Singleton class of singleton class of BasicObject in Ruby


Singleton class of singleton class of BasicObject in Ruby



This is mostly an "academic" one but here it goes:



According to the ruby eigenclass diagram (slightly edited) here:



enter image description here



BasicObject.singleton_class.singleton_class.superclass is Class.


BasicObject.singleton_class.singleton_class.superclass


Class



However running this on a ruby interpreter it turns out that BasicObject.singleton_class.singleton_class.superclass is #Class and not Class. Therefore, is the diagram lying or am I missing something?


BasicObject.singleton_class.singleton_class.superclass


#Class


Class



Thanks.





BasicObject.singleton_class.singleton_class.is_a?(Class) #⇒ true #Class is a string representation.
– mudasobwa
Jul 2 at 8:59


BasicObject.singleton_class.singleton_class.is_a?(Class) #⇒ true


#Class





Your question says BasicObject.singleton_class.singleton_class but your diagram says BasicObject.singleton_class.singleton_class.superclass. Please clarify.
– Stefan
Jul 2 at 9:02


BasicObject.singleton_class.singleton_class


BasicObject.singleton_class.singleton_class.superclass





@Stefan @mudasobwa You are right. I meant to say BasicObject.singleton_class.singleton_class.superclass. I also edited the question. Any clues are more than welcome.
– kstratis
Jul 2 at 9:18



BasicObject.singleton_class.singleton_class.superclass





@kstratis: not sure what confusion is still there after mudasobwa's clarification. It IS a Class.
– Sergio Tulentsev
Jul 2 at 9:37





I like your train of thought. This COULD be true. Maybe it was accurate at the time. On the other hand I haven't heard of any object model changes in Ruby in recent years. Anyway to tell you the truth I don't remember. It was months ago. I'll try to ping a moderator at the IRC and will update the post in case of any updates. Thanks for the help anyway.
– kstratis
Jul 2 at 9:53









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