From: Michael Neumann <mneumann@...>
Date: 2008-11-28T17:51:01+09:00
Subject: Re: private #initialize

Robert Dober schrieb:
> On Fri, Nov 28, 2008 at 12:32 AM, Yukihiro Matsumoto <matz@ruby-lang.org> wrote:
> 
>> #initialize is, by its design, supposed to be called only from within
>> #new to separate per object/class initialization from the #new, thus
>> you don't have to redefine #new.  When you need/want to redefine #new,
>> it's a sign of a bad design, I believe.
> I am delivering this code to your judgment
> 
> module Immutable
>   def new *args, &blk
>     o = allocate
>     o.send( :initialize, *args, &blk )
>     o.freeze
>   end
> end

How about this?

module Immutable
   def new(*args, &blk)
     super.freeze
   end
end

Okay, this will not work if you redefine #new yourself. Or that?

module Immutable
   def self.included(klass)
     class << klass
       alias __old_new new
       def new(*args, &blk)
         __old_new(*args, &blk).freeze
       end
     end
   end
end

(will not work when including into a module)

Regards,

   Michael