[Caml-list] parse <tags>

[Caml-list] parse <tags>

[Pietro Abate]

Hi all,
I'm trying to write a simple parser (below) but I've problems parsing tag-like
keywords. Probably this is a problem related with the lexer. does anybody know
a solution that doesn't imply heavy modifications to the (Genlex) lexer ?

p

code:

#load "camlp4o.cma";;

(* this doesn't work and it's what I want *)
open Genlex;;
let s = "<foo>";;
let flexer = make_lexer [s];;
let s' = flexer (Stream.of_string s);;
let parse_input_line = parser
        [< 'Kwd "<foo>" >] -> Printf.printf "bingo !"
;;
parse_input_line s';;

(* this works, but I want < > !! *)
let s = "foo";;
let flexer = make_lexer [s];;
let s' = flexer (Stream.of_string s);;
let parse_input_line = parser
        [< 'Kwd "foo" >] -> Printf.printf "bingo ?"
;;
parse_input_line s';;

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   I just watch what they do. Andrew Carnegie (1835-1919).
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Re: [Caml-list] parse <tags>

[Stefano Zacchiroli]

On Mon, Dec 01, 2003 at 04:55:32PM +1100, Pietro Abate wrote:
> I'm trying to write a simple parser (below) but I've problems parsing
> tag-like keywords. Probably this is a problem related with the lexer.
> does anybody know a solution that doesn't imply heavy modifications to
> the (Genlex) lexer ?

Genlex module parses just the ocaml syntactic categories, tags you're
trying to parse are not one of them.

You can try ulex or the former, I've never looked at the details but I'm
pretty sure it can do what you want since they are used to parse XML
documents.  (See http://www.cduce.org/download.html or the debian
package "ocaml-ulex").

Cheers.

-- 
^Stefano Zacchiroli -- Master in Computer Science @ Uni. Bologna, Italy$
^zack@{cs.unibo.it,debian.org,bononia.it} -- http://www.bononia.it/zack$
^Frequentando il mio maestro mi ero reso conto [.] che la logica poteva$
^servire a molto a condizione di entrarci dentro e poi di uscirne -Adso$

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