[ruby-talk:00595] Re: Bug in Array#clone!

Hi, 

In message "[ruby-talk:00593] Re: Bug in Array#clone!"
    on 99/08/10, Yukihiro Matsumoto <[e-mail]> writes:
>You are right, except one point.  `dup' is value copying method,
>unlike `clone' it does not have to copy all the information.

Oh, I've never heard that!  Would you tell me more details on the
defference between `dup' and `clone'?

>With the patch I already sent, instance variables for String, Hash,
>and Array are not copied by your test script.

Thanks for your quick job. I've gotten "ok" for almost all but `IO':

  class Object
    attr_accessor :v
  end

  [ Object.new, 0, 0.0, 10**10, 1..10, Class.new, Module.new, 
    "", {}, [], //, STDOUT, open("/dev/null"), Struct.new("F").new, Time.now
  ].each do |obj|
    obj.v = "ok"
    p [obj.type, obj.dup.v, obj.clone.v]
  end

result:

  [Object, "ok", "ok"]
  [Fixnum, "ok", "ok"]
  [Float, "ok", "ok"]
  [Bignum, "ok", "ok"]
  [Range, "ok", "ok"]
  [Class, "ok", "ok"]
  [Module, "ok", "ok"]
  [String, nil, "ok"]
  [Hash, nil, "ok"]
  [Array, nil, "ok"]
  [Regexp, "ok", "ok"]
  [IO, nil, nil]
  [File, nil, nil]
  [Struct::F, "ok", "ok"]
  [Time, "ok", "ok"]

io.c:rb_io_clone() is too complex to modify for me...

-- gotoken

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