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List:       antlr-interest
Subject:    [antlr-interest] evaluation of predicates in lexer
From:       parrt () cs ! usfca ! edu (Terence Parr)
Date:       2005-09-25 13:36:14
Message-ID: 53EDA533-8F0A-4F38-92EB-24ED7E9B0937 () cs ! usfca ! edu
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Howdy, added a bunch of stuff on the evaluation of sem preds in the  
lexer for ANTLR v3:

http://www.antlr.org/blog/antlr3/lookahead.tml

Highlights a tough problem in terms of what predicates mean; ANTLR  
only uses predicates when it has insufficient syntactic information.   
The evaluation of predicates seems to conflict with matching the  
longest string.

Ter
--
CS Professor & Grad Director, University of San Francisco
Creator, ANTLR Parser Generator, http://www.antlr.org
Cofounder, http://www.jguru.com

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