| // Tests that we wouldn't generate an allocation call in promise_type with (std::size_t, std::nothrow_t) in case we find promsie_type::get_return_object_on_allocation_failure; |
| // RUN: %clang_cc1 %s -std=c++20 %s -fsyntax-only -verify |
| |
| namespace std { |
| template <typename... T> |
| struct coroutine_traits; |
| |
| template <class Promise = void> |
| struct coroutine_handle { |
| coroutine_handle() = default; |
| static coroutine_handle from_address(void *) noexcept { return {}; } |
| }; |
| |
| template <> |
| struct coroutine_handle<void> { |
| static coroutine_handle from_address(void *) { return {}; } |
| coroutine_handle() = default; |
| template <class PromiseType> |
| coroutine_handle(coroutine_handle<PromiseType>) noexcept {} |
| }; |
| |
| struct suspend_always { |
| bool await_ready() noexcept { return false; } |
| void await_suspend(std::coroutine_handle<>) noexcept {} |
| void await_resume() noexcept {} |
| }; |
| |
| struct nothrow_t {}; |
| constexpr nothrow_t nothrow = {}; |
| |
| } // end namespace std |
| |
| using SizeT = decltype(sizeof(int)); |
| |
| struct promise_on_alloc_failure_tag {}; |
| |
| template <> |
| struct std::coroutine_traits<int, promise_on_alloc_failure_tag> { |
| struct promise_type { |
| int get_return_object() { return 0; } |
| std::suspend_always initial_suspend() { return {}; } |
| std::suspend_always final_suspend() noexcept { return {}; } |
| void return_void() {} |
| void unhandled_exception() {} |
| static int get_return_object_on_allocation_failure() { return -1; } |
| void *operator new(SizeT, std::nothrow_t) noexcept; |
| }; |
| }; |
| |
| extern "C" int f(promise_on_alloc_failure_tag) { // expected-error 1+{{is not usable with the function signature of 'f'}} |
| co_return; |
| } |