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 21 int 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
