| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| // friend constexpr bool operator==(iterator const&, sentinel const&); |
| |
| #include <ranges> |
| |
| #include <array> |
| #include <cassert> |
| #include <concepts> |
| #include <utility> |
| #include "test_iterators.h" |
| #include "../types.h" |
| |
| template <class Iterator, class Sentinel = sentinel_wrapper<Iterator>> |
| constexpr void test() { |
| using View = minimal_view<Iterator, Sentinel>; |
| |
| std::array<int, 5> array{0, 1, 2, 3, 4}; |
| |
| { |
| View v(Iterator(array.data()), Sentinel(Iterator(array.data() + array.size()))); |
| std::ranges::filter_view view(std::move(v), AlwaysTrue{}); |
| auto const it = view.begin(); |
| auto const sent = view.end(); |
| std::same_as<bool> decltype(auto) result = (it == sent); |
| assert(!result); |
| } |
| { |
| View v(Iterator(array.data()), Sentinel(Iterator(array.data() + array.size()))); |
| std::ranges::filter_view view(std::move(v), [](auto) { return false; }); |
| auto const it = view.begin(); |
| auto const sent = view.end(); |
| std::same_as<bool> decltype(auto) result = (it == sent); |
| assert(result); |
| } |
| } |
| |
| constexpr bool tests() { |
| test<cpp17_input_iterator<int*>>(); |
| test<cpp20_input_iterator<int*>>(); |
| test<forward_iterator<int*>>(); |
| test<bidirectional_iterator<int*>>(); |
| test<random_access_iterator<int*>>(); |
| test<contiguous_iterator<int*>>(); |
| test<int*>(); |
| return true; |
| } |
| |
| int main(int, char**) { |
| tests(); |
| static_assert(tests()); |
| return 0; |
| } |