Object.private_instance_methods <--- Kernel.singleton_methods

[ronald braswell]

How do the Kernel.singleton_methods get to be
Object.private_instance_methods?

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[Robert Dober]

How do the Kernel.singleton_methods get to be
Object.private_instance_methods?

Are they? I do not think so, maybe you could rephrase your question, I
am probably missing something.

Cheers
Robert

 

[dblack]

Hi --

How do the Kernel.singleton_methods get to be
Object.private_instance_methods?

Following the trail in eval.c and class.c, it looks like they're bound
to Ruby names with rb_define_global_function:

rb_define_global_function("raise", rb_f_raise, -1);

That, in turn, calls rb_define_module_function for Kernel, which
establishes the method as (a) a singleton method of Kernel itself, and
(b) a private instance method of Kernel.

The private instance methods then trickle down. You can see them not
only with Object but with other classes too:

Class.new.private_instance_methods == Object.private_instance_methods
=> true


David

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[Robert Dober]

The question was not a good one. I now understand that the Kernel single= ton
methods are copies of private instance methods due to a call to
module_function on them. Kernel's private instance versions of the meth= ods
get mixed in with Object as well as its public instance methods. I had n= ot
noticed that Kernel had private instance variables of the same name as it= s
singleton methods.

ah you meant the results, of course, I am the worst guesser of the world
R.

Ron

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