# HG changeset patch
# User Lucas Moscovicz <lmoscovicz@fb.com>
# Date 1392229363 28800
# Node ID ed57358398af44184835e133e9530e6952f51be0
# Parent  a979078bd7887ecea94e3c2c0c678bbfa4c585ec
revset: added basic operations to spanset

Added methods __add__, __sub__ and __and__ to duck type more methods in
baseset

diff -r a979078bd788 -r ed57358398af mercurial/revset.py
--- a/mercurial/revset.py	Wed Feb 12 10:16:21 2014 -0800
+++ b/mercurial/revset.py	Wed Feb 12 10:22:43 2014 -0800
@@ -2149,5 +2149,15 @@
         return (x <= self._start and x > self._end) or (x >= self._start and x<
                 self._end)
 
+    def __and__(self, x):
+        return lazyset(self, lambda r: r in x)
+
+    def __sub__(self, x):
+        return lazyset(self, lambda r: r not in x)
+
+    def __add__(self, x):
+        l = baseset(self)
+        return l + baseset(x)
+
 # tell hggettext to extract docstrings from these functions:
 i18nfunctions = symbols.values()