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// { dg-do compile }

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

// Copyright (C) 2008, 2009, 2010, 2011 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>

#include <type_traits>

struct X {};

struct int_result_type { typedef int result_type; };

struct derives_unary : std::unary_function<int, int> {};

struct derives_binary : std::binary_function<int, float, int> {};

struct derives_unary_binary

  : std::unary_function<int, int>,

    std::binary_function<int, float, int>

{

  typedef int result_type;

};

void test01()

{

  using std::reference_wrapper;

  using std::is_same;

  // Check result_type typedef

  static_assert( is_same<reference_wrapper<int_result_type>::result_type, int>::value, "has result_type" );

  static_assert( is_same<reference_wrapper<derives_unary>::result_type, int>::value, "has result_type" );

  static_assert( is_same<reference_wrapper<derives_binary>::result_type, int>::value, "has result_type" );

  static_assert( is_same<reference_wrapper<derives_unary_binary>::result_type, int>::value, "has result_type" );

  static_assert( is_same<reference_wrapper<int(void)>::result_type, int>::value, "has result_type" );

  static_assert( is_same<reference_wrapper<int(*)(void)>::result_type, int>::value, "has result_type" );

  static_assert( is_same<reference_wrapper<int (::X::*)()>::result_type, int>::value, "has result_type" );

  static_assert( is_same<reference_wrapper<int (::X::*)(float)>::result_type, int>::value, "has result_type" );

}

int main()

{

  test01();

  return 0;

}