45 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8//9// UNSUPPORTED: no-exceptions10// UNSUPPORTED: no-threads11// UNSUPPORTED: c++0312 13// <future>14 15// class promise<R>16 17// void promise<void>::set_value();18 19#include <future>20#include <cassert>21 22#include "test_macros.h"23 24int main(int, char**)25{26 {27 typedef void T;28 std::promise<T> p;29 std::future<T> f = p.get_future();30 p.set_value();31 f.get();32 try33 {34 p.set_value();35 assert(false);36 }37 catch (const std::future_error& e)38 {39 assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied));40 }41 }42 43 return 0;44}45