introduce 'last_child' method

It is used for perfomance while using set_line_info

--HG--
branch : rebuild

1 files changed, 12 insertions, 0 deletions

diff --git a/node_classes.py b/node_classes.py
index 2ddda5bf..3715a09d 100644
--- a/node_classes.py
+++ b/node_classes.py
@@ -200,6 +200,12 @@ class Compare(NodeNG):
         for _, comparator in self.ops:
             yield comparator # we don't want the 'op'
 
+    def last_child(self):
+        """override last_child"""
+        # XXX maybe if self.ops:
+        return self.ops[-1][1]
+        #return self.left
+
 class Comprehension(NodeNG):
     """class representing a Comprehension node"""
 
@@ -256,6 +262,12 @@ class Dict(NodeNG, Instance):
             yield key
             yield value
 
+    def last_child(self):
+        """override last_child"""
+        if self.items:
+            return self.items[-1][1]
+        return None
+
     def itered(self):
         return self.items[::2]