Re: Reentrant flex & bison

indradeep_saha@rediffmail.com (Indradeep)
14 Apr 2004 00:24:14 -0400

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Re: Reentrant flex & bison indradeep_saha@rediffmail.com (2004-04-14)
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From: indradeep_saha@rediffmail.com (Indradeep)
Newsgroups: comp.compilers
Date: 14 Apr 2004 00:24:14 -0400
Organization: http://groups.google.com
References: 04-03-068
Keywords: yacc, lex, C++
Posted-Date: 14 Apr 2004 00:24:14 EDT

If I get yer question correctly yew would like to make flex and bison
work while writing yer code in c++...


flex with the -+ option generates a c++ class FlexLexer in which yylex
is defined.
but bison thru yyparse() calls yylex()...


to work around this, in yer parser file declare
FlexLexer *lexer = new FlexLexer;
and then define a function


int yylex()
{
return lexer->yylex();
}
this works perfectly well....
bye..




cherico@bonbon.net (cherico) wrote
> I am trying to write a reentrant scanner and parser using
> flex and bison.

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