xorp

visitor.hh

00001 // -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-
00002 // vim:set sts=4 ts=8:
00003 
00004 // Copyright (c) 2001-2011 XORP, Inc and Others
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/visitor.hh,v 1.12 2008/10/02 21:58:01 bms Exp $
00022 
00023 #ifndef __POLICY_VISITOR_HH__
00024 #define __POLICY_VISITOR_HH__
00025 
00026 
00027 
00028 #include "policy/common/element_base.hh"
00029 
00030 template<class T> class NodeAny;
00031 typedef NodeAny<string> NodeVar;
00032 
00033 class NodeElem;
00034 class NodeBin;
00035 class NodeUn;
00036 class NodeSet;
00037 class NodeAssign;
00038 class NodeAccept;
00039 class NodeReject;
00040 class NodeProto;
00041 class Term;
00042 class PolicyStatement;
00043 class NodeNext;
00044 class NodeSubr;
00045 
00051 class Visitor {
00052 public:
00053     virtual ~Visitor() {}
00054 
00055     virtual const Element* visit(NodeUn&) = 0;
00056     virtual const Element* visit(NodeBin&) = 0;
00057     virtual const Element* visit(NodeVar&) = 0;
00058     virtual const Element* visit(NodeAssign&) = 0;
00059     virtual const Element* visit(NodeSet&) = 0;
00060     virtual const Element* visit(NodeAccept&) = 0;
00061     virtual const Element* visit(NodeReject&) = 0;
00062     virtual const Element* visit(Term&) = 0;
00063     virtual const Element* visit(PolicyStatement&) = 0;
00064     virtual const Element* visit(NodeElem&) = 0;
00065     virtual const Element* visit(NodeProto&) = 0;
00066     virtual const Element* visit(NodeNext&) = 0;
00067     virtual const Element* visit(NodeSubr&) = 0;
00068 };
00069 
00070 #endif // __POLICY_VISITOR_HH__
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