[ruby-core:24238] Re: [Bug #1747] Immediate Values Can be Frozen

On Jul 9, 2009, at 12:15 AM, Yusuke ENDOH wrote:
>
> It seems to be an intentional change for the following use case:
>
>  # http://nov.tdiary.net/20071215.html#p02 (In Japanese)
>  CONST2 = ["hoge", 1].freeze
>  CONST2.each(&:freeze).all?(&:frozen?) #=> false (expected true)
>
> I have no idea whether the the rationale is sensible or not.
> If the compatibility can be ignored, it would be more reasonable that
> all immediate values are frozen as a default.

Making Fixnum instances frozen by default would break code that  
depended on instance variable state:

class Fixnum
   attr_accessor :note
end

42.note = 'the meaning of life'

Gary Wright