| // Copyright (C) 2019-2021 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 <span> |
| |
| using std::span; |
| using std::is_nothrow_constructible_v; |
| |
| static_assert( is_nothrow_constructible_v<span<int>> ); |
| static_assert( is_nothrow_constructible_v<span<int, 0>> ); |
| |
| static_assert( is_nothrow_constructible_v<span<int>, span<int>&> ); |
| static_assert( is_nothrow_constructible_v<span<const int>, span<int>&> ); |
| static_assert( is_nothrow_constructible_v<span<int>, span<int, 1>&> ); |
| static_assert( is_nothrow_constructible_v<span<const int>, span<int, 1>&> ); |
| static_assert( is_nothrow_constructible_v<span<int, 1>, span<int, 1>&> ); |
| static_assert( is_nothrow_constructible_v<span<const int, 1>, span<int, 1>&> ); |
| |
| static_assert( is_nothrow_constructible_v<span<int>, int(&)[1]> ); |
| static_assert( is_nothrow_constructible_v<span<int, 1>, int(&)[1]> ); |
| static_assert( is_nothrow_constructible_v<span<int>, std::array<int, 1>&> ); |
| static_assert( is_nothrow_constructible_v<span<int, 1>, std::array<int, 1>&> ); |
| |
| template<bool> |
| struct sentinel { int* p; }; |
| |
| template<bool B> |
| bool operator==(sentinel<B> s, int* p) noexcept { return s.p == p; } |
| |
| template<bool B> |
| std::ptrdiff_t operator-(sentinel<B> s, int* p) noexcept(B) { return s.p - p; } |
| |
| template<bool B> |
| std::ptrdiff_t operator-(int* p, sentinel<B> s) noexcept { return p - s.p; } |
| |
| static_assert(std::sized_sentinel_for<sentinel<true>, int*>); |
| static_assert(std::sized_sentinel_for<sentinel<false>, int*>); |
| |
| static_assert(is_nothrow_constructible_v<span<int>, int*, std::size_t>); |
| static_assert(is_nothrow_constructible_v<span<int>, int*, const int*>); |
| static_assert(is_nothrow_constructible_v<span<int>, int*, sentinel<true>>); |
| static_assert(!is_nothrow_constructible_v<span<int>, int*, sentinel<false>>); |