coroutine_traits.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2021 Tobias Hienzsch
 
#ifndef TETL_COROUTINE_COROUTINE_TRAITS_HPP
#define TETL_COROUTINE_COROUTINE_TRAITS_HPP
 
#include <etl/_type_traits/void_t.hpp>
 
#if defined(__cpp_coroutines)
 
namespace etl {
 
namespace detail {
template <typename R, typename = void>
struct coro_traits { };
 
template <typename R>
struct coro_traits<R, void_t<typename R::promise_type>> {
    using promise_type = typename R::promise_type;
};
} // namespace detail
 
/// \ingroup coroutine
template <typename R, typename... Args>
struct coroutine_traits : detail::coro_traits<R> { };
 
} // namespace etl
 
#endif // defined(__cpp_coroutines)
 
#endif // TETL_COROUTINE_COROUTINE_TRAITS_HPP