How do the Kernel.singleton_methods get to be Object.private_instance_methods?
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Are they? I do not think so, maybe you could rephrase your question, I
am probably missing something.
Cheers
Robert
On 8/4/07, ronald braswell <rpbraswell@hotmail.com> wrote:
How do the Kernel.singleton_methods get to be
Object.private_instance_methods?
--
[...] as simple as possible, but no simpler.
-- Attributed to Albert Einstein
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
On Sat, 4 Aug 2007, ronald braswell wrote:
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From: "Robert Dober" <robert.dober@gmail.com>
Reply-To: ruby-talk@ruby-lang.org
To: ruby-talk@ruby-lang.org (ruby-talk ML)
Subject: Re: Object.private_instance_methods <--- Kernel.singleton_methods
Date: Sat, 4 Aug 2007 20:30:10 +0900> 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--
[...] as simple as possible, but no simpler.
-- Attributed to Albert Einstein
The question was not a good one. I now understand that the Kernel singleton methods are copies of private instance methods due to a call to module_function on them. Kernel's private instance versions of the methods get mixed in with Object as well as its public instance methods. I had not noticed that Kernel had private instance variables of the same name as its singleton methods.
Ron
On 8/4/07, ronald braswell <rpbraswell@hotmail.com> wrote:
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>From: "Robert Dober" <robert.dober@gmail.com>
>Reply-To: ruby-talk@ruby-lang.org
>To: ruby-talk@ruby-lang.org (ruby-talk ML)
>Subject: Re: Object.private_instance_methods <--- Kernel.singleton_methods
>Date: Sat, 4 Aug 2007 20:30:10 +0900
>
> > 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
>
>
>--
>[...] as simple as possible, but no simpler.
>-- Attributed to Albert Einstein
>The question was not a good one. I now understand that the Kernel singleton
methods are copies of private instance methods due to a call to
module_function on them. Kernel's private instance versions of the methods
get mixed in with Object as well as its public instance methods. I had not
noticed that Kernel had private instance variables of the same name as its
singleton methods.
ah you meant the results, of course, I am the worst guesser of the world 
R.
On 8/5/07, ronald braswell <rpbraswell@hotmail.com> wrote:
>On 8/4/07, ronald braswell <rpbraswell@hotmail.com> wrote:
Ron
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--
[...] as simple as possible, but no simpler.
-- Attributed to Albert Einstein