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- // Copyright (C) 2020-2022 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*> );
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