From: Robert Klemme <bob.news@...>
Date: 2006-03-24T00:48:53+09:00
Subject: Re: specify a mandatory block parameter

13 wrote:
> Hi,
> 
> I'm not sure how blocks are treated internally by Ruby (if some expert
> can tell us, then it would be great) but when we are using blocks in
> our Ruby code then they are objects of class Proc (again, please,
> confirm someone if I'm wrong).
> 
> --
> Martins
> 
> 
> On 3/23/06, Eric Schwartz <emschwar@fc.hp.com> wrote:
>> 13 <one.three@gmail.com> writes:
>>> Blocks are actually objects of class Proc
>> Are you sure?  I did a lot of reading up on blocks lately, and from
>> what I learned, blocks are one of the very few things in Ruby that are
>> not objects.  You can, however, automatically convert them to Proc
>> objects if you need to; maybe that's what you're noticing?
>>
>> -=Eric

Actually Eric is right.  They are only objects if you request them to be.

def foo
   # no object
   yield 1
end

def bar(&b)
   # Proc instance
   b[2]
end

Kind regards

	robert