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 // UNSUPPORTED: c++98, c++03 12 13 // <future> 14 15 // class shared_future<R> 16 17 // shared_future& operator=(const shared_future& rhs); 18 // noexcept in C++17 19 20 #include <future> 21 #include <cassert> 22 23 #include "test_macros.h" 24 25 int main() 26 { 27 { 28 typedef int T; 29 std::promise<T> p; 30 std::shared_future<T> f0 = p.get_future(); 31 std::shared_future<T> f; 32 f = f0; 33 #if TEST_STD_VER > 14 34 static_assert(noexcept(f = f0), "" ); 35 #endif 36 assert(f0.valid()); 37 assert(f.valid()); 38 } 39 { 40 typedef int T; 41 std::shared_future<T> f0; 42 std::shared_future<T> f; 43 f = f0; 44 assert(!f0.valid()); 45 assert(!f.valid()); 46 } 47 { 48 typedef int& T; 49 std::promise<T> p; 50 std::shared_future<T> f0 = p.get_future(); 51 std::shared_future<T> f; 52 f = f0; 53 assert(f0.valid()); 54 assert(f.valid()); 55 } 56 { 57 typedef int& T; 58 std::shared_future<T> f0; 59 std::shared_future<T> f; 60 f = f0; 61 assert(!f0.valid()); 62 assert(!f.valid()); 63 } 64 { 65 typedef void T; 66 std::promise<T> p; 67 std::shared_future<T> f0 = p.get_future(); 68 std::shared_future<T> f; 69 f = f0; 70 assert(f0.valid()); 71 assert(f.valid()); 72 } 73 { 74 typedef void T; 75 std::shared_future<T> f0; 76 std::shared_future<T> f; 77 f = f0; 78 assert(!f0.valid()); 79 assert(!f.valid()); 80 } 81 } 82
