libstdc++-v3/testsuite/20_util/function_objects/comparisons.cc

   1 // 2001-06-18  Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2020 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 20.3.3 Comparisons
  21
  22 #include <functional>
  23
  24 class gnu_obj
  25 {
  26   int i;
  27 public:
  28   gnu_obj(int arg = 0): i(arg) { }
  29   bool operator==(const gnu_obj& rhs) const { return i == rhs.i; }
  30   bool operator!=(const gnu_obj& rhs) const { return i != rhs.i; }
  31   bool operator<(const gnu_obj& rhs) const { return i < rhs.i; }
  32 };
  33
  34 template<typename T>
  35   struct gnu_t
  36   {
  37     bool b;
  38   public:
  39     gnu_t(bool arg = 0): b(arg) { }
  40     bool operator==(const gnu_t& rhs) const { return b == rhs.b; }
  41     bool operator!=(const gnu_t& rhs) const { return b != rhs.b; }
  42     bool operator<(const gnu_t& rhs) const { return b == rhs.b; }
  43   };
  44
  45 template struct std::not_equal_to<void*>;
  46 template struct std::not_equal_to<gnu_obj>;
  47 template struct std::not_equal_to<gnu_t<long> >;
  48
  49 int main()
  50 {
  51   return 0;
  52 }