From: "Mauricio Fernández" <batsman.geo@...>
Date: 2004-04-20T06:05:35+09:00
Subject: Re: convert yield to proc

On Tue, Apr 20, 2004 at 05:32:22AM +0900, Dan Doel wrote:
> The original problem with the code was that he was instance_evaling the
> block in #mode. So if no block was passed, he'd end up with something like
> the following:
> 
>   instance_eval do
>     yield
>   end
> 
> And you can't yield in a block given to instance eval (not sure I totally
> understand why, but I have a gut feeling that you shouldn't try it :)).

irb(main):002:0> def foo; "aa".instance_eval{ yield } end
=> nil
irb(main):003:0> foo{puts "adsda"}
adsda

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