xpathparser.java

gcc的组建

				throws java.io.IOException, yyException {
//t    this.yydebug = (jay.yydebug.yyDebug)yydebug;
    return yyparse(yyLex);
  }

  /** initial size and increment of the state/value stack [default 256].
      This is not final so that it can be overwritten outside of invocations
      of yyparse().
    */
  protected int yyMax;

  /** executed at the beginning of a reduce action.
      Used as $$ = yyDefault($1), prior to the user-specified action, if any.
      Can be overwritten to provide deep copy, etc.
      @param first value for $1, or null.
      @return first.
    */
  protected Object yyDefault (Object first) {
    return first;
  }

  /** the generated parser.
      Maintains a state and a value stack, currently with fixed maximum size.
      @param yyLex scanner.
      @return result of the last reduction, if any.
      @throws yyException on irrecoverable parse error.
    */
  public Object yyparse (yyInput yyLex)
				throws java.io.IOException, yyException {
    if (yyMax <= 0) yyMax = 256;			// initial size
    int yyState = 0, yyStates[] = new int[yyMax];	// state stack
    Object yyVal = null, yyVals[] = new Object[yyMax];	// value stack
    int yyToken = -1;					// current input
    int yyErrorFlag = 0;				// #tks to shift

    yyLoop: for (int yyTop = 0;; ++ yyTop) {
      if (yyTop >= yyStates.length) {			// dynamically increase
        int[] i = new int[yyStates.length+yyMax];
        System.arraycopy(yyStates, 0, i, 0, yyStates.length);
        yyStates = i;
        Object[] o = new Object[yyVals.length+yyMax];
        System.arraycopy(yyVals, 0, o, 0, yyVals.length);
        yyVals = o;
      }
      yyStates[yyTop] = yyState;
      yyVals[yyTop] = yyVal;
//t      if (yydebug != null) yydebug.push(yyState, yyVal);

      yyDiscarded: for (;;) {	// discarding a token does not change stack
        int yyN;
        if ((yyN = YyDefRedClass.yyDefRed[yyState]) == 0) {	// else [default] reduce (yyN)
          if (yyToken < 0) {
            yyToken = yyLex.advance() ? yyLex.token() : 0;
//t            if (yydebug != null)
//t              yydebug.lex(yyState, yyToken, yyname(yyToken), yyLex.value());
          }
          if ((yyN = YySindexClass.yySindex[yyState]) != 0 && (yyN += yyToken) >= 0
              && yyN < YyTableClass.yyTable.length && YyCheckClass.yyCheck[yyN] == yyToken) {
//t            if (yydebug != null)
//t              yydebug.shift(yyState, YyTableClass.yyTable[yyN], yyErrorFlag-1);
            yyState = YyTableClass.yyTable[yyN];		// shift to yyN
            yyVal = yyLex.value();
            yyToken = -1;
            if (yyErrorFlag > 0) -- yyErrorFlag;
            continue yyLoop;
          }
          if ((yyN = YyRindexClass.yyRindex[yyState]) != 0 && (yyN += yyToken) >= 0
              && yyN < YyTableClass.yyTable.length && YyCheckClass.yyCheck[yyN] == yyToken)
            yyN = YyTableClass.yyTable[yyN];			// reduce (yyN)
          else
            switch (yyErrorFlag) {
  
            case 0:
              yyerror("syntax error", yyExpecting(yyState));
//t              if (yydebug != null) yydebug.error("syntax error");
  
            case 1: case 2:
              yyErrorFlag = 3;
              do {
                if ((yyN = YySindexClass.yySindex[yyStates[yyTop]]) != 0
                    && (yyN += yyErrorCode) >= 0 && yyN < YyTableClass.yyTable.length
                    && YyCheckClass.yyCheck[yyN] == yyErrorCode) {
//t                  if (yydebug != null)
//t                    yydebug.shift(yyStates[yyTop], YyTableClass.yyTable[yyN], 3);
                  yyState = YyTableClass.yyTable[yyN];
                  yyVal = yyLex.value();
                  continue yyLoop;
                }
//t                if (yydebug != null) yydebug.pop(yyStates[yyTop]);
              } while (-- yyTop >= 0);
//t              if (yydebug != null) yydebug.reject();
              throw new yyException("irrecoverable syntax error");
  
            case 3:
              if (yyToken == 0) {
//t                if (yydebug != null) yydebug.reject();
                throw new yyException("irrecoverable syntax error at end-of-file");
              }
//t              if (yydebug != null)
//t                yydebug.discard(yyState, yyToken, yyname(yyToken),
//t  							yyLex.value());
              yyToken = -1;
              continue yyDiscarded;		// leave stack alone
            }
        }
        int yyV = yyTop + 1-YyLenClass.yyLen[yyN];
//t        if (yydebug != null)
//t          yydebug.reduce(yyState, yyStates[yyV-1], yyN, YyRuleClass.yyRule[yyN], YyLenClass.yyLen[yyN]);
        yyVal = yyDefault(yyV > yyTop ? null : yyVals[yyV]);
        switch (yyN) {
case 4:
					// line 277 "XPathParser.y"
  {
      yyVal = new Root();
    }
  break;
case 5:
					// line 281 "XPathParser.y"
  {
      Steps steps;
      if (yyVals[0+yyTop] instanceof Steps)
        {
          steps = (Steps) yyVals[0+yyTop];
        }
      else
        {
          steps = new Steps();
          steps.path.addFirst(yyVals[0+yyTop]);
        }
      steps.path.addFirst(new Root());
      yyVal = steps;
      /*$$ = new Step(new Root(), (Path) $2);*/
    }
  break;
case 6:
					// line 297 "XPathParser.y"
  {
      Test nt = new NodeTypeTest((short) 0);
      Selector s = new Selector(Selector.DESCENDANT_OR_SELF,
                                Collections.singletonList (nt));
      Steps steps;
      if (yyVals[0+yyTop] instanceof Steps)
        {
          steps = (Steps) yyVals[0+yyTop];
        }
      else
        {
          steps = new Steps();
          steps.path.addFirst(yyVals[0+yyTop]);
        }
      steps.path.addFirst(s);
      steps.path.addFirst(new Root());
      yyVal = steps;
      /*Step step = new Step(s, (Path) $2);*/
      /*$$ = new Step(new Root(), step);*/
    }
  break;
case 8:
					// line 322 "XPathParser.y"
  {
      Steps steps;
      if (yyVals[-2+yyTop] instanceof Steps)
        {
          steps = (Steps) yyVals[-2+yyTop];
        }
      else
        {
          steps = new Steps();
          steps.path.addFirst(yyVals[-2+yyTop]);
        }
      steps.path.addLast(yyVals[0+yyTop]);
      yyVal = steps;
      /*$$ = new Step((Expr) $1, (Path) $3);*/
    }
  break;
case 9:
					// line 338 "XPathParser.y"
  {
      Test nt = new NodeTypeTest((short) 0);
      Selector s = new Selector(Selector.DESCENDANT_OR_SELF,
                                Collections.singletonList (nt));
      Steps steps;
      if (yyVals[-2+yyTop] instanceof Steps)
        {
          steps = (Steps) yyVals[-2+yyTop];
        }
      else
        {
          steps = new Steps();
          steps.path.addFirst(yyVals[-2+yyTop]);
        }
      steps.path.addLast(s);
      steps.path.addLast(yyVals[0+yyTop]);
      yyVal = steps;
      /*Step step = new Step(s, (Path) $3);*/
      /*$$ = new Step((Expr) $1, step);*/
    }
  break;
case 10:
					// line 362 "XPathParser.y"
  {
      yyVal = new Selector (Selector.CHILD, (List) yyVals[0+yyTop]);
    }
  break;
case 11:
					// line 366 "XPathParser.y"
  {
      yyVal = new Selector (Selector.ATTRIBUTE, (List) yyVals[0+yyTop]);
    }
  break;
case 12:
					// line 370 "XPathParser.y"
  {
      yyVal = new Selector (((Integer) yyVals[-2+yyTop]).intValue (), (List) yyVals[0+yyTop]);
    }
  break;
case 13:
					// line 374 "XPathParser.y"
  {
      yyVal = new Selector (Selector.SELF, Collections.EMPTY_LIST);
    }
  break;
case 14:
					// line 378 "XPathParser.y"
  {
      yyVal = new Selector (Selector.PARENT, Collections.EMPTY_LIST);
    }
  break;
case 15:
					// line 385 "XPathParser.y"
  {
      List list = new ArrayList();
      list.add(yyVals[0+yyTop]);
      yyVal = list;
    }
  break;
case 16:
					// line 391 "XPathParser.y"
  {
      List list = (List)yyVals[-1+yyTop];
      list.add(yyVals[0+yyTop]);
      yyVal = list;
    }
  break;
case 17:
					// line 415 "XPathParser.y"
  {
      yyVal = new Integer(Selector.ANCESTOR);
    }
  break;
case 18:
					// line 419 "XPathParser.y"
  {
      yyVal = new Integer(Selector.ANCESTOR_OR_SELF);
    }
  break;
case 19:
					// line 423 "XPathParser.y"
  {
      yyVal = new Integer(Selector.ATTRIBUTE);
    }
  break;
case 20:
					// line 427 "XPathParser.y"
  {
      yyVal = new Integer(Selector.CHILD);
    }
  break;
case 21:
					// line 431 "XPathParser.y"
  {
      yyVal = new Integer(Selector.DESCENDANT);
    }
  break;
case 22:
					// line 435 "XPathParser.y"
  {
      yyVal = new Integer(Selector.DESCENDANT_OR_SELF);
    }
  break;
case 23:
					// line 439 "XPathParser.y"
  {
      yyVal = new Integer(Selector.FOLLOWING);
    }
  break;
case 24:
					// line 443 "XPathParser.y"
  {
      yyVal = new Integer(Selector.FOLLOWING_SIBLING);
    }
  break;
case 25:
					// line 447 "XPathParser.y"
  {
      yyVal = new Integer(Selector.NAMESPACE);
    }
  break;
case 26:
					// line 451 "XPathParser.y"
  {
      yyVal = new Integer(Selector.PARENT);
    }
  break;
case 27:
					// line 455 "XPathParser.y"
  {
      yyVal = new Integer(Selector.PRECEDING);
    }
  break;
case 28:
					// line 459 "XPathParser.y"
  {
      yyVal = new Integer(Selector.PRECEDING_SIBLING);
    }
  break;
case 29:
					// line 463 "XPathParser.y"
  {
      yyVal = new Integer(Selector.SELF);
    }
  break;
case 31:
					// line 472 "XPathParser.y"
  {
      yyVal = new NodeTypeTest(Node.PROCESSING_INSTRUCTION_NODE, (String) yyVals[-1+yyTop]);
    }
  break;
case 32:
					// line 477 "XPathParser.y"
  {
      yyVal = new NodeTypeTest(((Short) yyVals[-1+yyTop]).shortValue());
    }
  break;
case 33:
					// line 484 "XPathParser.y"
  {
      yyVal = new Predicate((Expr) yyVals[-1+yyTop]);
    }
  break;
case 35:
					// line 492 "XPathParser.y"
  {
      yyVal = new ParenthesizedExpr((Expr) yyVals[-1+yyTop]);
    }
  break;
case 36:
					// line 496 "XPathParser.y"
  {
      yyVal = new Constant(yyVals[0+yyTop]);
    }
  break;
case 37:
					// line 500 "XPathParser.y"
  {
      yyVal = new Constant(yyVals[0+yyTop]);
    }
  break;
case 39:
					// line 508 "XPathParser.y"
  {
      yyVal = lookupFunction((String) yyVals[-2+yyTop], Collections.EMPTY_LIST);
    }
  break;
case 40:
					// line 512 "XPathParser.y"
  {