glayzzle#194 - add a setTrailingComments helper

Author: ichiriac

src/ast.js

@@ -287,6 +287,7 @@ AST.prototype.prepare = function(kind, docs, parser) {
     node.apply(astNode, args);
     result.instance = astNode;
     if (result.trailingComments) {
+      // buffer of trailingComments
       astNode.trailingComments = result.trailingComments;
     }
     return self.resolvePrecedence(astNode);
@@ -305,7 +306,7 @@ AST.prototype.prepare = function(kind, docs, parser) {
   result.setTrailingComments = function(docs) {
     if (result.instance) {
       // already created
-      result.instance.trailingComments = docs;
+      result.instance.setTrailingComments(docs);
     } else {
       result.trailingComments = docs;
     }

src/ast/node.js

@@ -23,6 +23,14 @@ const Node = function Node(kind, docs, location) {
   }
 };
 
+/**
+ * Attach comments to current node
+ * @param {*} docs
+ */
+Node.prototype.setTrailingComments = function(docs) {
+  this.trailingComments = docs;
+};
+
 /**
  * Includes current token position of the parser
  * @param {*} parser