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