Ruby/Development/Aspect Oriented Programming

require "aspectr"
class Verbose < AspectR::Aspect
 def describe(method_sym, object, *args)
    "#{object.inspect}.#{method_sym}(#{args.join(",")})"
  end
  def before(method_sym, object, return_value, *args)
    puts "About to call #{describe(method_sym, object, *args)}."
  end
  def after(method_sym, object, return_value, *args)
    puts "#{describe(method_sym, object, *args)} has returned " +
      return_value.inspect + "."
  end
end
verbose = Verbose.new
stack = []
verbose.wrap(stack, :before, :after, :push, :pop)
p stack.push(10)
p stack.pop