/*
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 Copyright (c) 2005-2009 Terence Parr
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     documentation and/or other materials provided with the distribution.
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     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;

/** 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;
	@Override
	public Object getStart() { return start; }
	@Override
	public Object getStop() { return stop; }

	@Override
	public Object getTree() { return null; }
}
