| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++98, c++03, c++11 |
| |
| // <experimental/coroutine> |
| |
| // template <class Promise = void> |
| // struct coroutine_handle; |
| |
| // coroutine_handle& operator=(nullptr_t) noexcept |
| |
| #include <experimental/coroutine> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| namespace coro = std::experimental; |
| |
| template <class C> |
| void do_test() { |
| int dummy = 42; |
| void* dummy_h = &dummy; |
| { |
| C c; ((void)c); |
| static_assert(std::is_nothrow_assignable<C&, std::nullptr_t>::value, ""); |
| static_assert(!std::is_assignable<C&, void*>::value, ""); |
| } |
| { |
| C c = C::from_address(dummy_h); |
| assert(c.address() == &dummy); |
| c = nullptr; |
| assert(c.address() == nullptr); |
| c = nullptr; |
| assert(c.address() == nullptr); |
| } |
| { |
| C c; |
| C& cr = (c = nullptr); |
| assert(&c == &cr); |
| } |
| } |
| |
| int main(int, char**) |
| { |
| do_test<coro::coroutine_handle<>>(); |
| do_test<coro::coroutine_handle<int>>(); |
| |
| return 0; |
| } |