grammaranalyzer.java

Grammatica是一个C#和Java的语法分析程序生成器(编译器的编译器)。它可以用LL(k)语法创建可读的和带有注释的源代码。它也支持创建一个运行时语法分析器

     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterUnterminatedDirective(Token node)
        throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitUnterminatedDirective(Token node)
        throws ParseException {

        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterEquals(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitEquals(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterLeftParen(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitLeftParen(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterRightParen(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitRightParen(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterLeftBrace(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitLeftBrace(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterRightBrace(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitRightBrace(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterLeftBracket(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitLeftBracket(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterRightBracket(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitRightBracket(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterQuestionMark(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitQuestionMark(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterPlusSign(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitPlusSign(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterAsterisk(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitAsterisk(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterVerticalBar(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitVerticalBar(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterSemicolon(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitSemicolon(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterIdentifier(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitIdentifier(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterQuotedString(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitQuotedString(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterRegexp(Token node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitRegexp(Token node) throws ParseException {
        return node;
    }

    /**
     * Called when entering a parse tree node.
     * 
     * @param node           the node being entered
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void enterGrammar(Production node) throws ParseException {
    }

    /**
     * Called when exiting a parse tree node.
     * 
     * @param node           the node being exited
     * 
     * @return the node to add to the parse tree
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitGrammar(Production node) throws ParseException {
        return node;
    }

    /**
     * Called when adding a child to a parse tree node.
     * 
     * @param node           the parent node
     * @param child          the child node, or null
     * 
     * @throws ParseException if the node analysis discovered errors
     */
    protected void childGrammar(Production node, Node child)
        throws ParseException {

        node.addChild(child);
    }