ruby-decorate.md

Is this a bad idea?

module Decorate
  def decorate(definition, options)	
		self.send(:alias_method, "__original_#{definition}", definition)
		define_method definition, Proc.new { |*args|
			send(options.fetch(:with), *args, &Proc.new { |args|
				send("__original_#{definition}", *args)
			})
		}
	end
end

Object.include Decorate

class A
	class B
	
		def double(a)
			a * 2
		end
		
		def around(a)
			# do stuff before
			yield(a)
			# do stuff after
		end
		decorate :double, with: :around
	end	
end

a = A::B.new

p a.double(100)