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authorRuslan Mustakov <r.mustakov@gmail.com>2016-11-02 20:04:08 +0700
committerRuslan Mustakov <r.mustakov@gmail.com>2016-11-03 10:50:43 +0700
commitf2bded180f1c5fcb0994bc7d86d6221cd9ba6504 (patch)
treee43597fdb6e27e1c3bbdfbac655ea97e1b77f594 /lib/pure/includes
parent5842f7d0d250eab6e5d3a4c0fb75f5bdc4a86d53 (diff)
downloadNim-f2bded180f1c5fcb0994bc7d86d6221cd9ba6504.tar.gz
async all() now immediately completes if arg is empty
Diffstat (limited to 'lib/pure/includes')
-rw-r--r--lib/pure/includes/asyncfutures.nim7
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/pure/includes/asyncfutures.nim b/lib/pure/includes/asyncfutures.nim
index d78464a91..dfcfa37a0 100644
--- a/lib/pure/includes/asyncfutures.nim
+++ b/lib/pure/includes/asyncfutures.nim
@@ -246,6 +246,7 @@ proc `or`*[T, Y](fut1: Future[T], fut2: Future[Y]): Future[void] =
 proc all*[T](futs: varargs[Future[T]]): auto =
   ## Returns a future which will complete once
   ## all futures in ``futs`` complete.
+  ## If the argument is empty, the returned future completes immediately.
   ##
   ## If the awaited futures are not ``Future[void]``, the returned future
   ## will hold the values of all awaited futures in a sequence.
@@ -270,6 +271,9 @@ proc all*[T](futs: varargs[Future[T]]): auto =
           if completedFutures == totalFutures:
             retFuture.complete()
 
+    if totalFutures == 0:
+      retFuture.complete()
+
     return retFuture
 
   else:
@@ -292,4 +296,7 @@ proc all*[T](futs: varargs[Future[T]]): auto =
 
       setCallback(i)
 
+    if retValues.len == 0:
+      retFuture.complete(retValues)
+
     return retFuture