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//===----------------------------------------------------------------------===//
//
// 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, c++23
// <mdspan>
// template<size_t Rank, class IndexType = size_t>
// using dims = see below;
//
// Result: A type E that is a specialization of extents such that
// E::rank() == Rank && E::rank() == E::rank_dynamic() is true,
// and E::index_type denotes IndexType.
#include <mdspan>
#include <cstddef>
#include "test_macros.h"
template <class IndexType>
void test_alias_template_dims() {
constexpr size_t D = std::dynamic_extent;
ASSERT_SAME_TYPE(std::dims<0, IndexType>, std::extents<IndexType>);
ASSERT_SAME_TYPE(std::dims<1, IndexType>, std::extents<IndexType, D>);
ASSERT_SAME_TYPE(std::dims<2, IndexType>, std::extents<IndexType, D, D>);
ASSERT_SAME_TYPE(std::dims<3, IndexType>, std::extents<IndexType, D, D, D>);
ASSERT_SAME_TYPE(std::dims<9, IndexType>, std::extents<IndexType, D, D, D, D, D, D, D, D, D>);
}
template <>
void test_alias_template_dims<size_t>() {
constexpr size_t D = std::dynamic_extent;
ASSERT_SAME_TYPE(std::dims<0>, std::extents<size_t>);
ASSERT_SAME_TYPE(std::dims<1>, std::extents<size_t, D>);
ASSERT_SAME_TYPE(std::dims<2>, std::extents<size_t, D, D>);
ASSERT_SAME_TYPE(std::dims<3>, std::extents<size_t, D, D, D>);
ASSERT_SAME_TYPE(std::dims<9>, std::extents<size_t, D, D, D, D, D, D, D, D, D>);
}
int main(int, char**) {
test_alias_template_dims<int>();
test_alias_template_dims<unsigned int>();
test_alias_template_dims<size_t>();
return 0;
}
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