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/******************************************************************************
* ____ _ _____ *
* / ___| / \ | ___| C++ *
* | | / _ \ | |_ Actor *
* | |___ / ___ \| _| Framework *
* \____/_/ \_|_| *
* *
* Copyright 2011-2018 Dominik Charousset *
* *
* Distributed under the terms and conditions of the BSD 3-Clause License or *
* (at your option) under the terms and conditions of the Boost Software *
* License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE. *
* *
* If you did not receive a copy of the license files, see *
* http://opensource.org/licenses/BSD-3-Clause and *
* http://www.boost.org/LICENSE_1_0.txt. *
******************************************************************************/
#pragma once
#include <type_traits>
namespace caf {
namespace meta {
/// Type tag for all meta annotations in CAF.
struct annotation {
constexpr annotation() {
// nop
}
};
template <class T>
struct is_annotation {
static constexpr bool value = std::is_base_of<annotation, T>::value;
};
template <class T>
struct is_annotation<T&> : is_annotation<T> {};
template <class T>
struct is_annotation<const T&> : is_annotation<T> {};
template <class T>
struct is_annotation<T&&> : is_annotation<T> {};
} // namespace meta
} // namespace caf
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