libstdc++-v3/testsuite/25_algorithms/max_element/check_type.cc

   1 // Copyright (C) 2005-2023 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 25.3.7 [lib.alg.min.max]
  19
  20 // { dg-do compile }
  21
  22 #include <algorithm>
  23 #include <testsuite_iterators.h>
  24
  25 using __gnu_test::forward_iterator_wrapper;
  26
  27 struct S { };
  28
  29 bool
  30 operator<(const S&, const S&) {return true;}
  31
  32 struct X { };
  33
  34 bool
  35 predicate(const X&, const X&) {return true;}
  36
  37 forward_iterator_wrapper<S>
  38 test1(forward_iterator_wrapper<S>& s)
  39 { return std::max_element(s, s); }
  40
  41 forward_iterator_wrapper<X>
  42 test2(forward_iterator_wrapper<X>& x)
  43 { return std::max_element(x, x, predicate); }