Re: [Caml-list] Why should I use .mli files?

[Didier Cassirame <didier.cassirame@gmail.com>]

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2012/10/31 Oliver Bandel <oliver@first.in-berlin.de>

>
>
> Am 30.10.2012 um 16:52 schrieb Didier Cassirame <
> didier.cassirame@gmail.com>:
>
> >
> > Thinking about it, there's at least one case where mli files are not so
> useful: When you have several modules which must all comply with a certain
> module type. In that case, all the mli files would be identical, and a
> modification of the module type would necessitate to change all the .mli.
>
> Sounds like you reformulated an advantagenas being a disadvantage.
> If someone changes a type of a module by accident, it,will pop up as
> problem.
> Also I wonder, if a type that is used by other modules
> might not also need to change the mplementation.
>

Yes, reading my words now, maybe the wording wasn't that great.
When you're using functors, you usually expect a very specific interface
for lifted modules. In fact, it's not so clear cut, but I think it's good
practice to conform the lifted modules to the module type that the functor
expects. Ah, also, one cannot make a functor of a ml/mli file.

That's the kind of situation I was thinking about, because I more or less
had the problem, for one of my projects. I am still not sure about the best
way to split the code in several files (The practice for functors is to
have a Make functor within the module, which is Ok, but if I want to have
each module in its own file, I don't know how to do it properly).

didier

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