Ruby alias inheritance.rb

class A
  def foo
    p("A::Foo")
  end

  alias foo1 foo
end

class B < A
  def foo
    p("B::Foo")
  end
end

B.new.foo1 # "A::Foo is printed"

class C
  def foo
    p("C::Foo")
  end

  alias_method :foo1, :foo
end

class D < C
  def foo
    p("D::Foo")
  end
end

D.new.foo1 # "C::Foo is printed"

require 'forwardable'

class E
  extend Forwardable

  def foo
    p("C::Foo")
  end

  def_delegator :self, :foo, :foo1
end

class F < E
  def foo
    p("F::Foo")
  end
end

F.new.foo1 # "F::Foo is printed"