Passing a parameter to yylex thru yyparse

"Gwenakl Lambrouin" <dss-stage1@cincom.com>
29 Apr 1998 22:34:58 -0400

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Passing a parameter to yylex thru yyparse dss-stage1@cincom.com (Gwenakl Lambrouin) (1998-04-29)
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From: "Gwenakl Lambrouin" <dss-stage1@cincom.com>
Newsgroups: comp.compilers
Date: 29 Apr 1998 22:34:58 -0400
Organization: Cincom Systems, Inc., Cincinnati OH
Keywords: lex, question, comment

Hello,


I'm writing a parser using Bison 1.2.4 and Flex 2.5.1.


I'm calling yyparse from a C function, and I'd like to pass a parameter
(void*) to yylex. I want yylex to set up my parameter while scanning. I
don't want the parameter to be global.


So I've got to pass the parameter to yyparse, and then yyparse has to
pass it to yylex.
I don't know if it's possible to do so, without modifying to much the
generated parser. If possible, I'd like to modify only the grammar file.


Thanks for any help.


GwenaŽl Lambrouin
dss-stage1@cincom.com
[Considering the enormous amount of state that lex keeps in static data,
I don't see why one more word of static info is a problem. -John]
--


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