# HG changeset patch
# User Lucas Moscovicz <lmoscovicz@fb.com>
# Date 1394817749 25200
# Node ID 180d47e1fb68138adac2e6b523897da25bdc2af7
# Parent  caa69cb223b09960a777490fd7f1e2d296375a17
revset: added __and__ method to _addset

This method is intended to duck-type baseset, so we will still have _addset as a
private class but  we will be able to return it without wrapping it into an
orderedlazyset or a lazyset.

diff -r caa69cb223b0 -r 180d47e1fb68 mercurial/revset.py
--- a/mercurial/revset.py	Fri Mar 14 10:21:56 2014 -0700
+++ b/mercurial/revset.py	Fri Mar 14 10:22:29 2014 -0700
@@ -2413,6 +2413,12 @@
             if self._ascending:
                 self.reverse()
 
+    def __and__(self, other):
+        filterfunc = other.__contains__
+        if self._ascending is not None:
+            return orderedlazyset(self, filterfunc, ascending=self._ascending)
+        return lazyset(self, filterfunc)
+
     def _iterator(self):
         """Iterate over both collections without repeating elements