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Date: 2010-01-17 (08:24)
From: blue storm <bluestorm.dylc@g...>
Subject: Re: [Caml-list] A syntax extension to simplify List manipulation
Thanks for the release : it's interesting to see syntax extensions in use.
I have a few question/remarks.

1) Are you interested in a camlp4 (>= 3.10) port ?

2) The use of the Extlib module is hardcoded in the syntax extension.
I would find it nicer if you only referred to "List.map" instead of
"Extlib.List.map", and let the user "open Extlib" if he wants to
override the stdlib. That would allow one to use other implementations
of List.
You could also add an option to use "List.map" instead of
"Extlib.List.map", if you want Extlib to be the default.

3) iterate/iteratei use a closing "done" lexeme. I understand that it
was nicer for use in a ;-sequence, but doesn't it somehow break the
homogeneity with the "match .. with" construct ?

4) It could be interesting to parametrize the syntax extension of the
precise collection module used. In my own pa_comprehension [1]
extension, i use "Module : expression" (in you setting that would be
something like "map Array : e with ...") for that purpose. You could
instead choose to make the used module implicit (expand to "map"
instead of "List.map" or "Extlib.List.map"), and let an external
openin-like facility do the job. As I understand an open_in syntax is
going to be included in the mainstream for 3.12, that's probably the
best solution.

 [1] http://git.ocamlcore.org/cgi-bin/gitweb.cgi?p=batteries/batteries.git;a=blob;f=src/syntax/pa_comprehension/README;h=e17aa35b72a54d7db28c5f8b8dcb19ed40df1b68;hb=HEAD