Re: [Caml-list] Parameterizing a function with a thread monad

[Philippe Veber <philippe.veber@gmail.com>]

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2012/10/23 Jeremy Yallop <yallop@gmail.com>

> On 22 October 2012 23:09, Philippe Veber <philippe.veber@gmail.com> wrote:
> > A couple of libraries, like pgocaml for instance, define a functor over a
> > (monadic) thread implementation, like in the following:
> >
> > module type Thread = sig
> >   type 'a t
> >   val return : 'a -> 'a t
> >   val bind : 'a t -> ('a -> 'b t) -> 'b t
> > end
> >
> > module F(T : Thread) : sig
> >   val v : string -> string T.t
> > end
> >
> > Is it possible to define F as a function (ie at the value level)?
>
> Yes!  Matías Giovannini has a blog post showing how to do just that:
>
> http://alaska-kamtchatka.blogspot.co.uk/2011/09/higher-order-fun.html
>

Thanks a lot Jeremy, this is indeed exactly what I was looking for! I
suppose this (clever) representation has a cost at run-time. Maybe it'd be
worth to investigate it, as a typical monadic computation will use a lot of
bind/return operations. I'll try to have a look at it. Thanks again!

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