parameter_expr.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_PARAMETER_EXPR
#define D_PARAMETER_EXPR
#include "Terminal_expr.h"
#ifndef STD_NS
#define STD_NS
using namespace std;
#endif

class Param_symbol;
class Symbol;
class Affine_func;
class Cmd_options;

/** A parameter. Its value may or may not be given at compile time. */
class Parameter_expr : public Terminal_expr {
public:

	Parameter_expr(const Param_symbol * s, const Globals * glob);

	bool is_parameter_expr() const { return true; }

	string to_matlab() const;

	bool is_const() const { return true; }


	bool is_real() const;

	bool is_logic() const;

	bool semantic_check() const { return true; }

	/** converts a Parameter into CNF_clause */
	CNF_clause * compute_CNF() const;

	Affine_func * compute_affine() const;

	bool is_affine() const;

	bool is_symbolic() const;

	bool is_number() const;

	Number * compute_number() const;

	void semantic_checks();

	const Param_symbol * get_value() const { return value; }

private:
	Expr * shallow_copy() const;

	const Param_symbol * value;
};
#endif //D_PARAMETER_EXPR