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 future<R> 13 14// future(); 15 16#include <future> 17#include <cassert> 18 19int main() 20{ 21 { 22 std::future<int> f; 23 assert(!f.valid()); 24 } 25 { 26 std::future<int&> f; 27 assert(!f.valid()); 28 } 29 { 30 std::future<void> f; 31 assert(!f.valid()); 32 } 33} 34