// 2001-06-18 Benjamin Kosnik <bkoz@redhat.com>// Copyright (C) 2001, 2009 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/>.// 20.3.3 Comparisons#include <functional>class gnu_obj{int i;public:gnu_obj(int arg = 0): i(arg) { }bool operator==(const gnu_obj& rhs) const { return i == rhs.i; }bool operator!=(const gnu_obj& rhs) const { return i != rhs.i; }bool operator<(const gnu_obj& rhs) const { return i < rhs.i; }};template<typename T>struct gnu_t{bool b;public:gnu_t(bool arg = 0): b(arg) { }bool operator==(const gnu_t& rhs) const { return b == rhs.b; }bool operator!=(const gnu_t& rhs) const { return b != rhs.b; }bool operator<(const gnu_t& rhs) const { return b == rhs.b; }};template struct std::not_equal_to<void*>;template struct std::not_equal_to<gnu_obj>;template struct std::not_equal_to<gnu_t<long> >;int main(){return 0;}