module M
  def self.included(base)
    base.constants.each do |const|
      # we need to transfer the including class Constants so that they can be accessed from
      # the TemplatedGenerator instance methods
      self.const_set(const, eval("#{base}::#{const}"))
    end
  end

  def display_constant
    puts "Module M needs to access the #{SomeConstant}"
  end

end

class A
  SomeConstant = "Constant from A"
  include M
end

class B
  SomeConstant = "Constant from B"
  include M
end



a = A.new
a.display_constant

b = B.new
b.display_constant