1package org.antlr.runtime {
2	public class TokenConstants	{
3		public static const EOR_TOKEN_TYPE:int = 1;
4
5		/** imaginary tree navigation type; traverse "get child" link */
6		public static const DOWN:int = 2;
7		/** imaginary tree navigation type; finish with a child list */
8		public static const UP:int = 3;
9
10		public static const MIN_TOKEN_TYPE:int = UP+1;
11
12	    public static const EOF:int = CharStreamConstants.EOF;
13		public static const EOF_TOKEN:Token = new CommonToken(EOF);
14
15		public static const INVALID_TOKEN_TYPE:int = 0;
16		public static const INVALID_TOKEN:Token = new CommonToken(INVALID_TOKEN_TYPE);
17
18		/** In an action, a lexer rule can set token to this SKIP_TOKEN and ANTLR
19		 *  will avoid creating a token for this symbol and try to fetch another.
20		 */
21		public static const SKIP_TOKEN:Token = new CommonToken(INVALID_TOKEN_TYPE);
22
23		/** All tokens go to the parser (unless skip() is called in that rule)
24		 *  on a particular "channel".  The parser tunes to a particular channel
25		 *  so that whitespace etc... can go to the parser on a "hidden" channel.
26		 */
27		public static const DEFAULT_CHANNEL:int = 0;
28
29		/** Anything on different channel than DEFAULT_CHANNEL is not parsed
30		 *  by parser.
31		 */
32		public static const HIDDEN_CHANNEL:int = 99;
33
34	}
35}