# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@fb.com>
# Date 1395366928 25200
# Node ID bc95143446e88341be2943253a2ceef76f813a77
# Parent  2631204d73052c8e2b8113083a90bc3f9a0ebf18
_addset: add a __len__ method

Back in the time where repo.revs(...) returned a list, calling `len(...)` on the
result was quite common. We reinstall this on _addset.

There is absolutely no easy way to test this from the command line. The commands
using this in the evolve extension will eventually land into core.

diff -r 2631204d7305 -r bc95143446e8 mercurial/revset.py
--- a/mercurial/revset.py	Wed Mar 19 17:53:45 2014 -0700
+++ b/mercurial/revset.py	Thu Mar 20 18:55:28 2014 -0700
@@ -2464,6 +2464,9 @@
         self._ascending = ascending
         self._genlist = None
 
+    def __len__(self):
+        return len(self._list)
+
     @util.propertycache
     def _list(self):
         if not self._genlist: