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& operator=(const shared_future& rhs); 17 18 #include <future> 19 #include <cassert> 20 21 int main() 22 { 23 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 24 { 25 typedef int T; 26 std::promise<T> p; 27 std::shared_future<T> f0 = p.get_future(); 28 std::shared_future<T> f; 29 f = f0; 30 assert(f0.valid()); 31 assert(f.valid()); 32 } 33 { 34 typedef int T; 35 std::shared_future<T> f0; 36 std::shared_future<T> f; 37 f = f0; 38 assert(!f0.valid()); 39 assert(!f.valid()); 40 } 41 { 42 typedef int& T; 43 std::promise<T> p; 44 std::shared_future<T> f0 = p.get_future(); 45 std::shared_future<T> f; 46 f = f0; 47 assert(f0.valid()); 48 assert(f.valid()); 49 } 50 { 51 typedef int& T; 52 std::shared_future<T> f0; 53 std::shared_future<T> f; 54 f = f0; 55 assert(!f0.valid()); 56 assert(!f.valid()); 57 } 58 { 59 typedef void T; 60 std::promise<T> p; 61 std::shared_future<T> f0 = p.get_future(); 62 std::shared_future<T> f; 63 f = f0; 64 assert(f0.valid()); 65 assert(f.valid()); 66 } 67 { 68 typedef void T; 69 std::shared_future<T> f0; 70 std::shared_future<T> f; 71 f = f0; 72 assert(!f0.valid()); 73 assert(!f.valid()); 74 } 75 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 76 } 77
