| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 |
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| 9 | |
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| 10 | // <mdspan> |
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| 11 | |
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| 12 | // Test default construction: |
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| 13 | // |
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| 14 | // constexpr extents() noexcept = default; |
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| 15 | // |
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| 16 | // Remarks: since the standard uses an exposition only array member, dynamic extents |
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| 17 | // need to be zero initialized! |
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| 18 | |
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| 19 | #include <mdspan> |
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| 20 | #include <cassert> |
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| 21 | #include <array> |
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| 22 | |
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| 23 | #include "../ConvertibleToIntegral.h" |
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| 24 | #include "CtorTestCombinations.h" |
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| 25 | #include "test_macros.h" |
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| 26 | |
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| 27 | struct DefaultCtorTest { |
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| 28 | template <class E, class AllExtents, class Extents, size_t... Indices> |
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| 29 | static constexpr void test_construction(AllExtents all_ext, Extents, std::index_sequence<Indices...>) { |
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| 30 | // This function gets called twice: once with Extents being just the dynamic ones, and once with all the extents specified. |
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| 31 | // We only test during the all extent case, since then Indices is the correct number. This allows us to reuse the same |
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| 32 | // testing machinery used in other constructor tests. |
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| 33 | if constexpr (sizeof...(Indices) == E::rank()) { |
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| 34 | ASSERT_NOEXCEPT(E{}); |
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| 35 | // Need to construct new expected values, replacing dynamic values with 0 |
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| 36 | std::array<typename AllExtents::value_type, E::rank()> expected_exts{ |
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| 37 | ((E::static_extent(Indices) == std::dynamic_extent) |
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| 38 | ? typename AllExtents::value_type(0) |
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| 39 | : all_ext[Indices])...}; |
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| 40 | test_runtime_observers(E{}, expected_exts); |
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| 41 | } |
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| 42 | } |
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| 43 | }; |
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| 44 | |
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| 45 | int main(int, char**) { |
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| 46 | test_index_type_combo<DefaultCtorTest>(); |
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| 47 | static_assert(test_index_type_combo<DefaultCtorTest>()); |
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| 48 | return 0; |
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| 49 | } |
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| 50 | |
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