[Caml-list] mystified by typing of optional arguments

[Francois Rouaix <francois@rouaix.org>]

Hi all,
The following example mystifies me

let f ?opt x =
   match opt with
   | None -> x
   | Some dx -> x + dx

let g x = x + 1


let h1 = function
   | 0 -> [g]
   | _ -> [f; g]


let h2 = function
   | _ -> [f; g]


h1 is typable but not h2.
Why is that ?

--f
PS: the example code is not meant to be useful in any way other than 
reproducing the behavior of type checking.

-------------------
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