Re: [Ocaml-lib-devel] unknown length, user defined enumerations?

[Brian H. <bri...@ql...>]

On Thu, 17 Apr 2003, Remi Vanicat wrote:

> Well, is there I want to remind that those enumeration really look like
> Stream. one could use Stream for this.

Haven't looked at streams- although I thought they required Camlp4?  Plus, 
does this mean we have to do a List.of_stream and PSQueue.of_stream etc?

> 
> >
> > So I propose that count be allowed to return -1 to indicate "length 
> > unknown".  Throwing an exception might also be an idea. 
> 
> Throwing an exception is much better.

Yeah.  That catchs the case where bad programming forgot to handle the 
unknown length case.

Although I suppose we could also have count return:

type count_t = Known of int | Unknown

We're introducing a pointer dereference- but I don't think count is 
generally that big of a performance limit.  

Brian