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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
// constexpr void value() const &;
// constexpr void value() &&;
#include <cassert>
#include <concepts>
#include <expected>
#include <type_traits>
#include <utility>
#include "MoveOnly.h"
#include "test_macros.h"
constexpr bool test() {
// const &
{
const std::expected<void, int> e;
e.value();
static_assert(std::is_same_v<decltype(e.value()), void>);
}
// &
{
std::expected<void, int> e;
e.value();
static_assert(std::is_same_v<decltype(e.value()), void>);
}
// &&
{
std::expected<void, int> e;
std::move(e).value();
static_assert(std::is_same_v<decltype(std::move(e).value()), void>);
}
// const &&
{
const std::expected<void, int> e;
std::move(e).value();
static_assert(std::is_same_v<decltype(std::move(e).value()), void>);
}
return true;
}
void testException() {
#ifndef TEST_HAS_NO_EXCEPTIONS
// int
{
const std::expected<void, int> e(std::unexpect, 5);
try {
e.value();
assert(false);
} catch (const std::bad_expected_access<int>& ex) {
assert(ex.error() == 5);
}
}
#endif // TEST_HAS_NO_EXCEPTIONS
}
int main(int, char**) {
test();
static_assert(test());
testException();
return 0;
}
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