create token name constants in comment package

parser/comments.go

@@ -3,6 +3,7 @@ package parser
 import (
 	"github.com/z7zmey/php-parser/comment"
 	"github.com/z7zmey/php-parser/node"
+	"github.com/z7zmey/php-parser/scanner"
 )
 
 // Comments a collection of comment groups assigned to nodes
@@ -12,3 +13,18 @@ type Comments map[node.Node][]*comment.Comment
 func (c Comments) AddComments(node node.Node, comments []*comment.Comment) {
 	c[node] = append(c[node], comments...)
 }
+
+func (c Comments) AddFromToken(node node.Node, token *scanner.Token, tokenName comment.TokenName) {
+	comments := token.Comments()
+
+	for _, cmt := range comments {
+		cmt.SetTokenName(tokenName)
+	}
+
+	c.AddComments(node, comments)
+}
+
+func (c Comments) AddFromChildNode(n node.Node, ch node.Node) {
+	c.AddComments(n, c[ch])
+	delete(c, ch)
+}