Re: using the PLT scheme lexer

[Scott Owens <sowens@cs.utah.edu>]

In general, the return value of the lexer is not restricted.  The token
structure is provided for interoperation with a parser, but you are free
to return whatever values you prefer.

Since the lexer generator is a new tool to v200, I would appreciate any
suggestions/feedback on you experience using it.

-Scott Owens

On Thu, 13 Dec 2001, Michael Vanier wrote:

> 
> OK, now that I've found the lexer, here's a simple question.
> 
> I can run the lexer to return a single value of type <struct:token>, but I
> can't figure out how to extract the fields from the struct.  As far as I
> can tell (and I'm a total newbie with the module system), the token struct
> type is defined in collects/parser-tools/private-lex/token.ss.  I can't
> import it directly because it already gets imported when I import the lex
> library.  However, the token accessor functions do not appear to be
> exported.  Does that mean that tokens are an opaque data type?  If I can't
> get the value of the token, the lex module is not usable by me.  I don't
> want or need to use the yacc module.  Sorry for my utter cluelessness.
> 
> Mike
> 
>