13447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein/* 2324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver [The "BSD licence"] 3324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver Copyright (c) 2005-2006 Terence Parr 43447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein All rights reserved. 53447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 63447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein Redistribution and use in source and binary forms, with or without 73447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein modification, are permitted provided that the following conditions 83447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein are met: 93447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 1. Redistributions of source code must retain the above copyright 10324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver notice, this list of conditions and the following disclaimer. 113447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 2. Redistributions in binary form must reproduce the above copyright 12324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver notice, this list of conditions and the following disclaimer in the 13324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver documentation and/or other materials provided with the distribution. 143447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 3. The name of the author may not be used to endorse or promote products 15324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver derived from this software without specific prior written permission. 163447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 173447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 183447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 193447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 203447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 213447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 223447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 233447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 243447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 253447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 263447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver*/ 28324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverpackage org.antlr.runtime { 293447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 30324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /** When walking ahead with cyclic DFA or for syntactic predicates, 31324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * we need to record the state of the input stream (char index, 32324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * line, etc...) so that we can rewind the state after scanning ahead. 33324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 34324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * This is the complete state of a stream. 35324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 36324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public class CharStreamState { 37324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /** Index into the char stream of next lookahead char */ 38324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public var p:int; 393447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 40324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /** What line number is the scanner at before processing buffer[p]? */ 41324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public var line:int; 42324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 43324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /** What char position 0..n-1 in line is scanner before processing buffer[p]? */ 44324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public var charPositionInLine:int; 453447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein } 46324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 47324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver}