg/ast/node.go

@@ -126,7 +126,9 @@ func (n *ScalarDnumber) Accept(v NodeVisitor) {
 // ScalarEncapsed node
 type ScalarEncapsed struct {
 	Node
-	Parts []Vertex
+	OpenQoteTkn  *token.Token
+	Parts        []Vertex
+	CloseQoteTkn *token.Token
 }
 
 func (n *ScalarEncapsed) Accept(v NodeVisitor) {
@@ -136,7 +138,8 @@ func (n *ScalarEncapsed) Accept(v NodeVisitor) {
 // ScalarEncapsedStringPart node
 type ScalarEncapsedStringPart struct {
 	Node
-	Value []byte
+	EncapsedStrTkn *token.Token
+	Value          []byte
 }
 
 func (n *ScalarEncapsedStringPart) Accept(v NodeVisitor) {
@@ -146,8 +149,9 @@ func (n *ScalarEncapsedStringPart) Accept(v NodeVisitor) {
 // ScalarHeredoc node
 type ScalarHeredoc struct {
 	Node
-	Label []byte
-	Parts []Vertex
+	OpenHeredocTkn  *token.Token
+	Parts           []Vertex
+	CloseHeredocTkn *token.Token
 }
 
 func (n *ScalarHeredoc) Accept(v NodeVisitor) {

pkg/ast/visitor/dump.go

@@ -1224,9 +1224,6 @@ func (v *Dump) ScalarHeredoc(n *ast.ScalarHeredoc) {
 	v.printIndentIfNotSingle(v.indent - 1)
 	v.print("&ast.ScalarHeredoc{\n")
 	v.printNode(n.GetNode())
-
-	v.printIndent(v.indent)
-	v.print(fmt.Sprintf("Label: %q,\n", n.Label))
 }
 
 func (v *Dump) ScalarLnumber(n *ast.ScalarLnumber) {

pkg/printer/pretty_printer.go

@@ -558,7 +558,7 @@ func (p *PrettyPrinter) printScalarEncapsed(n ast.Vertex) {
 func (p *PrettyPrinter) printScalarHeredoc(n ast.Vertex) {
 	nn := n.(*ast.ScalarHeredoc)
 
-	io.WriteString(p.w, string(nn.Label))
+	io.WriteString(p.w, string(nn.OpenHeredocTkn.Value))
 
 	for _, part := range nn.Parts {
 		switch part.(type) {
@@ -571,7 +571,7 @@ func (p *PrettyPrinter) printScalarHeredoc(n ast.Vertex) {
 		}
 	}
 
-	io.WriteString(p.w, strings.Trim(string(nn.Label), "<\"'\n"))
+	io.WriteString(p.w, strings.Trim(string(nn.OpenHeredocTkn.Value), "<\"'\n"))
 }
 
 func (p *PrettyPrinter) printScalarMagicConstant(n ast.Vertex) {

pkg/printer/printer.go

@@ -687,7 +687,7 @@ func (p *Printer) printScalarHeredoc(n ast.Vertex) {
 	p.printFreeFloatingOrDefault(nn, token.Start, p.bufStart)
 	p.bufStart = ""
 
-	p.write(nn.Label)
+	p.write(nn.OpenHeredocTkn.Value)
 
 	for _, part := range nn.Parts {
 		switch part.(type) {
@@ -710,7 +710,7 @@ func (p *Printer) printScalarHeredoc(n ast.Vertex) {
 		}
 	}
 
-	p.write([]byte(strings.Trim(string(nn.Label), "<\"'\n")))
+	p.write([]byte(strings.Trim(string(nn.OpenHeredocTkn.Value), "<\"'\n")))
 
 	p.printFreeFloating(nn, token.End)
 }