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 // struct nullopt_t{see below};
13 // inline constexpr nullopt_t nullopt(unspecified);
14 
15 // [optional.nullopt]/2:
16 //   Type nullopt_t shall not have a default constructor or an initializer-list
17 //   constructor, and shall not be an aggregate.
18 
19 #include <optional>
20 
21 int main(int, char**)
22 {
23     std::nullopt_t n = {};
24 
25   return 0;
26 }
27