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// UNSUPPORTED: c++98, c++03 12 13// <future> 14 15// class promise<R> 16 17// promise(); 18 19#include <future> 20#include <cassert> 21 22int main() 23{ 24 { 25 std::promise<int> p; 26 std::future<int> f = p.get_future(); 27 assert(f.valid()); 28 } 29 { 30 std::promise<int&> p; 31 std::future<int&> f = p.get_future(); 32 assert(f.valid()); 33 } 34 { 35 std::promise<void> p; 36 std::future<void> f = p.get_future(); 37 assert(f.valid()); 38 } 39} 40