Flex question

"Guido Minnen" <guidomi@cogs.susx.ac.uk>
9 Apr 1999 14:07:18 -0400

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Flex question guidomi@cogs.susx.ac.uk (Guido Minnen) (1999-04-09)
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From: "Guido Minnen" <guidomi@cogs.susx.ac.uk>
Newsgroups: comp.compilers
Date: 9 Apr 1999 14:07:18 -0400
Organization: Compilers Central
Keywords: lex, question, comment

Hello,


I'm trying to extend a lexer written in Flex (v. 2.5.2). (The Flex
description consists of about 1500 rules.) Every time I add a new rule
to my Flex description I get the error message: "flex: input rules are
too complicated (>= 32000 NFA states)"
    I know I can "solve" this problem by collapsing rules through
extending the C actions. Can you tell me whether this is the only Flex
description level solution to this problem?


(I prefer not to change the Flex source code as I would like to
distribute the final Flex description without having to force future
users to recompile Flex.)


Thank you in advance for your help.


Guido


,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cognitive and Computing Sciences
University of Sussex
Falmer, Brighton BN1 9QH
United Kingdom
[Lex does have a few hard-coded limits that you'll run into with
enormous lexers. What does this thing do? 1500 rules is huge. -John]

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