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: no-threads 10 // UNSUPPORTED: c++03, c++11, c++14, c++17 11 12 // struct nostopstate_t { 13 // explicit nostopstate_t() = default; 14 // }; 15 // 16 // inline constexpr nostopstate_t nostopstate{}; 17 18 #include <concepts> 19 #include <stop_token> 20 #include <type_traits> 21 22 #include "test_macros.h" 23 24 static_assert(std::is_trivially_default_constructible_v<std::nostopstate_t>); 25 26 struct Empty {}; 27 static_assert(sizeof(Empty) == sizeof(std::nostopstate_t)); 28 29 template <class T> 30 void conversionTest(T); 31 32 template <class T> 33 concept ImplicitlyDefaultConstructible = requires { conversionTest<T>({}); }; 34 static_assert(!ImplicitlyDefaultConstructible<std::nostopstate_t>); 35 36 int main(int, char**) { 37 [[maybe_unused]] std::same_as<std::nostopstate_t> auto x = std::nostopstate; 38 [[maybe_unused]] auto y = std::nostopstate_t{}; 39 40 return 0; 41 } 42