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a945c346 | 1 | // Copyright (C) 2019-2024 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 | ||
7dbb6913 | 18 | // { dg-do compile { target c++20 } } |
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19 | |
20 | #include <algorithm> | |
21 | #include <array> | |
ac73c944 | 22 | #include <functional> |
3a66e68a | 23 | |
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24 | // heap |
25 | constexpr std::array<int, 23> | |
26 | ahu{{22, | |
27 | 21, 20, | |
28 | 17, 16, 19, 18,//v | |
29 | 11, 10, 9, 8, 23, 14, 13, 12, 3, 2, 1, 0, 7, 6, 5, 4}}; | |
30 | ||
31 | constexpr auto outq = std::is_heap_until(ahu.begin(), ahu.end()); | |
32 | ||
33 | constexpr auto outr = std::is_heap_until(ahu.begin(), ahu.end(), | |
34 | std::less<int>()); | |
35 | ||
36 | constexpr bool | |
37 | test() | |
38 | { | |
39 | return outq == ahu.begin() + 11 && outr == ahu.begin() + 11; | |
40 | } | |
41 | ||
42 | static_assert(test()); |