| 1 | //===----------------------------------------------------------------------===// |
|---|
| 2 | // |
|---|
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
|---|
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
|---|
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
|---|
| 6 | // |
|---|
| 7 | //===----------------------------------------------------------------------===// |
|---|
| 8 | |
|---|
| 9 | // UNSUPPORTED: c++03, c++11, c++14 |
|---|
| 10 | // <optional> |
|---|
| 11 | |
|---|
| 12 | // template <class T> constexpr bool operator!=(const optional<T>& x, nullopt_t) noexcept; |
|---|
| 13 | // template <class T> constexpr bool operator!=(nullopt_t, const optional<T>& x) noexcept; |
|---|
| 14 | |
|---|
| 15 | #include <optional> |
|---|
| 16 | |
|---|
| 17 | #include "test_macros.h" |
|---|
| 18 | |
|---|
| 19 | int main(int, char**) |
|---|
| 20 | { |
|---|
| 21 | using std::optional; |
|---|
| 22 | using std::nullopt_t; |
|---|
| 23 | using std::nullopt; |
|---|
| 24 | |
|---|
| 25 | { |
|---|
| 26 | typedef int T; |
|---|
| 27 | typedef optional<T> O; |
|---|
| 28 | |
|---|
| 29 | constexpr O o1; // disengaged |
|---|
| 30 | constexpr O o2{1}; // engaged |
|---|
| 31 | |
|---|
| 32 | static_assert ( !(nullopt != o1), "" ); |
|---|
| 33 | static_assert ( (nullopt != o2), "" ); |
|---|
| 34 | static_assert ( !(o1 != nullopt), "" ); |
|---|
| 35 | static_assert ( (o2 != nullopt), "" ); |
|---|
| 36 | |
|---|
| 37 | static_assert (noexcept(nullopt != o1), "" ); |
|---|
| 38 | static_assert (noexcept(o1 != nullopt), "" ); |
|---|
| 39 | } |
|---|
| 40 | |
|---|
| 41 | return 0; |
|---|
| 42 | } |
|---|
| 43 | |
|---|
