From c98e3d2c274ac4bd4227d4e3f7e0d2636827f88c Mon Sep 17 00:00:00 2001
From: Araq <rumpf_a@web.de>
Date: Sat, 1 Dec 2012 19:10:47 +0100
Subject: implements 'export' feature

---
 lib/pure/collections/intsets.nim | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'lib/pure/collections')

diff --git a/lib/pure/collections/intsets.nim b/lib/pure/collections/intsets.nim
index fcaf7b212..2a8d7eec2 100755
--- a/lib/pure/collections/intsets.nim
+++ b/lib/pure/collections/intsets.nim
@@ -190,6 +190,11 @@ proc `$`*(s: TIntSet): string =
   ## The `$` operator for int sets.
   dollarImpl()
 
+proc empty*(s: TIntSet): bool {.inline.} =
+  ## returns true if `s` is empty. This is safe to call even before
+  ## the set has been initialized with `initIntSet`.
+  result = s.counter == 0
+
 when isMainModule:
   var x = initIntSet()
   x.incl(1)
-- 
cgit 1.4.1-2-gfad0