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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2011 University of California, Los Angeles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
*/
#ifndef _CCNB_PARSER_NON_NEGATIVE_INTEGER_VISITOR_H_
#define _CCNB_PARSER_NON_NEGATIVE_INTEGER_VISITOR_H_
#include "no-argu-depth-first-visitor.h"
NDN_NAMESPACE_BEGIN
namespace wire {
namespace CcnbParser {
/**
* \ingroup ccnx-ccnb
* \brief Visitor to obtain non-negative integer value from UDATA block
*
* Will return empty boost::any() if called on anything except UDATA block
*/
class NonNegativeIntegerVisitor : public NoArguDepthFirstVisitor
{
public:
virtual boost::any visit (Blob &n); ///< Throws an exception if BLOB object is encountered
virtual boost::any visit (Udata &n);
};
} // CcnbParser
} // wire
NDN_NAMESPACE_END
#endif // _CCNB_PARSER_NON_NEGATIVE_INTEGER_VISITOR_H_