# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@fb.com>
# Date 1412193796 18000
# Node ID d8a08b68f754d8d93a01b0e671748134a58661de
# Parent  d7ab5684711f10e0dd20a833728d60f0868411bd
revset: add a `__nonzero__` to baseset

We are about to add a base class for `baseset` with an abstract `__nonzero__`
method. So we need this method to be explicitly defined to avoid issues. The
built-in list object apparently does not have a `__nonzero__` and relies on
`__len__` for this purpose?

diff -r d7ab5684711f -r d8a08b68f754 mercurial/revset.py
--- a/mercurial/revset.py	Wed Oct 01 15:50:54 2014 -0500
+++ b/mercurial/revset.py	Wed Oct 01 15:03:16 2014 -0500
@@ -2238,6 +2238,9 @@
     def __contains__(self):
         return self.set().__contains__
 
+    def __nonzero__(self):
+        return bool(len(self))
+
     def __sub__(self, other):
         """Returns a new object with the substraction of the two collections.