From: "David A. Black" <dblack@...>
Date: 2005-10-20T09:42:44+09:00
Subject: Re: Method annotation and anonymous functions

Hi --

On Thu, 20 Oct 2005, Trans wrote:

>
> Jeff Wood wrote:
>> Yes it would, but I don't see another way to do attribution of methods
>> without causing compatibility issues .... do you?
>
> Nitro/Facets annotations system works like so:
>
>  class X
>    def foo ; "foo" ; end
>    ann :foo, :returns => String
>  end
>
>  X.ann :foo, :log => true
>
>  X.ann.foo.returns  #=> String

Ugh, if I may permit myself the expression  That means goodbye to
things like:

   def meth(thing)
     thing[some_thing_else]
   end

Pinning down the class of return values is similar to pinning down the
class of arguments -- arguably even more duck-typing-unfriendly, since
you're specifying not only what a given object has to be but,
potentially, what *its* methods have to return.


David

-- 
David A. Black
dblack@wobblini.net