# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1475774923 -7200
# Node ID 1b764ef8a18401918a79f6b624b9958ecf43dd0e
# Parent  589c3a257c010af180c0d39618af94abd222bd6f
Added an origin parent retrieval method, also fixing the ancestors method.

diff -r 589c3a257c01 -r 1b764ef8a184 referencing.py
--- a/referencing.py	Thu Oct 06 14:42:24 2016 +0200
+++ b/referencing.py	Thu Oct 06 19:28:43 2016 +0200
@@ -145,6 +145,15 @@
         self.origin = ref.origin
         self.name = ref.name
 
+    def parent(self):
+
+        "Return the parent of this reference's origin."
+
+        if not self.get_origin():
+            return None
+
+        return self.get_origin().rsplit(".", 1)[0]
+
     def ancestors(self):
 
         """
@@ -152,7 +161,7 @@
         depth.
         """
 
-        if not self.origin:
+        if not self.get_origin():
             return None
 
         parts = self.get_origin().split(".")