chain_element.h

/*********************************************************************************************************************************************/
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/*  Copyright (c) SILVERCODERS Ltd, http://silvercoders.com                                                                                  */
/*  Project homepage: https://github.com/docwire/docwire                                                                                     */
/*                                                                                                                                           */
/*  SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-DocWire-Commercial                                                                  */
/*********************************************************************************************************************************************/
 
#ifndef DOCWIRE_CHAIN_ELEMENT_H
#define DOCWIRE_CHAIN_ELEMENT_H
 
#include "core_export.h"
#include "pimpl.h"
#include "message.h"
 
namespace docwire
{
 
class parsing_chain;
 
class DOCWIRE_CORE_EXPORT chain_element : public with_pimpl<chain_element>
{
public:
  chain_element();
  chain_element(chain_element&&) = default;
  virtual ~chain_element() = default;
  chain_element& operator=(chain_element&&) = default;
 
  virtual continuation operator()(message_ptr msg, const message_callbacks& emit_message) = 0;
 
  virtual bool is_leaf() const = 0;
 
  virtual bool is_generator() const { return false; }
};
 
}
#endif //DOCWIRE_CHAIN_ELEMENT_H