Hi,

In message "Re: [ruby-core:41006] [ruby-trunk - Feature #5583] Optionally typing"
    on Mon, 14 Nov 2011 14:23:14 +0900, Kenta Murata <muraken / gmail.com> writes:

|I like this idea, and I cannot think this is a joke.
|I believe Ruby should have optional typing system in the future.
|Please reopen this issue and continue discussion.

(a) this syntax conflicts with (already decided) keyword arguments.
(b) in dynamic language like Ruby, optional typing should honor duck
    typing, I don't think previous discussion consider this aspect
    deeply enough.

							matz.