From 53a420fba21cf1644972b34dcd811a43cdb8368d Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 2 Jan 2017 19:18:58 +0000
Subject: Vendor import of libc++ trunk r290819:
 https://llvm.org/svn/llvm-project/libcxx/trunk@290819

---
 .../func.wrap.func.con/F_assign.pass.cpp            | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'test/std/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/F_assign.pass.cpp')

diff --git a/test/std/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/F_assign.pass.cpp b/test/std/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/F_assign.pass.cpp
index 11716e7946b0..e927ad42c06b 100644
--- a/test/std/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/F_assign.pass.cpp
+++ b/test/std/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/F_assign.pass.cpp
@@ -19,6 +19,7 @@
 #include <functional>
 #include <cassert>
 
+#include "test_macros.h"
 #include "count_new.hpp"
 
 class A
@@ -52,6 +53,17 @@ int A::count = 0;
 
 int g(int) {return 0;}
 
+#if TEST_STD_VER >= 11
+struct RValueCallable {
+    template <class ...Args>
+    void operator()(Args&&...) && {}
+};
+struct LValueCallable {
+    template <class ...Args>
+    void operator()(Args&&...) & {}
+};
+#endif
+
 int main()
 {
     assert(globalMemCounter.checkOutstandingNewEq(0));
@@ -95,4 +107,13 @@ int main()
     assert(f.target<int(*)(int)>() != 0);
     f(1);
     }
+#if TEST_STD_VER >= 11
+    {
+        using Fn = std::function<void(int, int, int)>;
+        static_assert(std::is_assignable<Fn&, LValueCallable&>::value, "");
+        static_assert(std::is_assignable<Fn&, LValueCallable>::value, "");
+        static_assert(!std::is_assignable<Fn&, RValueCallable&>::value, "");
+        static_assert(!std::is_assignable<Fn&, RValueCallable>::value, "");
+    }
+#endif
 }
-- 
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