[Nitro] class_extension

[transfire at gmail.com]

<quote>
Dear (core) devs,

from now on, please avoid using the facets class_extension helper.
Instead use the standard Ruby base.extend(ClassMethods) idiom. I think
this is more readable.
</quote>

All the trouble I went threw to get Matz to offer us a reliable
mechanism for module singleton inheritance and your just going to dump
it? And for what? Because you think:

  module Foo

    def self.included(base)
      base.extend(ClassMethods)
    end

    module ClassMethods
      # code
    end

Is more readable than

  module Foo

    class_extension do
      # code
    end

Are you kidding me? Moreover, do you understand the technical
differences between the two? Do you realize that the first does not
extend past the first inclusion? Ie. include Foo above into Bar and
then Bar into Baz, Baz would not have the module methods --for that
you'd have to add even more crufty code.

If you don't like the name class_extension an alternate can be
considered. It may also be possible, though not nearly as efficient,
to have syntax like:

  module Foo

    def ext.some_method
      ...

T.