Line data    Source code

       1             : /**
       2             : * @file      BItemVisitor.h
       3             : * @copyright (c) 2014 by Petr Zemek (s3rvac@gmail.com) and contributors
       4             : * @license   BSD, see the @c LICENSE file for more details
       5             : * @brief     Base class for all visitors of the BItem subclasses.
       6             : */
       7             : 
       8             : #ifndef BENCODING_BITEMVISITOR_H
       9             : #define BENCODING_BITEMVISITOR_H
      10             : 
      11             : namespace bencoding {
      12             : 
      13             : class BDictionary;
      14             : class BInteger;
      15             : class BList;
      16             : class BString;
      17             : 
      18             : /**
      19             : * @brief Base class for all visitors of the BItem subclasses.
      20             : *
      21             : * Implements the <a
      22             : * href="http://en.wikipedia.org/wiki/Visitor_design_pattern">Visitor design
      23             : * pattern</a>.
      24             : */
      25          50 : class BItemVisitor {
      26             : public:
      27             :     virtual ~BItemVisitor();
      28             : 
      29             :     virtual void visit(BDictionary *bDictionary) = 0;
      30             :     virtual void visit(BInteger *bInteger) = 0;
      31             :     virtual void visit(BList *blist) = 0;
      32             :     virtual void visit(BString *bString) = 0;
      33             : 
      34             : protected:
      35             :     BItemVisitor();
      36             : };
      37             : 
      38             : } // namespace bencoding
      39             : 
      40             : #endif