Re: [Caml-list] Warnings opening modules (was: why is building ocaml hard?)

["Hezekiah M. Carty" <hez@0ok.org>]

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type t = M.t does not bring M.t's constructors into scope.  ppx_import (
https://github.com/whitequark/ppx_import) can help with this if you don't
mind preprocessing.

Hez

On Fri, Jul 15, 2016 at 2:58 PM Yotam Barnoy <yotambarnoy@gmail.com> wrote:

> Ok I have to admit that's pretty convenient.
>
> > On Jul 15, 2016, at 2:09 PM, Jeremy Yallop <yallop@gmail.com> wrote:
> >
> >> On 15 July 2016 at 17:57, Yotam Barnoy <yotambarnoy@gmail.com> wrote:
> >> In haskell, I can just say 'import A (foo, bar, baz, t)' to limit
> >> exactly what I want to import. This is because haskell has a
> >> half-baked module system that isn't nearly as powerful as OCaml's,
> >> which allows it to create syntax that doesn't need to go anywhere but
> >> at the toplevel.
> >>
> >> We need this functionality in OCaml, but the closest thing is to say
> >> 'include struct let foo = A.foo let bar = A.bar let baz = A.baz type t
> >> = A.t end'
> >
> > This can be written more succinctly:
> >
> >   let foo, bar, baz = A.(foo, bar, baz)
> >   type t = A.t
>
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