Undoing some experimental stuff.

eval_apply.cpp

@@ -647,12 +647,12 @@ namespace Sass {
 
   // Resolve selector extensions.
 
-  void extend_selectors(vector<pair<Node, Node> >& pending, multimap<Node, Node> extensions, Node_Factory& new_Node)
+  void extend_selectors(vector<pair<Node, Node> >& pending, Node_Factory& new_Node)
   {
     for (size_t i = 0, S = pending.size(); i < S; ++i) {
       Node extender(pending[i].second[2]);
       Node ruleset_to_extend(pending[i].first);
-      Node selectors_to_extend(ruleset_to_extend[2]);
+      Node selector_to_extend(ruleset_to_extend[2]);
 
       // if (selectors_to_extend.type() != Node::selector_group) {
       //   Node ext(generate_extension(selectors_to_extend, extender, new_Node));
@@ -793,7 +793,7 @@ namespace Sass {
         } break;
       }
     }
-    return pair<Node, Node>(Node(), Node());
+    return Node();
   }
 
   // Helpers for extracting subsets of selectors

eval_apply.hpp

@@ -20,7 +20,7 @@ namespace Sass {
   Node expand_selector(Node sel, Node pre, Node_Factory& new_Node);
   Node expand_backref(Node sel, Node pre);
   void extend_selectors(vector<pair<Node, Node> >&, Node_Factory&);
-  pair<Node, Node> generate_extension(Node extendee, Node extender, Node_Factory& new_Node);
+  Node generate_extension(Node extendee, Node extender, Node_Factory& new_Node);
 
   Node selector_prefix(Node sel, Node_Factory& new_Node);
   Node selector_base(Node sel);