Implement http://wg21.link/p0302r1: Removing Allocator Support in std::function. These functions never worked, and as far as I know, no one ever called them.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@284164 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/utilities/function.objects/func.wrap/func.wrap.func/derive_from.fail.cpp

@@ -0,0 +1,25 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03
+// XFAIL: c++11, c++14
+
+// <functional>
+
+#include <functional>
+#include <type_traits>
+
+#include "test_macros.h"
+
+struct S : public std::function<void()> { using function::function; };
+
+int main() {
+   S f1( [](){} );
+   S f2(std::allocator_arg, std::allocator<int>{}, f1);
+}