File indexing completed on 2024-04-21 03:45:25

 /*
     SPDX-FileCopyrightText: 2003-2006 Cies Breijs <cies AT kde DOT nl>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "parser.h"
 
 #include <QDebug>
 
 #include <KLocalizedString>
 
 
 Parser::~Parser()
 {
 }
 
 void Parser::initialize(Tokenizer* _tokenizer, ErrorList* _errorList)
 {
     tokenizer    = _tokenizer;
     errorList    = _errorList;
 
     rootNode     = new TreeNode(new Token(Token::Root, QStringLiteral("root"), 0, 0, 0, 0));
     currentScope = rootNode;
     newScope     = nullptr;
     finished     = false;
 
     nextToken();
 }
 
 void Parser::parse()
 {
     if (finished) return;
 
 //  //qDebug() << "Parser::parse() -- main parse loop called";
     TreeNode* resultNode = parseStatement();  // parse the next statement
     if (resultNode == nullptr) {  // no statement was found
         addError(i18n("Expected a command, instead got '%1'", currentToken->look()), *currentToken, 0);
         return;
     }
 
     if (resultNode->token()->type() == Token::ScopeClose ||
         resultNode->token()->type() == Token::EndOfInput) {
         delete resultNode;
     } else {
         currentScope->appendChild(resultNode);
     }
 
     if (newScope != nullptr) {
         currentScope = newScope;
         newScope = nullptr;
     }
 }
 
 void Parser::nextToken()
 {
     // get the next relevant token, and store it in currentToken
 
     // skip spaces and comments:
     currentToken = tokenizer->getToken();
 //  //qDebug() << "########### got token: " << currentToken->look();
 
     while (currentToken->type() == Token::WhiteSpace ||
            currentToken->type() == Token::Comment) {
         delete currentToken;
         currentToken = tokenizer->getToken();
 //      //qDebug() << "########### got token: " << currentToken->look();
     }
 
     if (currentToken->type() == Token::Error)
         addError(i18n("Could not understand '%1'", currentToken->look()), *currentToken, 100);
 
 //  QString out = QString("Parser::nextToken(): \"%5\" [%6] @ (%1,%2)-(%3,%4)")
 //      .arg(currentToken->startRow())
 //      .arg(currentToken->startCol())
 //      .arg(currentToken->endRow())
 //      .arg(currentToken->endCol())
 //      .arg(currentToken->look())
 //      .arg(currentToken->type());
 //  //qDebug() << "Parser::nextToken():" << currentToken->look() << " [" << currentToken->type() << "]   on line" << currentToken->startRow();
     if (currentToken->type() == Token::EndOfInput)
         finished = true;
 }
 
 
 bool Parser::skipToken(int expectedTokenType)
 {
     // if the expectedTokenType matches the currentToken's type, dispose the currentToken and get a new one
     if (currentToken->type() == expectedTokenType) {
         delete currentToken;
         nextToken();
         return true;
     }
     return false;
 }
 
 bool Parser::skipToken(int expectedTokenType, Token& byToken)
 {
     // TODO have byToken, and "errorHappenedHereToken"
     //TODO: Translate the following QStrings?
 
     if (skipToken(expectedTokenType)) return true;
 
     switch (expectedTokenType) {
         case Token::ArgumentSeparator:
             addError(i18n("A comma was expected here..."), byToken, 0);
             break;
         case Token::EndOfInput:
             addError(i18n("Did not expect '%1', instead expected the line to end after %2",
                     currentToken->look(),
                     byToken.look()),
                byToken, 0);
             break;
         case Token::Assign:
             addError(i18n("Expected an assignment, '=', after the variable '%1'",
                     byToken.look()), byToken, 0);
             break;
         case Token::ParenthesisClose:
             addError(i18n("Did not expect '%1', instead expected a closing parenthesis, ')'",
                     currentToken->look()), byToken, 0);
             break;
         case Token::To:
             addError(i18n("Expected 'to' after 'for'"), byToken, 0);
             break;
         case Token::FunctionCall:
             addError(i18n("Expected a name for a command after 'learn' command"), byToken, 0);
             break;
     }
 
     return false;
 }
 
 
 void Parser::addError(const QString& s, const Token& t, int code)
 {
 //  if (m_testing)
 //      //qDebug() << "ERR> " << qPrintable(s) << " (parse error)";
     errorList->addError(s, t, code);
 }
 
 void Parser::printTree() const
 {
     const char* prefix = m_testing ? "NTR> " : "";
     const auto str{rootNode->toString().split(QLatin1Char('\n'), Qt::SkipEmptyParts)};
     for (const QString &line : str) {
         qDebug() << prefix << qPrintable(line.trimmed());
     }
 }
 
 
 
 TreeNode* Parser::parseStatement()
 {
     // in addition to whitespace and comments (skipped by nextToken()), also skip newlines before statements
     while (currentToken->type() == Token::EndOfLine) {
         delete currentToken;
         nextToken();
     }
 
     if (finished)
         return new TreeNode(currentToken);  // TODO check if all scopes are closed before returning + throw error
 
     switch (currentToken->type()) {
 
 //BEGIN GENERATED parser_statements_cpp CODE
 
 /* The code between the line that start with "//BEGIN GENERATED" and "//END GENERATED"
  * is generated by "generate.rb" according to the definitions specified in
  * "definitions.rb". Please make all changes in the "definitions.rb" file, since all
  * all change you make here will be overwritten the next time "generate.rb" is run.
  * Thanks for looking at the code!
  */
 
         case Token::Variable            : return parseVariable();
         case Token::FunctionCall        : return parseFunctionCall();
         case Token::ScopeOpen           : return parseScopeOpen();
         case Token::ScopeClose          : return parseScopeClose();
         case Token::Exit                : return parseExit();
         case Token::If                  : return parseIf();
         case Token::Repeat              : return parseRepeat();
         case Token::While               : return parseWhile();
         case Token::For                 : return parseFor();
         case Token::Break               : return parseBreak();
         case Token::Return              : return parseReturn();
         case Token::Wait                : return parseWait();
         case Token::Assert              : return parseAssert();
         case Token::Learn               : return parseLearn();
         case Token::Reset               : return parseReset();
         case Token::Clear               : return parseClear();
         case Token::Center              : return parseCenter();
         case Token::Go                  : return parseGo();
         case Token::GoX                 : return parseGoX();
         case Token::GoY                 : return parseGoY();
         case Token::Forward             : return parseForward();
         case Token::Backward            : return parseBackward();
         case Token::Direction           : return parseDirection();
         case Token::TurnLeft            : return parseTurnLeft();
         case Token::TurnRight           : return parseTurnRight();
         case Token::PenWidth            : return parsePenWidth();
         case Token::PenUp               : return parsePenUp();
         case Token::PenDown             : return parsePenDown();
         case Token::PenColor            : return parsePenColor();
         case Token::CanvasColor         : return parseCanvasColor();
         case Token::CanvasSize          : return parseCanvasSize();
         case Token::SpriteShow          : return parseSpriteShow();
         case Token::SpriteHide          : return parseSpriteHide();
         case Token::Print               : return parsePrint();
         case Token::FontSize            : return parseFontSize();
         case Token::Random              : return parseRandom();
         case Token::GetX                : return parseGetX();
         case Token::GetY                : return parseGetY();
         case Token::Message             : return parseMessage();
         case Token::Ask                 : return parseAsk();
         case Token::Pi                  : return parsePi();
         case Token::Tan                 : return parseTan();
         case Token::Sin                 : return parseSin();
         case Token::Cos                 : return parseCos();
         case Token::ArcTan              : return parseArcTan();
         case Token::ArcSin              : return parseArcSin();
         case Token::ArcCos              : return parseArcCos();
         case Token::Sqrt                : return parseSqrt();
         case Token::Round               : return parseRound();
         case Token::GetDirection        : return parseGetDirection();
         case Token::Mod                 : return parseMod();
 
 //END GENERATED parser_statements_cpp CODE
         case Token::Error       : return new TreeNode(currentToken);
         default : {
             //Token type is something else...
             ////qDebug() << "Parser::parseStatement(): I don't know this Token type.";
             ////qDebug() << "Look: " << currentToken->look() << " type: " << currentToken->type();
             addError(i18n("You cannot put '%1' here.", currentToken->look()), *currentToken, 0);
             finished = true;
             return new TreeNode(currentToken);
         }
     }
 }
 
 
 TreeNode* Parser::parseFactor()
 {
 //  //qDebug() << "Parser::parseFactor()";
     Token* rememberedToken;
     TreeNode* node;
     switch (currentToken->type()) {
         case Token::ParenthesisOpen:
             rememberedToken = currentToken;
             nextToken();
             node = parseExpression();
             skipToken(Token::ParenthesisClose, *rememberedToken);
             break;
 
         case Token::FunctionCall:
             node = parseFunctionCall();
             break;
 
         case Token::Variable:
             node = new TreeNode(currentToken);
             nextToken();
             break;
 
         case Token::String:
             node = new TreeNode(currentToken);
             { // extra scope to localize the QString 'str'
                 QString str = currentToken->look();
                 if (!currentToken->look().endsWith(QLatin1Char('\"'))) {
                     str += QLatin1String("\"");
                     addError(i18n("Text string was not properly closed, expected a double quote, ' \" ', to close the string."), *currentToken, 0);
                 }
                 node->value()->setString(str.mid(1, str.length() - 2));
             }
             nextToken();
             break;
 
         case Token::Number:
             node = new TreeNode(currentToken);
             {
                 bool ok = true;
                 double num = currentToken->look().toDouble(&ok);
                 if (ok) {
                     node->value()->setNumber(num);
                     nextToken();
                 } else {
                     qCritical("Parser::parseFactor(): could not parse a number");
                 }
             }
             break;
 
         case Token::True:
             node = new TreeNode(currentToken);
             node->value()->setBool(true);
             nextToken();
             break;
 
         case Token::False:
             node = new TreeNode(currentToken);
             node->value()->setBool(false);
             nextToken();
             break;
 
 //      case Token::Run:
 //          node = ExternalRun();
 //          break;
 // 
 //      case tokInputWindow:
 //          node = InputWindow();
 //          break;
 // 
 //      case tokRandom:
 //          node = Random();
 //          break;
 // 
 //      case Token::EndOfLine:
 //          node = new TreeNode(currentToken);
 //          break;
 
 
             default:
                 // TODO maybe precheck if this is a statement that returns something
                 node = parseStatement();
                 break;
 
 
 //      default:
 //          QString s = currentToken->look();
 //          if ( s.isEmpty() || currentToken->type() == Token::EndOfInput )
 //          {
 // //               Error(currentToken, i18n("INTERNAL ERROR NR %1: please sent this Logo script to KTurtle developers").arg(1), 1020);
 //              // if this error occurs the see the Parser::Repeat for the good solution using 'preservedToken'
 //          }
 //          else
 //          {
 // //               Error(currentToken, i18n("Cannot understand '%1', expected an expression after the '%2' command").arg(s).arg(preservedToken->look()), 1020);
 //          }
 //          node = new TreeNode(currentToken);
 //          nextToken();
 //          break;
     }
     return node;
 }
 
 
 TreeNode* Parser::parseSignedFactor()
 {
 //  //qDebug() << "Parser::parseSignedFactor()";
     // see if there is a plus, minus or 'not' in front of a factor
     Token* rememberedToken;
     TreeNode* node;
     switch (currentToken->type()) {
         case Token::Addition:
             nextToken();
             return parseFactor();
             break;
 
         case Token::Subtraction:
             rememberedToken = currentToken;
             nextToken();
             node = parseFactor();
             if (node->token()->type() == Token::Number) {
                 // in case of just a constant (-3) situation
                 node->value()->setNumber(-1 * node->value()->number());
                 return node;
             } else {
                 // in case of a variable or other situation (-$a)
                 TreeNode* minusNode = new TreeNode(rememberedToken);
                 minusNode->appendChild(node);
                 return minusNode;
             }
             break;
 
         case Token::Not:
             rememberedToken = currentToken;
             nextToken();
             node = parseFactor();
             { // extra scope needed to localize not_Node
                 TreeNode* notNode = new TreeNode(rememberedToken);
                 notNode->appendChild(node);
                 return notNode;
             }
             break;
 
         default:
             // no 'sign', no problem; just had to check if there was any... continue with the real work:
             return parseFactor();
             break;
     }
 }
 
 
 
 TreeNode* Parser::parseTerm()
 {
 //  //qDebug() << "Parser::parseTerm()";
     TreeNode* termNode = parseSignedFactor();
     TreeNode* pos = termNode;
     TreeNode* left = nullptr;
     TreeNode* right = nullptr;
 
     while ( (currentToken->type() == Token::Multiplication) ||
             (currentToken->type() == Token::Division) ||
             (currentToken->type() == Token::Power)  ) {
         // while we find a multiplicative operator do...
         left = pos;
         pos = new TreeNode(currentToken);
         pos->appendChild(left);
         nextToken();
         right = parseSignedFactor();
         if (right != nullptr)
             pos->appendChild(right);
         termNode = pos;
     }
     return termNode;
 }
 
 
 TreeNode* Parser::parseExpression()
 {
 //  //qDebug() << "Parser::parseExpression()";
     TreeNode* expressionNode = parseTerm();
     TreeNode* pos = expressionNode;
     TreeNode* left = nullptr;
     TreeNode* right = nullptr;
 
     Token* prevToken = nullptr;
 
     while ((currentToken->type() == Token::Addition) ||
            (currentToken->type() == Token::Subtraction) ||
            (currentToken->type() == Token::GreaterThan) ||
            (currentToken->type() == Token::GreaterOrEquals) ||
            (currentToken->type() == Token::LessThan) ||
            (currentToken->type() == Token::LessOrEquals) ||
            (currentToken->type() == Token::Equals) ||
            (currentToken->type() == Token::NotEquals) ||
            (currentToken->type() == Token::Or) ||
            (currentToken->type() == Token::And)) {
         left = pos;
         pos = new TreeNode(currentToken);
         pos->appendChild(left);
         prevToken = currentToken;
         nextToken();
         
         if(prevToken->type() == Token::And ||
            prevToken->type() == Token::Or)
             right = parseExpression();
         else
             right = parseTerm();
         if (right != nullptr) pos->appendChild(right);
         expressionNode = pos;
     }
     return expressionNode;
 }
 
 
 
 void Parser::appendArguments(TreeNode* node)
 {
     // appends the nodes of arguments to the node, does not do any type/quantity checking.
     // this because it's also used for the user defined 'functionCall' where we don't know type nor quantity
     // we also don't know if this node is (part of) an argument itself
     if (currentToken->type() == Token::EndOfLine ||
         currentToken->type() == Token::EndOfInput ||
         currentToken->type() == Token::ArgumentSeparator ||
         currentToken->type() == Token::ParenthesisClose ||
         currentToken->type() == Token::ScopeOpen ||
         currentToken->type() == Token::ScopeClose) return;
     node->appendChild(parseExpression()); // append the first parameter
     while (skipToken(Token::ArgumentSeparator)) {  // pushes through the comma
         if (currentToken->type() == Token::EndOfLine ||
             currentToken->type() == Token::EndOfInput)
             return; // catch forgotten expressions (go 10,)
         node->appendChild(parseExpression());
     }
 }
 
 
 
 //BEGIN GENERATED parser_cpp CODE
 
 /* The code between the line that start with "//BEGIN GENERATED" and "//END GENERATED"
  * is generated by "generate.rb" according to the definitions specified in
  * "definitions.rb". Please make all changes in the "definitions.rb" file, since all
  * all change you make here will be overwritten the next time "generate.rb" is run.
  * Thanks for looking at the code!
  */
 
 TreeNode* Parser::parseVariable() {
     // This is called to the variable is the first token on a line.
     // There has to be an assignment token right after it...
     TreeNode* variableNode = new TreeNode(currentToken);
     nextToken();
     Token* remeberedToken = new Token(*currentToken);
     skipToken(Token::Assign, *variableNode->token());
     TreeNode* assignNode = new TreeNode(remeberedToken);
     assignNode->appendChild(variableNode);      // the LHV; the symbol
     assignNode->appendChild(parseExpression()); // the RHV; the expression
     return assignNode;
 }
 
 TreeNode* Parser::parseFunctionCall() {
     TreeNode* node = new TreeNode(currentToken);
     node->token()->setType(Token::FunctionCall);
     nextToken();
     appendArguments(node);
     return node;
 }
 TreeNode* Parser::parseScopeOpen() {
 
     TreeNode* scopeNode = new TreeNode(new Token(Token::Scope, QStringLiteral("{...}"), currentToken->startRow(), currentToken->startCol(), 0, 0));
     delete currentToken;
     nextToken();
     // cannot change the currentScope to this scope cauz we still have to work in the currentScope
     // so we set the newScope, which the currentScope will become after parsing the current statement
     newScope = scopeNode;
     return scopeNode;
 }
 TreeNode* Parser::parseScopeClose() {
 
     TreeNode* node = new TreeNode(currentToken);
     int endRow = currentToken->endRow();
     int endCol = currentToken->endCol();
     nextToken();
     while (currentToken->type() == Token::EndOfLine) {  // allow newlines before else
         delete currentToken;
         nextToken();
     }
     if (currentScope->parent() && 
         currentScope->parent()->token()->type() == Token::If && 
         currentToken->type() == Token::Else) {
         currentScope->parent()->appendChild(parseElse());
     }
     if (currentScope != rootNode) {
         // find the parent scope of this scope, and make it current
         TreeNode* parentScope = currentScope;
         do {
             parentScope = parentScope->parent();
         } while (parentScope != rootNode && parentScope->token()->type() != Token::Scope);
         currentScope->token()->setEndRow(endRow);
         currentScope->token()->setEndCol(endCol);
         currentScope = parentScope;
     }
     return node;
 }
 TreeNode* Parser::parseExit() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseIf() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     node->appendChild(parseExpression());
     if (currentToken->type() == Token::ScopeOpen) {
         node->appendChild(parseScopeOpen());  // if followed by a scope
     }
     return node;
 }
 TreeNode* Parser::parseElse() {
 
     nextToken();
     if (currentToken->type() == Token::ScopeOpen) {
         return parseScopeOpen();  // if followed by a scope
     }
     return parseStatement();    // if followed by single statement
 }
 TreeNode* Parser::parseRepeat() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     node->appendChild(parseExpression());
     if (currentToken->type() == Token::ScopeOpen) {
         node->appendChild(parseScopeOpen());  // if followed by a scope
     } else {
         node->appendChild(parseStatement());  // if followed by single statement
     }
     return node;
 }
 TreeNode* Parser::parseWhile() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     node->appendChild(parseExpression());
     if (currentToken->type() == Token::ScopeOpen) {
         node->appendChild(parseScopeOpen());  // if followed by a scope
     } else {
         node->appendChild(parseStatement());  // if followed by single statement
     }
     return node;
 }
 TreeNode* Parser::parseFor() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     Token* firstToken = currentToken;
     nextToken();
     if (firstToken->type() == Token::Variable && currentToken->type() == Token::Assign) {
         node->token()->setType(Token::ForTo);
         node->appendChild(new TreeNode(firstToken));
         nextToken();
         node->appendChild(parseExpression());
         skipToken(Token::To, *node->token());
         node->appendChild(parseExpression());
         if (currentToken->type() == Token::Step) {
             nextToken();
             node->appendChild(parseExpression());
         } else {
             TreeNode* step = new TreeNode(new Token(Token::Number, QStringLiteral("1"), 0,0,0,0));
             step->setValue(Value(1.0));
             node->appendChild(step);
         }
 //  } else if (currentToken->type() == Token::In) {
 //      // @TODO something for a for-in loop
     } else {
         addError(i18n("'for' was called wrongly"), *node->token(), 0);
         finished = true;  // abort after this error
         return node;
     }
 
     if (currentToken->type() == Token::ScopeOpen) {
         node->appendChild(parseScopeOpen());  // if followed by a scope
     } else {
         node->appendChild(parseStatement());  // if followed by single statement
     }
 
     return node;
 }
 TreeNode* Parser::parseBreak() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseReturn() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseWait() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseAssert() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseLearn() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     node->appendChild(new TreeNode(new Token(*currentToken)));
     skipToken(Token::FunctionCall, *node->token());
     
     TreeNode* argumentList = new TreeNode(new Token(Token::ArgumentList, QStringLiteral("arguments"), 0, 0, 0, 0));
     while (currentToken->type() == Token::Variable) {
         // cannot just call appendArguments here because we're only appending Token::Variable tokens
         argumentList->appendChild(new TreeNode(currentToken));
         nextToken();
         if (currentToken->type() != Token::ArgumentSeparator) break;
         nextToken();
     }
     node->appendChild(argumentList);
     
     //Skip all the following EndOfLine's
     while (currentToken->type() == Token::EndOfLine) {
         delete currentToken;
         nextToken();
     }
 
     if (currentToken->type() == Token::ScopeOpen) {
         node->appendChild(parseScopeOpen());  // if followed by a scope
     } else {
         addError(i18n("Expected a scope after the 'learn' command"), *node->token(), 0);
     }
     return node;
 }
 TreeNode* Parser::parseReset() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseClear() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseCenter() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseGo() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseGoX() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseGoY() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseForward() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseBackward() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseDirection() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseTurnLeft() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseTurnRight() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parsePenWidth() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parsePenUp() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parsePenDown() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parsePenColor() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 
 TreeNode* Parser::parseCanvasColor() {
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 
 TreeNode* Parser::parseCanvasSize() {
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 
 TreeNode* Parser::parseSpriteShow() {
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseSpriteHide() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parsePrint() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseFontSize() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseRandom() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseGetX() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseGetY() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseMessage() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseAsk() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parsePi() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseTan() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseSin() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseCos() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseArcTan() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseArcSin() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseArcCos() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseSqrt() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseRound() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseGetDirection() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 TreeNode* Parser::parseMod() {
 
     TreeNode* node = new TreeNode(currentToken);
     nextToken();
     appendArguments(node);
     skipToken(Token::EndOfLine, *node->token());
     return node;
 }
 
 //END GENERATED parser_cpp CODE