On Friday 22 October 2004 07:19, skaller wrote:
> ...I consider that a bug...

I'd have to go right ahead and disagree with you there. Surely a "procedure" 
returns no information, which can be achieved by returning the only value 
from a type representing a singleton set, i.e. _the_ value of the type unit.

>  type void = []

Why not "`void"?

I've been wondering about this recently: how do the compilers store types 
which contain "unit". For example, if we have a tree:

type 'a 'b tree = Leaf of 'a | Node of 'b * 'a 'b tree * 'a 'b tree

Does a "unit unit tree" take up less space than a "int int tree"?

The reason I'm asking is that it might be nice to generalise data structures 
as much as possible and then specialise them using "unit" arguments.

Cheers,
Jon.

-------------------
To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr
Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/
Beginner's list: http://groups.yahoo.com/group/ocaml_beginners