/*
 [The "BSD license"]
 Copyright (c) 2005-2009 Terence Parr
 All rights reserved.

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 1. Redistributions of source code must retain the above copyright
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     documentation and/or other materials provided with the distribution.
 3. The name of the author may not be used to endorse or promote products
     derived from this software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 */
package org.antlr.runtime;

import org.antlr.runtime.tree.CommonTree;

/** Rules that return more than a single value must return an object
 *  containing all the values.  Besides the properties defined in
 *  RuleLabelScope.predefinedRulePropertiesScope there may be user-defined
 *  return values.  This class simply defines the minimum properties that
 *  are always defined and methods to access the others that might be
 *  available depending on output option such as template and tree.
 *
 *  Note text is not an actual property of the return value, it is computed
 *  from start and stop using the input stream's toString() method.  I
 *  could add a ctor to this so that we can pass in and store the input
 *  stream, but I'm not sure we want to do that.  It would seem to be undefined
 *  to get the .text property anyway if the rule matches tokens from multiple
 *  input streams.
 *
 *  I do not use getters for fields of objects that are used simply to
 *  group values such as this aggregate.  The getters/setters are there to
 *  satisfy the superclass interface.
 */
public class ParserRuleReturnScope extends RuleReturnScope {
	public Token start, stop;
	public Object getStart() { return start; }
	public Object getStop() { return stop; }

	public Object tree; // only used when output=AST
	public Object getTree() { return tree; }
}