Hi,

> Here is a variant of your version with first-class modules
> (which will be available in OCaml 3.12). Compared to your
> version, we get the benefit of laziness (the "functor body"
> is evaluated only once).

I see, thanks.  That is actually a very welcome feature; I have in the
past attempted to use modules as first-class values, and found the lack
thereof a bit disappointing, as it "breaks the symmetry" between values
and modules.

Anyway, 3.12 is looking interesting -- are there any other features we
should be aware of?  (I'm hoping GADTs will be in the pipeline eventually...)

Cheers,
Dario Teixeira