Archives of the Caml mailing list > Message from Oliver Bandel

Browse thread

bug in "developing applications with objective caml" (english translation)

Jack Andrews
- Ken Rose
  - Jack Andrews
    - Erik de Castro Lopo
    - Jacques Garrigue
      - Alex Baretta
        
        Jacques Garrigue
      - Oliver Bandel
  - Jack Andrews
    - Erik de Castro Lopo

Date:	-- (:)
From:	Oliver Bandel <oliver@f...>
Subject:	Re: [Caml-list] some comments on ocaml{lex,yacc} from a novice's POV

On Sat, Apr 02, 2005 at 04:38:51PM +0900, Jacques Garrigue wrote:
> From: "Jack Andrews" <effbiae@ivorykite.com>
[...]
> > # calclex.py
> > import lex
> > tokens = ( 'NUMBER', 'PLUS', 'MINUS', 'TIMES', 'DIVIDE', 'LPAREN', 'RPAREN',)
> > t_PLUS    = r'\+'  # in python, the r prefix to a string literal
> > t_MINUS   = r'-'   #  means as-is.  r'\' in python is "\\" in c
> > [snip]
> 
> Interestingly, your example corresponds exactly to the one in the
> ocaml tutorial, where it is solved using stream parsers.
> Stream parsers are a bit more involved than just writing yacc rules,
> but they give you more control on how to combine rules (you can write
> parser combinators.) And they are completely integrated in the
> language using camlp4.

...which lacks adequate documentation... :(

Btw: Is the campl4-tutorial-project growing?

Ciao,
   Oliver