| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // UNSUPPORTED: libcpp-no-concepts |
| // UNSUPPORTED: gcc-10 |
| // UNSUPPORTED: libcpp-has-no-incomplete-ranges |
| |
| // constexpr auto end() requires (!simple-view<V>) |
| // constexpr auto end() const requires range<const V> |
| |
| #include <ranges> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| #include "test_range.h" |
| #include "types.h" |
| |
| constexpr bool test() { |
| int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8}; |
| |
| // sized_range && random_access_iterator |
| { |
| std::ranges::take_view<SizedRandomAccessView> tv(SizedRandomAccessView{buffer}, 0); |
| assert(tv.end() == std::ranges::next(tv.begin(), 0)); |
| ASSERT_SAME_TYPE(decltype(tv.end()), RandomAccessIter); |
| } |
| |
| { |
| const std::ranges::take_view<SizedRandomAccessView> tv(SizedRandomAccessView{buffer}, 1); |
| assert(tv.end() == std::ranges::next(tv.begin(), 1)); |
| ASSERT_SAME_TYPE(decltype(tv.end()), RandomAccessIter); |
| } |
| |
| // sized_range && !random_access_iterator |
| { |
| std::ranges::take_view<SizedForwardView> tv(SizedForwardView{buffer}, 2); |
| assert(tv.end() == std::ranges::next(tv.begin(), 2)); |
| ASSERT_SAME_TYPE(decltype(tv.end()), std::default_sentinel_t); |
| } |
| |
| { |
| const std::ranges::take_view<SizedForwardView> tv(SizedForwardView{buffer}, 3); |
| assert(tv.end() == std::ranges::next(tv.begin(), 3)); |
| ASSERT_SAME_TYPE(decltype(tv.end()), std::default_sentinel_t); |
| } |
| |
| // !sized_range |
| { |
| std::ranges::take_view<ContiguousView> tv(ContiguousView{buffer}, 4); |
| assert(tv.end() == std::ranges::next(tv.begin(), 4)); |
| |
| // The <sentinel> type. |
| static_assert(!std::same_as<decltype(tv.end()), std::default_sentinel_t>); |
| static_assert(!std::same_as<decltype(tv.end()), int*>); |
| } |
| |
| { |
| const std::ranges::take_view<ContiguousView> tv(ContiguousView{buffer}, 5); |
| assert(tv.end() == std::ranges::next(tv.begin(), 5)); |
| } |
| |
| // Just to cover the case where count == 8. |
| { |
| std::ranges::take_view<SizedRandomAccessView> tv(SizedRandomAccessView{buffer}, 8); |
| assert(tv.end() == std::ranges::next(tv.begin(), 8)); |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |