| //===----------------------------------------------------------------------===// |
| // |
| // 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++03, c++11, c++14, c++17 |
| // UNSUPPORTED: libcpp-no-coroutines |
| |
| // <coroutine> |
| |
| // template <class Promise = void> |
| // struct coroutine_handle; |
| |
| // constexpr explicit operator bool() const noexcept |
| |
| #include <coroutine> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| template <class C> |
| constexpr bool do_test() { |
| static_assert(std::is_nothrow_constructible<bool, C>::value, ""); |
| static_assert(!std::is_convertible<C, bool>::value, ""); |
| { |
| constexpr C c; |
| static_assert(bool(c) == false, ""); |
| } |
| { // null case |
| const C c = {}; |
| ASSERT_NOEXCEPT(bool(c)); |
| assert(c.address() == nullptr); |
| assert(bool(c) == false); |
| } |
| { // non-null case |
| char dummy = 42; |
| C c = C::from_address((void*)&dummy); |
| assert(c.address() == &dummy); |
| assert(bool(c) == true); |
| } |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| do_test<std::coroutine_handle<>>(); |
| do_test<std::coroutine_handle<int>>(); |
| static_assert(do_test<std::coroutine_handle<>>()); |
| static_assert(do_test<std::coroutine_handle<int>>()); |
| |
| return 0; |
| } |