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/*
Copyright (C) 2003 by Walter Schreppers
Copyright (C) 2004 by Cies Breijs
This program is free software; you can redistribute it and/or
modify it under the terms of version 2 of the GNU General Public
License as published by the Free Software Foundation.
This program 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 program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef _PARSER_H_
#define _PARSER_H_
#include <qobject.h>
#include "lexer.h"
#include "treenode.h"
class Parser : public QObject
{
Q_OBJECT
public:
Parser(QTextIStream& in);
virtual ~Parser();
void parse();
TreeNode* getTree() const { return tree; }
signals:
void ErrorMsg(Token&, const QString&, uint code);
private:
bool isAddOp(Token);
bool isMulOp(Token);
void getToken();
void matchToken(int tokenType);
void appendParameters(TreeNode* node);
void Error(Token&, const QString& s, uint code);
TreeNode* Program();
TreeNode* ParamList();
TreeNode* Block();
TreeNode* Statement();
TreeNode* ExternalRun();
TreeNode* getId();
TreeNode* signedFactor();
TreeNode* Factor();
TreeNode* Term();
TreeNode* Expression();
TreeNode* Assignment(Token);
TreeNode* FunctionCall(Token);
TreeNode* Other();
TreeNode* While();
TreeNode* For();
TreeNode* ForEach();
TreeNode* If();
TreeNode* Return();
TreeNode* Break();
TreeNode* Clear();
TreeNode* Go();
TreeNode* GoX();
TreeNode* GoY();
TreeNode* Forward();
TreeNode* Backward();
TreeNode* Direction();
TreeNode* TurnLeft();
TreeNode* TurnRight();
TreeNode* Center();
TreeNode* SetPenWidth();
TreeNode* PenUp();
TreeNode* PenDown();
TreeNode* SetFgColor();
TreeNode* SetBgColor();
TreeNode* ResizeCanvas();
TreeNode* SpriteShow();
TreeNode* SpriteHide();
TreeNode* SpritePress();
TreeNode* SpriteChange();
TreeNode* Message();
TreeNode* InputWindow();
TreeNode* Print();
TreeNode* FontType();
TreeNode* FontSize();
TreeNode* Repeat();
TreeNode* Random();
TreeNode* Wait();
TreeNode* WrapOn();
TreeNode* WrapOff();
TreeNode* Reset();
TreeNode* LineBreak();
TreeNode* EndOfFile();
TreeNode* Learn();
//private locals
Lexer *lexer;
TreeNode *tree;
Token currentToken;
Token preservedToken; // to preserve the currentToken so it wont get lost
uint row;
uint col;
QStringList learnedFunctionList;
};
#endif // _PARSER_H_
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