From: mental@...
Date: 2005-11-03T02:18:14+09:00
Subject: Re: Anonymous methods, blocks etc. (Cont. 'default block params')

Quoting Trans <transfire@gmail.com>:

> You are right in that there is a caveat for having this in that
> you need to know that they are going to be "anonymous methods"
> in order to pass them around. But the same is true for calling a
> proc, i.e. you have to know it's a proc to call it.

Actually, no, you just need to know it's a Callable.  Or duck-typed
like one.  Could be a continuation, or a proc, or some proxy object
I just invented.

I find that to be a very, very valuable property.

> def proxy(a)
>   if lambda? a
>     actual(->a)
>   else
>     actual(a)
>   end
> end

Try:

 def proxy(a)
   if respond_to? :call
     actual(->a)
   else
     actual(a)
   end
 end

If we do this, -> ought to work on anything that understands :call.

-mental