| // Copyright (C) 2020-2023 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 <ranges> |
| |
| using S1 = std::ranges::subrange<int*>; |
| using S2 = std::ranges::subrange<long*, void*>; |
| |
| static_assert( std::tuple_size_v<S1> == 2 ); |
| static_assert( std::tuple_size_v<S2> == 2 ); |
| |
| static_assert( std::same_as<std::tuple_element_t<0, S1>, int*> ); |
| static_assert( std::same_as<std::tuple_element_t<1, S1>, int*> ); |
| // LWG 3398 |
| static_assert( std::same_as<std::tuple_element_t<0, const S1>, int*> ); |
| static_assert( std::same_as<std::tuple_element_t<1, const S1>, int*> ); |
| |
| static_assert( std::same_as<std::tuple_element_t<0, S2>, long*> ); |
| static_assert( std::same_as<std::tuple_element_t<1, S2>, void*> ); |
| // LWG 3398 |
| static_assert( std::same_as<std::tuple_element_t<0, const S2>, long*> ); |
| static_assert( std::same_as<std::tuple_element_t<1, const S2>, void*> ); |
| |
| S1 s1; |
| static_assert( std::same_as<decltype(std::get<0>(s1)), int*> ); |
| static_assert( std::same_as<decltype(std::get<1>(s1)), int*> ); |
| const S1 c1; |
| static_assert( std::same_as<decltype(std::get<0>(c1)), int*> ); |
| static_assert( std::same_as<decltype(std::get<1>(c1)), int*> ); |
| S2 s2; |
| static_assert( std::same_as<decltype(std::get<0>(s2)), long*> ); |
| static_assert( std::same_as<decltype(std::get<1>(s2)), void*> ); |
| const S2 c2; |
| static_assert( std::same_as<decltype(std::get<0>(c2)), long*> ); |
| static_assert( std::same_as<decltype(std::get<1>(c2)), void*> ); |