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