6a54dfbfe5
Also standardize the license comment in several files where it was different from what we normally do.
78 lines
1.6 KiB
C++
78 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
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// constexpr void value() const &;
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// constexpr void value() &&;
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#include <cassert>
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#include <concepts>
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#include <expected>
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#include <type_traits>
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#include <utility>
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#include "MoveOnly.h"
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#include "test_macros.h"
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constexpr bool test() {
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// const &
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{
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const std::expected<void, int> e;
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e.value();
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static_assert(std::is_same_v<decltype(e.value()), void>);
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}
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// &
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{
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std::expected<void, int> e;
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e.value();
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static_assert(std::is_same_v<decltype(e.value()), void>);
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}
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// &&
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{
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std::expected<void, int> e;
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std::move(e).value();
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static_assert(std::is_same_v<decltype(std::move(e).value()), void>);
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}
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// const &&
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{
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const std::expected<void, int> e;
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std::move(e).value();
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static_assert(std::is_same_v<decltype(std::move(e).value()), void>);
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}
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return true;
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}
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void testException() {
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#ifndef TEST_HAS_NO_EXCEPTIONS
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// int
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{
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const std::expected<void, int> e(std::unexpect, 5);
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try {
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e.value();
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assert(false);
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} catch (const std::bad_expected_access<int>& ex) {
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assert(ex.error() == 5);
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}
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}
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#endif // TEST_HAS_NO_EXCEPTIONS
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}
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int main(int, char**) {
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test();
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static_assert(test());
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testException();
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return 0;
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}
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