--- a/mercurial/revset.py Thu Oct 02 18:35:56 2014 -0500
+++ b/mercurial/revset.py Tue Sep 30 22:26:34 2014 -0500
@@ -2218,6 +2218,14 @@
"""iterate the set in the order it is supposed to be iterated"""
raise NotImplementedError()
+ # Attributes containing a function to perform a fast iteration in a given
+ # direction. A smartset can have none, one, or both defined.
+ #
+ # Default value is None instead of a function returning None to avoid
+ # initializing an iterator just for testing if a fast method exists.
+ fastasc = None
+ fastdesc = None
+
def isascending(self):
"""True if the set will iterate in ascending order"""
raise NotImplementedError()