default_symbol.h

由matlab开发的hybrid系统的描述语言

/*
	HYSDEL
	Copyright (C) 1999-2002  Fabio D. Torrisi

	This file is part of HYSDEL.
    
	HYSDEL is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public
	License as published by the Free Software Foundation; either
	version 2 of the License, or (at your option) any later version.

	HYSDEL 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 library; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

	CONTACT INFORMATION
	===================
	Fabio D. Torrisi
	ETH Zentrum
	Physikstrasse. 3 ETL,
	CH-8032 Zurich
	Switzerland
	mailto:[e-mail] (preferred)
*/

#ifndef D_DEFAULT_SYMBOL
#define D_DEFAULT_SYMBOL
#ifndef STD_NS
#define STD_NS
using namespace std;
#endif
#include "Param_symbol.h"


/** symbols which are at startup added to the symbol table,
 * such as pi, MLD_epsilon. Unlike other symbols, these can be
 * declared multiple times */
class Default_symbol : public Param_symbol {
public:

	Default_symbol(Symb_type i_type, string i_name, const Globals * glob);

	bool is_default_symbol() const { return true; }

	/** true iff symbol is neither redeclared or used */
	bool is_virginal() const;

	bool is_required_mme() const;
};


#endif //D_DEFAULT_SYMBOL