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/* This file is part of the KDE project
Copyright (C) 2002 Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef FSPARSER_H
#define FSPARSER_H
#include <tqstring.h>
#include <tqstringlist.h>
#include <tqdom.h>
namespace KFormula { class SymbolTable; }
class ParserNode;
/**
* The parser for simple (C style) formula strings.
*/
class FormulaStringParser {
public:
FormulaStringParser( const KFormula::SymbolTable& symbolTable, TQString formula );
~FormulaStringParser();
TQDomDocument parse();
TQStringList errorList() const { return m_errorList; }
private:
enum TokenType { NUMBER, NAME, PLUS, SUB, MUL, DIV, POW, INDEX, LP, RP, LB, RB,
ASSIGN, COMMA, SEMIC, NEWLINE, OTHER, EOL };
ParserNode* parseAssign();
ParserNode* parseExpr();
ParserNode* parseTerm();
ParserNode* parsePower();
ParserNode* parsePrimary();
void expect( TokenType type, TQString msg );
TQString nextToken();
bool eol() { return m_formula.length() == pos; }
void readNumber();
void readDigits();
void error( TQString err );
TQStringList m_errorList;
const KFormula::SymbolTable& m_symbolTable;
TQString m_formula;
uint pos;
uint line;
uint column;
bool m_newlineIsSpace;
TokenType currentType;
TQString current;
ParserNode* head;
};
#endif
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