libstdc++-v3/testsuite/20_util/function_objects/mem_fn/adl.cc

// { dg-options "-std=gnu++0x" }
// { dg-do compile }

// Copyright (C) 2012-2014 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

#include <functional>

namespace n {
  struct X { int i; };
  void mem_fn(int X::*);
}

using n::X;

X x{};
int X::* p = &X::i;

int test01()
{
  auto ref = std::ref(p);
  return ref(x);
}

int test02()
{
  std::function<int(X)> fun(p);
  return fun(x);
}