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// 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;
}
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