From: bluestorm <bluestorm.dylc@gmail.com>
To: Raphael Proust <raphlalou@gmail.com>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] [Camlp4] Quotation expander with OCaml syntax
Date: Mon, 26 Jul 2010 22:08:31 +0200 [thread overview]
Message-ID: <AANLkTikv=stwHrYxjUz=6V9XGrnvPEpispyBVbE50ogu@mail.gmail.com> (raw)
In-Reply-To: <AANLkTik+uKfg5GtXXUYuDkjiSC6EALxyBfOm+4LxHNok@mail.gmail.com>
On Mon, Jul 26, 2010 at 4:41 PM, Raphael Proust <raphlalou@gmail.com> wrote:
> I'm working on a syntax extension as part of an internship in the
> Ocsigen team. The aim of the syntax extension is to split the code of a web
> application in two separate files: one for the client and one for the
> server. A few transformations are to take place in the process.
Are you sure you need to split the code in two different files ? Could
you not produce only one file, emitting code for both the server and
the client behavior, with two separate entry point (say server_main()
and client_main()) to call from the outside ?
Pros :
- no need to split files (naming issues, location issues, etc.)
- easier to ensure consistency between the two sides (for example, if
you want type information to flow from one side to the other); might
be an important factor if you're doing non-trivial things
Cons :
- possibly less convenient to use
- client has to load the server code as well
> I'm unsure of what is the standard way of doing such a thing in Camlp4. What
> I have in mind is to use the original Ocaml syntax for the quotation expander.
> This would (IIUC) allow me to filter the AST to transform every
> antiquotation found inside the quotation itself.
> I'm not sure this is the ideal way of doing such a thing because of the size
> of the pattern matching in the AST filter.
It seems to me that you would only handle antiquotations in
expressions (or do you have a "client-server communication" meaning
for antiquotations inside other syntaxic constructs such as types or
patterns ?). Matching some cases (in that case, one) in one of the
syntaxic classes is *very* easy and quite elegant thanks to the `map`
and `fold` classes of Camlp4Ast `foldmap` could also be helpful but it
seems it is not generated by default for Camlp4Ast. If you need it
(and I think you'd need it), you can simulate a mapfold by adding a
mutable state variable to a mapper class.
next prev parent reply other threads:[~2010-07-26 20:08 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AANLkTikuoN4H0Hsx74JwW66J9jmtq+usDxtQPpYfSGbd@mail.gmail.com>
2010-07-26 14:41 ` Raphael Proust
2010-07-26 15:13 ` [Caml-list] " Nicolas Pouillard
2010-07-26 15:41 ` Joel Reymont
2010-07-26 16:05 ` Jake Donham
2010-07-26 15:41 ` Raphael Proust
2010-07-26 16:27 ` Nicolas Pouillard
2010-07-26 16:30 ` Jake Donham
2010-07-27 7:57 ` Raphael Proust
2010-07-26 20:08 ` bluestorm [this message]
2010-07-26 20:53 ` Raphael Proust
2010-07-27 13:22 ` Thomas.Gazagnaire
2010-07-27 14:38 ` Raphael Proust
2010-07-27 14:47 ` Vincent Balat
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