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