[wg-camlp4] Pending issues

[Xavier Clerc]

----- Mail original -----
> On 2/12/2013 9:12 PM, Pierre Chambart wrote:
> > I would also prefer to
> > restrict that kind of annotation to a small subset of the
> > expression
> > language avoiding as much as possible duplication.
> 
> Just to be clear, do you propose to restrict attributes in general,
> or
> only those which will be reflected in runtime types?   There are
> several
> cases where one really wants to be able to use general expressions as
> attributes, such as the example given by Yaron:
> 
>           type t =
>             { a : int with default(2), sexp_drop_if(fun x -> x = 2);
>             } with sexp

I am probably missing something here...

Are you discussing the ability to store some attribute
for runtime retrieval? In this case, how do you intent
to store the function? I mean, you cannot marshal it
as a closure, and at the very same time its usefulness
at runtime seems to be based on the ability to actually
execute it?


Regards,

Xavier Clerc