| //===----------------------------------------------------------------------===// |
| // |
| // 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, c++20 |
| |
| // <mdspan> |
| |
| // namespace std { |
| // template<class Extents> |
| // class layout_left::mapping { |
| // |
| // ... |
| // static constexpr bool is_always_unique() noexcept { return true; } |
| // static constexpr bool is_always_exhaustive() noexcept { return true; } |
| // static constexpr bool is_always_strided() noexcept { return true; } |
| // |
| // static constexpr bool is_unique() noexcept { return true; } |
| // static constexpr bool is_exhaustive() noexcept { return true; } |
| // static constexpr bool is_strided() noexcept { return true; } |
| // ... |
| // }; |
| // } |
| |
| #include <mdspan> |
| #include <type_traits> |
| #include <concepts> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| template <class E> |
| constexpr void test_layout_mapping_left() { |
| using M = std::layout_left::template mapping<E>; |
| assert(M::is_unique() == true); |
| assert(M::is_exhaustive() == true); |
| assert(M::is_strided() == true); |
| assert(M::is_always_unique() == true); |
| assert(M::is_always_exhaustive() == true); |
| assert(M::is_always_strided() == true); |
| ASSERT_NOEXCEPT(std::declval<M>().is_unique()); |
| ASSERT_NOEXCEPT(std::declval<M>().is_exhaustive()); |
| ASSERT_NOEXCEPT(std::declval<M>().is_strided()); |
| ASSERT_NOEXCEPT(M::is_always_unique()); |
| ASSERT_NOEXCEPT(M::is_always_exhaustive()); |
| ASSERT_NOEXCEPT(M::is_always_strided()); |
| } |
| |
| constexpr bool test() { |
| constexpr size_t D = std::dynamic_extent; |
| test_layout_mapping_left<std::extents<int>>(); |
| test_layout_mapping_left<std::extents<signed char, 4, 5>>(); |
| test_layout_mapping_left<std::extents<unsigned, D, 4>>(); |
| test_layout_mapping_left<std::extents<size_t, D, D, D, D>>(); |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| return 0; |
| } |