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// RUN: %clang_cc1 -triple x86_64-apple-darwin9 %s -stdlib=libc++ -std=c++1z -fcoroutines-ts -fsyntax-only
namespace std::experimental {
template <class Promise = void> struct coroutine_handle {
coroutine_handle() = default;
static coroutine_handle from_address(void *) noexcept;
};
template <> struct coroutine_handle<void> {
static coroutine_handle from_address(void *) noexcept;
coroutine_handle() = default;
template <class PromiseType>
coroutine_handle(coroutine_handle<PromiseType>) noexcept;
};
template <class... Args>
struct void_t_imp {
using type = void;
};
template <class... Args>
using void_t = typename void_t_imp<Args...>::type;
template <class T, class = void>
struct traits_sfinae_base {};
template <class T>
struct traits_sfinae_base<T, void_t<typename T::promise_type>> {
using promise_type = typename T::promise_type;
};
template <class Ret, class... Args>
struct coroutine_traits : public traits_sfinae_base<Ret> {};
}
struct suspend_never {
bool await_ready() noexcept;
void await_suspend(std::experimental::coroutine_handle<>) noexcept;
void await_resume() noexcept;
};
struct MoveOnly {
MoveOnly() {};
MoveOnly(const MoveOnly&) = delete;
MoveOnly(MoveOnly&&) noexcept {};
~MoveOnly() {};
};
template <typename T>
struct task {
struct promise_type {
auto initial_suspend() { return suspend_never{}; }
auto final_suspend() noexcept { return suspend_never{}; }
auto get_return_object() { return task{}; }
static void unhandled_exception() {}
void return_value(T&& value) {}
};
};
task<MoveOnly> f() {
MoveOnly value;
co_return value;
}
int main() {
f();
return 0;
}
// expected-no-diagnostics
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