53 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 packaged_task<R(ArgTypes...)>15 16// packaged_task(packaged_task&& other);17 18#include <future>19#include <cassert>20 21#include "test_macros.h"22 23class A24{25 long data_;26 27public:28 explicit A(long i) : data_(i) {}29 30 long operator()(long i, long j) const {return data_ + i + j;}31};32 33int main(int, char**)34{35 {36 std::packaged_task<double(int, char)> p0(A(5));37 std::packaged_task<double(int, char)> p = std::move(p0);38 assert(!p0.valid());39 assert(p.valid());40 std::future<double> f = p.get_future();41 p(3, 97);42 assert(f.get() == 105.0);43 }44 {45 std::packaged_task<double(int, char)> p0;46 std::packaged_task<double(int, char)> p = std::move(p0);47 assert(!p0.valid());48 assert(!p.valid());49 }50 51 return 0;52}53