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Diffstat (limited to 'antlr-3.4/runtime/ActionScript/project/src/org/antlr/runtime/CharStream.as')
| -rw-r--r-- | antlr-3.4/runtime/ActionScript/project/src/org/antlr/runtime/CharStream.as | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/antlr-3.4/runtime/ActionScript/project/src/org/antlr/runtime/CharStream.as b/antlr-3.4/runtime/ActionScript/project/src/org/antlr/runtime/CharStream.as new file mode 100644 index 0000000..ceca043 --- /dev/null +++ b/antlr-3.4/runtime/ActionScript/project/src/org/antlr/runtime/CharStream.as @@ -0,0 +1,57 @@ +/* + [The "BSD licence"] + Copyright (c) 2005-2006 Terence Parr + 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. +*/ +package org.antlr.runtime { + /** A source of characters for an ANTLR lexer */ + public interface CharStream extends IntStream { + + /** For infinite streams, you don't need this; primarily I'm providing + * a useful interface for action code. Just make sure actions don't + * use this on streams that don't support it. + */ + function substring(start:int, stop:int):String; + + /** Get the ith character of lookahead. This is the same usually as + * LA(i). This will be used for labels in the generated + * lexer code. I'd prefer to return a char here type-wise, but it's + * probably better to be 32-bit clean and be consistent with LA. + */ + function LT(i:int):int; + + /** ANTLR tracks the line information automatically */ + function get line():int; + + /** Because this stream can rewind, we need to be able to reset the line */ + function set line(line:int):void; + + function set charPositionInLine(pos:int):void; + + /** The index of the character relative to the beginning of the line 0..n-1 */ + function get charPositionInLine():int; + } + +}
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