Re: [Caml-list] module alias in a .mli file

[Paolo Donadeo <p.donadeo@gmail.com>]

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Actually this is not true, Martin explained how. :-)


-- 
Paolo
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Il giorno 19/nov/2012 11:35, "David House" <dhouse@janestreet.com> ha
scritto:

> Annoyingly though, there is no way to create a module alias in an mli.
>
> If, in an ml file, you have to refer often to
> Some_very_long_module_name, it can quite convenient to define an alias
> by doing "module Mod = Some_very_long_module_name" (or, locally, "let
> module Mod = Some_very_long_module_name in"). But there is no way of
> doing this in an mli: you have to use the long name every time.
>
> This is especially annoying if you have some big type that you want to
> expose in the mli. You really just want to copy-paste out of the ml
> file and stick it into the mli, but then you have to expand all the
> module aliases. (It's just a couple of goes with M-%, but still...)
>
> On Mon, Nov 19, 2012 at 6:36 AM, Francois Berenger <berenger@riken.jp>
> wrote:
> > On 11/19/2012 03:02 PM, Martin Jambon wrote:
> >>
> >> On Sun 18 Nov 2012 09:29:31 PM PST, Francois Berenger wrote:
> >>>
> >>> Hello,
> >>>
> >>> Here is my stupid question of the day:
> >>> can't I declare the following in a .mli file?
> >>>
> >>> module V3 = Vector3
> >>
> >>
> >> No, because "= Vector3" specifies an implementation.
> >> An mli file is a module interface, and module interfaces never contain
> >> implementations.
> >>
> >> However, you may want to do this, which does what it says:
> >>
> >>   module V3 : module type of Vector3
> >
> >
> > Thanks a lot! That's exactly what I needed. :)
> >
> >
> >
> >
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