filter_impl.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_FILTER_IMPL_H_
#define INCLUDE_FKIE_MESSAGE_FILTERS_FILTER_IMPL_H_
 
#include "filter.h"
 
namespace fkie_message_filters
{
 
template<class In, class Out>
void Filter<In, Out>::disconnect() noexcept
{
    this->disconnect_from_all_sources();
    this->disconnect_from_all_sinks();
}
 
namespace helpers
{
 
template<typename Filter>
void chain_impl(Filter& flt) noexcept
{
}
 
template<typename Filter1, typename Filter2, typename... MoreFilters>
void chain_impl(Filter1& flt1, Filter2& flt2, MoreFilters&... filters) noexcept
{
    chain_impl(flt2, filters...);
    flt1.connect_to_sink(flt2);
}
 
} // namespace helpers
 
template<typename Filter1, typename Filter2, typename... MoreFilters>
void chain(Filter1& flt1, Filter2& flt2, MoreFilters&... filters) noexcept
{
    helpers::chain_impl(flt1, flt2, filters...);
}
 
} // namespace fkie_message_filters
 
#endif /* INCLUDE_FKIE_MESSAGE_FILTERS_FILTER_IMPL_H_ */