| /* |
| * [The "BSD licence"] |
| * Copyright (c) 2005-2008 Terence Parr |
| * All rights reserved. |
| * |
| * Conversion to C#: |
| * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * 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, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| namespace Antlr.Runtime |
| { |
| public static class TokenChannels |
| { |
| /** <summary> |
| * All tokens go to the parser (unless skip() is called in that rule) |
| * on a particular "channel". The parser tunes to a particular channel |
| * so that whitespace etc... can go to the parser on a "hidden" channel. |
| * </summary> |
| */ |
| public const int Default = 0; |
| |
| /** <summary> |
| * Anything on different channel than DEFAULT_CHANNEL is not parsed |
| * by parser. |
| * </summary> |
| */ |
| public const int Hidden = 99; |
| } |
| |
| public static class TokenTypes |
| { |
| public const int EndOfFile = (int)CharStreamConstants.EndOfFile; |
| public const int Invalid = 0; |
| public const int EndOfRule = 1; |
| /** <summary>imaginary tree navigation type; traverse "get child" link</summary> */ |
| public const int Down = 2; |
| /** <summary>imaginary tree navigation type; finish with a child list</summary> */ |
| public const int Up = 3; |
| public const int Min = Up + 1; |
| } |
| |
| public static class Tokens |
| { |
| public static readonly IToken EndOfFile = Tokens<CommonToken>.EndOfFile; |
| |
| public static readonly IToken Invalid = new CommonToken( TokenTypes.Invalid ); |
| |
| /** <summary> |
| * In an action, a lexer rule can set token to this SKIP_TOKEN and ANTLR |
| * will avoid creating a token for this symbol and try to fetch another. |
| * </summary> |
| */ |
| public static readonly IToken Skip = new CommonToken( TokenTypes.Invalid ); |
| } |
| |
| public static class Tokens<T> |
| where T : IToken, new() |
| { |
| public static readonly T EndOfFile = new T() |
| { |
| Type = TokenTypes.EndOfFile |
| }; |
| |
| public static readonly T Invalid = new T() |
| { |
| Type = TokenTypes.Invalid |
| }; |
| |
| public static readonly T Skip = new T() |
| { |
| Type = TokenTypes.Invalid |
| }; |
| } |
| } |