1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // The LLVM Compiler Infrastructure 5 // 6 // This file is dual licensed under the MIT and the University of Illinois Open 7 // Source Licenses. See LICENSE.TXT for details. 8 // 9 //===----------------------------------------------------------------------===// 10 11 // UNSUPPORTED: c++98, c++03, c++11 12 13 // <experimental/coroutine> 14 15 // template <class Promise> 16 // struct coroutine_handle<Promise>; 17 18 // Promise& promise() const 19 20 #include <experimental/coroutine> 21 #include <type_traits> 22 #include <memory> 23 #include <utility> 24 #include <cstdint> 25 #include <cassert> 26 27 #include "test_macros.h" 28 29 namespace coro = std::experimental; 30 31 struct MyCoro { 32 struct promise_type { 33 void unhandled_exception() {} 34 void return_void() {} 35 coro::suspend_never initial_suspend() { return {}; } 36 coro::suspend_never final_suspend() { return {}; } 37 MyCoro get_return_object() { 38 do_runtime_test(); 39 return {}; 40 } 41 void do_runtime_test() { 42 // Test that a coroutine_handle<const T> can be created from a const 43 // promise_type and that it represents the same coroutine as 44 // coroutine_handle<T> 45 using CH = coro::coroutine_handle<promise_type>; 46 using CCH = coro::coroutine_handle<const promise_type>; 47 const auto &cthis = *this; 48 CH h = CH::from_promise(*this); 49 CCH h2 = CCH::from_promise(*this); 50 CCH h3 = CCH::from_promise(cthis); 51 assert(&h.promise() == this); 52 assert(&h2.promise() == this); 53 assert(&h3.promise() == this); 54 assert(h.address() == h2.address()); 55 assert(h2.address() == h3.address()); 56 } 57 }; 58 }; 59 60 MyCoro do_runtime_test() { 61 co_await coro::suspend_never{}; 62 } 63 64 template <class Promise> 65 void do_test(coro::coroutine_handle<Promise>&& H) { 66 67 // FIXME Add a runtime test 68 { 69 ASSERT_SAME_TYPE(decltype(H.promise()), Promise&); 70 LIBCPP_ASSERT_NOT_NOEXCEPT(H.promise()); 71 } 72 { 73 auto const& CH = H; 74 ASSERT_SAME_TYPE(decltype(CH.promise()), Promise&); 75 LIBCPP_ASSERT_NOT_NOEXCEPT(CH.promise()); 76 } 77 } 78 79 int main() 80 { 81 do_test(coro::coroutine_handle<int>{}); 82 do_test(coro::coroutine_handle<const int>{}); 83 do_runtime_test(); 84 } 85
