From: Jim Weirich <jweirich@...>
Date: 2003-02-04T21:39:34+09:00
Subject: Re: Local variables & blocks

On Tue, 2003-02-04 at 05:01, Pit Capitain wrote:
> Hi Jim,
> 
> thanks for the weird Y fun :-)
> 
> Isn't your weird the same as
> 
>   def weird
>     x = nil
>     [proc {x}, proc {|v| x=v}]
>   end
> 
> and wouldn't this work under the new rules, too?

Yes, it is the same.  While thinking about the proposed rules for block
and local scope, I was just struck by the weird symmetry between {x} and
{|x|}.

And while we have mentioned the new scoping rules, I think the new 
rules are fine.  They are simplier and more regular than the existing
rules.  Its a little odd to declare block local varaibles using the
"local" trick, but then it kinda neat that the language can handle that
as well without any special rules.

-- 
-- Jim Weirich     jweirich@one.net    http://w3.one.net/~jweirich
---------------------------------------------------------------------
"Beware of bugs in the above code; I have only proved it correct, 
not tried it." -- Donald Knuth (in a memo to Peter van Emde Boas)