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 // UNSUPPORTED: libcpp-has-no-threads 11 12 // <future> 13 14 // class packaged_task<R(ArgTypes...)> 15 16 // packaged_task& operator=(packaged_task&& other); 17 18 #include <future> 19 #include <cassert> 20 21 class A 22 { 23 long data_; 24 25 public: 26 explicit A(long i) : data_(i) {} 27 28 long operator()(long i, long j) const {return data_ + i + j;} 29 }; 30 31 int main() 32 { 33 { 34 std::packaged_task<double(int, char)> p0(A(5)); 35 std::packaged_task<double(int, char)> p; 36 p = std::move(p0); 37 assert(!p0.valid()); 38 assert(p.valid()); 39 std::future<double> f = p.get_future(); 40 p(3, 'a'); 41 assert(f.get() == 105.0); 42 } 43 { 44 std::packaged_task<double(int, char)> p0; 45 std::packaged_task<double(int, char)> p; 46 p = std::move(p0); 47 assert(!p0.valid()); 48 assert(!p.valid()); 49 } 50 } 51
