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(); 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 29void func(std::packaged_task<double(int, char)> p) 30{ 31} 32 33void func2(std::packaged_task<double(int, char)> p) 34{ 35 p(3, 'a'); 36} 37 38int main() 39{ 40 { 41 std::packaged_task<double(int, char)> p(A(5)); 42 std::future<double> f = p.get_future(); 43 std::thread(func, std::move(p)).detach(); 44 try 45 { 46 double i = f.get(); 47 assert(false); 48 } 49 catch (const std::future_error& e) 50 { 51 assert(e.code() == make_error_code(std::future_errc::broken_promise)); 52 } 53 } 54 { 55 std::packaged_task<double(int, char)> p(A(5)); 56 std::future<double> f = p.get_future(); 57 std::thread(func2, std::move(p)).detach(); 58 assert(f.get() == 105.0); 59 } 60} 61