types.h

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/****************************************************************************
 *
 * fkie_message_filters
 * Copyright © 2018-2020 Fraunhofer FKIE
 * Author: Timo Röhling
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ****************************************************************************/
#ifndef INCLUDE_FKIE_MESSAGE_FILTERS_TYPES_H_
#define INCLUDE_FKIE_MESSAGE_FILTERS_TYPES_H_

#include <boost/signals2/connection.hpp>
#include <tuple>
#include "helpers/io.h"

namespace fkie_message_filters
{

using Connection = boost::signals2::connection;

template<typename... Types>
class IO
{
public:
    using Tuple = std::tuple<helpers::io_unwrap_t<Types>...>;
    template<std::size_t N>
    using Type = typename std::tuple_element<N, std::tuple<helpers::io_unwrap_t<Types>...>>::type;
    template<std::size_t... Is>
    using Select = IO<typename std::tuple_element<Is, std::tuple<helpers::io_unwrap_t<Types>...>>::type...>;
    template<template<typename...> class Outer>
    using Rewrap = Outer<helpers::io_unwrap_t<Types>...>;
};

} // namespace fkie_message_filters

#endif /* INCLUDE_FKIE_MESSAGE_FILTERS_TYPES_H_ */