Examples of antlr.collections.impl.BitSet

antlr.collections.impl.BitSet
A BitSet to replace java.util.BitSet. Primary differences are that most set operators return new sets as opposed to oring and anding "in place". Further, a number of operations were added. I cannot contain a BitSet because there is no way to access the internal bits (which I need for speed) and, because it is final, I cannot subclass to add functionality. Consider defining set degree. Without access to the bits, I must call a method n times to test the ith bit...ack! Also seems like or() from util is wrong when size of incoming set is bigger than this.bits.length. @author Terence Parr @author
Pete Wells

    }
    match(RCURLY);
  }
  
  public final  BitSet  charSet() throws RecognitionException, TokenStreamException {
     BitSet b ;
    
    
      b = null;
      BitSet tmpSet = null;
    
    
    b=setBlockElement();
    {
    _loop34:

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    }
    return qidTok;
  }
  
  public final  BitSet  setBlockElement() throws RecognitionException, TokenStreamException {
     BitSet b ;
    
    Token  c1 = null;
    Token  c2 = null;
    
      b = null;
      int rangeMin = 0;
    
    
    c1 = LT(1);
    match(CHAR_LITERAL);
    if ( inputState.guessing==0 ) {
      
          rangeMin = ANTLRLexer.tokenTypeForCharLiteral(c1.getText());
          b = BitSet.of(rangeMin);
        
    }
    {
    switch ( LA(1)) {
    case RANGE:
    {
      match(RANGE);
      c2 = LT(1);
      match(CHAR_LITERAL);
      if ( inputState.guessing==0 ) {
        
              int rangeMax = ANTLRLexer.tokenTypeForCharLiteral(c2.getText());
              if (rangeMax < rangeMin) {
                antlrTool.error("Malformed range line ", getFilename(), c1.getLine(), c1.getColumn());
              }
              for (int i = rangeMin+1; i <= rangeMax; i++) {
                b.add(i);
              }
            
      }
      break;
    }

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   */
  protected void genBitsets( Vector bitsetList, int maxVocabulary ) {
    println("");
    for (int i = 0; i < bitsetList.size(); i++)
    {
      BitSet p = (BitSet)bitsetList.elementAt(i);
      // Ensure that generated BitSet is large enough for vocabulary
      p.growToInclude(maxVocabulary);
            genBitSet(p, i);
        }
    }

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    StringBuffer e = new StringBuffer(100);
    boolean first = true;


    e.append("(");
    for (int i = 1; i <= k; i++) {
      BitSet p = look[i].fset;
      if (!first) {
        e.append(") && (");
      }
      first = false;

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    int depth = alt.lookaheadDepth;
    if ( depth == GrammarAnalyzer.NONDETERMINISTIC ) {
      depth = grammar.maxk;
    }
    for (int i=1; i<=depth && i<=maxDepth; i++) {
      BitSet p = alt.cache[i].fset;
      if (p.degree() != 0) {
        return false;
      }
    }
    return true;
  }

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     * @return The position of the bitset in the list.
     */
    protected int markBitsetForGen(BitSet p) {
        // Is the bitset (or an identical one) already marked for gen?
        for (int i = 0; i < bitsetsUsed.size(); i++) {
            BitSet set = (BitSet)bitsetsUsed.elementAt(i);
            if (p.equals(set)) {
                // Use the identical one already stored
                return i;
            }
        }

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    protected CommonHiddenStreamToken firstHidden = null;


    public TokenStreamHiddenTokenFilter(TokenStream input) {
        super(input);
        hideMask = new BitSet();
    }

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    protected void genBitsets(Vector bitsetList,
                              int maxVocabulary
                              ) {
        println("");
        for (int i = 0; i < bitsetList.size(); i++) {
            BitSet p = (BitSet)bitsetList.elementAt(i);
            // Ensure that generated BitSet is large enough for vocabulary
            p.growToInclude(maxVocabulary);
            genBitSet(p, i);
        }
    }

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        StringBuffer e = new StringBuffer(100);
        boolean first = true;


        e.append("(");
        for (int i = 1; i <= k; i++) {
            BitSet p = look[i].fset;
            if (!first) {
                e.append(") && (");
            }
            first = false;

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        int depth = alt.lookaheadDepth;
        if (depth == GrammarAnalyzer.NONDETERMINISTIC) {
            depth = grammar.maxk;
        }
        for (int i = 1; i <= depth && i <= maxDepth; i++) {
            BitSet p = alt.cache[i].fset;
            if (p.degree() != 0) {
                return false;
            }
        }
        return true;
    }

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