xorp

node_base.hh

00001 // -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-
00002 // vim:set sts=4 ts=8:
00003 
00004 // Copyright (c) 2001-2009 XORP, Inc.
00005 //
00006 // This program is free software; you can redistribute it and/or modify
00007 // it under the terms of the GNU General Public License, Version 2, June
00008 // 1991 as published by the Free Software Foundation. Redistribution
00009 // and/or modification of this program under the terms of any other
00010 // version of the GNU General Public License is not permitted.
00011 // 
00012 // This program is distributed in the hope that it will be useful, but
00013 // WITHOUT ANY WARRANTY; without even the implied warranty of
00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For more details,
00015 // see the GNU General Public License, Version 2, a copy of which can be
00016 // found in the XORP LICENSE.gpl file.
00017 // 
00018 // XORP Inc, 2953 Bunker Hill Lane, Suite 204, Santa Clara, CA 95054, USA;
00019 // http://xorp.net
00020 
00021 // $XORP: xorp/policy/node_base.hh,v 1.10 2008/10/02 21:57:58 bms Exp $
00022 
00023 #ifndef __POLICY_NODE_BASE_HH__
00024 #define __POLICY_NODE_BASE_HH__
00025 
00026 #include "visitor.hh"
00027 
00036 class Node {
00037 public:
00041     Node(unsigned line) : _line(line) {}
00042     virtual ~Node() {}
00043 
00047     unsigned line() const { return _line; }
00048 
00055     virtual const Element* accept(Visitor& v) =0;
00056 
00062     virtual bool is_protocol_statement() const { return (false); }
00063 
00069     virtual bool is_accept_or_reject() const { return (false); }
00070 
00071 private:
00072     unsigned _line;
00073 };
00074 
00075 // macro ugliness for visitor implemntation.
00076 #define DEFINE_VISITABLE() \
00077 const Element* accept(Visitor& visitor) { \
00078     return visitor.visit(*this); \
00079 }
00080 
00081 #endif // __POLICY_NODE_BASE_HH__
 All Classes Namespaces Functions Variables Typedefs Enumerations