1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
9
10// <mdspan>
11
12// template<class IndexType, size_t Rank>
13// using dextents = see below;
14//
15// Result: A type E that is a specialization of extents such that
16// E::rank() == Rank && E::rank() == E::rank_dynamic() is true,
17// and E::index_type denotes IndexType.
18
19#include <mdspan>
20#include <cstddef>
21
22#include "test_macros.h"
23
24template <class IndexType>
25void test_alias_template_dextents() {
26 constexpr size_t D = std::dynamic_extent;
27 ASSERT_SAME_TYPE(std::dextents<IndexType, 0>, std::extents<IndexType>);
28 ASSERT_SAME_TYPE(std::dextents<IndexType, 1>, std::extents<IndexType, D>);
29 ASSERT_SAME_TYPE(std::dextents<IndexType, 2>, std::extents<IndexType, D, D>);
30 ASSERT_SAME_TYPE(std::dextents<IndexType, 3>, std::extents<IndexType, D, D, D>);
31 ASSERT_SAME_TYPE(std::dextents<IndexType, 9>, std::extents<IndexType, D, D, D, D, D, D, D, D, D>);
32}
33
34int main(int, char**) {
35 test_alias_template_dextents<int>();
36 test_alias_template_dextents<unsigned int>();
37 test_alias_template_dextents<size_t>();
38 return 0;
39}
40

source code of libcxx/test/std/containers/views/mdspan/extents/dextents.pass.cpp