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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>
// Test default construction:
//
// constexpr extents() noexcept = default;
//
// Remarks: since the standard uses an exposition only array member, dynamic extents
// need to be zero initialized!
#include <mdspan>
#include <cassert>
#include <array>
#include "../ConvertibleToIntegral.h"
#include "CtorTestCombinations.h"
#include "test_macros.h"
struct DefaultCtorTest {
template <class E, class AllExtents, class Extents, size_t... Indices>
static constexpr void test_construction(AllExtents all_ext, Extents, std::index_sequence<Indices...>) {
// This function gets called twice: once with Extents being just the dynamic ones, and once with all the extents specified.
// We only test during the all extent case, since then Indices is the correct number. This allows us to reuse the same
// testing machinery used in other constructor tests.
if constexpr (sizeof...(Indices) == E::rank()) {
ASSERT_NOEXCEPT(E{});
// Need to construct new expected values, replacing dynamic values with 0
std::array<typename AllExtents::value_type, E::rank()> expected_exts{
((E::static_extent(Indices) == std::dynamic_extent)
? typename AllExtents::value_type(0)
: all_ext[Indices])...};
test_runtime_observers(E{}, expected_exts);
}
}
};
int main(int, char**) {
test_index_type_combo<DefaultCtorTest>();
static_assert(test_index_type_combo<DefaultCtorTest>());
return 0;
}
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