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+/***************************************************************************
+ function.h - Functions for internal parser
+ -------------------
+ copyright : (C) 2004 Michal Rudolf <mrudolf@kdewebdwev.org>
+
+ ***************************************************************************/
+
+/***************************************************************************
+ * *
+ * 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 <qvaluevector.h>
+
+class Parser;
+
+typedef QValueVector<ParseNode> ParameterList;
+typedef QValueVector<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
+