// ===========================================================================
// This file has been generated by
// Rats! Parser Generator, version 1.14.3,
// (C) 2004-2008 Robert Grimm,
// on Thursday, November 13, 2008 at 9:26:09 PM.
// Edit at your own risk.
// ===========================================================================

package xtc.lang;

import java.io.Reader;
import java.io.IOException;

import java.util.HashSet;
import java.util.Set;

import xtc.util.Action;
import xtc.util.Pair;

import xtc.tree.Node;
import xtc.tree.GNode;

import xtc.parser.ParserBase;
import xtc.parser.Column;
import xtc.parser.Result;
import xtc.parser.SemanticValue;
import xtc.parser.ParseError;

/**
 * Packrat parser for grammar <code>xtc.lang.Java</code>.
 *
 * <p />This class has been generated by the <i>Rats!</i> parser
 * generator, version 1.14.3, (C) 2004-2008 Robert Grimm.
 */
public final class JavaParser extends ParserBase {

  /** The JAVA_KEYWORDS set. */
  public static final Set<String> JAVA_KEYWORDS = new HashSet<String>();

  // =========================================================================

  /** Chunk 1 of memoized results. */
  static final class Chunk1 {
    Result fModifiers;
    Result fFormalParameters;
    Result fFormalParameters$$Star1;
    Result fDeclarators;
    Result fDeclarators$$Star1;
    Result fBlock;
    Result fBlock$$Star1;
    Result fParExpression;
    Result fCatchClause;
    Result fExpression;
  }

  /** Chunk 2 of memoized results. */
  static final class Chunk2 {
    Result fConditionalExpression;
    Result fLogicalOrExpression;
    Result fRelationalExpression;
    Result fVariableInitializer;
    Result fResultType;
    Result fType;
    Result fTypeName;
    Result fPrimitiveType;
    Result fDimensions;
    Result fDimensions$$Plus1;
  }

  /** Chunk 3 of memoized results. */
  static final class Chunk3 {
    Result fQualifiedIdentifier;
    Result fQualifiedIdentifier$$Star1;
    Result fIdentifier;
    Result fWord;
    Result fSymbol;
  }

  // =========================================================================

  /** Memoization table column. */
  static final class JavaParserColumn extends Column {
    Chunk1 chunk1;
    Chunk2 chunk2;
    Chunk3 chunk3;
  }

  // =========================================================================

  /**
   * Create a new packrat parser.
   *
   * @param reader The reader.
   * @param file The file name.
   */
  public JavaParser(final Reader reader, final String file) {
    super(reader, file);
  }

  /**
   * Create a new packrat parser.
   *
   * @param reader The file reader.
   * @param file The file name.
   * @param size The file size.
   */
  public JavaParser(final Reader reader, final String file, final int size) {
    super(reader, file, size);
  }

  // =========================================================================

  protected Column newColumn() {
    return new JavaParserColumn();
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.CompilationUnit.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  public Result pCompilationUnit(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    Result     yyResult;
    int        yyRepetition1;
    Pair<Node> yyRepValue1;
    int        yyOption1;
    Node       yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSpacing(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {

      yyOption1  = yyResult.index;
      yyOpValue1 = null;

      yyResult = pPackageDeclaration(yyOption1);
      yyError  = yyResult.select(yyError, yyOption1);
      if (yyResult.hasValue()) {
        final Node v$el$1 = yyResult.semanticValue();

        yyOption1  = yyResult.index;
        yyOpValue1 = v$el$1;
      }
      { // Start scope for v$g$1.
        final Node v$g$1 = yyOpValue1;

        yyRepetition1 = yyOption1;
        yyRepValue1   = Pair.empty();
        while (true) {

          yyResult = pImportDeclaration(yyRepetition1);
          yyError  = yyResult.select(yyError, yyRepetition1);
          if (yyResult.hasValue()) {
            final Node v$el$2 = yyResult.semanticValue();

            yyRepetition1 = yyResult.index;
            yyRepValue1   = new Pair<Node>(v$el$2, yyRepValue1);
            continue;
          }
          break;
        }
        { // Start scope for v$g$2.
          final Pair<Node> v$g$2 = yyRepValue1.reverse();

          yyRepValue1   = Pair.empty();
          while (true) {

            yyResult = pDeclaration(yyRepetition1);
            yyError  = yyResult.select(yyError, yyRepetition1);
            if (yyResult.hasValue()) {
              final Node v$el$3 = yyResult.semanticValue();

              yyRepetition1 = yyResult.index;
              yyRepValue1   = new Pair<Node>(v$el$3, yyRepValue1);
              continue;
            }
            break;
          }
          { // Start scope for v$g$3.
            final Pair<Node> v$g$3 = yyRepValue1.reverse();

            yyOption1  = yyRepetition1;

            yyC = character(yyOption1);
            if ('\u001a' == yyC) {
              yyIndex = yyOption1 + 1;

              yyOption1  = yyIndex;
            }

            yyResult = pEndOfFile(yyOption1);
            yyError  = yyResult.select(yyError);
            if (yyResult.hasValue()) {

              yyValue = GNode.create("CompilationUnit", v$g$2.size() + v$g$3.size() + 1).
                add(v$g$1).addAll(v$g$2).addAll(v$g$3);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            }
          } // End scope for v$g$3.
        } // End scope for v$g$2.
      } // End scope for v$g$1.
    }

    // Done.
    yyError = yyError.select("compilation unit expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.PackageDeclaration.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pPackageDeclaration(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Declaration>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("package")) {

      yyResult = pQualifiedIdentifier(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(";")) {

          yyValue = GNode.create("PackageDeclaration", null, v$g$2);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("';' expected", yyBase);
        }
      }
    }

    // Done.
    yyError = yyError.select("package declaration expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ImportDeclaration.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pImportDeclaration(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyOption1;
    String     yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Declaration>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("import")) {

      yyResult = pQualifiedIdentifier(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyOption1  = yyResult.index;
        yyOpValue1 = null;

        yyResult = pDotStarTail(yyOption1);
        yyError  = yyResult.select(yyError, yyOption1);
        if (yyResult.hasValue()) {
          final String v$el$1 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = v$el$1;
        }
        { // Start scope for v$g$3.
          final String v$g$3 = yyOpValue1;

          yyBase   = yyOption1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(";")) {

            yyValue = GNode.create("ImportDeclaration", null, v$g$2, v$g$3);
            yyValue.setLocation(location(yyStart));

            return yyResult.createValue(yyValue, yyError);
          } else {
            yyError = yyError.select("';' expected", yyBase);
          }
        } // End scope for v$g$3.
      }
    }

    // Done.
    yyError = yyError.select("import declaration expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.DotStarTail.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pDotStarTail(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(".")) {

      yyBase   = yyResult.index;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue("*")) {
        yyValue = "*";

        return yyResult.createValue(yyValue, yyError);
      } else {
        yyError = yyError.select("'*' expected", yyBase);
      }
    }

    // Done.
    yyError = yyError.select("dot star tail expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Modifiers.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pModifiers(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk1) yyColumn.chunk1 = new Chunk1();
    if (null == yyColumn.chunk1.fModifiers) 
      yyColumn.chunk1.fModifiers = pModifiers$1(yyStart);
    return yyColumn.chunk1.fModifiers;
  }

  /** Actually parse xtc.lang.Java.Modifiers. */
  private Result pModifiers$1(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pModifierList(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Pair<Node> v$g$1 = yyResult.semanticValue();

      yyValue = GNode.createFromPair("Modifiers", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ModifierList.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pModifierList(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyRepetition1;
    Pair<Node> yyRepValue1;
    Pair<Node> yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyRepetition1 = yyStart;
    yyRepValue1   = Pair.empty();
    while (true) {

      yyResult = pModifier(yyRepetition1);
      yyError  = yyResult.select(yyError, yyRepetition1);
      if (yyResult.hasValue()) {
        final Node v$el$1 = yyResult.semanticValue();

        yyRepetition1 = yyResult.index;
        yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
        continue;
      }
      break;
    }
    { // Start scope for yyValue.
      yyValue = yyRepValue1.reverse();

      return new SemanticValue(yyValue, yyRepetition1, yyError);
    } // End scope for yyValue.
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Modifier.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pModifier(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Public>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("public")) {
      final String v$g$1 = "public";

      yyValue = GNode.create("Modifier", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Protected>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("protected")) {
      final String v$g$2 = "protected";

      yyValue = GNode.create("Modifier", v$g$2);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Private>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("private")) {
      final String v$g$3 = "private";

      yyValue = GNode.create("Modifier", v$g$3);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Static>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("static")) {
      final String v$g$4 = "static";

      yyValue = GNode.create("Modifier", v$g$4);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Abstract>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("abstract")) {
      final String v$g$5 = "abstract";

      yyValue = GNode.create("Modifier", v$g$5);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Final>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("final")) {
      final String v$g$6 = "final";

      yyValue = GNode.create("Modifier", v$g$6);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Native>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("native")) {
      final String v$g$7 = "native";

      yyValue = GNode.create("Modifier", v$g$7);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Synchronized>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("synchronized")) {
      final String v$g$8 = "synchronized";

      yyValue = GNode.create("Modifier", v$g$8);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Transient>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("transient")) {
      final String v$g$9 = "transient";

      yyValue = GNode.create("Modifier", v$g$9);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Volatile>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("volatile")) {
      final String v$g$10 = "volatile";

      yyValue = GNode.create("Modifier", v$g$10);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Strictfp>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("strictfp")) {
      final String v$g$11 = "strictfp";

      yyValue = GNode.create("Modifier", v$g$11);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("modifier expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.FormalParameter.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pFormalParameter(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyOption1;
    Node       yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Parameter>.

    yyResult = pVariableModifiers(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyResult = pType(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyResult = pIdentifier(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final String v$g$4 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = null;

          yyResult = pDimensions(yyOption1);
          yyError  = yyResult.select(yyError, yyOption1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = v$el$1;
          }
          { // Start scope for v$g$5.
            final Node v$g$5 = yyOpValue1;

            yyValue = GNode.create("FormalParameter", v$g$1, v$g$2, null, v$g$4, v$g$5);
            yyValue.setLocation(location(yyStart));

            return new SemanticValue(yyValue, yyOption1, yyError);
          } // End scope for v$g$5.
        }
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.VariableModifiers.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pVariableModifiers(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Final>.

    yyResult = pFinalModifier(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyValue = GNode.create("Modifiers", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Nonfinal>.

    yyValue = GNode.create("Modifiers", false);
    yyValue.setLocation(location(yyStart));

    return new SemanticValue(yyValue, yyStart, yyError);
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.FinalModifier.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pFinalModifier(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("final")) {
      final String v$g$1 = "final";

      yyValue = GNode.create("Modifier", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("final modifier expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.FormalParameters.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pFormalParameters(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk1) yyColumn.chunk1 = new Chunk1();
    if (null == yyColumn.chunk1.fFormalParameters) 
      yyColumn.chunk1.fFormalParameters = pFormalParameters$1(yyStart);
    return yyColumn.chunk1.fFormalParameters;
  }

  /** Actually parse xtc.lang.Java.FormalParameters. */
  private Result pFormalParameters$1(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("(")) {

      final int yyChoice1 = yyResult.index;

      // Nested alternative 1.

      yyResult = pFormalParameter(yyChoice1);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyResult = pFormalParameters$$Star1(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Pair<Node> v$g$2 = yyResult.semanticValue();

          yyBase   = yyResult.index;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(")")) {

            yyValue = GNode.createFromPair("FormalParameters", v$g$1, v$g$2);
            yyValue.setLocation(location(yyStart));

            return yyResult.createValue(yyValue, yyError);
          } else {
            yyError = yyError.select("')' expected", yyBase);
          }
        }
      }

      // Nested alternative 2.

      yyBase   = yyChoice1;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue(")")) {

        yyValue = GNode.create("FormalParameters", false);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      } else {
        yyError = yyError.select("')' expected", yyBase);
      }
    }

    // Done.
    yyError = yyError.select("formal parameters expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.FormalParameters$$Star1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pFormalParameters$$Star1(final int yyStart) 
    throws IOException {

    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk1) yyColumn.chunk1 = new Chunk1();
    if (null == yyColumn.chunk1.fFormalParameters$$Star1) 
      yyColumn.chunk1.fFormalParameters$$Star1 = pFormalParameters$$Star1$1(yyStart);
    return yyColumn.chunk1.fFormalParameters$$Star1;
  }

  /** Actually parse xtc.lang.Java.FormalParameters$$Star1. */
  private Result pFormalParameters$$Star1$1(final int yyStart) 
    throws IOException {

    Result     yyResult;
    Pair<Node> yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(",")) {

      yyResult = pFormalParameter(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$el$1 = yyResult.semanticValue();

        yyResult = pFormalParameters$$Star1(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Pair<Node> v$2 = yyResult.semanticValue();

          yyValue = new Pair<Node>(v$el$1, v$2);

          return yyResult.createValue(yyValue, yyError);
        }
      }
    }

    // Alternative 2.

    yyValue = Pair.empty();

    return new SemanticValue(yyValue, yyStart, yyError);
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Declarator.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pDeclarator(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyOption1;
    Node       yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Declarator>.

    yyResult = pIdentifier(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$1 = yyResult.semanticValue();

      yyOption1  = yyResult.index;
      yyOpValue1 = null;

      yyResult = pDimensions(yyOption1);
      yyError  = yyResult.select(yyError, yyOption1);
      if (yyResult.hasValue()) {
        final Node v$el$1 = yyResult.semanticValue();

        yyOption1  = yyResult.index;
        yyOpValue1 = v$el$1;
      }
      { // Start scope for v$g$2.
        final Node v$g$2 = yyOpValue1;

        yyOpValue1 = null;

        yyBase   = yyOption1;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue("=")) {

          yyResult = pVariableInitializer(yyResult.index);
          yyError  = yyResult.select(yyError, yyOption1);
          if (yyResult.hasValue()) {
            final Node v$el$2 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = v$el$2;
          }
        } else {
          yyError = yyError.select("'=' expected", yyBase);
        }
        { // Start scope for v$g$3.
          final Node v$g$3 = yyOpValue1;

          yyValue = GNode.create("Declarator", v$g$1, v$g$2, v$g$3);
          yyValue.setLocation(location(yyStart));

          return new SemanticValue(yyValue, yyOption1, yyError);
        } // End scope for v$g$3.
      } // End scope for v$g$2.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Declarators.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pDeclarators(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk1) yyColumn.chunk1 = new Chunk1();
    if (null == yyColumn.chunk1.fDeclarators) 
      yyColumn.chunk1.fDeclarators = pDeclarators$1(yyStart);
    return yyColumn.chunk1.fDeclarators;
  }

  /** Actually parse xtc.lang.Java.Declarators. */
  private Result pDeclarators$1(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pDeclarator(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyResult = pDeclarators$$Star1(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Pair<Node> v$g$2 = yyResult.semanticValue();

        yyValue = GNode.createFromPair("Declarators", v$g$1, v$g$2);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.Declarators$$Star1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pDeclarators$$Star1(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk1) yyColumn.chunk1 = new Chunk1();
    if (null == yyColumn.chunk1.fDeclarators$$Star1) 
      yyColumn.chunk1.fDeclarators$$Star1 = pDeclarators$$Star1$1(yyStart);
    return yyColumn.chunk1.fDeclarators$$Star1;
  }

  /** Actually parse xtc.lang.Java.Declarators$$Star1. */
  private Result pDeclarators$$Star1$1(final int yyStart) throws IOException {
    Result     yyResult;
    Pair<Node> yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(",")) {

      yyResult = pDeclarator(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$el$1 = yyResult.semanticValue();

        yyResult = pDeclarators$$Star1(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Pair<Node> v$2 = yyResult.semanticValue();

          yyValue = new Pair<Node>(v$el$1, v$2);

          return yyResult.createValue(yyValue, yyError);
        }
      }
    }

    // Alternative 2.

    yyValue = Pair.empty();

    return new SemanticValue(yyValue, yyStart, yyError);
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ClassBody.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pClassBody(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyRepetition1;
    Pair<Node> yyRepValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Body>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("{")) {

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pDeclaration(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Node v$el$1 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$g$1.
        final Pair<Node> v$g$1 = yyRepValue1.reverse();

        yyBase   = yyRepetition1;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue("}")) {

          yyValue = GNode.createFromPair("ClassBody", v$g$1);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("'}' expected", yyBase);
        }
      } // End scope for v$g$1.
    }

    // Done.
    yyError = yyError.select("class body expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Declaration.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pDeclaration(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyOption1;
    Object     yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pModifiers(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      final int yyChoice1 = yyResult.index;

      // Nested alternative 1.

      yyResult = pType(yyChoice1);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyResult = pDeclarators(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$3 = yyResult.semanticValue();

          yyBase   = yyResult.index;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(";")) {

            yyValue = GNode.create("FieldDeclaration", v$g$1, v$g$2, v$g$3);
            yyValue.setLocation(location(yyStart));

            return yyResult.createValue(yyValue, yyError);
          } else {
            yyError = yyError.select("';' expected", yyBase);
          }
        }
      }

      // Nested alternative 2.
      { // Start scope for nested choice.

        final int yyChoice2 = yyChoice1;

        // Nested alternative 1.

        yyResult = pResultType(yyChoice2);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$3 = yyResult.semanticValue();

          yyResult = pIdentifier(yyResult.index);
          yyError  = yyResult.select(yyError);
          if (yyResult.hasValue()) {
            final String v$g$4 = yyResult.semanticValue();

            yyResult = pFormalParameters(yyResult.index);
            yyError  = yyResult.select(yyError);
            if (yyResult.hasValue()) {
              final Node v$g$5 = yyResult.semanticValue();

              yyOption1  = yyResult.index;
              yyOpValue1 = null;

              yyResult = pDimensions(yyOption1);
              yyError  = yyResult.select(yyError, yyOption1);
              if (yyResult.hasValue()) {
                final Node v$el$1 = yyResult.semanticValue();

                yyOption1  = yyResult.index;
                yyOpValue1 = v$el$1;
              }
              { // Start scope for v$g$6.
                final Node v$g$6 = cast(yyOpValue1);

                yyOpValue1 = null;

                yyResult = pThrowsClause(yyOption1);
                yyError  = yyResult.select(yyError, yyOption1);
                if (yyResult.hasValue()) {
                  final Node v$el$2 = yyResult.semanticValue();

                  yyOption1  = yyResult.index;
                  yyOpValue1 = v$el$2;
                }
                { // Start scope for v$g$7.
                  final Node v$g$7 = cast(yyOpValue1);

                  final int yyChoice3 = yyOption1;

                  // Nested alternative 1.

                  yyResult = pBlock(yyChoice3);
                  yyError  = yyResult.select(yyError);
                  if (yyResult.hasValue()) {
                    final Node v$g$8 = yyResult.semanticValue();

                    yyValue = GNode.create("MethodDeclaration", v$g$1, null, v$g$3, v$g$4, v$g$5, v$g$6, v$g$7, v$g$8);
                    yyValue.setLocation(location(yyStart));

                    return yyResult.createValue(yyValue, yyError);
                  }

                  // Nested alternative 2.

                  yyBase   = yyChoice3;
                  yyResult = pSymbol(yyBase);
                  if (yyResult.hasValue(";")) {

                    yyValue = GNode.create("MethodDeclaration", v$g$1, null, v$g$3, v$g$4, v$g$5, v$g$6, v$g$7, null);
                    yyValue.setLocation(location(yyStart));

                    return yyResult.createValue(yyValue, yyError);
                  } else {
                    yyError = yyError.select("';' expected", yyBase);
                  }
                } // End scope for v$g$7.
              } // End scope for v$g$6.
            }
          }
        }

        // Nested alternative 2.

        yyResult = pIdentifier(yyChoice2);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final String v$g$3 = yyResult.semanticValue();

          yyResult = pFormalParameters(yyResult.index);
          yyError  = yyResult.select(yyError);
          if (yyResult.hasValue()) {
            final Node v$g$4 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = null;

            yyResult = pThrowsClause(yyOption1);
            yyError  = yyResult.select(yyError, yyOption1);
            if (yyResult.hasValue()) {
              final Node v$el$1 = yyResult.semanticValue();

              yyOption1  = yyResult.index;
              yyOpValue1 = v$el$1;
            }
            { // Start scope for v$g$5.
              final Node v$g$5 = cast(yyOpValue1);

              yyResult = pBlock(yyOption1);
              yyError  = yyResult.select(yyError);
              if (yyResult.hasValue()) {
                final Node v$g$6 = yyResult.semanticValue();

                yyValue = GNode.create("ConstructorDeclaration", v$g$1, null, v$g$3, v$g$4, v$g$5, v$g$6);
                yyValue.setLocation(location(yyStart));

                return yyResult.createValue(yyValue, yyError);
              }
            } // End scope for v$g$5.
          }
        }
      } // End scope for nested choice.

      // Nested alternative 3.

      yyBase   = yyChoice1;
      yyResult = pWord(yyBase);
      if (yyResult.hasValue("class")) {

        yyResult = pIdentifier(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final String v$g$2 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = null;

          yyResult = pExtension(yyOption1);
          yyError  = yyResult.select(yyError, yyOption1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = v$el$1;
          }
          { // Start scope for v$g$4.
            final Node v$g$4 = cast(yyOpValue1);

            yyOpValue1 = null;

            yyResult = pImplementation(yyOption1);
            yyError  = yyResult.select(yyError, yyOption1);
            if (yyResult.hasValue()) {
              final Node v$el$2 = yyResult.semanticValue();

              yyOption1  = yyResult.index;
              yyOpValue1 = v$el$2;
            }
            { // Start scope for v$g$5.
              final Node v$g$5 = cast(yyOpValue1);

              yyResult = pClassBody(yyOption1);
              yyError  = yyResult.select(yyError);
              if (yyResult.hasValue()) {
                final Node v$g$6 = yyResult.semanticValue();

                yyValue = GNode.create("ClassDeclaration", v$g$1, v$g$2, null, v$g$4, v$g$5, v$g$6);
                yyValue.setLocation(location(yyStart));

                return yyResult.createValue(yyValue, yyError);
              }
            } // End scope for v$g$5.
          } // End scope for v$g$4.
        }
      } else {
        yyError = yyError.select("'class' expected", yyBase);
      }

      // Nested alternative 4.

      yyBase   = yyChoice1;
      yyResult = pWord(yyBase);
      if (yyResult.hasValue("interface")) {

        yyResult = pIdentifier(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final String v$g$2 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = null;

          yyResult = pExtension(yyOption1);
          yyError  = yyResult.select(yyError, yyOption1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = v$el$1;
          }
          { // Start scope for v$g$4.
            final Node v$g$4 = cast(yyOpValue1);

            yyResult = pClassBody(yyOption1);
            yyError  = yyResult.select(yyError);
            if (yyResult.hasValue()) {
              final Node v$g$5 = yyResult.semanticValue();

              yyValue = GNode.create("InterfaceDeclaration", v$g$1, v$g$2, null, v$g$4, v$g$5);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            }
          } // End scope for v$g$4.
        }
      } else {
        yyError = yyError.select("'interface' expected", yyBase);
      }
    }

    // Alternative 2.

    yyOption1  = yyStart;
    yyOpValue1 = null;

    yyBase   = yyOption1;
    yyResult = pWord(yyBase);
    if (yyResult.hasValue("static")) {
      final String v$el$1 = "static";

      yyOption1  = yyResult.index;
      yyOpValue1 = v$el$1;
    } else {
      yyError = yyError.select("'static' expected", yyBase);
    }
    { // Start scope for v$g$1.
      final String v$g$1 = cast(yyOpValue1);

      yyResult = pBlock(yyOption1);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyValue = GNode.create("BlockDeclaration", v$g$1, v$g$2);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    } // End scope for v$g$1.

    // Alternative 3.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(";")) {

      yyValue = GNode.create("EmptyDeclaration", false);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("declaration expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ThrowsClause.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pThrowsClause(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyRepetition1;
    Pair<Node> yyRepValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("throws")) {

      yyResult = pQualifiedIdentifier(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyRepetition1 = yyResult.index;
        yyRepValue1   = Pair.empty();
        while (true) {

          yyBase   = yyRepetition1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(",")) {

            yyResult = pQualifiedIdentifier(yyResult.index);
            yyError  = yyResult.select(yyError, yyRepetition1);
            if (yyResult.hasValue()) {
              final Node v$el$1 = yyResult.semanticValue();

              yyRepetition1 = yyResult.index;
              yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
              continue;
            }
          } else {
            yyError = yyError.select("',' expected", yyBase);
          }
          break;
        }
        { // Start scope for v$g$2.
          final Pair<Node> v$g$2 = yyRepValue1.reverse();

          yyValue = GNode.createFromPair("ThrowsClause", v$g$1, v$g$2);
          yyValue.setLocation(location(yyStart));

          return new SemanticValue(yyValue, yyRepetition1, yyError);
        } // End scope for v$g$2.
      }
    }

    // Done.
    yyError = yyError.select("throws clause expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Extension.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pExtension(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyRepetition1;
    Pair<Node> yyRepValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("extends")) {

      yyResult = pType(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyRepetition1 = yyResult.index;
        yyRepValue1   = Pair.empty();
        while (true) {

          yyBase   = yyRepetition1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(",")) {

            yyResult = pType(yyResult.index);
            yyError  = yyResult.select(yyError, yyRepetition1);
            if (yyResult.hasValue()) {
              final Node v$el$1 = yyResult.semanticValue();

              yyRepetition1 = yyResult.index;
              yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
              continue;
            }
          } else {
            yyError = yyError.select("',' expected", yyBase);
          }
          break;
        }
        { // Start scope for v$g$2.
          final Pair<Node> v$g$2 = yyRepValue1.reverse();

          yyValue = GNode.createFromPair("Extension", v$g$1, v$g$2);
          yyValue.setLocation(location(yyStart));

          return new SemanticValue(yyValue, yyRepetition1, yyError);
        } // End scope for v$g$2.
      }
    }

    // Done.
    yyError = yyError.select("extension expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Implementation.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pImplementation(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyRepetition1;
    Pair<Node> yyRepValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("implements")) {

      yyResult = pType(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyRepetition1 = yyResult.index;
        yyRepValue1   = Pair.empty();
        while (true) {

          yyBase   = yyRepetition1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(",")) {

            yyResult = pType(yyResult.index);
            yyError  = yyResult.select(yyError, yyRepetition1);
            if (yyResult.hasValue()) {
              final Node v$el$1 = yyResult.semanticValue();

              yyRepetition1 = yyResult.index;
              yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
              continue;
            }
          } else {
            yyError = yyError.select("',' expected", yyBase);
          }
          break;
        }
        { // Start scope for v$g$2.
          final Pair<Node> v$g$2 = yyRepValue1.reverse();

          yyValue = GNode.createFromPair("Implementation", v$g$1, v$g$2);
          yyValue.setLocation(location(yyStart));

          return new SemanticValue(yyValue, yyRepetition1, yyError);
        } // End scope for v$g$2.
      }
    }

    // Done.
    yyError = yyError.select("implementation expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Block.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pBlock(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk1) yyColumn.chunk1 = new Chunk1();
    if (null == yyColumn.chunk1.fBlock) 
      yyColumn.chunk1.fBlock = pBlock$1(yyStart);
    return yyColumn.chunk1.fBlock;
  }

  /** Actually parse xtc.lang.Java.Block. */
  private Result pBlock$1(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Block>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("{")) {

      yyResult = pBlock$$Star1(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Pair<Node> v$g$1 = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue("}")) {

          yyValue = GNode.createFromPair("Block", v$g$1);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("'}' expected", yyBase);
        }
      }
    }

    // Done.
    yyError = yyError.select("block expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.Block$$Star1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pBlock$$Star1(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk1) yyColumn.chunk1 = new Chunk1();
    if (null == yyColumn.chunk1.fBlock$$Star1) 
      yyColumn.chunk1.fBlock$$Star1 = pBlock$$Star1$1(yyStart);
    return yyColumn.chunk1.fBlock$$Star1;
  }

  /** Actually parse xtc.lang.Java.Block$$Star1. */
  private Result pBlock$$Star1$1(final int yyStart) throws IOException {
    Result     yyResult;
    Pair<Node> yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pDeclarationOrStatement(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$el$1 = yyResult.semanticValue();

      yyResult = pBlock$$Star1(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Pair<Node> v$2 = yyResult.semanticValue();

        yyValue = new Pair<Node>(v$el$1, v$2);

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative 2.

    yyValue = Pair.empty();

    return new SemanticValue(yyValue, yyStart, yyError);
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.DeclarationOrStatement.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pDeclarationOrStatement(final int yyStart) 
    throws IOException {

    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Declaration>.

    yyResult = pInBlockDeclaration(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Statement>.

    yyResult = pStatement(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.InBlockDeclaration.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pInBlockDeclaration(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyOption1;
    Node       yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Variable>.

    yyResult = pVariableDeclaration(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative 2.

    yyResult = pModifiers(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      final int yyChoice1 = yyResult.index;

      // Nested alternative 1.

      yyBase   = yyChoice1;
      yyResult = pWord(yyBase);
      if (yyResult.hasValue("class")) {

        yyResult = pIdentifier(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final String v$g$2 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = null;

          yyResult = pExtension(yyOption1);
          yyError  = yyResult.select(yyError, yyOption1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = v$el$1;
          }
          { // Start scope for v$g$4.
            final Node v$g$4 = yyOpValue1;

            yyOpValue1 = null;

            yyResult = pImplementation(yyOption1);
            yyError  = yyResult.select(yyError, yyOption1);
            if (yyResult.hasValue()) {
              final Node v$el$2 = yyResult.semanticValue();

              yyOption1  = yyResult.index;
              yyOpValue1 = v$el$2;
            }
            { // Start scope for v$g$5.
              final Node v$g$5 = yyOpValue1;

              yyResult = pClassBody(yyOption1);
              yyError  = yyResult.select(yyError);
              if (yyResult.hasValue()) {
                final Node v$g$6 = yyResult.semanticValue();

                yyValue = GNode.create("ClassDeclaration", v$g$1, v$g$2, null, v$g$4, v$g$5, v$g$6);
                yyValue.setLocation(location(yyStart));

                return yyResult.createValue(yyValue, yyError);
              }
            } // End scope for v$g$5.
          } // End scope for v$g$4.
        }
      } else {
        yyError = yyError.select("'class' expected", yyBase);
      }

      // Nested alternative 2.

      yyBase   = yyChoice1;
      yyResult = pWord(yyBase);
      if (yyResult.hasValue("interface")) {

        yyResult = pIdentifier(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final String v$g$2 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = null;

          yyResult = pExtension(yyOption1);
          yyError  = yyResult.select(yyError, yyOption1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = v$el$1;
          }
          { // Start scope for v$g$4.
            final Node v$g$4 = yyOpValue1;

            yyResult = pClassBody(yyOption1);
            yyError  = yyResult.select(yyError);
            if (yyResult.hasValue()) {
              final Node v$g$5 = yyResult.semanticValue();

              yyValue = GNode.create("InterfaceDeclaration", v$g$1, v$g$2, null, v$g$4, v$g$5);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            }
          } // End scope for v$g$4.
        }
      } else {
        yyError = yyError.select("'interface' expected", yyBase);
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.VariableDeclaration.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pVariableDeclaration(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Declaration>.

    yyResult = pVariableModifiers(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyResult = pType(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyResult = pDeclarators(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$3 = yyResult.semanticValue();

          yyBase   = yyResult.index;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(";")) {

            yyValue = GNode.create("FieldDeclaration", v$g$1, v$g$2, v$g$3);
            yyValue.setLocation(location(yyStart));

            return yyResult.createValue(yyValue, yyError);
          } else {
            yyError = yyError.select("';' expected", yyBase);
          }
        }
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Statement.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pStatement(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyRepetition1;
    boolean    yyRepeated1;
    Pair<Node> yyRepValue1;
    int        yyOption1;
    Object     yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Block>.

    yyResult = pBlock(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative 2.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("if")) {

      yyResult = pParExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyResult = pStatement(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$2 = yyResult.semanticValue();

          final int yyChoice1 = yyResult.index;

          // Nested alternative 1.

          yyBase   = yyChoice1;
          yyResult = pWord(yyBase);
          if (yyResult.hasValue("else")) {

            yyResult = pStatement(yyResult.index);
            yyError  = yyResult.select(yyError);
            if (yyResult.hasValue()) {
              final Node v$g$3 = yyResult.semanticValue();

              yyValue = GNode.create("ConditionalStatement", v$g$1, v$g$2, v$g$3);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            }
          } else {
            yyError = yyError.select("'else' expected", yyBase);
          }

          // Nested alternative 2.

          yyValue = GNode.create("ConditionalStatement", v$g$1, v$g$2, null);
          yyValue.setLocation(location(yyStart));

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }
      }
    }

    // Alternative 3.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("for")) {

      yyBase   = yyResult.index;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue("(")) {

        yyResult = pBasicForControl(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$1 = yyResult.semanticValue();

          yyBase   = yyResult.index;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(")")) {

            yyResult = pStatement(yyResult.index);
            yyError  = yyResult.select(yyError);
            if (yyResult.hasValue()) {
              final Node v$g$2 = yyResult.semanticValue();

              yyValue = GNode.create("ForStatement", v$g$1, v$g$2);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            }
          } else {
            yyError = yyError.select("')' expected", yyBase);
          }
        }
      } else {
        yyError = yyError.select("'(' expected", yyBase);
      }
    }

    // Alternative 4.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("while")) {

      yyResult = pParExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyResult = pStatement(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$2 = yyResult.semanticValue();

          yyValue = GNode.create("WhileStatement", v$g$1, v$g$2);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        }
      }
    }

    // Alternative 5.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("do")) {

      yyResult = pStatement(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pWord(yyBase);
        if (yyResult.hasValue("while")) {

          yyResult = pParExpression(yyResult.index);
          yyError  = yyResult.select(yyError);
          if (yyResult.hasValue()) {
            final Node v$g$2 = yyResult.semanticValue();

            yyBase   = yyResult.index;
            yyResult = pSymbol(yyBase);
            if (yyResult.hasValue(";")) {

              yyValue = GNode.create("DoWhileStatement", v$g$1, v$g$2);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            } else {
              yyError = yyError.select("';' expected", yyBase);
            }
          }
        } else {
          yyError = yyError.select("'while' expected", yyBase);
        }
      }
    }

    // Alternative 6.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("try")) {

      yyResult = pBlock(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        final int yyChoice1 = yyResult.index;

        // Nested alternative 1.

        yyRepetition1 = yyChoice1;
        yyRepValue1   = Pair.empty();
        while (true) {

          yyResult = pCatchClause(yyRepetition1);
          yyError  = yyResult.select(yyError, yyRepetition1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyRepetition1 = yyResult.index;
            yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
            continue;
          }
          break;
        }
        { // Start scope for v$g$2.
          final Pair<Node> v$g$2 = yyRepValue1.reverse();

          yyBase   = yyRepetition1;
          yyResult = pWord(yyBase);
          if (yyResult.hasValue("finally")) {

            yyResult = pBlock(yyResult.index);
            yyError  = yyResult.select(yyError);
            if (yyResult.hasValue()) {
              final Node v$g$3 = yyResult.semanticValue();

              yyValue = GNode.create("TryCatchFinallyStatement", v$g$2.size() + 2).
                add(v$g$1).addAll(v$g$2).add(v$g$3);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            }
          } else {
            yyError = yyError.select("'finally' expected", yyBase);
          }
        } // End scope for v$g$2.

        // Nested alternative 2.

        yyRepetition1 = yyChoice1;
        yyRepeated1   = false;
        yyRepValue1   = Pair.empty();
        while (true) {

          yyResult = pCatchClause(yyRepetition1);
          yyError  = yyResult.select(yyError);
          if (yyResult.hasValue()) {
            final Node v$el$2 = yyResult.semanticValue();

            yyRepetition1 = yyResult.index;
            yyRepeated1   = true;
            yyRepValue1   = new Pair<Node>(v$el$2, yyRepValue1);
            continue;
          }
          break;
        }

        if (yyRepeated1) {
          final Pair<Node> v$g$4 = yyRepValue1.reverse();

          yyValue = GNode.create("TryCatchFinallyStatement", v$g$4.size() + 2).
            add(v$g$1).addAll(v$g$4).add(null);
          yyValue.setLocation(location(yyStart));

          return new SemanticValue(yyValue, yyRepetition1, yyError);
        }
      }
    }

    // Alternative 7.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("switch")) {

      yyResult = pParExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue("{")) {

          yyRepetition1 = yyResult.index;
          yyRepValue1   = Pair.empty();
          while (true) {

            yyResult = pSwitchClause(yyRepetition1);
            yyError  = yyResult.select(yyError, yyRepetition1);
            if (yyResult.hasValue()) {
              final Node v$el$1 = yyResult.semanticValue();

              yyRepetition1 = yyResult.index;
              yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
              continue;
            }
            break;
          }
          { // Start scope for v$g$2.
            final Pair<Node> v$g$2 = yyRepValue1.reverse();

            yyBase   = yyRepetition1;
            yyResult = pSymbol(yyBase);
            if (yyResult.hasValue("}")) {

              yyValue = GNode.createFromPair("SwitchStatement", v$g$1, v$g$2);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            } else {
              yyError = yyError.select("'}' expected", yyBase);
            }
          } // End scope for v$g$2.
        } else {
          yyError = yyError.select("'{' expected", yyBase);
        }
      }
    }

    // Alternative 8.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("synchronized")) {

      yyResult = pParExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyResult = pBlock(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$2 = yyResult.semanticValue();

          yyValue = GNode.create("SynchronizedStatement", v$g$1, v$g$2);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        }
      }
    }

    // Alternative 9.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("return")) {

      yyOption1  = yyResult.index;
      yyOpValue1 = null;

      yyResult = pExpression(yyOption1);
      yyError  = yyResult.select(yyError, yyOption1);
      if (yyResult.hasValue()) {
        final Node v$el$1 = yyResult.semanticValue();

        yyOption1  = yyResult.index;
        yyOpValue1 = v$el$1;
      }
      { // Start scope for v$g$1.
        final Node v$g$1 = cast(yyOpValue1);

        yyBase   = yyOption1;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(";")) {

          yyValue = GNode.create("ReturnStatement", v$g$1);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("';' expected", yyBase);
        }
      } // End scope for v$g$1.
    }

    // Alternative 10.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("throw")) {

      yyResult = pExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(";")) {

          yyValue = GNode.create("ThrowStatement", v$g$1);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("';' expected", yyBase);
        }
      }
    }

    // Alternative 11.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("break")) {

      yyOption1  = yyResult.index;
      yyOpValue1 = null;

      yyResult = pIdentifier(yyOption1);
      yyError  = yyResult.select(yyError, yyOption1);
      if (yyResult.hasValue()) {
        final String v$el$1 = yyResult.semanticValue();

        yyOption1  = yyResult.index;
        yyOpValue1 = v$el$1;
      }
      { // Start scope for v$g$1.
        final String v$g$1 = cast(yyOpValue1);

        yyBase   = yyOption1;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(";")) {

          yyValue = GNode.create("BreakStatement", v$g$1);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("';' expected", yyBase);
        }
      } // End scope for v$g$1.
    }

    // Alternative 12.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("continue")) {

      yyOption1  = yyResult.index;
      yyOpValue1 = null;

      yyResult = pIdentifier(yyOption1);
      yyError  = yyResult.select(yyError, yyOption1);
      if (yyResult.hasValue()) {
        final String v$el$1 = yyResult.semanticValue();

        yyOption1  = yyResult.index;
        yyOpValue1 = v$el$1;
      }
      { // Start scope for v$g$1.
        final String v$g$1 = cast(yyOpValue1);

        yyBase   = yyOption1;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(";")) {

          yyValue = GNode.create("ContinueStatement", v$g$1);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("';' expected", yyBase);
        }
      } // End scope for v$g$1.
    }

    // Alternative 13.

    yyResult = pIdentifier(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$1 = yyResult.semanticValue();

      yyBase   = yyResult.index;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue(":")) {

        yyResult = pStatement(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$2 = yyResult.semanticValue();

          yyValue = GNode.create("LabeledStatement", v$g$1, v$g$2);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        }
      } else {
        yyError = yyError.select("':' expected", yyBase);
      }
    }

    // Alternative 14.

    yyResult = pExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyBase   = yyResult.index;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue(";")) {

        yyValue = GNode.create("ExpressionStatement", v$g$1);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      } else {
        yyError = yyError.select("';' expected", yyBase);
      }
    }

    // Alternative 15.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("assert")) {

      yyResult = pExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyOption1  = yyResult.index;
        yyOpValue1 = null;

        yyBase   = yyOption1;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(":")) {

          yyResult = pExpression(yyResult.index);
          yyError  = yyResult.select(yyError, yyOption1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = v$el$1;
          }
        } else {
          yyError = yyError.select("':' expected", yyBase);
        }
        { // Start scope for v$g$2.
          final Node v$g$2 = cast(yyOpValue1);

          yyBase   = yyOption1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(";")) {

            yyValue = GNode.create("AssertStatement", v$g$1, v$g$2);
            yyValue.setLocation(location(yyStart));

            return yyResult.createValue(yyValue, yyError);
          } else {
            yyError = yyError.select("';' expected", yyBase);
          }
        } // End scope for v$g$2.
      }
    }

    // Alternative 16.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(";")) {

      yyValue = GNode.create("EmptyStatement", false);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("statement expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.BasicForControl.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pBasicForControl(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyOption1;
    Node       yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Declaration>.

    yyResult = pVariableModifiers(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyResult = pType(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyResult = pDeclarators(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$3 = yyResult.semanticValue();

          yyBase   = yyResult.index;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(";")) {

            yyOption1  = yyResult.index;
            yyOpValue1 = null;

            yyResult = pExpression(yyOption1);
            yyError  = yyResult.select(yyError, yyOption1);
            if (yyResult.hasValue()) {
              final Node v$el$1 = yyResult.semanticValue();

              yyOption1  = yyResult.index;
              yyOpValue1 = v$el$1;
            }
            { // Start scope for v$g$4.
              final Node v$g$4 = yyOpValue1;

              yyBase   = yyOption1;
              yyResult = pSymbol(yyBase);
              if (yyResult.hasValue(";")) {

                yyOption1  = yyResult.index;
                yyOpValue1 = null;

                yyResult = pExpressionList(yyOption1);
                yyError  = yyResult.select(yyError, yyOption1);
                if (yyResult.hasValue()) {
                  final Node v$el$2 = yyResult.semanticValue();

                  yyOption1  = yyResult.index;
                  yyOpValue1 = v$el$2;
                }
                { // Start scope for v$g$5.
                  final Node v$g$5 = yyOpValue1;

                  yyValue = GNode.create("BasicForControl", v$g$1, v$g$2, v$g$3, v$g$4, v$g$5);
                  yyValue.setLocation(location(yyStart));

                  return new SemanticValue(yyValue, yyOption1, yyError);
                } // End scope for v$g$5.
              } else {
                yyError = yyError.select("';' expected", yyBase);
              }
            } // End scope for v$g$4.
          } else {
            yyError = yyError.select("';' expected", yyBase);
          }
        }
      }
    }

    // Alternative <Initialization>.

    yyOption1  = yyStart;
    yyOpValue1 = null;

    yyResult = pExpressionList(yyOption1);
    yyError  = yyResult.select(yyError, yyOption1);
    if (yyResult.hasValue()) {
      final Node v$el$3 = yyResult.semanticValue();

      yyOption1  = yyResult.index;
      yyOpValue1 = v$el$3;
    }
    { // Start scope for v$g$8.
      final Node v$g$8 = yyOpValue1;

      yyBase   = yyOption1;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue(";")) {

        yyOption1  = yyResult.index;
        yyOpValue1 = null;

        yyResult = pExpression(yyOption1);
        yyError  = yyResult.select(yyError, yyOption1);
        if (yyResult.hasValue()) {
          final Node v$el$4 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = v$el$4;
        }
        { // Start scope for v$g$9.
          final Node v$g$9 = yyOpValue1;

          yyBase   = yyOption1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(";")) {

            yyOption1  = yyResult.index;
            yyOpValue1 = null;

            yyResult = pExpressionList(yyOption1);
            yyError  = yyResult.select(yyError, yyOption1);
            if (yyResult.hasValue()) {
              final Node v$el$5 = yyResult.semanticValue();

              yyOption1  = yyResult.index;
              yyOpValue1 = v$el$5;
            }
            { // Start scope for v$g$10.
              final Node v$g$10 = yyOpValue1;

              yyValue = GNode.create("BasicForControl", null, null, v$g$8, v$g$9, v$g$10);
              yyValue.setLocation(location(yyStart));

              return new SemanticValue(yyValue, yyOption1, yyError);
            } // End scope for v$g$10.
          } else {
            yyError = yyError.select("';' expected", yyBase);
          }
        } // End scope for v$g$9.
      } else {
        yyError = yyError.select("';' expected", yyBase);
      }
    } // End scope for v$g$8.

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ParExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pParExpression(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk1) yyColumn.chunk1 = new Chunk1();
    if (null == yyColumn.chunk1.fParExpression) 
      yyColumn.chunk1.fParExpression = pParExpression$1(yyStart);
    return yyColumn.chunk1.fParExpression;
  }

  /** Actually parse xtc.lang.Java.ParExpression. */
  private Result pParExpression$1(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("(")) {

      yyResult = pExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        yyValue = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(")")) {

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("')' expected", yyBase);
        }
      }
    }

    // Done.
    yyError = yyError.select("par expression expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.CatchClause.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pCatchClause(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk1) yyColumn.chunk1 = new Chunk1();
    if (null == yyColumn.chunk1.fCatchClause) 
      yyColumn.chunk1.fCatchClause = pCatchClause$1(yyStart);
    return yyColumn.chunk1.fCatchClause;
  }

  /** Actually parse xtc.lang.Java.CatchClause. */
  private Result pCatchClause$1(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("catch")) {

      yyBase   = yyResult.index;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue("(")) {

        yyResult = pFormalParameter(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$1 = yyResult.semanticValue();

          yyBase   = yyResult.index;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(")")) {

            yyResult = pBlock(yyResult.index);
            yyError  = yyResult.select(yyError);
            if (yyResult.hasValue()) {
              final Node v$g$2 = yyResult.semanticValue();

              yyValue = GNode.create("CatchClause", v$g$1, v$g$2);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            }
          } else {
            yyError = yyError.select("')' expected", yyBase);
          }
        }
      } else {
        yyError = yyError.select("'(' expected", yyBase);
      }
    }

    // Done.
    yyError = yyError.select("catch clause expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.SwitchClause.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pSwitchClause(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyRepetition1;
    Pair<Node> yyRepValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("case")) {

      yyResult = pExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(":")) {

          yyRepetition1 = yyResult.index;
          yyRepValue1   = Pair.empty();
          while (true) {

            yyResult = pDeclarationOrStatement(yyRepetition1);
            yyError  = yyResult.select(yyError, yyRepetition1);
            if (yyResult.hasValue()) {
              final Node v$el$1 = yyResult.semanticValue();

              yyRepetition1 = yyResult.index;
              yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
              continue;
            }
            break;
          }
          { // Start scope for v$g$2.
            final Pair<Node> v$g$2 = yyRepValue1.reverse();

            yyValue = GNode.createFromPair("CaseClause", v$g$1, v$g$2);
            yyValue.setLocation(location(yyStart));

            return new SemanticValue(yyValue, yyRepetition1, yyError);
          } // End scope for v$g$2.
        } else {
          yyError = yyError.select("':' expected", yyBase);
        }
      }
    }

    // Alternative 2.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("default")) {

      yyBase   = yyResult.index;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue(":")) {

        yyRepetition1 = yyResult.index;
        yyRepValue1   = Pair.empty();
        while (true) {

          yyResult = pDeclarationOrStatement(yyRepetition1);
          yyError  = yyResult.select(yyError, yyRepetition1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyRepetition1 = yyResult.index;
            yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
            continue;
          }
          break;
        }
        { // Start scope for v$g$1.
          final Pair<Node> v$g$1 = yyRepValue1.reverse();

          yyValue = GNode.createFromPair("DefaultClause", v$g$1);
          yyValue.setLocation(location(yyStart));

          return new SemanticValue(yyValue, yyRepetition1, yyError);
        } // End scope for v$g$1.
      } else {
        yyError = yyError.select("':' expected", yyBase);
      }
    }

    // Done.
    yyError = yyError.select("switch clause expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ExpressionList.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pExpressionList(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyRepetition1;
    Pair<Node> yyRepValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyBase   = yyRepetition1;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(",")) {

          yyResult = pExpression(yyResult.index);
          yyError  = yyResult.select(yyError, yyRepetition1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyRepetition1 = yyResult.index;
            yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
            continue;
          }
        } else {
          yyError = yyError.select("',' expected", yyBase);
        }
        break;
      }
      { // Start scope for v$g$2.
        final Pair<Node> v$g$2 = yyRepValue1.reverse();

        yyValue = GNode.createFromPair("ExpressionList", v$g$1, v$g$2);
        yyValue.setLocation(location(yyStart));

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$g$2.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Expression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pExpression(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk1) yyColumn.chunk1 = new Chunk1();
    if (null == yyColumn.chunk1.fExpression) 
      yyColumn.chunk1.fExpression = pExpression$1(yyStart);
    return yyColumn.chunk1.fExpression;
  }

  /** Actually parse xtc.lang.Java.Expression. */
  private Result pExpression$1(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Assignment>.

    yyResult = pConditionalExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyResult = pAssignmentOperator(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final String v$g$2 = yyResult.semanticValue();

        yyResult = pExpression(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$3 = yyResult.semanticValue();

          yyValue = GNode.create("Expression", v$g$1, v$g$2, v$g$3);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        }
      }
    }

    // Alternative <Base>.

    yyResult = pConditionalExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.AssignmentOperator.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pAssignmentOperator(final int yyStart) throws IOException {
    Result     yyResult;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Equal>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("=")) {
      yyValue = "=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <PlusEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("+=")) {
      yyValue = "+=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <MinusEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("-=")) {
      yyValue = "-=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <StarEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("*=")) {
      yyValue = "*=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <SlashEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("/=")) {
      yyValue = "/=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <AmpersandEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("&=")) {
      yyValue = "&=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <BarEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("|=")) {
      yyValue = "|=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <CaretEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("^=")) {
      yyValue = "^=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <PercentEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("%=")) {
      yyValue = "%=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <DoubleLessEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("<<=")) {
      yyValue = "<<=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <DoubleGreaterEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(">>=")) {
      yyValue = ">>=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <TripleGreaterEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(">>>=")) {
      yyValue = ">>>=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("assignment operator expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ConditionalExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pConditionalExpression(final int yyStart) 
    throws IOException {

    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk2) yyColumn.chunk2 = new Chunk2();
    if (null == yyColumn.chunk2.fConditionalExpression) 
      yyColumn.chunk2.fConditionalExpression = pConditionalExpression$1(yyStart);
    return yyColumn.chunk2.fConditionalExpression;
  }

  /** Actually parse xtc.lang.Java.ConditionalExpression. */
  private Result pConditionalExpression$1(final int yyStart) 
    throws IOException {

    Result     yyResult;
    int        yyBase;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Conditional>.

    yyResult = pLogicalOrExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyBase   = yyResult.index;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue("?")) {

        yyResult = pExpression(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$2 = yyResult.semanticValue();

          yyBase   = yyResult.index;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(":")) {

            yyResult = pConditionalExpression(yyResult.index);
            yyError  = yyResult.select(yyError);
            if (yyResult.hasValue()) {
              final Node v$g$3 = yyResult.semanticValue();

              yyValue = GNode.create("ConditionalExpression", v$g$1, v$g$2, v$g$3);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            }
          } else {
            yyError = yyError.select("':' expected", yyBase);
          }
        }
      } else {
        yyError = yyError.select("'?' expected", yyBase);
      }
    }

    // Alternative <Base>.

    yyResult = pLogicalOrExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.LogicalOrExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pLogicalOrExpression(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk2) yyColumn.chunk2 = new Chunk2();
    if (null == yyColumn.chunk2.fLogicalOrExpression) 
      yyColumn.chunk2.fLogicalOrExpression = pLogicalOrExpression$1(yyStart);
    return yyColumn.chunk2.fLogicalOrExpression;
  }

  /** Actually parse xtc.lang.Java.LogicalOrExpression. */
  private Result pLogicalOrExpression$1(final int yyStart) 
    throws IOException {

    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pLogicalAndExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pLogicalOrExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$3 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$3, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$4.
        final Pair<Action<Node>> v$4 = yyRepValue1.reverse();

        yyValue = apply(v$4, yyValue, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$4.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.LogicalOrExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pLogicalOrExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative <Or>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("||")) {

      yyResult = pLogicalAndExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("LogicalOrExpression", v$1, v$g$2);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    yyError = yyError.select("logical or expression expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.LogicalAndExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pLogicalAndExpression(final int yyStart) throws IOException {
    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pBitwiseOrExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pLogicalAndExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$3 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$3, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$4.
        final Pair<Action<Node>> v$4 = yyRepValue1.reverse();

        yyValue = apply(v$4, yyValue, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$4.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.LogicalAndExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pLogicalAndExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative <And>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("&&")) {

      yyResult = pBitwiseOrExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("LogicalAndExpression", v$1, v$g$2);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    yyError = yyError.select("logical and expression expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.BitwiseOrExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pBitwiseOrExpression(final int yyStart) throws IOException {
    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pBitwiseXorExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pBitwiseOrExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$3 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$3, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$4.
        final Pair<Action<Node>> v$4 = yyRepValue1.reverse();

        yyValue = apply(v$4, yyValue, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$4.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.BitwiseOrExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pBitwiseOrExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative <Or>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("|")) {

      yyResult = pBitwiseXorExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("BitwiseOrExpression", v$1, v$g$2);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    yyError = yyError.select("bitwise or expression expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.BitwiseXorExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pBitwiseXorExpression(final int yyStart) throws IOException {
    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pBitwiseAndExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pBitwiseXorExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$3 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$3, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$4.
        final Pair<Action<Node>> v$4 = yyRepValue1.reverse();

        yyValue = apply(v$4, yyValue, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$4.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.BitwiseXorExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pBitwiseXorExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative <Xor>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("^")) {

      yyResult = pBitwiseAndExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("BitwiseXorExpression", v$1, v$g$2);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    yyError = yyError.select("bitwise xor expression expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.BitwiseAndExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pBitwiseAndExpression(final int yyStart) throws IOException {
    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pEqualityExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pBitwiseAndExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$3 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$3, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$4.
        final Pair<Action<Node>> v$4 = yyRepValue1.reverse();

        yyValue = apply(v$4, yyValue, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$4.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.BitwiseAndExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pBitwiseAndExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative <And>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("&")) {

      yyResult = pEqualityExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("BitwiseAndExpression", v$1, v$g$2);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    yyError = yyError.select("bitwise and expression expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.EqualityExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pEqualityExpression(final int yyStart) throws IOException {
    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pInstanceOfExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pEqualityExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$4 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$4, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$5.
        final Pair<Action<Node>> v$5 = yyRepValue1.reverse();

        yyValue = apply(v$5, yyValue, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$5.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.EqualityExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pEqualityExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative <Recursion>.

    yyResult = pEqualityOperator(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$2 = yyResult.semanticValue();

      yyResult = pInstanceOfExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$3 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("EqualityExpression", v$1, v$g$2, v$g$3);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.EqualityOperator.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pEqualityOperator(final int yyStart) throws IOException {
    Result     yyResult;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Equal>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("==")) {
      yyValue = "==";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <NotEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("!=")) {
      yyValue = "!=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("equality operator expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.InstanceOfExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pInstanceOfExpression(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Instanceof>.

    yyResult = pRelationalExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyBase   = yyResult.index;
      yyResult = pWord(yyBase);
      if (yyResult.hasValue("instanceof")) {

        yyResult = pType(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$2 = yyResult.semanticValue();

          yyValue = GNode.create("InstanceOfExpression", v$g$1, v$g$2);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        }
      } else {
        yyError = yyError.select("'instanceof' expected", yyBase);
      }
    }

    // Alternative <Base>.

    yyResult = pRelationalExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.RelationalExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pRelationalExpression(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk2) yyColumn.chunk2 = new Chunk2();
    if (null == yyColumn.chunk2.fRelationalExpression) 
      yyColumn.chunk2.fRelationalExpression = pRelationalExpression$1(yyStart);
    return yyColumn.chunk2.fRelationalExpression;
  }

  /** Actually parse xtc.lang.Java.RelationalExpression. */
  private Result pRelationalExpression$1(final int yyStart) 
    throws IOException {

    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pShiftExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pRelationalExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$4 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$4, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$5.
        final Pair<Action<Node>> v$5 = yyRepValue1.reverse();

        yyValue = apply(v$5, yyValue, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$5.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.RelationalExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pRelationalExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative <Recursion>.

    yyResult = pRelationalOperator(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$2 = yyResult.semanticValue();

      yyResult = pShiftExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$3 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("RelationalExpression", v$1, v$g$2, v$g$3);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.RelationalOperator.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pRelationalOperator(final int yyStart) throws IOException {
    Result     yyResult;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Less>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("<")) {
      yyValue = "<";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Greater>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(">")) {
      yyValue = ">";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <LessEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("<=")) {
      yyValue = "<=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <GreaterEqual>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(">=")) {
      yyValue = ">=";

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("relational operator expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ShiftExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pShiftExpression(final int yyStart) throws IOException {
    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pAdditiveExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pShiftExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$4 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$4, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$5.
        final Pair<Action<Node>> v$5 = yyRepValue1.reverse();

        yyValue = apply(v$5, yyValue, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$5.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.ShiftExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pShiftExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative <Recursion>.

    yyResult = pShiftOperator(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$2 = yyResult.semanticValue();

      yyResult = pAdditiveExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$3 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("ShiftExpression", v$1, v$g$2, v$g$3);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ShiftOperator.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pShiftOperator(final int yyStart) throws IOException {
    Result     yyResult;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Left>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("<<")) {
      yyValue = "<<";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Right>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(">>")) {
      yyValue = ">>";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <UnsignedRight>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(">>>")) {
      yyValue = ">>>";

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("shift operator expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.AdditiveExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pAdditiveExpression(final int yyStart) throws IOException {
    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pMultiplicativeExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pAdditiveExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$4 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$4, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$5.
        final Pair<Action<Node>> v$5 = yyRepValue1.reverse();

        yyValue = apply(v$5, yyValue, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$5.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.AdditiveExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pAdditiveExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative <Recursion>.

    yyResult = pAdditiveOperator(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$2 = yyResult.semanticValue();

      yyResult = pMultiplicativeExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$3 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("AdditiveExpression", v$1, v$g$2, v$g$3);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.AdditiveOperator.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pAdditiveOperator(final int yyStart) throws IOException {
    Result     yyResult;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Plus>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("+")) {
      yyValue = "+";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Minus>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("-")) {
      yyValue = "-";

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("additive operator expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.MultiplicativeExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pMultiplicativeExpression(final int yyStart) 
    throws IOException {

    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pUnaryExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pMultiplicativeExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$4 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$4, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$5.
        final Pair<Action<Node>> v$5 = yyRepValue1.reverse();

        yyValue = apply(v$5, yyValue, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$5.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal 
   * xtc.lang.Java.MultiplicativeExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pMultiplicativeExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative <Times>.

    yyResult = pMultiplicativeOperator(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$2 = yyResult.semanticValue();

      yyResult = pUnaryExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$3 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("MultiplicativeExpression", v$1, v$g$2, v$g$3);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.MultiplicativeOperator.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pMultiplicativeOperator(final int yyStart) 
    throws IOException {

    Result     yyResult;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Times>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("*")) {
      yyValue = "*";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Over>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("/")) {
      yyValue = "/";

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Modulo>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("%")) {
      yyValue = "%";

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("multiplicative operator expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.UnaryExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pUnaryExpression(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Plus>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("+")) {
      final String v$g$1 = "+";

      yyResult = pUnaryExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$2 = yyResult.semanticValue();

        yyValue = GNode.create("UnaryExpression", v$g$1, v$g$2);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative <Minus>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("-")) {
      final String v$g$3 = "-";

      yyResult = pUnaryExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$4 = yyResult.semanticValue();

        yyValue = GNode.create("UnaryExpression", v$g$3, v$g$4);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative <Increment>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("++")) {
      final String v$g$5 = "++";

      yyResult = pUnaryExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$6 = yyResult.semanticValue();

        yyValue = GNode.create("UnaryExpression", v$g$5, v$g$6);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative <Decrement>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("--")) {
      final String v$g$7 = "--";

      yyResult = pUnaryExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$8 = yyResult.semanticValue();

        yyValue = GNode.create("UnaryExpression", v$g$7, v$g$8);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative <Base>.

    yyResult = pUnaryExpressionNotPlusMinus(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("unary expression expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.UnaryExpressionNotPlusMinus.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pUnaryExpressionNotPlusMinus(final int yyStart) 
    throws IOException {

    Result     yyResult;
    int        yyBase;
    int        yyOption1;
    Node       yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("~")) {

      yyResult = pUnaryExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyValue = GNode.create("BitwiseNegationExpression", v$g$1);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative 2.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("!")) {

      yyResult = pUnaryExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyValue = GNode.create("LogicalNegationExpression", v$g$1);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative 3.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("(")) {

      final int yyChoice1 = yyResult.index;

      // Nested alternative 1.

      yyResult = pPrimitiveType(yyChoice1);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyOption1  = yyResult.index;
        yyOpValue1 = null;

        yyResult = pDimensions(yyOption1);
        yyError  = yyResult.select(yyError, yyOption1);
        if (yyResult.hasValue()) {
          final Node v$el$1 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = v$el$1;
        }
        { // Start scope for v$g$2.
          final Node v$g$2 = yyOpValue1;

          yyBase   = yyOption1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(")")) {

            yyResult = pUnaryExpression(yyResult.index);
            yyError  = yyResult.select(yyError);
            if (yyResult.hasValue()) {
              final Node v$g$3 = yyResult.semanticValue();

              yyValue = GNode.create("BasicCastExpression", v$g$1, v$g$2, v$g$3);
              yyValue.setLocation(location(yyStart));

              return yyResult.createValue(yyValue, yyError);
            }
          } else {
            yyError = yyError.select("')' expected", yyBase);
          }
        } // End scope for v$g$2.
      }

      // Nested alternative 2.

      yyResult = pType(yyChoice1);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(")")) {

          yyResult = pUnaryExpressionNotPlusMinus(yyResult.index);
          yyError  = yyResult.select(yyError);
          if (yyResult.hasValue()) {
            final Node v$g$2 = yyResult.semanticValue();

            yyValue = GNode.create("CastExpression", v$g$1, v$g$2);
            yyValue.setLocation(location(yyStart));

            return yyResult.createValue(yyValue, yyError);
          }
        } else {
          yyError = yyError.select("')' expected", yyBase);
        }
      }
    }

    // Alternative <Base>.

    yyResult = pPostfixExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("unary expression not plus minus expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.PostfixExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pPostfixExpression(final int yyStart) throws IOException {
    Result             yyResult;
    int                yyRepetition1;
    Pair<Action<Node>> yyRepValue1;
    Node               yyValue;
    ParseError         yyError = ParseError.DUMMY;

    // Alternative <Base>.

    yyResult = pPrimaryExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$15 = yyResult.semanticValue();

      yyRepetition1 = yyResult.index;
      yyRepValue1   = Pair.empty();
      while (true) {

        yyResult = pPostfixExpression$$Tail1(yyRepetition1);
        yyError  = yyResult.select(yyError, yyRepetition1);
        if (yyResult.hasValue()) {
          final Action<Node> v$16 = yyResult.semanticValue();

          yyRepetition1 = yyResult.index;
          yyRepValue1   = new Pair<Action<Node>>(v$16, yyRepValue1);
          continue;
        }
        break;
      }
      { // Start scope for v$17.
        final Pair<Action<Node>> v$17 = yyRepValue1.reverse();

        yyValue = apply(v$17, v$g$15, yyStart);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      } // End scope for v$17.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.PostfixExpression$$Tail1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pPostfixExpression$$Tail1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    int          yyBase;
    int          yyOption1;
    Node         yyOpValue1;
    Action<Node> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(".")) {

      final int yyChoice1 = yyResult.index;

      // Nested alternative 1.
      { // Start scope for nested choice.

        final int yyChoice2 = yyChoice1;

        // Nested alternative 1.

        yyResult = pIdentifier(yyChoice2);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final String v$g$3 = yyResult.semanticValue();

          yyResult = pArguments(yyResult.index);
          yyError  = yyResult.select(yyError);
          if (yyResult.hasValue()) {
            final Node v$g$4 = yyResult.semanticValue();

            yyValue = new Action<Node>() {
              public Node run(Node v$1) {
                return GNode.create("CallExpression", v$1, null, v$g$3, v$g$4);
              }};

            return yyResult.createValue(yyValue, yyError);
          }
        }

        // Nested alternative 2.

        yyBase   = yyChoice2;
        yyResult = pWord(yyBase);
        if (yyResult.hasValue("super")) {
          final String v$g$5 = "super";

          yyResult = pArguments(yyResult.index);
          yyError  = yyResult.select(yyError);
          if (yyResult.hasValue()) {
            final Node v$g$6 = yyResult.semanticValue();

            yyValue = new Action<Node>() {
              public Node run(Node v$1) {
                return GNode.create("CallExpression", v$1, null, v$g$5, v$g$6);
              }};

            return yyResult.createValue(yyValue, yyError);
          }
        } else {
          yyError = yyError.select("'super' expected", yyBase);
        }
      } // End scope for nested choice.

      // Nested alternative 2.

      yyBase   = yyChoice1;
      yyResult = pWord(yyBase);
      if (yyResult.hasValue("super")) {

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("SuperExpression", v$1);
          }};

        return yyResult.createValue(yyValue, yyError);
      } else {
        yyError = yyError.select("'super' expected", yyBase);
      }

      // Nested alternative 3.

      yyResult = pIdentifier(yyChoice1);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final String v$g$7 = yyResult.semanticValue();

        yyValue = new Action<Node>() {
          public Node run(Node v$1) {
            return GNode.create("SelectionExpression", v$1, v$g$7);
          }};

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative 2.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("[")) {

      yyResult = pExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$8 = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue("]")) {

          yyValue = new Action<Node>() {
            public Node run(Node v$1) {
              return GNode.create("SubscriptExpression", v$1, v$g$8);
            }};

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("']' expected", yyBase);
        }
      }
    }

    // Alternative 3.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("++")) {
      final String v$g$9 = "++";

      yyValue = new Action<Node>() {
        public Node run(Node v$1) {
          return GNode.create("PostfixExpression", v$1, v$g$9);
        }};

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative 4.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("--")) {
      final String v$g$10 = "--";

      yyValue = new Action<Node>() {
        public Node run(Node v$1) {
          return GNode.create("PostfixExpression", v$1, v$g$10);
        }};

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative 5.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(".")) {

      yyBase   = yyResult.index;
      yyResult = pWord(yyBase);
      if (yyResult.hasValue("new")) {

        yyResult = pTypeName(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$12 = yyResult.semanticValue();

          yyResult = pArguments(yyResult.index);
          yyError  = yyResult.select(yyError);
          if (yyResult.hasValue()) {
            final Node v$g$13 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = null;

            yyResult = pClassBody(yyOption1);
            yyError  = yyResult.select(yyError, yyOption1);
            if (yyResult.hasValue()) {
              final Node v$el$1 = yyResult.semanticValue();

              yyOption1  = yyResult.index;
              yyOpValue1 = v$el$1;
            }
            { // Start scope for v$g$14.
              final Node v$g$14 = yyOpValue1;

              yyValue = new Action<Node>() {
                public Node run(Node v$1) {
                  return GNode.create("NewClassExpression", v$1, null, v$g$12, v$g$13, v$g$14);
                }};

              return new SemanticValue(yyValue, yyOption1, yyError);
            } // End scope for v$g$14.
          }
        }
      } else {
        yyError = yyError.select("'new' expected", yyBase);
      }
    }

    // Done.
    yyError = yyError.select("postfix expression expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.PrimaryExpression.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pPrimaryExpression(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyOption1;
    Node       yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Literal>.

    yyResult = pLiteral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Expression>.

    yyResult = pIdentifier(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$3 = yyResult.semanticValue();

      yyResult = pArguments(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$4 = yyResult.semanticValue();

        yyValue = GNode.create("CallExpression", null, null, v$g$3, v$g$4);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative <Expression>.

    yyResult = pResultType(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyBase   = yyResult.index;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue(".")) {

        yyBase   = yyResult.index;
        yyResult = pWord(yyBase);
        if (yyResult.hasValue("class")) {

          yyValue = GNode.create("ClassLiteralExpression", v$g$1);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("'class' expected", yyBase);
        }
      } else {
        yyError = yyError.select("'.' expected", yyBase);
      }
    }

    // Alternative <Expression>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("this")) {
      final String v$g$3 = "this";

      yyResult = pArguments(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$4 = yyResult.semanticValue();

        yyValue = GNode.create("CallExpression", null, null, v$g$3, v$g$4);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative <Expression>.

    yyOption1  = yyStart;
    yyOpValue1 = null;

    yyResult = pQualifiedIdentifier(yyOption1);
    yyError  = yyResult.select(yyError, yyOption1);
    if (yyResult.hasValue()) {
      final Node v$el$1 = yyResult.semanticValue();

      yyBase   = yyResult.index;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue(".")) {

        yyOption1  = yyResult.index;
        yyOpValue1 = v$el$1;
      } else {
        yyError = yyError.select("'.' expected", yyBase);
      }
    }
    { // Start scope for v$g$1.
      final Node v$g$1 = yyOpValue1;

      yyBase   = yyOption1;
      yyResult = pWord(yyBase);
      if (yyResult.hasValue("this")) {

        yyValue = GNode.create("ThisExpression", v$g$1);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      } else {
        yyError = yyError.select("'this' expected", yyBase);
      }
    } // End scope for v$g$1.

    // Alternative 6.
    { // Start scope for nested choice.

      final int yyChoice1 = yyStart;

      // Nested alternative 1.

      yyResult = pWord(yyChoice1);
      if (yyResult.hasValue("super")) {
        final String v$g$3 = "super";

        yyResult = pArguments(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$4 = yyResult.semanticValue();

          yyValue = GNode.create("CallExpression", null, null, v$g$3, v$g$4);
          yyValue.setLocation(location(yyStart));

          return yyResult.createValue(yyValue, yyError);
        }
      }

      // Nested alternative 2.

      yyBase   = yyChoice1;
      yyResult = pWord(yyBase);
      if (yyResult.hasValue("super")) {

        yyValue = GNode.create("SuperExpression", null);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      } else {
        yyError = yyError.select("'super' expected", yyBase);
      }
    } // End scope for nested choice.

    // Alternative 7.

    yyResult = pIdentifier(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$1 = yyResult.semanticValue();

      yyValue = GNode.create("PrimaryIdentifier", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Expression>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("new")) {

      yyResult = pTypeName(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$3 = yyResult.semanticValue();

        yyResult = pArguments(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$4 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = null;

          yyResult = pClassBody(yyOption1);
          yyError  = yyResult.select(yyError, yyOption1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = v$el$1;
          }
          { // Start scope for v$g$5.
            final Node v$g$5 = yyOpValue1;

            yyValue = GNode.create("NewClassExpression", null, null, v$g$3, v$g$4, v$g$5);
            yyValue.setLocation(location(yyStart));

            return new SemanticValue(yyValue, yyOption1, yyError);
          } // End scope for v$g$5.
        }
      }
    }

    // Alternative 9.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("new")) {

      yyResult = pTypeName(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        final int yyChoice1 = yyResult.index;

        // Nested alternative 1.

        yyResult = pConcreteDimensions(yyChoice1);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Node v$g$2 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = null;

          yyResult = pDimensions(yyOption1);
          yyError  = yyResult.select(yyError, yyOption1);
          if (yyResult.hasValue()) {
            final Node v$el$1 = yyResult.semanticValue();

            yyOption1  = yyResult.index;
            yyOpValue1 = v$el$1;
          }
          { // Start scope for v$g$3.
            final Node v$g$3 = yyOpValue1;

            yyValue = GNode.create("NewArrayExpression", v$g$1, v$g$2, v$g$3, null);
            yyValue.setLocation(location(yyStart));

            return new SemanticValue(yyValue, yyOption1, yyError);
          } // End scope for v$g$3.
        }

        // Nested alternative 2.

        yyOption1  = yyChoice1;
        yyOpValue1 = null;

        yyResult = pDimensions(yyOption1);
        yyError  = yyResult.select(yyError, yyOption1);
        if (yyResult.hasValue()) {
          final Node v$el$2 = yyResult.semanticValue();

          yyOption1  = yyResult.index;
          yyOpValue1 = v$el$2;
        }
        { // Start scope for v$g$6.
          final Node v$g$6 = yyOpValue1;

          yyResult = pArrayInitializer(yyOption1);
          yyError  = yyResult.select(yyError);
          if (yyResult.hasValue()) {
            final Node v$g$7 = yyResult.semanticValue();

            yyValue = GNode.create("NewArrayExpression", v$g$1, null, v$g$6, v$g$7);
            yyValue.setLocation(location(yyStart));

            return yyResult.createValue(yyValue, yyError);
          }
        } // End scope for v$g$6.
      }
    }

    // Alternative <Nested>.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("(")) {

      yyResult = pExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        yyValue = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue(")")) {

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("')' expected", yyBase);
        }
      }
    }

    // Done.
    yyError = yyError.select("primary expression expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ConcreteDimensions.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pConcreteDimensions(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyRepetition1;
    boolean    yyRepeated1;
    Pair<Node> yyRepValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyRepetition1 = yyStart;
    yyRepeated1   = false;
    yyRepValue1   = Pair.empty();
    while (true) {

      yyResult = pConcreteDimension(yyRepetition1);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$el$1 = yyResult.semanticValue();

        yyRepetition1 = yyResult.index;
        yyRepeated1   = true;
        yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
        continue;
      }
      break;
    }

    if (yyRepeated1) {
      final Pair<Node> v$g$1 = yyRepValue1.reverse();

      yyValue = GNode.createFromPair("ConcreteDimensions", v$g$1);
      yyValue.setLocation(location(yyStart));

      return new SemanticValue(yyValue, yyRepetition1, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ConcreteDimension.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pConcreteDimension(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("[")) {

      yyResult = pExpression(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        yyValue = yyResult.semanticValue();

        yyBase   = yyResult.index;
        yyResult = pSymbol(yyBase);
        if (yyResult.hasValue("]")) {

          return yyResult.createValue(yyValue, yyError);
        } else {
          yyError = yyError.select("']' expected", yyBase);
        }
      }
    }

    // Done.
    yyError = yyError.select("concrete dimension expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.ArrayInitializer.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pArrayInitializer(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyRepetition1;
    Pair<Node> yyRepValue1;
    int        yyOption1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("{")) {

      final int yyChoice1 = yyResult.index;

      // Nested alternative 1.

      yyResult = pVariableInitializer(yyChoice1);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyRepetition1 = yyResult.index;
        yyRepValue1   = Pair.empty();
        while (true) {

          yyBase   = yyRepetition1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(",")) {

            yyResult = pVariableInitializer(yyResult.index);
            yyError  = yyResult.select(yyError, yyRepetition1);
            if (yyResult.hasValue()) {
              final Node v$el$1 = yyResult.semanticValue();

              yyRepetition1 = yyResult.index;
              yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
              continue;
            }
          } else {
            yyError = yyError.select("',' expected", yyBase);
          }
          break;
        }
        { // Start scope for v$g$2.
          final Pair<Node> v$g$2 = yyRepValue1.reverse();

          yyOption1  = yyRepetition1;

          yyBase   = yyOption1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(",")) {

            yyOption1  = yyResult.index;
          } else {
            yyError = yyError.select("',' expected", yyBase);
          }

          yyBase   = yyOption1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue("}")) {

            yyValue = GNode.createFromPair("ArrayInitializer", v$g$1, v$g$2);
            yyValue.setLocation(location(yyStart));

            return yyResult.createValue(yyValue, yyError);
          } else {
            yyError = yyError.select("'}' expected", yyBase);
          }
        } // End scope for v$g$2.
      }

      // Nested alternative 2.

      yyOption1  = yyChoice1;

      yyBase   = yyOption1;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue(",")) {

        yyOption1  = yyResult.index;
      } else {
        yyError = yyError.select("',' expected", yyBase);
      }

      yyBase   = yyOption1;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue("}")) {

        yyValue = GNode.create("ArrayInitializer", false);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      } else {
        yyError = yyError.select("'}' expected", yyBase);
      }
    }

    // Done.
    yyError = yyError.select("array initializer expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.VariableInitializer.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pVariableInitializer(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk2) yyColumn.chunk2 = new Chunk2();
    if (null == yyColumn.chunk2.fVariableInitializer) 
      yyColumn.chunk2.fVariableInitializer = pVariableInitializer$1(yyStart);
    return yyColumn.chunk2.fVariableInitializer;
  }

  /** Actually parse xtc.lang.Java.VariableInitializer. */
  private Result pVariableInitializer$1(final int yyStart) 
    throws IOException {

    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Array>.

    yyResult = pArrayInitializer(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Expression>.

    yyResult = pExpression(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.Java.Arguments.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pArguments(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyBase;
    int        yyRepetition1;
    Pair<Node> yyRepValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("(")) {

      final int yyChoice1 = yyResult.index;

      // Nested alternative 1.

      yyResult = pExpression(yyChoice1);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Node v$g$1 = yyResult.semanticValue();

        yyRepetition1 = yyResult.index;
        yyRepValue1   = Pair.empty();
        while (true) {

          yyBase   = yyRepetition1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(",")) {

            yyResult = pExpression(yyResult.index);
            yyError  = yyResult.select(yyError, yyRepetition1);
            if (yyResult.hasValue()) {
              final Node v$el$1 = yyResult.semanticValue();

              yyRepetition1 = yyResult.index;
              yyRepValue1   = new Pair<Node>(v$el$1, yyRepValue1);
              continue;
            }
          } else {
            yyError = yyError.select("',' expected", yyBase);
          }
          break;
        }
        { // Start scope for v$g$2.
          final Pair<Node> v$g$2 = yyRepValue1.reverse();

          yyBase   = yyRepetition1;
          yyResult = pSymbol(yyBase);
          if (yyResult.hasValue(")")) {

            yyValue = GNode.createFromPair("Arguments", v$g$1, v$g$2);
            yyValue.setLocation(location(yyStart));

            return yyResult.createValue(yyValue, yyError);
          } else {
            yyError = yyError.select("')' expected", yyBase);
          }
        } // End scope for v$g$2.
      }

      // Nested alternative 2.

      yyBase   = yyChoice1;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue(")")) {

        yyValue = GNode.create("Arguments", false);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      } else {
        yyError = yyError.select("')' expected", yyBase);
      }
    }

    // Done.
    yyError = yyError.select("arguments expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaType.ResultType.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pResultType(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk2) yyColumn.chunk2 = new Chunk2();
    if (null == yyColumn.chunk2.fResultType) 
      yyColumn.chunk2.fResultType = pResultType$1(yyStart);
    return yyColumn.chunk2.fResultType;
  }

  /** Actually parse xtc.lang.JavaType.ResultType. */
  private Result pResultType$1(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Void>.

    yyResult = pVoidType(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Regular>.

    yyResult = pType(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaType.VoidType.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pVoidType(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Void>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("void")) {

      yyValue = GNode.create("VoidType", false);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("void type expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaType.Type.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pType(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk2) yyColumn.chunk2 = new Chunk2();
    if (null == yyColumn.chunk2.fType) 
      yyColumn.chunk2.fType = pType$1(yyStart);
    return yyColumn.chunk2.fType;
  }

  /** Actually parse xtc.lang.JavaType.Type. */
  private Result pType$1(final int yyStart) throws IOException {
    Result     yyResult;
    int        yyOption1;
    Node       yyOpValue1;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Type>.

    yyResult = pTypeName(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Node v$g$1 = yyResult.semanticValue();

      yyOption1  = yyResult.index;
      yyOpValue1 = null;

      yyResult = pDimensions(yyOption1);
      yyError  = yyResult.select(yyError, yyOption1);
      if (yyResult.hasValue()) {
        final Node v$el$1 = yyResult.semanticValue();

        yyOption1  = yyResult.index;
        yyOpValue1 = v$el$1;
      }
      { // Start scope for v$g$2.
        final Node v$g$2 = yyOpValue1;

        yyValue = GNode.create("Type", v$g$1, v$g$2);
        yyValue.setLocation(location(yyStart));

        return new SemanticValue(yyValue, yyOption1, yyError);
      } // End scope for v$g$2.
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaType.TypeName.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pTypeName(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk2) yyColumn.chunk2 = new Chunk2();
    if (null == yyColumn.chunk2.fTypeName) 
      yyColumn.chunk2.fTypeName = pTypeName$1(yyStart);
    return yyColumn.chunk2.fTypeName;
  }

  /** Actually parse xtc.lang.JavaType.TypeName. */
  private Result pTypeName$1(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Basic>.

    yyResult = pPrimitiveType(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Class>.

    yyResult = pQualifiedIdentifier(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaType.PrimitiveType.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pPrimitiveType(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk2) yyColumn.chunk2 = new Chunk2();
    if (null == yyColumn.chunk2.fPrimitiveType) 
      yyColumn.chunk2.fPrimitiveType = pPrimitiveType$1(yyStart);
    return yyColumn.chunk2.fPrimitiveType;
  }

  /** Actually parse xtc.lang.JavaType.PrimitiveType. */
  private Result pPrimitiveType$1(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Byte>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("byte")) {
      final String v$g$1 = "byte";

      yyValue = GNode.create("PrimitiveType", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Short>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("short")) {
      final String v$g$2 = "short";

      yyValue = GNode.create("PrimitiveType", v$g$2);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Char>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("char")) {
      final String v$g$3 = "char";

      yyValue = GNode.create("PrimitiveType", v$g$3);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Int>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("int")) {
      final String v$g$4 = "int";

      yyValue = GNode.create("PrimitiveType", v$g$4);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Long>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("long")) {
      final String v$g$5 = "long";

      yyValue = GNode.create("PrimitiveType", v$g$5);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Float>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("float")) {
      final String v$g$6 = "float";

      yyValue = GNode.create("PrimitiveType", v$g$6);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Double>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("double")) {
      final String v$g$7 = "double";

      yyValue = GNode.create("PrimitiveType", v$g$7);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Boolean>.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("boolean")) {
      final String v$g$8 = "boolean";

      yyValue = GNode.create("PrimitiveType", v$g$8);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("primitive type expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaType.Dimensions.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pDimensions(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk2) yyColumn.chunk2 = new Chunk2();
    if (null == yyColumn.chunk2.fDimensions) 
      yyColumn.chunk2.fDimensions = pDimensions$1(yyStart);
    return yyColumn.chunk2.fDimensions;
  }

  /** Actually parse xtc.lang.JavaType.Dimensions. */
  private Result pDimensions$1(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pDimensions$$Plus1(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final Pair<String> v$g$1 = yyResult.semanticValue();

      yyValue = GNode.createFromPair("Dimensions", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.Dimensions$$Plus1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pDimensions$$Plus1(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk2) yyColumn.chunk2 = new Chunk2();
    if (null == yyColumn.chunk2.fDimensions$$Plus1) 
      yyColumn.chunk2.fDimensions$$Plus1 = pDimensions$$Plus1$1(yyStart);
    return yyColumn.chunk2.fDimensions$$Plus1;
  }

  /** Actually parse xtc.lang.Java.Dimensions$$Plus1. */
  private Result pDimensions$$Plus1$1(final int yyStart) throws IOException {
    Result       yyResult;
    int          yyBase;
    Pair<String> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue("[")) {
      final String v$el$1 = "[";

      yyBase   = yyResult.index;
      yyResult = pSymbol(yyBase);
      if (yyResult.hasValue("]")) {

        final int yyChoice1 = yyResult.index;

        // Nested alternative 1.

        yyResult = pDimensions$$Plus1(yyChoice1);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Pair<String> v$2 = yyResult.semanticValue();

          yyValue = new Pair<String>(v$el$1, v$2);

          return yyResult.createValue(yyValue, yyError);
        }

        // Nested alternative 2.

        yyValue = new Pair<String>(v$el$1);

        return new SemanticValue(yyValue, yyChoice1, yyError);
      } else {
        yyError = yyError.select("']' expected", yyBase);
      }
    }

    // Done.
    yyError = yyError.select("dimensions expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.Literal.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pLiteral(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pFloatingPointLiteral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyResult = pSpacing(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative 2.

    yyResult = pIntegerLiteral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyResult = pSpacing(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative 3.

    yyResult = pCharacterLiteral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyResult = pSpacing(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative 4.

    yyResult = pStringLiteral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyResult = pSpacing(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Alternative 5.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("true")) {
      final String v$g$1 = "true";

      yyValue = GNode.create("BooleanLiteral", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative 6.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("false")) {
      final String v$g$2 = "false";

      yyValue = GNode.create("BooleanLiteral", v$g$2);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative 7.

    yyResult = pWord(yyStart);
    if (yyResult.hasValue("null")) {

      yyValue = GNode.create("NullLiteral", false);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    yyError = yyError.select("literal expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.IntegerLiteral.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pIntegerLiteral(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative <Hex>.

    yyResult = pHexLiteral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$1 = yyResult.semanticValue();

      yyValue = GNode.create("IntegerLiteral", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Octal>.

    yyResult = pOctalLiteral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$2 = yyResult.semanticValue();

      yyValue = GNode.create("IntegerLiteral", v$g$2);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Alternative <Decimal>.

    yyResult = pDecimalLiteral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$3 = yyResult.semanticValue();

      yyValue = GNode.create("IntegerLiteral", v$g$3);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.HexLiteral.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pHexLiteral(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    Result     yyResult;
    int        yyOption1;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pHexNumeral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {

      yyOption1  = yyResult.index;

      yyC = character(yyOption1);
      if (-1 != yyC) {
        yyIndex = yyOption1 + 1;

        switch (yyC) {
        case 'L':
        case 'l':
          {
            yyOption1  = yyIndex;
          }
          break;

        default:
          /* No match. */
        }
      }

      yyValue = difference(yyStart, yyOption1);

      return new SemanticValue(yyValue, yyOption1, yyError);
    }

    // Done.
    yyError = yyError.select("hex literal expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.OctalLiteral.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pOctalLiteral(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    Result     yyResult;
    int        yyOption1;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pOctalNumeral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {

      yyOption1  = yyResult.index;

      yyC = character(yyOption1);
      if (-1 != yyC) {
        yyIndex = yyOption1 + 1;

        switch (yyC) {
        case 'L':
        case 'l':
          {
            yyOption1  = yyIndex;
          }
          break;

        default:
          /* No match. */
        }
      }

      yyValue = difference(yyStart, yyOption1);

      return new SemanticValue(yyValue, yyOption1, yyError);
    }

    // Done.
    yyError = yyError.select("octal literal expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.DecimalLiteral.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pDecimalLiteral(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    Result     yyResult;
    int        yyOption1;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pDecimalNumeral(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {

      yyOption1  = yyResult.index;

      yyC = character(yyOption1);
      if (-1 != yyC) {
        yyIndex = yyOption1 + 1;

        switch (yyC) {
        case 'L':
        case 'l':
          {
            yyOption1  = yyIndex;
          }
          break;

        default:
          /* No match. */
        }
      }

      yyValue = difference(yyStart, yyOption1);

      return new SemanticValue(yyValue, yyOption1, yyError);
    }

    // Done.
    yyError = yyError.select("decimal literal expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.DecimalNumeral.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pDecimalNumeral(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    int        yyRepetition1;
    Void       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyC = character(yyStart);
    if (-1 != yyC) {
      yyIndex = yyStart + 1;

      switch (yyC) {
      case '0':
        {
          yyValue = null;

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case '1':
      case '2':
      case '3':
      case '4':
      case '5':
      case '6':
      case '7':
      case '8':
      case '9':
        {
          yyRepetition1 = yyIndex;
          while (true) {

            yyC = character(yyRepetition1);
            if (-1 != yyC) {
              yyIndex = yyRepetition1 + 1;

              switch (yyC) {
              case '0':
              case '1':
              case '2':
              case '3':
              case '4':
              case '5':
              case '6':
              case '7':
              case '8':
              case '9':
                {
                  yyRepetition1 = yyIndex;
                  continue;
                }

              default:
                /* No match. */
              }
            }
            break;
          }

          yyValue = null;

          return new SemanticValue(yyValue, yyRepetition1, yyError);
        }

      default:
        /* No match. */
      }
    }

    // Done.
    yyError = yyError.select("decimal numeral expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.HexNumeral.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pHexNumeral(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    int        yyRepetition1;
    boolean    yyRepeated1;
    Void       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyC = character(yyStart);
    if ('0' == yyC) {
      yyIndex = yyStart + 1;

      yyC = character(yyIndex);
      if (-1 != yyC) {
        yyIndex = yyIndex + 1;

        switch (yyC) {
        case 'X':
        case 'x':
          {
            yyRepetition1 = yyIndex;
            yyRepeated1   = false;
            while (true) {

              yyC = character(yyRepetition1);
              if (-1 != yyC) {
                yyIndex = yyRepetition1 + 1;

                switch (yyC) {
                case '0':
                case '1':
                case '2':
                case '3':
                case '4':
                case '5':
                case '6':
                case '7':
                case '8':
                case '9':
                case 'A':
                case 'B':
                case 'C':
                case 'D':
                case 'E':
                case 'F':
                case 'a':
                case 'b':
                case 'c':
                case 'd':
                case 'e':
                case 'f':
                  {
                    yyRepetition1 = yyIndex;
                    yyRepeated1   = true;
                    continue;
                  }

                default:
                  /* No match. */
                }
              }
              break;
            }

            if (yyRepeated1) {

              yyValue = null;

              return new SemanticValue(yyValue, yyRepetition1, yyError);
            }
          }
          break;

        default:
          /* No match. */
        }
      }
    }

    // Done.
    yyError = yyError.select("hex numeral expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.OctalNumeral.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pOctalNumeral(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    int        yyRepetition1;
    boolean    yyRepeated1;
    Void       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyC = character(yyStart);
    if ('0' == yyC) {
      yyIndex = yyStart + 1;

      yyRepetition1 = yyIndex;
      yyRepeated1   = false;
      while (true) {

        yyC = character(yyRepetition1);
        if (-1 != yyC) {
          yyIndex = yyRepetition1 + 1;

          switch (yyC) {
          case '0':
          case '1':
          case '2':
          case '3':
          case '4':
          case '5':
          case '6':
          case '7':
            {
              yyRepetition1 = yyIndex;
              yyRepeated1   = true;
              continue;
            }

          default:
            /* No match. */
          }
        }
        break;
      }

      if (yyRepeated1) {

        yyValue = null;

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      }
    }

    // Done.
    yyError = yyError.select("octal numeral expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.FloatingPointLiteral.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pFloatingPointLiteral(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pFloatingPointString(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$1 = yyResult.semanticValue();

      yyValue = GNode.create("FloatingPointLiteral", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.FloatingPointString.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pFloatingPointString(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    Result     yyResult;
    int        yyRepetition1;
    boolean    yyRepeated1;
    int        yyOption1;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyRepetition1 = yyStart;
    yyRepeated1   = false;
    while (true) {

      yyC = character(yyRepetition1);
      if (-1 != yyC) {
        yyIndex = yyRepetition1 + 1;

        switch (yyC) {
        case '0':
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
          {
            yyRepetition1 = yyIndex;
            yyRepeated1   = true;
            continue;
          }

        default:
          /* No match. */
        }
      }
      break;
    }

    if (yyRepeated1) {

      yyC = character(yyRepetition1);
      if ('.' == yyC) {
        yyIndex = yyRepetition1 + 1;

        yyRepetition1 = yyIndex;
        while (true) {

          yyC = character(yyRepetition1);
          if (-1 != yyC) {
            yyIndex = yyRepetition1 + 1;

            switch (yyC) {
            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
              {
                yyRepetition1 = yyIndex;
                continue;
              }

            default:
              /* No match. */
            }
          }
          break;
        }

        yyOption1  = yyRepetition1;

        yyResult = pExponent(yyOption1);
        yyError  = yyResult.select(yyError, yyOption1);
        if (yyResult.hasValue()) {

          yyOption1  = yyResult.index;
        }


        yyC = character(yyOption1);
        if (-1 != yyC) {
          yyIndex = yyOption1 + 1;

          switch (yyC) {
          case 'D':
          case 'F':
          case 'd':
          case 'f':
            {
              yyOption1  = yyIndex;
            }
            break;

          default:
            /* No match. */
          }
        }

        yyValue = difference(yyStart, yyOption1);

        return new SemanticValue(yyValue, yyOption1, yyError);
      }
    }

    // Alternative 2.

    yyC = character(yyStart);
    if ('.' == yyC) {
      yyIndex = yyStart + 1;

      yyRepetition1 = yyIndex;
      yyRepeated1   = false;
      while (true) {

        yyC = character(yyRepetition1);
        if (-1 != yyC) {
          yyIndex = yyRepetition1 + 1;

          switch (yyC) {
          case '0':
          case '1':
          case '2':
          case '3':
          case '4':
          case '5':
          case '6':
          case '7':
          case '8':
          case '9':
            {
              yyRepetition1 = yyIndex;
              yyRepeated1   = true;
              continue;
            }

          default:
            /* No match. */
          }
        }
        break;
      }

      if (yyRepeated1) {

        yyOption1  = yyRepetition1;

        yyResult = pExponent(yyOption1);
        yyError  = yyResult.select(yyError, yyOption1);
        if (yyResult.hasValue()) {

          yyOption1  = yyResult.index;
        }


        yyC = character(yyOption1);
        if (-1 != yyC) {
          yyIndex = yyOption1 + 1;

          switch (yyC) {
          case 'D':
          case 'F':
          case 'd':
          case 'f':
            {
              yyOption1  = yyIndex;
            }
            break;

          default:
            /* No match. */
          }
        }

        yyValue = difference(yyStart, yyOption1);

        return new SemanticValue(yyValue, yyOption1, yyError);
      }
    }

    // Alternative 3.

    yyRepetition1 = yyStart;
    yyRepeated1   = false;
    while (true) {

      yyC = character(yyRepetition1);
      if (-1 != yyC) {
        yyIndex = yyRepetition1 + 1;

        switch (yyC) {
        case '0':
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
          {
            yyRepetition1 = yyIndex;
            yyRepeated1   = true;
            continue;
          }

        default:
          /* No match. */
        }
      }
      break;
    }

    if (yyRepeated1) {

      final int yyChoice1 = yyRepetition1;

      // Nested alternative 1.

      yyResult = pExponent(yyChoice1);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {

        yyOption1  = yyResult.index;

        yyC = character(yyOption1);
        if (-1 != yyC) {
          yyIndex = yyOption1 + 1;

          switch (yyC) {
          case 'D':
          case 'F':
          case 'd':
          case 'f':
            {
              yyOption1  = yyIndex;
            }
            break;

          default:
            /* No match. */
          }
        }

        yyValue = difference(yyStart, yyOption1);

        return new SemanticValue(yyValue, yyOption1, yyError);
      }

      // Nested alternative 2.

      yyOption1  = yyChoice1;

      yyResult = pExponent(yyOption1);
      yyError  = yyResult.select(yyError, yyOption1);
      if (yyResult.hasValue()) {

        yyOption1  = yyResult.index;
      }

      yyC = character(yyOption1);
      if (-1 != yyC) {
        yyIndex = yyOption1 + 1;

        switch (yyC) {
        case 'D':
        case 'F':
        case 'd':
        case 'f':
          {
            yyValue = difference(yyStart, yyIndex);

            return new SemanticValue(yyValue, yyIndex, yyError);
          }

        default:
          /* No match. */
        }
      }
    }

    // Done.
    yyError = yyError.select("floating point string expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.Exponent.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pExponent(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    int        yyRepetition1;
    boolean    yyRepeated1;
    int        yyOption1;
    Void       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyC = character(yyStart);
    if (-1 != yyC) {
      yyIndex = yyStart + 1;

      switch (yyC) {
      case 'E':
      case 'e':
        {
          yyOption1  = yyIndex;

          yyC = character(yyOption1);
          if (-1 != yyC) {
            yyIndex = yyOption1 + 1;

            switch (yyC) {
            case '+':
            case '-':
              {
                yyOption1  = yyIndex;
              }
              break;

            default:
              /* No match. */
            }
          }

          yyRepetition1 = yyOption1;
          yyRepeated1   = false;
          while (true) {

            yyC = character(yyRepetition1);
            if (-1 != yyC) {
              yyIndex = yyRepetition1 + 1;

              switch (yyC) {
              case '0':
              case '1':
              case '2':
              case '3':
              case '4':
              case '5':
              case '6':
              case '7':
              case '8':
              case '9':
                {
                  yyRepetition1 = yyIndex;
                  yyRepeated1   = true;
                  continue;
                }

              default:
                /* No match. */
              }
            }
            break;
          }

          if (yyRepeated1) {

            yyValue = null;

            return new SemanticValue(yyValue, yyRepetition1, yyError);
          }
        }
        break;

      default:
        /* No match. */
      }
    }

    // Done.
    yyError = yyError.select("exponent expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.CharacterLiteral.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pCharacterLiteral(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pCharacterConstant(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$1 = yyResult.semanticValue();

      yyValue = GNode.create("CharacterLiteral", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.StringLiteral.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pStringLiteral(final int yyStart) throws IOException {
    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pStringConstant(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$1 = yyResult.semanticValue();

      yyValue = GNode.create("StringLiteral", v$g$1);
      yyValue.setLocation(location(yyStart));

      return yyResult.createValue(yyValue, yyError);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.CharacterConstant.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pCharacterConstant(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    Result     yyResult;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyC = character(yyStart);
    if ('\'' == yyC) {
      yyIndex = yyStart + 1;

      yyResult = pCharacterConstant$$Choice1(yyIndex);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {

        yyC = character(yyResult.index);
        if ('\'' == yyC) {
          yyIndex = yyResult.index + 1;

          yyValue = difference(yyStart, yyIndex);

          return new SemanticValue(yyValue, yyIndex, yyError);
        }
      }
    }

    // Done.
    yyError = yyError.select("character constant expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.CharacterConstant$$Choice1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pCharacterConstant$$Choice1(final int yyStart) 
    throws IOException {

    int        yyC;
    int        yyIndex;
    Void       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyC = character(yyStart);
    if (-1 != yyC) {
      yyIndex = yyStart + 1;

      switch (yyC) {
      case '\\':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;

            switch (yyC) {
            case '\"':
            case '\'':
            case '\\':
            case 'b':
            case 'f':
            case 'n':
            case 'r':
            case 't':
              {
                yyValue = null;

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            case 'u':
              {
                yyC = character(yyIndex);
                if (-1 != yyC) {
                  yyIndex = yyIndex + 1;

                  switch (yyC) {
                  case '0':
                  case '1':
                  case '2':
                  case '3':
                  case '4':
                  case '5':
                  case '6':
                  case '7':
                  case '8':
                  case '9':
                  case 'A':
                  case 'B':
                  case 'C':
                  case 'D':
                  case 'E':
                  case 'F':
                  case 'a':
                  case 'b':
                  case 'c':
                  case 'd':
                  case 'e':
                  case 'f':
                    {
                      yyC = character(yyIndex);
                      if (-1 != yyC) {
                        yyIndex = yyIndex + 1;

                        switch (yyC) {
                        case '0':
                        case '1':
                        case '2':
                        case '3':
                        case '4':
                        case '5':
                        case '6':
                        case '7':
                        case '8':
                        case '9':
                        case 'A':
                        case 'B':
                        case 'C':
                        case 'D':
                        case 'E':
                        case 'F':
                        case 'a':
                        case 'b':
                        case 'c':
                        case 'd':
                        case 'e':
                        case 'f':
                          {
                            yyC = character(yyIndex);
                            if (-1 != yyC) {
                              yyIndex = yyIndex + 1;

                              switch (yyC) {
                              case '0':
                              case '1':
                              case '2':
                              case '3':
                              case '4':
                              case '5':
                              case '6':
                              case '7':
                              case '8':
                              case '9':
                              case 'A':
                              case 'B':
                              case 'C':
                              case 'D':
                              case 'E':
                              case 'F':
                              case 'a':
                              case 'b':
                              case 'c':
                              case 'd':
                              case 'e':
                              case 'f':
                                {
                                  yyC = character(yyIndex);
                                  if (-1 != yyC) {
                                    yyIndex = yyIndex + 1;

                                    switch (yyC) {
                                    case '0':
                                    case '1':
                                    case '2':
                                    case '3':
                                    case '4':
                                    case '5':
                                    case '6':
                                    case '7':
                                    case '8':
                                    case '9':
                                    case 'A':
                                    case 'B':
                                    case 'C':
                                    case 'D':
                                    case 'E':
                                    case 'F':
                                    case 'a':
                                    case 'b':
                                    case 'c':
                                    case 'd':
                                    case 'e':
                                    case 'f':
                                      {
                                        yyValue = null;

                                        return new SemanticValue(yyValue, yyIndex, yyError);
                                      }

                                    default:
                                      /* No match. */
                                    }
                                  }
                                }
                                break;

                              default:
                                /* No match. */
                              }
                            }
                          }
                          break;

                        default:
                          /* No match. */
                        }
                      }
                    }
                    break;

                  default:
                    /* No match. */
                  }
                }
              }
              break;

            default:
              /* No match. */
            }
          }

          // Nested alternative 2.
          { // Start scope for nested choice.

            final int yyChoice2 = yyChoice1;

            // Nested alternative 1.

            yyC = character(yyChoice2);
            if (-1 != yyC) {
              yyIndex = yyChoice2 + 1;

              switch (yyC) {
              case '0':
              case '1':
              case '2':
              case '3':
                {
                  yyC = character(yyIndex);
                  if (-1 != yyC) {
                    yyIndex = yyIndex + 1;

                    switch (yyC) {
                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                      {
                        yyC = character(yyIndex);
                        if (-1 != yyC) {
                          yyIndex = yyIndex + 1;

                          switch (yyC) {
                          case '0':
                          case '1':
                          case '2':
                          case '3':
                          case '4':
                          case '5':
                          case '6':
                          case '7':
                            {
                              yyValue = null;

                              return new SemanticValue(yyValue, yyIndex, yyError);
                            }

                          default:
                            /* No match. */
                          }
                        }
                      }
                      break;

                    default:
                      /* No match. */
                    }
                  }
                }
                break;

              default:
                /* No match. */
              }
            }

            // Nested alternative 2.

            yyC = character(yyChoice2);
            if (-1 != yyC) {
              yyIndex = yyChoice2 + 1;

              switch (yyC) {
              case '0':
              case '1':
              case '2':
              case '3':
              case '4':
              case '5':
              case '6':
              case '7':
                {
                  final int yyChoice3 = yyIndex;

                  // Nested alternative 1.

                  yyC = character(yyChoice3);
                  if (-1 != yyC) {
                    yyIndex = yyChoice3 + 1;

                    switch (yyC) {
                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                      {
                        yyValue = null;

                        return new SemanticValue(yyValue, yyIndex, yyError);
                      }

                    default:
                      /* No match. */
                    }
                  }

                  // Nested alternative 2.

                  yyValue = null;

                  return new SemanticValue(yyValue, yyChoice3, yyError);
                }

              default:
                /* No match. */
              }
            }
          } // End scope for nested choice.
        }
        break;

      default:
        /* No match. */
      }
    }

    // Alternative 2.

    yyC = character(yyStart);
    if (-1 != yyC) {
      yyIndex = yyStart + 1;

      switch (yyC) {
      case '\'':
      case '\\':
        /* No match. */
        break;

      default:
        {
          yyValue = null;

          return new SemanticValue(yyValue, yyIndex, yyError);
        }
      }
    }

    // Done.
    yyError = yyError.select("character constant expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaConstant.StringConstant.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pStringConstant(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    int        yyRepetition1;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyC = character(yyStart);
    if ('\"' == yyC) {
      yyIndex = yyStart + 1;

      yyRepetition1 = yyIndex;
      while (true) {

        final int yyChoice1 = yyRepetition1;

        // Nested alternative 1.

        yyC = character(yyChoice1);
        if (-1 != yyC) {
          yyIndex = yyChoice1 + 1;

          switch (yyC) {
          case '\\':
            {
              final int yyChoice2 = yyIndex;

              // Nested alternative 1.

              yyC = character(yyChoice2);
              if (-1 != yyC) {
                yyIndex = yyChoice2 + 1;

                switch (yyC) {
                case '\"':
                case '\'':
                case '\\':
                case 'b':
                case 'f':
                case 'n':
                case 'r':
                case 't':
                  {
                    yyRepetition1 = yyIndex;
                    continue;
                  }

                case 'u':
                  {
                    yyC = character(yyIndex);
                    if (-1 != yyC) {
                      yyIndex = yyIndex + 1;

                      switch (yyC) {
                      case '0':
                      case '1':
                      case '2':
                      case '3':
                      case '4':
                      case '5':
                      case '6':
                      case '7':
                      case '8':
                      case '9':
                      case 'A':
                      case 'B':
                      case 'C':
                      case 'D':
                      case 'E':
                      case 'F':
                      case 'a':
                      case 'b':
                      case 'c':
                      case 'd':
                      case 'e':
                      case 'f':
                        {
                          yyC = character(yyIndex);
                          if (-1 != yyC) {
                            yyIndex = yyIndex + 1;

                            switch (yyC) {
                            case '0':
                            case '1':
                            case '2':
                            case '3':
                            case '4':
                            case '5':
                            case '6':
                            case '7':
                            case '8':
                            case '9':
                            case 'A':
                            case 'B':
                            case 'C':
                            case 'D':
                            case 'E':
                            case 'F':
                            case 'a':
                            case 'b':
                            case 'c':
                            case 'd':
                            case 'e':
                            case 'f':
                              {
                                yyC = character(yyIndex);
                                if (-1 != yyC) {
                                  yyIndex = yyIndex + 1;

                                  switch (yyC) {
                                  case '0':
                                  case '1':
                                  case '2':
                                  case '3':
                                  case '4':
                                  case '5':
                                  case '6':
                                  case '7':
                                  case '8':
                                  case '9':
                                  case 'A':
                                  case 'B':
                                  case 'C':
                                  case 'D':
                                  case 'E':
                                  case 'F':
                                  case 'a':
                                  case 'b':
                                  case 'c':
                                  case 'd':
                                  case 'e':
                                  case 'f':
                                    {
                                      yyC = character(yyIndex);
                                      if (-1 != yyC) {
                                        yyIndex = yyIndex + 1;

                                        switch (yyC) {
                                        case '0':
                                        case '1':
                                        case '2':
                                        case '3':
                                        case '4':
                                        case '5':
                                        case '6':
                                        case '7':
                                        case '8':
                                        case '9':
                                        case 'A':
                                        case 'B':
                                        case 'C':
                                        case 'D':
                                        case 'E':
                                        case 'F':
                                        case 'a':
                                        case 'b':
                                        case 'c':
                                        case 'd':
                                        case 'e':
                                        case 'f':
                                          {
                                            yyRepetition1 = yyIndex;
                                            continue;
                                          }

                                        default:
                                          /* No match. */
                                        }
                                      }
                                    }
                                    break;

                                  default:
                                    /* No match. */
                                  }
                                }
                              }
                              break;

                            default:
                              /* No match. */
                            }
                          }
                        }
                        break;

                      default:
                        /* No match. */
                      }
                    }
                  }
                  break;

                default:
                  /* No match. */
                }
              }

              // Nested alternative 2.
              { // Start scope for nested choice.

                final int yyChoice3 = yyChoice2;

                // Nested alternative 1.

                yyC = character(yyChoice3);
                if (-1 != yyC) {
                  yyIndex = yyChoice3 + 1;

                  switch (yyC) {
                  case '0':
                  case '1':
                  case '2':
                  case '3':
                    {
                      yyC = character(yyIndex);
                      if (-1 != yyC) {
                        yyIndex = yyIndex + 1;

                        switch (yyC) {
                        case '0':
                        case '1':
                        case '2':
                        case '3':
                        case '4':
                        case '5':
                        case '6':
                        case '7':
                          {
                            yyC = character(yyIndex);
                            if (-1 != yyC) {
                              yyIndex = yyIndex + 1;

                              switch (yyC) {
                              case '0':
                              case '1':
                              case '2':
                              case '3':
                              case '4':
                              case '5':
                              case '6':
                              case '7':
                                {
                                  yyRepetition1 = yyIndex;
                                  continue;
                                }

                              default:
                                /* No match. */
                              }
                            }
                          }
                          break;

                        default:
                          /* No match. */
                        }
                      }
                    }
                    break;

                  default:
                    /* No match. */
                  }
                }

                // Nested alternative 2.

                yyC = character(yyChoice3);
                if (-1 != yyC) {
                  yyIndex = yyChoice3 + 1;

                  switch (yyC) {
                  case '0':
                  case '1':
                  case '2':
                  case '3':
                  case '4':
                  case '5':
                  case '6':
                  case '7':
                    {
                      final int yyChoice4 = yyIndex;

                      // Nested alternative 1.

                      yyC = character(yyChoice4);
                      if (-1 != yyC) {
                        yyIndex = yyChoice4 + 1;

                        switch (yyC) {
                        case '0':
                        case '1':
                        case '2':
                        case '3':
                        case '4':
                        case '5':
                        case '6':
                        case '7':
                          {
                            yyRepetition1 = yyIndex;
                            continue;
                          }

                        default:
                          /* No match. */
                        }
                      }

                      // Nested alternative 2.

                      yyRepetition1 = yyChoice4;
                      continue;
                    }

                  default:
                    /* No match. */
                  }
                }
              } // End scope for nested choice.
            }
            break;

          default:
            /* No match. */
          }
        }

        // Nested alternative 2.

        yyC = character(yyChoice1);
        if (-1 != yyC) {
          yyIndex = yyChoice1 + 1;

          switch (yyC) {
          case '\"':
          case '\\':
            /* No match. */
            break;

          default:
            {
              yyRepetition1 = yyIndex;
              continue;
            }
          }
        }
        break;
      }

      yyC = character(yyRepetition1);
      if ('\"' == yyC) {
        yyIndex = yyRepetition1 + 1;

        yyValue = difference(yyStart, yyIndex);

        return new SemanticValue(yyValue, yyIndex, yyError);
      }
    }

    // Done.
    yyError = yyError.select("string constant expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaIdentifier.QualifiedIdentifier.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pQualifiedIdentifier(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk3) yyColumn.chunk3 = new Chunk3();
    if (null == yyColumn.chunk3.fQualifiedIdentifier) 
      yyColumn.chunk3.fQualifiedIdentifier = pQualifiedIdentifier$1(yyStart);
    return yyColumn.chunk3.fQualifiedIdentifier;
  }

  /** Actually parse xtc.lang.JavaIdentifier.QualifiedIdentifier. */
  private Result pQualifiedIdentifier$1(final int yyStart) 
    throws IOException {

    Result     yyResult;
    Node       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pIdentifier(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      final String v$g$1 = yyResult.semanticValue();

      yyResult = pQualifiedIdentifier$$Star1(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final Pair<String> v$g$2 = yyResult.semanticValue();

        yyValue = GNode.createFromPair("QualifiedIdentifier", v$g$1, v$g$2);
        yyValue.setLocation(location(yyStart));

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse synthetic nonterminal xtc.lang.Java.QualifiedIdentifier$$Star1.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pQualifiedIdentifier$$Star1(final int yyStart) 
    throws IOException {

    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk3) yyColumn.chunk3 = new Chunk3();
    if (null == yyColumn.chunk3.fQualifiedIdentifier$$Star1) 
      yyColumn.chunk3.fQualifiedIdentifier$$Star1 = pQualifiedIdentifier$$Star1$1(yyStart);
    return yyColumn.chunk3.fQualifiedIdentifier$$Star1;
  }

  /** Actually parse xtc.lang.Java.QualifiedIdentifier$$Star1. */
  private Result pQualifiedIdentifier$$Star1$1(final int yyStart) 
    throws IOException {

    Result       yyResult;
    Pair<String> yyValue;
    ParseError   yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbol(yyStart);
    if (yyResult.hasValue(".")) {

      yyResult = pIdentifier(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {
        final String v$el$1 = yyResult.semanticValue();

        yyResult = pQualifiedIdentifier$$Star1(yyResult.index);
        yyError  = yyResult.select(yyError);
        if (yyResult.hasValue()) {
          final Pair<String> v$2 = yyResult.semanticValue();

          yyValue = new Pair<String>(v$el$1, v$2);

          return yyResult.createValue(yyValue, yyError);
        }
      }
    }

    // Alternative 2.

    yyValue = Pair.empty();

    return new SemanticValue(yyValue, yyStart, yyError);
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaIdentifier.Identifier.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pIdentifier(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk3) yyColumn.chunk3 = new Chunk3();
    if (null == yyColumn.chunk3.fIdentifier) 
      yyColumn.chunk3.fIdentifier = pIdentifier$1(yyStart);
    return yyColumn.chunk3.fIdentifier;
  }

  /** Actually parse xtc.lang.JavaIdentifier.Identifier. */
  private Result pIdentifier$1(final int yyStart) throws IOException {
    Result     yyResult;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pWord(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      if (! contains(JAVA_KEYWORDS, toText(yyValue))) {

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    yyError = yyError.select("identifier expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaIdentifier.Word.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pWord(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk3) yyColumn.chunk3 = new Chunk3();
    if (null == yyColumn.chunk3.fWord) 
      yyColumn.chunk3.fWord = pWord$1(yyStart);
    return yyColumn.chunk3.fWord;
  }

  /** Actually parse xtc.lang.JavaIdentifier.Word. */
  private Result pWord$1(final int yyStart) throws IOException {
    Result     yyResult;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pWordCharacters(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyResult = pSpacing(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaIdentifier.WordCharacters.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pWordCharacters(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    int        yyRepetition1;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyC = character(yyStart);
    if (-1 != yyC) {
      yyIndex = yyStart + 1;
      final char start = (char)yyC;

      if (Character.isJavaIdentifierStart(start)) {

        yyRepetition1 = yyIndex;
        while (true) {

          yyC = character(yyRepetition1);
          if (-1 != yyC) {
            yyIndex = yyRepetition1 + 1;
            final char part = (char)yyC;

            if (Character.isJavaIdentifierPart(part)) {

              yyRepetition1 = yyIndex;
              continue;
            }
          }
          break;
        }

        yyValue = difference(yyStart, yyRepetition1);

        return new SemanticValue(yyValue, yyRepetition1, yyError);
      }
    }

    // Done.
    yyError = yyError.select("word characters expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaSymbol.Symbol.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pSymbol(final int yyStart) throws IOException {
    JavaParserColumn yyColumn = (JavaParserColumn)column(yyStart);
    if (null == yyColumn.chunk3) yyColumn.chunk3 = new Chunk3();
    if (null == yyColumn.chunk3.fSymbol) 
      yyColumn.chunk3.fSymbol = pSymbol$1(yyStart);
    return yyColumn.chunk3.fSymbol;
  }

  /** Actually parse xtc.lang.JavaSymbol.Symbol. */
  private Result pSymbol$1(final int yyStart) throws IOException {
    Result     yyResult;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyResult = pSymbolCharacters(yyStart);
    yyError  = yyResult.select(yyError);
    if (yyResult.hasValue()) {
      yyValue = yyResult.semanticValue();

      yyResult = pSpacing(yyResult.index);
      yyError  = yyResult.select(yyError);
      if (yyResult.hasValue()) {

        return yyResult.createValue(yyValue, yyError);
      }
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.lang.JavaSymbol.SymbolCharacters.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pSymbolCharacters(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    String     yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyC = character(yyStart);
    if (-1 != yyC) {
      yyIndex = yyStart + 1;

      switch (yyC) {
      case '>':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;

            switch (yyC) {
            case '>':
              {
                final int yyChoice2 = yyIndex;

                // Nested alternative 1.

                yyC = character(yyChoice2);
                if (-1 != yyC) {
                  yyIndex = yyChoice2 + 1;

                  switch (yyC) {
                  case '>':
                    {
                      final int yyChoice3 = yyIndex;

                      // Nested alternative 1.

                      yyC = character(yyChoice3);
                      if (-1 != yyC) {
                        yyIndex = yyChoice3 + 1;
                        if ('=' == yyC) {

                          yyValue = ">>>=";

                          return new SemanticValue(yyValue, yyIndex, yyError);
                        }
                      }

                      // Nested alternative 2.

                      yyValue = ">>>";

                      return new SemanticValue(yyValue, yyChoice3, yyError);
                    }

                  case '=':
                    {
                      yyValue = ">>=";

                      return new SemanticValue(yyValue, yyIndex, yyError);
                    }

                  default:
                    /* No match. */
                  }
                }

                // Nested alternative 2.

                yyValue = ">>";

                return new SemanticValue(yyValue, yyChoice2, yyError);
              }

            case '=':
              {
                yyValue = ">=";

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            default:
              /* No match. */
            }
          }

          // Nested alternative 2.

          yyValue = ">";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '<':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;

            switch (yyC) {
            case '<':
              {
                final int yyChoice2 = yyIndex;

                // Nested alternative 1.

                yyC = character(yyChoice2);
                if (-1 != yyC) {
                  yyIndex = yyChoice2 + 1;
                  if ('=' == yyC) {

                    yyValue = "<<=";

                    return new SemanticValue(yyValue, yyIndex, yyError);
                  }
                }

                // Nested alternative 2.

                yyValue = "<<";

                return new SemanticValue(yyValue, yyChoice2, yyError);
              }

            case '=':
              {
                yyValue = "<=";

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            default:
              /* No match. */
            }
          }

          // Nested alternative 2.

          yyValue = "<";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '+':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;

            switch (yyC) {
            case '=':
              {
                yyValue = "+=";

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            case '+':
              {
                yyValue = "++";

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            default:
              /* No match. */
            }
          }

          // Nested alternative 2.

          yyValue = "+";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '-':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;

            switch (yyC) {
            case '=':
              {
                yyValue = "-=";

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            case '-':
              {
                yyValue = "--";

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            default:
              /* No match. */
            }
          }

          // Nested alternative 2.

          yyValue = "-";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '*':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;
            if ('=' == yyC) {

              yyValue = "*=";

              return new SemanticValue(yyValue, yyIndex, yyError);
            }
          }

          // Nested alternative 2.

          yyValue = "*";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '/':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;
            if ('=' == yyC) {

              yyValue = "/=";

              return new SemanticValue(yyValue, yyIndex, yyError);
            }
          }

          // Nested alternative 2.

          yyValue = "/";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '%':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;
            if ('=' == yyC) {

              yyValue = "%=";

              return new SemanticValue(yyValue, yyIndex, yyError);
            }
          }

          // Nested alternative 2.

          yyValue = "%";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '&':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;

            switch (yyC) {
            case '=':
              {
                yyValue = "&=";

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            case '&':
              {
                yyValue = "&&";

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            default:
              /* No match. */
            }
          }

          // Nested alternative 2.

          yyValue = "&";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '^':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;
            if ('=' == yyC) {

              yyValue = "^=";

              return new SemanticValue(yyValue, yyIndex, yyError);
            }
          }

          // Nested alternative 2.

          yyValue = "^";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '|':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;

            switch (yyC) {
            case '=':
              {
                yyValue = "|=";

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            case '|':
              {
                yyValue = "||";

                return new SemanticValue(yyValue, yyIndex, yyError);
              }

            default:
              /* No match. */
            }
          }

          // Nested alternative 2.

          yyValue = "|";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '=':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;
            if ('=' == yyC) {

              yyValue = "==";

              return new SemanticValue(yyValue, yyIndex, yyError);
            }
          }

          // Nested alternative 2.

          yyValue = "=";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case '!':
        {
          final int yyChoice1 = yyIndex;

          // Nested alternative 1.

          yyC = character(yyChoice1);
          if (-1 != yyC) {
            yyIndex = yyChoice1 + 1;
            if ('=' == yyC) {

              yyValue = "!=";

              return new SemanticValue(yyValue, yyIndex, yyError);
            }
          }

          // Nested alternative 2.

          yyValue = "!";

          return new SemanticValue(yyValue, yyChoice1, yyError);
        }

      case ';':
        {
          yyValue = ";";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case ':':
        {
          yyValue = ":";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case ',':
        {
          yyValue = ",";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case '.':
        {
          yyValue = ".";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case '{':
        {
          yyValue = "{";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case '}':
        {
          yyValue = "}";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case '(':
        {
          yyValue = "(";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case ')':
        {
          yyValue = ")";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case '[':
        {
          yyValue = "[";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case ']':
        {
          yyValue = "]";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case '~':
        {
          yyValue = "~";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      case '?':
        {
          yyValue = "?";

          return new SemanticValue(yyValue, yyIndex, yyError);
        }

      default:
        /* No match. */
      }
    }

    // Done.
    yyError = yyError.select("symbol characters expected", yyStart);
    return yyError;
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.util.Spacing.Spacing.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pSpacing(final int yyStart) throws IOException {
    int        yyC;
    int        yyIndex;
    Result     yyPredResult;
    boolean    yyPredMatched;
    int        yyBase;
    int        yyRepetition1;
    int        yyRepetition2;
    Void       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyRepetition1 = yyStart;
    while (true) {

      final int yyChoice1 = yyRepetition1;

      // Nested alternative 1.

      yyC = character(yyChoice1);
      if (-1 != yyC) {
        yyIndex = yyChoice1 + 1;

        switch (yyC) {
        case ' ':
          {
            yyRepetition1 = yyIndex;
            continue;
          }

        case '\t':
          {
            yyRepetition1 = yyIndex;
            continue;
          }

        case '\f':
          {
            yyRepetition1 = yyIndex;
            continue;
          }

        case '\r':
          {
            final int yyChoice2 = yyIndex;

            // Nested alternative 1.

            yyC = character(yyChoice2);
            if ('\n' == yyC) {
              yyIndex = yyChoice2 + 1;

              yyRepetition1 = yyIndex;
              continue;
            }

            // Nested alternative 2.

            yyRepetition1 = yyChoice2;
            continue;
          }

        case '\n':
          {
            yyRepetition1 = yyIndex;
            continue;
          }

        case '/':
          {
            yyC = character(yyIndex);
            if (-1 != yyC) {
              yyIndex = yyIndex + 1;

              switch (yyC) {
              case '*':
                {
                  yyRepetition2 = yyIndex;
                  while (true) {

                    final int yyChoice2 = yyRepetition2;

                    // Nested alternative 1.

                    yyC = character(yyChoice2);
                    if (-1 != yyC) {
                      yyIndex = yyChoice2 + 1;

                      switch (yyC) {
                      case '*':
                        {
                          yyPredMatched = false;

                          yyC = character(yyIndex);
                          if ('/' == yyC) {

                            yyPredMatched = true;
                          }

                          if (! yyPredMatched) {

                            yyRepetition2 = yyIndex;
                            continue;
                          } else {
                            yyError = yyError.select("spacing expected", yyStart);
                          }
                        }
                        break;

                      default:
                        {
                          yyRepetition2 = yyIndex;
                          continue;
                        }
                      }
                    }
                    break;
                  }

                  yyBase = yyRepetition2;
                  yyC    = character(yyBase);
                  if ('*' == yyC) {
                    yyIndex = yyRepetition2 + 1;

                    yyC = character(yyIndex);
                    if ('/' == yyC) {
                      yyIndex = yyIndex + 1;

                      yyRepetition1 = yyIndex;
                      continue;
                    } else {
                      yyError = yyError.select("'*/' expected", yyBase);
                    }
                  } else {
                    yyError = yyError.select("'*/' expected", yyBase);
                  }
                }
                break;

              case '/':
                {
                  yyRepetition2 = yyIndex;
                  while (true) {

                    yyC = character(yyRepetition2);
                    if (-1 != yyC) {
                      yyIndex = yyRepetition2 + 1;

                      switch (yyC) {
                      case '\n':
                      case '\r':
                        /* No match. */
                        break;

                      default:
                        {
                          yyRepetition2 = yyIndex;
                          continue;
                        }
                      }
                    }
                    break;
                  }

                  final int yyChoice2 = yyRepetition2;

                  // Nested alternative 1.

                  yyC = character(yyChoice2);
                  if (-1 != yyC) {
                    yyIndex = yyChoice2 + 1;

                    switch (yyC) {
                    case '\r':
                      {
                        final int yyChoice3 = yyIndex;

                        // Nested alternative 1.

                        yyC = character(yyChoice3);
                        if ('\n' == yyC) {
                          yyIndex = yyChoice3 + 1;

                          yyRepetition1 = yyIndex;
                          continue;
                        }

                        // Nested alternative 2.

                        yyRepetition1 = yyChoice3;
                        continue;
                      }

                    case '\n':
                      {
                        yyRepetition1 = yyIndex;
                        continue;
                      }

                    default:
                      /* No match. */
                    }
                  }

                  // Nested alternative 2.

                  yyPredResult = pEndOfFile(yyChoice2);
                  yyError      = yyPredResult.select(yyError);
                  if (yyPredResult.hasValue()) {

                    yyRepetition1 = yyChoice2;
                    continue;
                  }
                }
                break;

              default:
                /* No match. */
              }
            }
          }
          break;

        default:
          /* No match. */
        }
      }
      break;
    }

    yyValue = null;

    return new SemanticValue(yyValue, yyRepetition1, yyError);
  }

  // =========================================================================

  /**
   * Parse nonterminal xtc.util.Spacing.EndOfFile.
   *
   * @param yyStart The index.
   * @return The result.
   * @throws IOException Signals an I/O error.
   */
  private Result pEndOfFile(final int yyStart) throws IOException {
    int        yyC;
    boolean    yyPredMatched;
    Void       yyValue;
    ParseError yyError = ParseError.DUMMY;

    // Alternative 1.

    yyPredMatched = false;

    yyC = character(yyStart);
    if (-1 != yyC) {

      yyPredMatched = true;
    }

    if (! yyPredMatched) {

      yyValue = null;

      return new SemanticValue(yyValue, yyStart, yyError);
    } else {
      yyError = yyError.select("end of file expected", yyStart);
    }

    // Done.
    return yyError;
  }

  // =========================================================================

  static {
    add(JAVA_KEYWORDS, new String[] {
      "abstract",  "continue",  "for",         "new",        "switch",
      "assert",    "default",   "if",          "package",    "synchronized",
      "boolean",   "do",        "goto",        "private",    "this",
      "break",     "double",    "implements",  "protected",  "throw",
      "byte",      "else",      "import",      "public",     "throws",
      "case",                   "instanceof",  "return",     "transient",
      "catch",     "extends",   "int",         "short",      "try",
      "char",      "final",     "interface",   "static",     "void",
      "class",     "finally",   "long",        "strictfp",   "volatile",
      "const",     "float",     "native",      "super",      "while"
    });
  }

  // =========================================================================

  /**
   * Get the specified text.
   *
   * @param s The text.
   * @return The text.
   */
  protected static final String toText(String s) {
    return s;
  }

  // =========================================================================

  /**
   * Add the specified values to the specified set.
   *
   * @param set The set.
   * @param values The new values.
   */
  protected static final <T> void add(Set<T> set, T[] values) {
    for (T v : values) set.add(v);
  }

  /**
   * Check whether the specified set contains the specified value.
   *
   * @param set The set.
   * @param value The value.
   * @return <code>true</code> if the set contains the value.
   */
  protected static final <T> boolean contains(Set<T> set, T value) {
    return set.contains(value);
  }

}
