# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@fb.com>
# Date 2014-10-15 11:28:55
# Node ID a43d929d1fa1d2b4a2afde4bda0f51e545491c22
# Parent  2587631c5f8a15492fb6a41b232405e84496a2cc

generatorset: implement __len__

It was the only smartset class without a `__len__` implementation.

diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -2776,6 +2776,11 @@ class generatorset(abstractsmartset):
             self.fastasc = asc.__iter__
             self.fastdesc = asc.__reversed__
 
+    def __len__(self):
+        for x in self._consumegen():
+            pass
+        return len(self._genlist)
+
     def sort(self, reverse=False):
         self._ascending = not reverse