| // 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 <ranges> |
| #include <testsuite_iterators.h> |
| |
| static_assert( std::ranges::sized_range<int(&)[1]> ); |
| static_assert( std::ranges::sized_range<const int(&)[1]> ); |
| static_assert( std::ranges::sized_range<int[1]> ); |
| static_assert( !std::ranges::sized_range<int*> ); |
| |
| using namespace __gnu_test; |
| |
| // ranges::size(r) uses (end(r) - begin(r)) |
| static_assert( std::ranges::sized_range<test_contiguous_range<int>> ); |
| static_assert( std::ranges::sized_range<test_contiguous_range<int>&> ); |
| static_assert( std::ranges::sized_range<test_random_access_range<int>> ); |
| static_assert( std::ranges::sized_range<test_random_access_range<int>&> ); |
| // ranges::size(r) is invalid, (end(r) - begin(r)) requires sized sentinel |
| static_assert(!std::ranges::sized_range<test_bidirectional_range<int>> ); |
| static_assert(!std::ranges::sized_range<test_bidirectional_range<int>&> ); |
| static_assert(!std::ranges::sized_range<test_forward_range<int>> ); |
| static_assert(!std::ranges::sized_range<test_forward_range<int>&> ); |
| static_assert(!std::ranges::sized_range<test_input_range<int>> ); |
| static_assert(!std::ranges::sized_range<test_input_range<int>&> ); |
| static_assert(!std::ranges::sized_range<test_output_range<int>> ); |
| static_assert(!std::ranges::sized_range<test_output_range<int>&> ); |
| |
| // ranges::size(r) uses r.size() |
| static_assert( std::ranges::sized_range<test_contiguous_sized_range<int>> ); |
| static_assert( std::ranges::sized_range<test_contiguous_sized_range<int>&> ); |
| static_assert( std::ranges::sized_range<test_random_access_sized_range<int>> ); |
| static_assert( std::ranges::sized_range<test_random_access_sized_range<int>&> ); |
| static_assert( std::ranges::sized_range<test_bidirectional_sized_range<int>> ); |
| static_assert( std::ranges::sized_range<test_bidirectional_sized_range<int>&> ); |
| static_assert( std::ranges::sized_range<test_forward_sized_range<int>> ); |
| static_assert( std::ranges::sized_range<test_forward_sized_range<int>&> ); |
| static_assert( std::ranges::sized_range<test_input_sized_range<int>> ); |
| static_assert( std::ranges::sized_range<test_input_sized_range<int>&> ); |
| static_assert( std::ranges::sized_range<test_output_sized_range<int>> ); |
| static_assert( std::ranges::sized_range<test_output_sized_range<int>&> ); |
| |
| using long_range = __gnu_test::test_random_access_sized_range<long>; |
| template<> constexpr bool std::ranges::disable_sized_range<long_range> = true; |
| |
| // Despite being disabled, this is still a sized_range because ranges::size(r) |
| // works, by using (ranges::end(r) - ranges::begin(r)). |
| static_assert( std::ranges::sized_range<long_range> ); |
| static_assert( std::ranges::sized_range<long_range&> ); |
| |
| using short_range = __gnu_test::test_bidirectional_sized_range<short>; |
| template<> constexpr bool std::ranges::disable_sized_range<short_range> = true; |
| |
| // This is not a sized range because ranges::size(r) cannot use member size, |
| // or ADL size, and (ranges::end(r) - ranges::begin(r)) is ill-formed for |
| // bidirectional iterators. |
| static_assert( !std::ranges::sized_range<short_range> ); |
| static_assert( !std::ranges::sized_range<short_range&> ); |