| //===----------------------------------------------------------------------===// |
| // |
| // 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> |
| |
| // constexpr mdspan(data_handle_type p, const mapping_type& m); |
| // |
| // Constraints: is_default_constructible_v<accessor_type> is true. |
| // |
| // Preconditions: [0, m.required_span_size()) is an accessible range of p and acc_ |
| // for the value of acc_ after the invocation of this constructor. |
| // |
| // Effects: |
| // - Direct-non-list-initializes ptr_ with std::move(p), |
| // - direct-non-list-initializes map_ with m, and |
| // - value-initializes acc_. |
| |
| #include <mdspan> |
| #include <type_traits> |
| #include <concepts> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| #include "../MinimalElementType.h" |
| #include "../CustomTestLayouts.h" |
| #include "CustomTestAccessors.h" |
| |
| template <bool ac, class H, class M, class A> |
| constexpr void test_mdspan_types(const H& handle, const M& map, const A&) { |
| using MDS = std::mdspan<typename A::element_type, typename M::extents_type, typename M::layout_type, A>; |
| |
| static_assert(ac == std::is_default_constructible_v<A>); |
| if constexpr (ac) { |
| if (!std::is_constant_evaluated()) { |
| move_counted_handle<typename MDS::element_type>::move_counter() = 0; |
| } |
| // use formulation of constructor which tests that it is not explicit |
| MDS m = {handle, map}; |
| if (!std::is_constant_evaluated()) { |
| if constexpr (std::is_same_v<H, move_counted_handle<typename MDS::element_type>>) { |
| assert((H::move_counter() == 1)); |
| } |
| } |
| static_assert(!noexcept(MDS(handle, map))); |
| assert(m.extents() == map.extents()); |
| if constexpr (std::equality_comparable<H>) |
| assert(m.data_handle() == handle); |
| if constexpr (std::equality_comparable<M>) |
| assert(m.mapping() == map); |
| if constexpr (std::equality_comparable<A>) |
| assert(m.accessor() == A()); |
| } else { |
| static_assert(!std::is_constructible_v<MDS, const H&, const M&>); |
| } |
| } |
| |
| template <bool ac, class H, class L, class A> |
| constexpr void mixin_extents(const H& handle, const L& layout, const A& acc) { |
| constexpr size_t D = std::dynamic_extent; |
| test_mdspan_types<ac>(handle, construct_mapping(layout, std::extents<int>()), acc); |
| test_mdspan_types<ac>(handle, construct_mapping(layout, std::extents<signed char, D>(7)), acc); |
| test_mdspan_types<ac>(handle, construct_mapping(layout, std::extents<unsigned, 7>()), acc); |
| test_mdspan_types<ac>(handle, construct_mapping(layout, std::extents<size_t, D, 4, D>(2, 3)), acc); |
| test_mdspan_types<ac>(handle, construct_mapping(layout, std::extents<signed char, D, 7, D>(0, 3)), acc); |
| test_mdspan_types<ac>(handle, construct_mapping(layout, std::extents<int64_t, D, 7, D, 4, D, D>(1, 2, 3, 2)), acc); |
| } |
| |
| template <bool ac, class H, class A> |
| constexpr void mixin_layout(const H& handle, const A& acc) { |
| mixin_extents<ac>(handle, std::layout_left(), acc); |
| mixin_extents<ac>(handle, std::layout_right(), acc); |
| mixin_extents<ac>(handle, layout_wrapping_integral<4>(), acc); |
| } |
| |
| template <class T> |
| constexpr void mixin_accessor() { |
| ElementPool<T, 1024> elements; |
| mixin_layout<true>(elements.get_ptr(), std::default_accessor<T>()); |
| |
| // Using weird accessor/data_handle |
| // Make sure they actually got the properties we want to test |
| // checked_accessor is not default constructible except for const double, where it is not noexcept |
| static_assert(std::is_default_constructible_v<checked_accessor<T>> == std::is_same_v<T, const double>); |
| mixin_layout<std::is_same_v<T, const double>>( |
| typename checked_accessor<T>::data_handle_type(elements.get_ptr()), checked_accessor<T>(1024)); |
| } |
| |
| template <class E> |
| using mapping_t = typename std::layout_right::template mapping<E>; |
| |
| constexpr bool test() { |
| mixin_accessor<int>(); |
| mixin_accessor<const int>(); |
| mixin_accessor<double>(); |
| mixin_accessor<const double>(); |
| mixin_accessor<MinimalElementType>(); |
| mixin_accessor<const MinimalElementType>(); |
| |
| constexpr size_t D = std::dynamic_extent; |
| using mds_t = std::mdspan<float, std::extents<int, 3, D, D>>; |
| |
| // sanity check |
| static_assert(std::is_constructible_v<mds_t, float*, mapping_t<std::extents<int, 3, D, D>>>); |
| |
| // test non-constructibility from wrong mapping type |
| // wrong rank |
| static_assert(!std::is_constructible_v<mds_t, float*, mapping_t<std::extents<int, D, D>>>); |
| static_assert(!std::is_constructible_v<mds_t, float*, mapping_t<std::extents<int, D, D, D, D>>>); |
| // wrong type in general: note the map constructor does NOT convert, since it takes by const& |
| static_assert(!std::is_constructible_v<mds_t, float*, mapping_t<std::extents<int, D, D, D>>>); |
| static_assert(!std::is_constructible_v<mds_t, float*, mapping_t<std::extents<unsigned, 3, D, D>>>); |
| |
| // test non-constructibility from wrong handle_type |
| static_assert(!std::is_constructible_v<mds_t, const float*, mapping_t<std::extents<int, 3, D, D>>>); |
| |
| return true; |
| } |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| return 0; |
| } |