| //===----------------------------------------------------------------------===// |
| // 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++98, c++03, c++11, c++14 |
| // struct nullopt_t{see below}; |
| // inline constexpr nullopt_t nullopt(unspecified); |
| // Type nullopt_t shall not have a default constructor or an initializer-list |
| // constructor, and shall not be an aggregate. |
| static_assert(std::is_empty_v<nullopt_t>); |
| static_assert(!std::is_default_constructible_v<nullopt_t>); |
| static_assert(std::is_same_v<const nullopt_t, decltype(nullopt)>); |