| // Copyright (C) 2019-2023 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-options "-std=gnu++2a" } |
| // { dg-do compile { target c++2a } } |
| |
| #include <vector> |
| |
| // C++20 [iterator.traits]: The type iterator_traits<I>::pointer shall be void |
| // for an iterator of class type I that does not support operator->. |
| template<typename I> |
| concept arrow_or_no_pointer = requires (I i) { i.operator->(); } |
| || std::same_as<typename std::iterator_traits<I>::pointer, void>; |
| |
| static_assert( arrow_or_no_pointer<std::vector<bool>::iterator> ); |
| static_assert( arrow_or_no_pointer<std::vector<bool>::const_iterator> ); |
