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()); 
    }
 
}