From 2846a9eb38f9fa6d089a4dca3a6847af7ea52ce2 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Mon, 29 Sep 2014 10:42:16 -0700
Subject: [PATCH] Check if is_copy_assignable is working

is_copy_assignable is broken in MSVC.
---
 test/CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index b0dfa587..56f33e1d 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -38,7 +38,9 @@ endforeach ()
 
 check_cxx_source_compiles("
   #include <type_traits>
-  int main() { return std::is_copy_constructible<int>::value; }" HAVE_TYPE_TRAITS)
+  class C { void operator=(const C&); };
+  int main() { static_assert(std::is_copy_assignable<C>::value, ""); }"
+  HAVE_TYPE_TRAITS)
 if (HAVE_TYPE_TRAITS)
   add_definitions(-DFMT_USE_TYPE_TRAITS=1)
 endif ()