Package org.antlr.runtime3_3_0.tree

Examples of org.antlr.runtime3_3_0.tree.TreeRewriter$fptr

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    public TreeIterator(TreeAdaptor adaptor, Object tree) {
        this.adaptor = adaptor;
        this.tree = tree;
        this.root = tree;
        nodes = new FastQueue();
        down = adaptor.create(Token.DOWN, "DOWN");
        up = adaptor.create(Token.UP, "UP");
        eof = adaptor.create(Token.EOF, "EOF");
    }
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  /** Make stream jump to a new location, saving old location.
   *  Switch back with pop().
   */
  public void push(int index) {
    if ( calls==null ) {
      calls = new IntArray();
    }
    calls.push(p); // save current index
    seek(index);
  }
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    /** Make stream jump to a new location, saving old location.
     *  Switch back with pop().
     */
    public void push(int index) {
        if ( calls==null ) {
            calls = new IntArray();
        }
        calls.push(p); // save current index
        seek(index);
    }
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  Stack callStack = new Stack();
  List hiddenTokens = new ArrayList();
  int backtracking = 0;

  public ParseTreeBuilder(String grammarName) {
    ParseTree root = create("<grammar "+grammarName+">");
    callStack.push(root);
  }
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  /**  What kind of node to create.  You might want to override
   *   so I factored out creation here.
   */
  public ParseTree create(Object payload) {
    return new ParseTree(payload);
  }
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  public void enterDecision(int d, boolean couldBacktrack) { backtracking++; }
  public void exitDecision(int i) { backtracking--; }

  public void enterRule(String filename, String ruleName) {
    if ( backtracking>0 ) return;
    ParseTree parentRuleNode = (ParseTree)callStack.peek();
    ParseTree ruleNode = create(ruleName);
    parentRuleNode.addChild(ruleNode);
    callStack.push(ruleNode);
  }
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    callStack.push(ruleNode);
  }

  public void exitRule(String filename, String ruleName) {
    if ( backtracking>0 ) return;
    ParseTree ruleNode = (ParseTree)callStack.peek();
    if ( ruleNode.getChildCount()==0 ) {
      ruleNode.addChild(epsilonNode());
    }
    callStack.pop();   
  }
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    callStack.pop();   
  }

  public void consumeToken(Token token) {
    if ( backtracking>0 ) return;
    ParseTree ruleNode = (ParseTree)callStack.peek();
    ParseTree elementNode = create(token);
    elementNode.hiddenTokens = this.hiddenTokens;
    this.hiddenTokens = new ArrayList();
    ruleNode.addChild(elementNode);
  }
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    hiddenTokens.add(token);
  }

  public void recognitionException(RecognitionException e) {
    if ( backtracking>0 ) return;
    ParseTree ruleNode = (ParseTree)callStack.peek();
    ParseTree errorNode = create(e);
    ruleNode.addChild(errorNode);
  }
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    if ( input instanceof TokenStream ) {
      return token.getType();
    }
    else if ( input instanceof TreeNodeStream ) {
      TreeNodeStream nodes = (TreeNodeStream)input;
      TreeAdaptor adaptor = nodes.getTreeAdaptor();
      return adaptor.getType(node);
    }
    else {
      return c;
    }
  }
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