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/***************************************************************************
function.h - Functions for internal parser
-------------------
copyright : (C) 2004 Michal Rudolf <[email protected]>
***************************************************************************/
/***************************************************************************
* *
* This program 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. *
* *
***************************************************************************/
#ifndef _HAVE_FUNCTION_H_
#define _HAVE_FUNCTION_H_
#include "parsenode.h"
#include <tqvaluevector.h>
class Parser;
typedef TQValueVector<ParseNode> ParameterList;
typedef TQValueVector<Parse::ValueType> TypeList;
typedef ParseNode(*FunctionPointer)(Parser*, const ParameterList&);
class Function
{
public:
/* default constructor - empty function */
Function();
/* construct a function from parameterlist */
Function(FunctionPointer fp, Parse::ValueType value, const TypeList& params, uint min = 99999,
uint max = 0);
/* construct a function from parameters */
Function(FunctionPointer fp, Parse::ValueType value, Parse::ValueType param1, uint min = 99999,
uint max = 0);
Function(FunctionPointer fp, Parse::ValueType value, Parse::ValueType param1, Parse::ValueType param2,
uint min = 99999, uint max = 0);
Function(FunctionPointer fp, Parse::ValueType value, Parse::ValueType param1, Parse::ValueType param2,
Parse::ValueType param3, uint min = 99999, uint max = 0);
Function(FunctionPointer fp, Parse::ValueType value, Parse::ValueType param1, Parse::ValueType param2,
Parse::ValueType param3, Parse::ValueType param4, uint min = 99999, uint max = 0);
Function(FunctionPointer fp, Parse::ValueType value, Parse::ValueType param1, Parse::ValueType param2,
Parse::ValueType param3, Parse::ValueType param4, Parse::ValueType param5,
uint min = 99999, uint max = 0);
/* if function returns value */
bool isVoid() const;
/* type of returned value */
Parse::ValueType returnValue() const;
/* type of i-th argument */
Parse::ValueType argType(uint i) const;
/* minimum number of arguments */
uint minArgs() const;
/* maximum number of arguments */
uint maxArgs() const;
/* check whether given list is appropriate for this function */
bool isValid(const ParameterList& params) const;
/* execute */
ParseNode execute(Parser* P, const ParameterList& params) const;
private:
FunctionPointer m_function;
TypeList m_params;
Parse::ValueType m_returnValue;
uint m_minArgs;
uint m_maxArgs;
};
#endif
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