From: Gregory Seidman <gsslist+ruby@...>
Date: 2006-05-12T06:38:49+09:00
Subject: Re: final/closed classes in Ruby (was: Sharp knives and glue)

On Fri, May 12, 2006 at 06:27:13AM +0900, Berger, Daniel wrote:
} The 'Sharp knives and glue' thread inspired this.  It's probably been
} done before but here's my implementation of a final and/or closed class:
} 
} # Make a class unsubclassable
[...]
} # Close a class (no method definitions or redefinitions)
[...]
} class Foo
}    def test
}       puts "hello"
}    end
}    close(self) # No method additions/redefinitions allowed
} end
[...]

class Foo
  def test
    puts "hello"
  end
  freeze #this already exists and does what you want
end

} Regards,
} Dan
--Greg