]>
Commit | Line | Data |
---|---|---|
7adcbafe | 1 | // Copyright (C) 2019-2022 Free Software Foundation, Inc. |
8f407473 PC |
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 | |
748086b7 | 6 | // Free Software Foundation; either version 3, or (at your option) |
8f407473 PC |
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 | |
748086b7 JJ |
15 | // with this library; see the file COPYING3. If not see |
16 | // <http://www.gnu.org/licenses/>. | |
8f407473 | 17 | |
9aeb3bef JW |
18 | // { dg-options "-std=gnu++2a" } |
19 | // { dg-do compile { target c++2a } } | |
8f407473 | 20 | |
9aeb3bef | 21 | #include <vector> |
8f407473 | 22 | |
9aeb3bef JW |
23 | // C++20 [iterator.traits]: The type iterator_traits<I>::pointer shall be void |
24 | // for an iterator of class type I that does not support operator->. | |
25 | template<typename I> | |
26 | concept arrow_or_no_pointer = requires (I i) { i.operator->(); } | |
27 | || std::same_as<typename std::iterator_traits<I>::pointer, void>; | |
8f407473 | 28 | |
9aeb3bef JW |
29 | static_assert( arrow_or_no_pointer<std::vector<bool>::iterator> ); |
30 | static_assert( arrow_or_no_pointer<std::vector<bool>::const_iterator> ); |