//===----------------------------------------------------------------------===//
//
// 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
// T& <copyable-box>::operator*()
// T const& <copyable-box>::operator*() const
#include <ranges>
#include <cassert>
#include <type_traits>
#include <utility> // in_place_t
#include "types.h"
template <class T>
constexpr void check() {
// non-const version
{
std::ranges::__movable_box<T> x(std::in_place, 10);
T& result = *x;
static_assert(noexcept(*x));
assert(result.value == 10);
}
// const version
{
std::ranges::__movable_box<T> const x(std::in_place, 10);
T const& result = *x;
static_assert(noexcept(*x));
assert(result.value == 10);
}
}
constexpr bool test() {
check<CopyConstructible>(); // primary template
check<Copyable>(); // optimization #1
check<NothrowCopyConstructible>(); // optimization #2
return true;
}
int main(int, char**) {
assert(test());
static_assert(test());
return 0;
}