[PATCH 3 of 8] revset: added lazyset implementation to draft revset

[Lucas Moscovicz]

# HG changeset patch
# User Lucas Moscovicz <lmoscovicz at fb.com>
# Date 1391472925 28800
#      Mon Feb 03 16:15:25 2014 -0800
# Node ID 59c42d99bcfdd22636b43dd6beced0e194bf8bf8
# Parent  61bc268f1a6de48f034b049f75f276d7ad67226c
revset: added lazyset implementation to draft revset

diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -674,7 +674,7 @@
     # i18n: "draft" is a keyword
     getargs(x, 0, 0, _("draft takes no arguments"))
     pc = repo._phasecache
-    return baseset([r for r in subset if pc.phase(repo, r) == phases.draft])
+    return lazyset(subset, lambda r: pc.phase(repo, r) == phases.draft)
 
 def extinct(repo, subset, x):
     """``extinct()``