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8d9254fc 1// Copyright (C) 2019-2020 Free Software Foundation, Inc.
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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// { dg-options "-std=gnu++2a" }
19// { dg-do compile { target c++2a } }
20
21#include <algorithm>
22#include <array>
23
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24// heap
25constexpr std::array<int, 23>
26ah{{22,
27 21, 20,
28 17, 16, 19, 18,
29 11, 10, 9, 8, 15, 14, 13, 12, 3, 2, 1, 0, 7, 6, 5, 4}};
30
31constexpr auto outo = std::is_heap(ah.begin(), ah.end());
32
33constexpr auto outp = std::is_heap(ah.begin(), ah.end(), std::less<int>());
34
35constexpr bool
36test()
37{
38 return outo && outp;
39}
40
41static_assert(test());