bdf7da280f
* initializing `short`s with `short`s instead of `int`s to avoid narrowing warnings * Explicitly discard the result of `value` calls to avoid `[[nodiscard]]` warnings Drive-by: `testException` from `value` test is duplicated in `value_or` test; remove the duplicate. Differential Review: https://reviews.llvm.org/D141108
98 lines
2.1 KiB
C++
98 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
|
|
// 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 const T& value() const &;
|
|
// constexpr T& value() &;
|
|
// constexpr T&& value() &&;
|
|
// constexpr const T&& value() const &&;
|
|
|
|
#include <cassert>
|
|
#include <concepts>
|
|
#include <expected>
|
|
#include <type_traits>
|
|
#include <utility>
|
|
|
|
#include "MoveOnly.h"
|
|
#include "test_macros.h"
|
|
|
|
constexpr bool test() {
|
|
// non-const &
|
|
{
|
|
std::expected<int, int> e(5);
|
|
decltype(auto) x = e.value();
|
|
static_assert(std::same_as<decltype(x), int&>);
|
|
assert(&x == &(*e));
|
|
assert(x == 5);
|
|
}
|
|
|
|
// const &
|
|
{
|
|
const std::expected<int, int> e(5);
|
|
decltype(auto) x = e.value();
|
|
static_assert(std::same_as<decltype(x), const int&>);
|
|
assert(&x == &(*e));
|
|
assert(x == 5);
|
|
}
|
|
|
|
// non-const &&
|
|
{
|
|
std::expected<int, int> e(5);
|
|
decltype(auto) x = std::move(e).value();
|
|
static_assert(std::same_as<decltype(x), int&&>);
|
|
assert(&x == &(*e));
|
|
assert(x == 5);
|
|
}
|
|
|
|
// const &&
|
|
{
|
|
const std::expected<int, int> e(5);
|
|
decltype(auto) x = std::move(e).value();
|
|
static_assert(std::same_as<decltype(x), const int&&>);
|
|
assert(&x == &(*e));
|
|
assert(x == 5);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void testException() {
|
|
#ifndef TEST_HAS_NO_EXCEPTIONS
|
|
|
|
// int
|
|
{
|
|
const std::expected<int, int> e(std::unexpect, 5);
|
|
try {
|
|
(void) e.value();
|
|
assert(false);
|
|
} catch (const std::bad_expected_access<int>& ex) {
|
|
assert(ex.error() == 5);
|
|
}
|
|
}
|
|
|
|
// MoveOnly
|
|
{
|
|
std::expected<int, MoveOnly> e(std::unexpect, 5);
|
|
try {
|
|
(void) std::move(e).value();
|
|
assert(false);
|
|
} catch (const std::bad_expected_access<MoveOnly>& ex) {
|
|
assert(ex.error() == 5);
|
|
}
|
|
}
|
|
|
|
#endif // TEST_HAS_NO_EXCEPTIONS
|
|
}
|
|
|
|
int main(int, char**) {
|
|
test();
|
|
static_assert(test());
|
|
testException();
|
|
return 0;
|
|
}
|