From eb221dcc27b7f8f11ec34046e3165508acdf8beb Mon Sep 17 00:00:00 2001
From: flywind <xzsflywind@gmail.com>
Date: Wed, 21 Apr 2021 01:00:44 +0800
Subject: [PATCH] [std/deques] move data instead of copy + destroy (#17800)

---
 lib/pure/collections/deques.nim | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/lib/pure/collections/deques.nim b/lib/pure/collections/deques.nim
index d2d53d993b..582bb02a76 100644
--- a/lib/pure/collections/deques.nim
+++ b/lib/pure/collections/deques.nim
@@ -379,8 +379,7 @@ proc popFirst*[T](deq: var Deque[T]): T {.inline, discardable.} =
 
   emptyCheck(deq)
   dec deq.count
-  result = deq.data[deq.head]
-  destroy(deq.data[deq.head])
+  result = move deq.data[deq.head]
   deq.head = (deq.head + 1) and deq.mask
 
 proc popLast*[T](deq: var Deque[T]): T {.inline, discardable.} =
@@ -398,8 +397,7 @@ proc popLast*[T](deq: var Deque[T]): T {.inline, discardable.} =
   emptyCheck(deq)
   dec deq.count
   deq.tail = (deq.tail - 1) and deq.mask
-  result = deq.data[deq.tail]
-  destroy(deq.data[deq.tail])
+  result = move deq.data[deq.tail]
 
 proc clear*[T](deq: var Deque[T]) {.inline.} =
   ## Resets the deque so that it is empty.