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// RUN: %clang_cc1 -triple x86_64-apple-darwin9 %s -std=c++20 -fsyntax-only -Wignored-qualifiers -Wno-error=return-type -verify -fblocks -Wno-unreachable-code -Wno-unused-value
#ifndef STD_COROUTINE_H
#define STD_COROUTINE_H
namespace std {
template<typename T> struct remove_reference { typedef T type; };
template<typename T> struct remove_reference<T &> { typedef T type; };
template<typename T> struct remove_reference<T &&> { typedef T type; };
template<typename T>
typename remove_reference<T>::type &&move(T &&t) noexcept;
struct input_iterator_tag {};
struct forward_iterator_tag : public input_iterator_tag {};
template <class Ret, typename... T>
struct coroutine_traits { using promise_type = typename Ret::promise_type; };
template <class Promise = void>
struct coroutine_handle {
static coroutine_handle from_address(void *) noexcept;
static coroutine_handle from_promise(Promise &promise);
constexpr void* address() const noexcept;
};
template <>
struct coroutine_handle<void> {
template <class PromiseType>
coroutine_handle(coroutine_handle<PromiseType>) noexcept;
static coroutine_handle from_address(void *);
constexpr void* address() const noexcept;
};
struct suspend_always {
bool await_ready() noexcept { return false; }
void await_suspend(coroutine_handle<>) noexcept {}
void await_resume() noexcept {}
};
struct suspend_never {
bool await_ready() noexcept { return true; }
void await_suspend(coroutine_handle<>) noexcept {}
void await_resume() noexcept {}
};
} // namespace std
#endif // STD_COROUTINE_H
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