#instance_methods on a singleton class

ruby-talk
1

Given:

    class C
      def self.m; end
    end
    class D < C; end

the superclass of the singleton class of D is the singleton class of C. However

    (class << D; self; end).instance_methods(false)

includes m, both in 1.8 and 1.9. Is that intentional or is it a bug?

2

Just a remark here. That's what Flanagan & Matz says, but the draft of
the spec says that the superclass of an eigenclass is implementation
defined, and that the singleton class of D has the singleton class of
C among its superclasses.

So the question still holds, either the spec is wrong, or there's a
bug I believe. Perhaps I should ask in -core.

···

On Fri, Mar 19, 2010 at 12:08 PM, Xavier Noria <fxn@hashref.com> wrote:

Given:

class C
def self.m; end
end
class D < C; end

the superclass of the singleton class of D is the singleton class of C.