Reentrant Flex and Bison

etetz@my-deja.com
3 Jun 2000 17:33:30 -0400

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Reentrant Flex and Bison etetz@my-deja.com (2000-06-03)
Re: Reentrant Flex and Bison rhyde@shoe-size.com (Randall Hyde) (2000-06-06)
Reentrant Flex and Bison richard.lanyon@wadham.oxford.ac.uk (1999-11-16)
Re: Reentrant Flex and Bison perkens@sdm.de (Burkhard Perkens-Golomb) (1999-12-07)
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From: etetz@my-deja.com
Newsgroups: comp.compilers
Date: 3 Jun 2000 17:33:30 -0400
Organization: Deja.com - Before you buy.
Keywords: parse, lex, question, comment

I'm trying to create a reentrant scanner/parser using Flex and Bison
(to create a simple scripting language for a Windows app). Bison has
the %pure_parser directive to support creating a reentrant parser. The
problem with this is it changes the interface to yylex to look like
this:


int yylex (YYSTYPE* yyval);


Flex doesn't seem to have the corresponding support this feature. In
other words, Flex is still going to expect yylex to look like "int yylex
()".


Am I missing something?


Curious,
Eric Tetz
[No, flex doesn't easily make reentrant lexers. -John]




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