From e5285fd6b6379598c8e7b4ce8c0a315ddef225ca Mon Sep 17 00:00:00 2001
From: Howard Hinnant <hhinnant@apple.com>
Date: Wed, 15 Feb 2012 15:08:30 +0000
Subject: [PATCH] Remove reference from common_type definition.  It looks like
 a recent clang decltype implementation got fixed/improved and exposed this. 
 Fixes http://llvm.org/bugs/show_bug.cgi?id=12007.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@150581 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/type_traits | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/type_traits b/include/type_traits
index 5911c039..2bf520a3 100644
--- a/include/type_traits
+++ b/include/type_traits
@@ -1144,7 +1144,7 @@ private:
     static _Up __u();
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 public:
-    typedef decltype(true ? __t() : __u()) type;
+    typedef typename remove_reference<decltype(true ? __t() : __u())>::type type;
 };
 
 #else  // _LIBCPP_HAS_NO_VARIADICS