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// { dg-additional-options "-fsyntax-only" }
namespace std {
template <class T, class = void>
struct traits_sfinae_base {};
template <class Ret, class... Args>
struct coroutine_traits : public traits_sfinae_base<Ret> {};
}
template<typename Promise> struct coro {};
template <typename Promise, typename... Ps>
struct std::coroutine_traits<coro<Promise>, Ps...> {
using promise_type = Promise;
};
struct awaitable {
bool await_ready() noexcept;
template <typename F>
void await_suspend(F) noexcept;
void await_resume() noexcept;
} a;
struct suspend_always {
bool await_ready() noexcept { return false; }
template <typename F>
void await_suspend(F) noexcept;
void await_resume() noexcept {}
};
namespace std {
template <class PromiseType = void>
struct coroutine_handle {};
}
struct bad_promise_6 {
coro<bad_promise_6> get_return_object();
suspend_always initial_suspend();
suspend_always final_suspend() noexcept;
void unhandled_exception();
void return_void();
void return_value(int) const;
void return_value(int);
};
coro<bad_promise_6>
bad_implicit_return() // { dg-error {.aka 'bad_promise_6'. declares both 'return_value' and 'return_void'} }
{
co_await a;
}
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