From: Thomas Hafner <thomas@...>
Date: 2007-07-21T20:00:02+09:00
Subject: Re: Abstract methods in ruby ?

cypher.dp@gmail.com wrote/schrieb <2b4059ff0707111540w6cf25d59q10944fad85bc2dd1@mail.gmail.com>:

> Or: Is there a technique to force a subclass to implement a special method ?

Alternatively try something similiar to the the NVI idiom in C++:

  # interface
  module MyInterface
    def foo(*args, &block)
      do_foo(args, block)
    end
  end

  # special implementation of interface
  class MyClass
    include MyInterface

    private
    def do_foo(args, block)
      # TODO complete implementation
    end
  end

Regards
  Thomas