| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // REQUIRES: has-unix-headers |
| // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 |
| // UNSUPPORTED: libcpp-hardening-mode=none |
| // XFAIL: availability-verbose_abort-missing |
| // ADDITIONAL_COMPILE_FLAGS: -Wno-ctad-maybe-unsupported |
| |
| // FIXME: https://github.com/llvm/llvm-project/issues/64719 |
| // There appear to be some issues around ctad which make it |
| // currently impossible to get this code warning free. |
| // Thus added the additional compile flag above |
| |
| // <mdspan> |
| |
| // template<class OtherExtents> |
| // constexpr explicit(extents_type::rank() > 0) |
| // mapping(const layout_stride::mapping<OtherExtents>& other); |
| // |
| // Constraints: is_constructible_v<extents_type, OtherExtents> is true. |
| // |
| // Preconditions: |
| // - If extents_type::rank() > 0 is true, then for all r in the range [0, extents_type::rank()), |
| // other.stride(r) equals other.extents().fwd-prod-of-extents(r), and |
| // - other.required_span_size() is representable as a value of type index_type ([basic.fundamental]). |
| // |
| // Effects: Direct-non-list-initializes extents_ with other.extents(). |
| |
| #include <mdspan> |
| #include <cassert> |
| |
| #include "check_assertion.h" |
| |
| int main(int, char**) { |
| constexpr size_t D = std::dynamic_extent; |
| |
| // working case |
| { |
| std::layout_stride::mapping arg(std::extents<int, D>(5), std::array<int, 1>{1}); |
| [[maybe_unused]] std::layout_left::mapping<std::extents<size_t, 5>> m(arg); // should work |
| } |
| // mismatch of static extent |
| { |
| std::layout_stride::mapping arg(std::extents<int, D>(5), std::array<int, 1>{1}); |
| TEST_LIBCPP_ASSERT_FAILURE(([=] { std::layout_left::mapping<std::extents<int, 3>> m(arg); }()), |
| "extents construction: mismatch of provided arguments with static extents."); |
| } |
| // non-representability of extents itself |
| { |
| std::layout_stride::mapping arg(std::extents<int, D>(500), std::array<int, 1>{1}); |
| TEST_LIBCPP_ASSERT_FAILURE(([=] { std::layout_left::mapping<std::extents<char, D>> m(arg); }()), |
| "extents ctor: arguments must be representable as index_type and nonnegative"); |
| } |
| // non-representability of required span size |
| { |
| std::layout_stride::mapping arg(std::extents<int, D, D>(100, 3), std::array<int, 2>{1, 100}); |
| TEST_LIBCPP_ASSERT_FAILURE( |
| ([=] { std::layout_left::mapping<std::extents<char, D, D>> m(arg); }()), |
| "layout_left::mapping from layout_stride ctor: other.required_span_size() must be " |
| "representable as index_type."); |
| } |
| // strides are not layout_left compatible |
| { |
| std::layout_stride::mapping arg(std::extents<int, D>(5), std::array<int, 1>{2}); |
| TEST_LIBCPP_ASSERT_FAILURE( |
| ([=] { std::layout_left::mapping<std::extents<size_t, 5>> m(arg); }()), |
| "layout_left::mapping from layout_stride ctor: strides are not compatible with layout_left."); |
| } |
| { |
| std::layout_stride::mapping arg(std::extents<int, D, D>(100, 3), std::array<int, 2>{2, 200}); |
| TEST_LIBCPP_ASSERT_FAILURE( |
| ([=] { std::layout_left::mapping<std::extents<int, D, D>> m(arg); }()), |
| "layout_left::mapping from layout_stride ctor: strides are not compatible with layout_left."); |
| } |
| |
| return 0; |
| } |