# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@fb.com>
# Date 1412621012 25200
# Node ID 8110405cf8aeab8d183eeb3750b3cf81baaf11c1
# Parent  5a96df266b2b9d74efa0016fd5703e64dccb3fce
revset-limit: use boolean testing instead of `len(revs) < 1`

I'm not sure why we wrote it that way. But smartsets have faster/lazier non-zero
testing than length computation.

diff -r 5a96df266b2b -r 8110405cf8ae mercurial/scmutil.py
--- a/mercurial/scmutil.py	Tue Oct 07 00:18:08 2014 -0700
+++ b/mercurial/scmutil.py	Mon Oct 06 11:43:32 2014 -0700
@@ -478,7 +478,7 @@
         return repo[default]
 
     l = revrange(repo, [revspec])
-    if len(l) < 1:
+    if not l:
         raise util.Abort(_('empty revision set'))
     return repo[l[-1]]