62 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-threads10// UNSUPPORTED: c++0311 12// <future>13 14// class promise<R>15 16// future<R> get_future();17 18#include <future>19#include <cassert>20 21#include "test_macros.h"22 23int main(int, char**)24{25 {26 std::promise<double> p;27 std::future<double> f = p.get_future();28 p.set_value(105.5);29 assert(f.get() == 105.5);30 }31#ifndef TEST_HAS_NO_EXCEPTIONS32 {33 std::promise<double> p;34 std::future<double> f = p.get_future();35 try36 {37 f = p.get_future();38 assert(false);39 }40 catch (const std::future_error& e)41 {42 assert(e.code() == make_error_code(std::future_errc::future_already_retrieved));43 }44 }45 {46 std::promise<double> p;47 std::promise<double> p0 = std::move(p);48 try49 {50 std::future<double> f = p.get_future();51 assert(false);52 }53 catch (const std::future_error& e)54 {55 assert(e.code() == make_error_code(std::future_errc::no_state));56 }57 }58#endif59 60 return 0;61}62