From: daz <dooby@...10.karoo.co.uk>
Date: 2005-07-19T10:45:56+09:00
Subject: Re: How to find out a method's defining class ?


Rolf Gebauer wrote:
> Hi,
>
> 1. a method created with Classname.method( 'method_name' )
> knows the class it's defined for, as inspect shows.
>
> Object.methods returns an Array of Strings only.
>
> ObjectSpace.each_object( Method ) delivers methods created
> as in 1. only
>
> Does Reflection provides a way to find out ?
>


Like Ara said, it doesn't seem to be provided :-(
So, another (crude) hack ...

#---------------------------------
 class Method
   def definer_class
     inspect =~ /:\s(\w+)/
     Object.const_get($1)
   end
 end
#---------------------------------
 tm = Time.method(:now)
 p tm                 #-> #<Method: Time.now>
 p tm.definer_class   #-> Time
#---------------------------------


<aside:>
Internally the information we want is stored in an
instance_variable called @__attached__ but it's not
accessible from a script.  (??)

p tm.instance_variable_get(:@__attached__)
p tm.class.instance_variable_get(:@__attached__)
p (class << tm; self; end).instance_variable_get(:@__attached__)
#-> nil  # (all)
</aside:>


daz