Re: ocamlyacc/lex reentrancy

From: skaller (skaller@maxtal.com.au)
Date: Thu Dec 30 1999 - 20:09:39 MET


Francois Rouaix wrote:
>
> I don't use ocamlyacc, but I do have lots of ocamllex lexers that need
> to be reentrant. I don't remember if I've posted that trick to the list
> already, but this is what you can do:
>
> In your opening section of the lexer:
>
> {
> type t = <something to store the data>
>
> let create_data () = .... (* unit -> t *)
>
> }
>
> and then for all rules, use
>
> rule somerule = parse
> | somepattern { (fun lexdata -> action) }
>
> And, when invoking a lexer function or entry point, you need to pass the
> additionnal argument, a in
> somerule lexbuf lexdata

        Ahhhh! Thank you. I see how this works.

-- 
John Skaller, mailto:skaller@maxtal.com.au
10/1 Toxteth Rd Glebe NSW 2037 Australia
homepage: http://www.maxtal.com.au/~skaller
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