Examples of net.percederberg.grammatica.parser.ProductionPatternElement

Package net.percederberg.grammatica.parser

Examples of net.percederberg.grammatica.parser.ProductionPatternElement

net.percederberg.grammatica.parser.ProductionPatternElement
A production pattern element. This class represents a reference to either a token or a production. Each element also contains minimum and maximum occurence counters, controlling the number of repetitions allowed. A production pattern element is always contained within a production pattern rule. @author Per Cederberg, @version 1.0

     *
     * @throws ParseException if the node analysis discovered errors
     */
    protected Node exitProduction(Production node) throws ParseException {
        ProductionPatternAlternative  alt;
        ProductionPatternElement      elem;
        Node                          child;


        alt = new ProductionPatternAlternative();
        node.addValue(alt);
        for (int i = 0; i < node.getChildCount(); i++) {

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            id = ((TokenPattern) getValue(child, 0)).getId();
            break;
        case GrammarConstants.LEFT_PAREN:
        case GrammarConstants.LEFT_BRACE:
        case GrammarConstants.LEFT_BRACKET:
            ProductionPatternElement  elem;


            if (child.getId() == GrammarConstants.LEFT_BRACE) {
                min = 0;
                max = -1;
            } else if (child.getId() == GrammarConstants.LEFT_BRACKET) {
                min = 0;
                max = 1;
            }
            elem = getProductionElement(getChildAt(node, 1));
            token = elem.isToken();
            id = elem.getId();
            break;
        }


        // Handle optional '?', '*' or '+'
        child = getChildAt(node, node.getChildCount() - 1);
        if (child.getId() == GrammarConstants.QUESTION_MARK) {
            min = 0;
            max = 1;
        } else if (child.getId() == GrammarConstants.ASTERISK) {
            min = 0;
            max = -1;
        } else if (child.getId() == GrammarConstants.PLUS_SIGN) {
            min = 1;
            max = -1;
        }


        // Create production pattern element
        node.addValue(new ProductionPatternElement(token, id, min, max));
        return node;
    }

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                }
            }
            grammar.addProduction(prod,
                                  node.getStartLine(),
                                  node.getEndLine());
            return new ProductionPatternElement(false,
                                                nextSynteticId++,
                                                1,
                                                1);
        }
    }

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     * @param constants      the constants file generator
     */
    private void addProductionAlternative(ProductionPatternAlternative alt,
                                          CSharpConstantsFile constants) {


        ProductionPatternElement  elem;
        StringBuffer              code;


        initMethod.addCode("alt = new ProductionPatternAlternative();");
        for (int i = 0; i < alt.getElementCount(); i++) {
            elem = alt.getElement(i);
            code = new StringBuffer();
            code.append("alt.");
            if (elem.isToken()) {
                code.append("AddToken(");
            } else {
                code.append("AddProduction(");
            }
            code.append("(int) ");
            code.append(getConstant(constants, elem.getId()));
            code.append(", ");
            code.append(elem.getMinCount());
            code.append(", ");
            if (elem.getMaxCount() == Integer.MAX_VALUE) {
                code.append("-1");
            } else {
                code.append(elem.getMaxCount());
            }
            code.append(");");
            initMethod.addCode(code.toString());
        }
        initMethod.addCode("pattern.AddAlternative(alt);");

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     * @param constants      the constants file generator
     */
    private void addProductionAlternative(ProductionPatternAlternative alt,
                                          JavaConstantsFile constants) {


        ProductionPatternElement  elem;
        StringBuffer              code;


        initMethod.addCode("alt = new ProductionPatternAlternative();");
        for (int i = 0; i < alt.getElementCount(); i++) {
            elem = alt.getElement(i);
            code = new StringBuffer();
            code.append("alt.");
            if (elem.isToken()) {
                code.append("addToken(");
            } else {
                code.append("addProduction(");
            }
            code.append(getConstant(constants, elem.getId()));
            code.append(", ");
            code.append(elem.getMinCount());
            code.append(", ");
            if (elem.getMaxCount() == Integer.MAX_VALUE) {
                code.append("-1");
            } else {
                code.append(elem.getMaxCount());
            }
            code.append(");");
            initMethod.addCode(code.toString());
        }
        initMethod.addCode("pattern.addAlternative(alt);");

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     * @param constants      the constants file generator
     */
    private void addProductionAlternative(ProductionPatternAlternative alt,
                                          VisualBasicConstantsFile constants) {


        ProductionPatternElement  elem;
        StringBuffer              code;


        initMethod.addCode("alt = New ProductionPatternAlternative()");
        for (int i = 0; i < alt.getElementCount(); i++) {
            elem = alt.getElement(i);
            code = new StringBuffer();
            code.append("alt.");
            if (elem.isToken()) {
                code.append("AddToken(");
            } else {
                code.append("AddProduction(");
            }
            code.append("CInt(");
            code.append(getConstant(constants, elem.getId()));
            code.append("), ");
            code.append(elem.getMinCount());
            code.append(", ");
            if (elem.getMaxCount() == Integer.MAX_VALUE) {
                code.append("-1");
            } else {
                code.append(elem.getMaxCount());
            }
            code.append(")");
            initMethod.addCode(code.toString());
        }
        initMethod.addCode("pattern.AddAlternative(alt)");

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Related Classes of net.percederberg.grammatica.parser.ProductionPatternElement

net.percederberg.grammatica.output.CSharpParserFile

net.percederberg.grammatica.output.JavaParserFile

net.percederberg.grammatica.output.VisualBasicParserFile

net.percederberg.grammatica.SecondPassAnalyzer

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