xorp

instruction_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/backend/instruction_base.hh,v 1.8 2008/10/02 21:58:03 bms Exp $
00022 
00023 #ifndef __POLICY_BACKEND_INSTRUCTION_BASE_HH__
00024 #define __POLICY_BACKEND_INSTRUCTION_BASE_HH__
00025 
00026 #include "instr_visitor.hh"
00027 
00034 class Instruction {
00035 public:
00036     virtual ~Instruction() {}
00037 
00043     virtual void accept(InstrVisitor& v) = 0;
00044 };
00045 
00046 // macro ugliness to make instruction visitable [usable by visitor].
00047 #define INSTR_VISITABLE() \
00048 void accept(InstrVisitor& v) { \
00049     v.visit(*this); \
00050 }
00051 
00052 #endif // __POLICY_BACKEND_INSTRUCTION_BASE_HH__
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