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// Function definition -*- c++ -*-
#ifndef FUNCTION_H_
# define FUNCTION_H_
# ifdef __GNUC__
# pragma interface
# endif // __GNUC__
# include <assert.h>
/** @file Function.h
* Function (typed macro) definition
*/
/* Copyright 1999-2003 Marko Mkel (msmakela@tcs.hut.fi).
This file is part of MARIA, a reachability analyzer and model checker
for high-level Petri nets.
MARIA 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, or (at your option)
any later version.
MARIA 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.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
/** Function definition */
class Function
{
public:
/** Constructor
* @param name Name of the function
* @param arity Arity (number of function parameters)
* @param params Parameter list of the function
* @param expr Function definition
* @param copy Flag: is this a copied definition?
*/
Function (char* name,
unsigned arity,
class VariableDefinition** params,
class Expression* expr,
bool copy = false);
private:
/** Copy constructor */
Function (const class Function& old);
/** Assignment operator */
class Function& operator= (const class Function& old);
public:
/** Destructor */
~Function ();
/** Determine the name of the function */
const char* getName () const { return myName; }
/** Determine the arity of the function */
unsigned getArity () const { return myArity; }
/** Get a formal parameter */
const class VariableDefinition& operator[] (unsigned i) const {
assert (i < myArity); return *myParams[i];
}
/** Get the expression */
const class Expression& getExpr () const { return *myExpr; }
/** Determine whether this is a copied function definition */
bool isCopy () const { return myCopy; }
/** Substitute the expression */
void substitute (class Substitution& substitution);
/** Expand the function
* @param params The expression list
* @return The expanded function, or NULL in case of error
*/
class Expression* expand (class ExpressionList* params);
private:
/** Name of the function */
char* myName;
/** Arity of the function */
unsigned myArity;
/** Function parameters */
class VariableDefinition** myParams;
/** Function definition */
class Expression* myExpr;
/** Flag: is this a copied function definition? */
const bool myCopy;
};
#endif // FUNCTION_H_
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