70bcd81e7a
This patch fixes constexpr default initialization of empty arrays and improves the tests accordingly. Fixes #74375
100 lines
4.1 KiB
C++
100 lines
4.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
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// <mdspan>
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#include <mdspan>
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#include <cassert>
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#include <array>
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#include <span>
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#include "../ConvertibleToIntegral.h"
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#include "test_macros.h"
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// Helper file to implement combinatorial testing of extents constructor
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//
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// std::extents can be constructed from just indices, a std::array, or a std::span
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// In each of those cases one can either provide all extents, or just the dynamic ones
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// If constructed from std::span, the span needs to have a static extent
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// Furthermore, the indices/array/span can have integer types other than index_type
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template <class E, class AllExtents>
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constexpr void test_runtime_observers(E ext, AllExtents expected) {
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for (typename E::rank_type r = 0; r < ext.rank(); r++) {
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ASSERT_SAME_TYPE(decltype(ext.extent(0)), typename E::index_type);
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ASSERT_NOEXCEPT(ext.extent(0));
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assert(ext.extent(r) == static_cast<typename E::index_type>(expected[r]));
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}
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}
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template <class E, class AllExtents>
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constexpr void test_implicit_construction_call(E e, AllExtents all_ext) {
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test_runtime_observers(e, all_ext);
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}
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template <class E, class Test, class AllExtents>
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constexpr void test_construction(AllExtents all_ext) {
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// test construction from all extents
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Test::template test_construction<E>(all_ext, all_ext, std::make_index_sequence<E::rank()>());
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// test construction from just dynamic extents
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// create an array of just the extents corresponding to dynamic values
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std::array<typename AllExtents::value_type, E::rank_dynamic()> dyn_ext{};
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size_t dynamic_idx = 0;
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for (size_t r = 0; r < E::rank(); r++) {
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if (E::static_extent(r) == std::dynamic_extent) {
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dyn_ext[dynamic_idx] = all_ext[r];
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dynamic_idx++;
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}
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}
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Test::template test_construction<E>(all_ext, dyn_ext, std::make_index_sequence<E::rank_dynamic()>());
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}
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template <class T, class TArg, class Test>
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constexpr void test() {
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constexpr size_t D = std::dynamic_extent;
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test_construction<std::extents<T>, Test>(std::array<TArg, 0>{});
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test_construction<std::extents<T, 3>, Test>(std::array<TArg, 1>{3});
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test_construction<std::extents<T, D>, Test>(std::array<TArg, 1>{3});
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test_construction<std::extents<T, 3, 7>, Test>(std::array<TArg, 2>{3, 7});
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test_construction<std::extents<T, 3, D>, Test>(std::array<TArg, 2>{3, 7});
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test_construction<std::extents<T, D, 7>, Test>(std::array<TArg, 2>{3, 7});
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test_construction<std::extents<T, D, D>, Test>(std::array<TArg, 2>{3, 7});
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test_construction<std::extents<T, 3, 7, 9>, Test>(std::array<TArg, 3>{3, 7, 9});
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test_construction<std::extents<T, 3, 7, D>, Test>(std::array<TArg, 3>{3, 7, 9});
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test_construction<std::extents<T, 3, D, D>, Test>(std::array<TArg, 3>{3, 7, 9});
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test_construction<std::extents<T, D, 7, D>, Test>(std::array<TArg, 3>{3, 7, 9});
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test_construction<std::extents<T, D, D, D>, Test>(std::array<TArg, 3>{3, 7, 9});
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test_construction<std::extents<T, 3, D, 9>, Test>(std::array<TArg, 3>{3, 7, 9});
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test_construction<std::extents<T, D, D, 9>, Test>(std::array<TArg, 3>{3, 7, 9});
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test_construction<std::extents<T, D, 7, 9>, Test>(std::array<TArg, 3>{3, 7, 9});
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test_construction<std::extents<T, 1, 2, 3, 4, 5, 6, 7, 8, 9>, Test>(std::array<TArg, 9>{1, 2, 3, 4, 5, 6, 7, 8, 9});
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test_construction<std::extents<T, D, 2, 3, D, 5, D, 7, D, 9>, Test>(std::array<TArg, 9>{1, 2, 3, 4, 5, 6, 7, 8, 9});
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test_construction<std::extents<T, D, D, D, D, D, D, D, D, D>, Test>(std::array<TArg, 9>{1, 2, 3, 4, 5, 6, 7, 8, 9});
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}
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template <class Test>
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constexpr bool test_index_type_combo() {
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test<int, int, Test>();
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test<int, size_t, Test>();
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test<unsigned, int, Test>();
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test<signed char, size_t, Test>();
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test<long long, unsigned, Test>();
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test<size_t, int, Test>();
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test<size_t, size_t, Test>();
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test<int, IntType, Test>();
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test<signed char, IntType, Test>();
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return true;
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}
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