Okasaki's $-Notation

Okasaki's $-Notation

[Arne Koewing]

Hi everyone, 

has somebody already tried to implement
Okasaki's $-Notation for lazy values in ML
in camlp4 ?

I'm stuck, implementing his pattern matching extension,
(I'm completely new to camlp4...)


Arne

Re: [Caml-list] Okasaki's $-Notation

[Brian Hurt]

On Tue, 13 Sep 2005, Arne Koewing wrote:

> Hi everyone,
>
> has somebody already tried to implement
> Okasaki's $-Notation for lazy values in ML
> in camlp4 ?
>
> I'm stuck, implementing his pattern matching extension,
> (I'm completely new to camlp4...)

A) No I haven't, so judge the following comments with this in mind

B) One of the reasons I don't like Okasaki's $ notation is that it 
represents both suspending the computation and forcing the computation.  I 
often times have trouble figuring out which meaning is meant with any 
given use.  Which I'm wondering might not be your problem- if I have a 
hard time figuring it out, how hard is it going to be for the computer to 
figure it out?

Brian

Re: [Caml-list] Okasaki's $-Notation

[Arne Koewing]

Brian Hurt <bhurt@spnz.org> writes:

>
> B) One of the reasons I don't like Okasaki's $ notation is that it 
> represents both suspending the computation and forcing the computation.  I 
> often times have trouble figuring out which meaning is meant with any 
> given use.  Which I'm wondering might not be your problem- if I have a 
> hard time figuring it out, how hard is it going to be for the computer to 
> figure it out?

Well, that's true.
I like that his suspending operation does not need parenthesis, but
that's no major advantage over ocaml's "lazy".

But support for pattern-matching of lazy values seems to be valuable...