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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
// <mdspan>
// template<class IndexType, size_t Rank>
// using dextents = 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_dextents() {
constexpr size_t D = std::dynamic_extent;
ASSERT_SAME_TYPE(std::dextents<IndexType, 0>, std::extents<IndexType>);
ASSERT_SAME_TYPE(std::dextents<IndexType, 1>, std::extents<IndexType, D>);
ASSERT_SAME_TYPE(std::dextents<IndexType, 2>, std::extents<IndexType, D, D>);
ASSERT_SAME_TYPE(std::dextents<IndexType, 3>, std::extents<IndexType, D, D, D>);
ASSERT_SAME_TYPE(std::dextents<IndexType, 9>, std::extents<IndexType, D, D, D, D, D, D, D, D, D>);
}
int main(int, char**) {
test_alias_template_dextents<int>();
test_alias_template_dextents<unsigned int>();
test_alias_template_dextents<size_t>();
return 0;
}
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