coupling LALR with a scanner?

"Armel" <armelasselin@hotmail.com>
Tue, 5 Jul 2011 01:02:22 +0200

          From comp.compilers
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From: "Armel" <armelasselin@hotmail.com>
Newsgroups: comp.compilers
Date: Tue, 5 Jul 2011 01:02:22 +0200
Organization: les newsgroups par Orange
Keywords: parse, lex, question
Posted-Date: 07 Jul 2011 00:03:26 EDT

Hi,


I am exploring the possibility of choosing between several lexers depending
on the current state of an LALR parser (i.e. if a state can accept
productions such as A => A . 'a' b, B => . 'c', then the selected lexer will
accept (at least) 'a' and 'c', for rightmost positions the lookahead symbols
would be acceptable as well)


Is there any literature about this? or example? I searched around for
scannerless/lexerless parsing but could not make my mind.


Regards
Armel Asselin
[The usual approach is to set flex start states in your yacc or bison parser.
-John]


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