From: Erik Veenstra <erikveen@...>
Date: 2006-07-28T05:52:59+09:00
Subject: Re: Wrapped method causing infinite recursion in rcov

I don't like advertising my own work, but...

>  old_get=instance_method(:get)
>  define_method(:get) do |*args|
>     old_get[*args]

This works, unless you want the method to receive a &block.
(Though that's fixed in Ruby 1.9.)

I would do this:

 class Module
   def assert_valid_markup(method_name) do
     post_condition(method_name) do |obj, method_name, args, block|
       # Check it...
     end
   end
 end

 class Foo
   def get(*args)
     # The real stuff...
   end

   assert_valid_markup :get     if $DEBUG
 end

I call this assert_valid_markup a "monitor-function" [1]. This
post_condition is defined on the site as well.

gegroet,
Erik V. - http://www.erikveen.dds.nl/

 [1] http://www.erikveen.dds.nl/monitorfunctions/index.html