Re: Passing custom parameter to yylex() via yyparse() using YYPARSE_PARAM and YYLEX_PARAM macros [--SOLVED--]

[Jeannot_Langlois]

Jeannot_Langlois wrote:

> Hi there,
>
>
> I am actually working at integrating a custom (i.e. NOT flex-based) 
> lexical scanner written in C with a Bison 1.875c-generated C pure 
> (reentrant) parser.
>
> As the custom lexical scanner will be reading from a socket rather 
> than the standard input (i.e., keyboard or pipe redirection), I need 
> to pass the socket number (int) to yyparse() so it can be then passed 
> to yylex() afterwards.
>
> I found out that earlier versions of Bison permitted the use of the 
> YYPARSE_PARAM and YYLEX_PARAM macros which allowed the yyparse() 
> caller to pass a structure to yyparse() and then to yylex().  
> Unfortunately, these macros now seem disabled in Bison 1.875c.
>
> How can I pass such a parameter to yyparse() and then to yylex() in a 
> similar way in Bison 1.875c now ?
>
> Regards,
Hi there,

Never mind my last message - I found out about the "%parse-param { ... 
}" and "%lex-param { ... }" instructions which  actually do the same 
(and even better/easier) in the latest versions of Bison.


Thanks still,


--
Jeannot Langlois
B. Sc.  Computer Science / B. Sc.  Informatique
jeannot12 AT linuxmail DOT org


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