sync cocos2d#20007 to v4

Author: minggo

cocos/2d/CCNode.cpp

@@ -809,22 +809,27 @@ void Node::enumerateChildren(const std::string &name, std::function<bool (Node *
 
     // Remove '//', '/..' if exist
     std::string newName = name.substr(subStrStartPos, subStrlength);
-
+    
+    const Node* target = this;
+    
     if (searchFromParent)
     {
-        newName.insert(0, "[[:alnum:]]+/");
+        if (nullptr == _parent)
+        {
+            return;
+        }
+        target = _parent;
     }
 
-    
     if (searchRecursively)
     {
         // name is '//xxx'
-        doEnumerateRecursive(this, newName, callback);
+        target->doEnumerateRecursive(this, newName, callback);
     }
     else
     {
         // name is xxx
-        doEnumerate(newName, callback);
+        target->doEnumerate(newName, callback);
     }
 }
 

cocos/2d/CCNode.h

@@ -794,7 +794,7 @@ class CC_DLL Node : public Ref
      * @param name The name to search for, supports c++11 regular expression.
      * Search syntax options:
      * `//`: Can only be placed at the begin of the search string. This indicates that it will search recursively.
-     * `..`: The search should move up to the node's parent. Can only be placed at the end of string.
+     * `/..`: The search should move up to the node's parent. Can only be placed at the end of string.
      * `/` : When placed anywhere but the start of the search string, this indicates that the search should move to the node's children.
      *
      * @code