xorp

elem_null.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/common/elem_null.hh,v 1.10 2008/10/02 21:58:06 bms Exp $
00022 
00023 #ifndef __POLICY_COMMON_ELEM_NULL_HH__
00024 #define __POLICY_COMMON_ELEM_NULL_HH__
00025 
00026 #include "element_base.hh"
00027 
00028 
00039 class ElemNull : public Element {
00040 public:
00041     static const char* id;
00042     static Hash _hash;
00043             
00044     ElemNull() : Element(_hash) {}
00045     ElemNull(const char* /* c_str */) : Element(_hash) {}
00046                 
00047     string str() const { return "null"; }
00048 
00049     const char* type() const { return id; }
00050 };
00051 
00052 #endif // __POLICY_COMMON_ELEM_NULL_HH__
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