ClassMacro2

class_macros2.rb

class Bar
  class << self
    def self.bar(method)
      define_method(method) do
        puts "Bar.#{method} called."
      end
    end

    bar :foo
    bar :baz
  end
end

Bar.foo #=> Bar.foo called.
Bar.baz #=> Bar.baz called.

class Baz
  class << self
    class << self
      def baz(method)
        define_method(method) do
          puts "Baz.#{method} called."
        end
      end
    end

    baz :foo
    baz :bar
  end
end

Baz.foo #=> Baz.foo called.
Baz.bar #=> Baz.bar called.