Hello,

> I'd like to define a class in Ocaml without giving intial values to its fields. Is it possible ?
No

> For example, as far as I've seen, a class with a int and an int list fields would look like this:
> 
> class dummy () =
> 	val mutable v = 0
> 	val mutable l = ([] : int list)
> end;;
> 
> 
> but what about a field of type t, for which there is no default value ?
> i.e.
> 
> 	val mutable v = ( ??? : t )
> 
That the same problem than trying to create an int ref with no default value.
You can't and you don't want !

> other questions:
> - are documentations available in pdf (Acrobat Reader) format ?
No

> - there is no 'per line' comment (like Ada's "--" or C++'s "//" ) ? 
No

-- 
(*                      Francois PESSAUX (Francois.Pessaux@inria.fr) *)
(*                               INRIA Rocquencourt - Projet CRISTAL *)
(*                               (http://pauillac.inria.fr/~pessaux) *)
;;