| //===----------------------------------------------------------------------===// |
| // |
| // 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> |
| |
| // Test default construction: |
| // |
| // constexpr extents() noexcept = default; |
| // |
| // Remarks: since the standard uses an exposition only array member, dynamic extents |
| // need to be zero initialized! |
| |
| #include <mdspan> |
| #include <cassert> |
| #include <array> |
| |
| #include "../ConvertibleToIntegral.h" |
| #include "CtorTestCombinations.h" |
| #include "test_macros.h" |
| |
| struct DefaultCtorTest { |
| template <class E, class AllExtents, class Extents, size_t... Indices> |
| static constexpr void test_construction(AllExtents all_ext, Extents, std::index_sequence<Indices...>) { |
| // This function gets called twice: once with Extents being just the dynamic ones, and once with all the extents specified. |
| // We only test during the all extent case, since then Indices is the correct number. This allows us to reuse the same |
| // testing machinery used in other constructor tests. |
| if constexpr (sizeof...(Indices) == E::rank()) { |
| ASSERT_NOEXCEPT(E{}); |
| // Need to construct new expected values, replacing dynamic values with 0 |
| std::array<typename AllExtents::value_type, E::rank()> expected_exts{ |
| ((E::static_extent(Indices) == std::dynamic_extent) |
| ? typename AllExtents::value_type(0) |
| : all_ext[Indices])...}; |
| test_runtime_observers(E{}, expected_exts); |
| } |
| } |
| }; |
| |
| int main(int, char**) { |
| test_index_type_combo<DefaultCtorTest>(); |
| static_assert(test_index_type_combo<DefaultCtorTest>()); |
| return 0; |
| } |
