| // |
| // 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 |
| |
| // <mdspan> |
| |
| // Test construction from integral: |
| // |
| // template<class ... OtherIndexTypes> |
| // constexpr explicit extents(OtherIndexTypes ... exts) noexcept; |
| // |
| // Let N be sizeof...(OtherIndexTypes), and let |
| // exts_arr be array<index_type, N>{static_cast<index_type>(std::move(exts))...}. |
| // |
| // Constraints: |
| // * (is_convertible_v<OtherIndexTypes, index_type> && ...) is true, |
| // * (is_nothrow_constructible_v<index_type, OtherIndexType> && ...) is true, and |
| // * N == rank_dynamic() || N == rank() is true. |
| // |
| // Preconditions: |
| // * If N != rank_dynamic() is true, exts_arr[r] equals Er for each r for which |
| // Er is a static extent, and |
| // * either |
| // - sizeof...(exts) == 0 is true, or |
| // - each element of exts is nonnegative and is representable as a value of type index_type. |
| // |
| |
| #include <mdspan> |
| #include <cassert> |
| |
| #include "check_assertion.h" |
| |
| int main(int, char**) { |
| constexpr size_t D = std::dynamic_extent; |
| // working case |
| { |
| [[maybe_unused]] std::extents<int, D, 5> e1(1000, 5); // should work |
| } |
| // mismatch of static extent |
| { |
| TEST_LIBCPP_ASSERT_FAILURE(([] { std::extents<int, D, 5> e1(1000, 3); }()), |
| "extents construction: mismatch of provided arguments with static extents."); |
| } |
| // value out of range |
| { |
| TEST_LIBCPP_ASSERT_FAILURE(([] { std::extents<char, D, 5> e1(1000, 5); }()), |
| "extents ctor: arguments must be representable as index_type and nonnegative"); |
| } |
| // negative value |
| { |
| TEST_LIBCPP_ASSERT_FAILURE(([] { std::extents<char, D, 5> e1(-1, 5); }()), |
| "extents ctor: arguments must be representable as index_type and nonnegative"); |
| } |
| return 0; |
| } |
