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, c++23 |
9 | |
10 | // <mdspan> |
11 | |
12 | // template<size_t Rank, class IndexType = size_t> |
13 | // using dims = 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 | |
24 | template <class IndexType> |
25 | void test_alias_template_dims() { |
26 | constexpr size_t D = std::dynamic_extent; |
27 | ASSERT_SAME_TYPE(std::dims<0, IndexType>, std::extents<IndexType>); |
28 | ASSERT_SAME_TYPE(std::dims<1, IndexType>, std::extents<IndexType, D>); |
29 | ASSERT_SAME_TYPE(std::dims<2, IndexType>, std::extents<IndexType, D, D>); |
30 | ASSERT_SAME_TYPE(std::dims<3, IndexType>, std::extents<IndexType, D, D, D>); |
31 | ASSERT_SAME_TYPE(std::dims<9, IndexType>, std::extents<IndexType, D, D, D, D, D, D, D, D, D>); |
32 | } |
33 | |
34 | template <> |
35 | void test_alias_template_dims<size_t>() { |
36 | constexpr size_t D = std::dynamic_extent; |
37 | ASSERT_SAME_TYPE(std::dims<0>, std::extents<size_t>); |
38 | ASSERT_SAME_TYPE(std::dims<1>, std::extents<size_t, D>); |
39 | ASSERT_SAME_TYPE(std::dims<2>, std::extents<size_t, D, D>); |
40 | ASSERT_SAME_TYPE(std::dims<3>, std::extents<size_t, D, D, D>); |
41 | ASSERT_SAME_TYPE(std::dims<9>, std::extents<size_t, D, D, D, D, D, D, D, D, D>); |
42 | } |
43 | |
44 | int main(int, char**) { |
45 | test_alias_template_dims<int>(); |
46 | test_alias_template_dims<unsigned int>(); |
47 | test_alias_template_dims<size_t>(); |
48 | return 0; |
49 | } |
50 | |