1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <future> 11 12// class packaged_task<R(ArgTypes...)> 13 14// packaged_task& operator=(packaged_task&& other); 15 16#include <future> 17#include <cassert> 18 19class A 20{ 21 long data_; 22 23public: 24 explicit A(long i) : data_(i) {} 25 26 long operator()(long i, long j) const {return data_ + i + j;} 27}; 28 29int main() 30{ 31 { 32 std::packaged_task<double(int, char)> p0(A(5)); 33 std::packaged_task<double(int, char)> p; 34 p = std::move(p0); 35 assert(!p0.valid()); 36 assert(p.valid()); 37 std::future<double> f = p.get_future(); 38 p(3, 'a'); 39 assert(f.get() == 105.0); 40 } 41 { 42 std::packaged_task<double(int, char)> p0; 43 std::packaged_task<double(int, char)> p; 44 p = std::move(p0); 45 assert(!p0.valid()); 46 assert(!p.valid()); 47 } 48} 49