library/cpp/yson_pull/bridge.h


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#pragma once

#include "consumer.h"
#include "event.h"
#include "writer.h"

namespace NYsonPull {
    //! \brief Connect YSON stream producer and consumer. 
    //! 
    //! Useful for writing YSON stream filters. 
    //! \p Producer must have a \p next_event() method (like \p NYsonPull::reader). 
    //! \p Consumer must be like \p NYsonPull::consumer interface. 
    template <typename Producer, typename Consumer> 
    inline void Bridge(Producer&& producer, Consumer&& consumer) {
        for (;;) { 
            auto& event = producer.NextEvent();
            consumer.OnEvent(event);
            if (event.Type() == EEventType::EndStream) {
                break; 
            } 
        }
    }

    template <typename Producer> 
    inline void Bridge(Producer&& producer, TWriter& writer_) {
        Bridge(std::forward<Producer>(producer), writer_.GetConsumer());
    } 

    template <typename Producer> 
    inline void Bridge(Producer&& producer, TWriter&& writer_) {
        Bridge(std::forward<Producer>(producer), writer_.GetConsumer());
    } 

}