Merge to upstream r225300.

Change-Id: I2b23715db9ac129ff80aa78ad5824db0a4d6fbb3

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

@@ -0,0 +1,72 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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, CopyConstructible... Args>
+//   unspecified mem_fn(R (T::* pm)(Args...));
+
+#include <functional>
+#include <cassert>
+
+struct A
+{
+    char test0() {return 'a';}
+    char test1(int) {return 'b';}
+    char test2(int, double) {return 'c';}
+};
+
+template <class F>
+void
+test0(F f)
+{
+    {
+    A a;
+    assert(f(a) == 'a');
+    A* ap = &a;
+    assert(f(ap) == 'a');
+    const F& cf = f;
+    assert(cf(ap) == 'a');
+    }
+}
+
+template <class F>
+void
+test1(F f)
+{
+    {
+    A a;
+    assert(f(a, 1) == 'b');
+    A* ap = &a;
+    assert(f(ap, 2) == 'b');
+    const F& cf = f;
+    assert(cf(ap, 2) == 'b');
+    }
+}
+
+template <class F>
+void
+test2(F f)
+{
+    {
+    A a;
+    assert(f(a, 1, 2) == 'c');
+    A* ap = &a;
+    assert(f(ap, 2, 3.5) == 'c');
+    const F& cf = f;
+    assert(cf(ap, 2, 3.5) == 'c');
+    }
+}
+
+int main()
+{
+    test0(std::mem_fn(&A::test0));
+    test1(std::mem_fn(&A::test1));
+    test2(std::mem_fn(&A::test2));
+}