| /* |
| [The "BSD licence"] |
| Copyright (c) 2005-2007 Kunle Odutola |
| 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. |
| 4. Unless explicitly state otherwise, any contribution intentionally |
| submitted for inclusion in this work to the copyright owner or licensor |
| shall be under the terms and conditions of this license, without any |
| additional terms or conditions. |
| |
| 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 |
| { |
| using System; |
| |
| /// <summary> |
| /// This is the complete state of a stream. |
| /// |
| /// When walking ahead with cyclic DFA for syntactic predicates, we |
| /// need to record the state of the input stream (char index, line, |
| /// etc...) so that we can rewind the state after scanning ahead. |
| /// </summary> |
| public class CharStreamState |
| { |
| /// <summary>Index into the char stream of next lookahead char </summary> |
| internal int p; |
| |
| /// <summary>What line number is the scanner at before processing buffer[p]? </summary> |
| internal int line; |
| |
| /// <summary>What char position 0..n-1 in line is scanner before processing buffer[p]? </summary> |
| internal int charPositionInLine; |
| } |
| } |