Merge to upstream r225300.

Change-Id: I2b23715db9ac129ff80aa78ad5824db0a4d6fbb3

test/std/utilities/function.objects/func.memfn/member_data.pass.cpp

@@ -0,0 +1,43 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <functional>
+
+// template<Returnable R, class T> unspecified mem_fn(R T::* pm);
+
+#include <functional>
+#include <cassert>
+
+struct A
+{
+    double data_;
+};
+
+template <class F>
+void
+test(F f)
+{
+    {
+    A a;
+    f(a) = 5;
+    assert(a.data_ == 5);
+    A* ap = &a;
+    f(ap) = 6;
+    assert(a.data_ == 6);
+    const A* cap = ap;
+    assert(f(cap) == f(ap));
+    const F& cf = f;
+    assert(cf(ap) == f(ap));
+    }
+}
+
+int main()
+{
+    test(std::mem_fn(&A::data_));
+}