From: "me@..." <me@...>
Date: 2008-01-29T00:44:59+09:00
Subject: Adding instance variables using module include

Hi there,

If I have a module and class like this:

module VisitMemory
    def mark_visited(method)
        @methods_visited << method.my_declaration_signature
    end

    def already_visited?(method)
        @methods_visited.include?(method.my_declaration_signature)
    end
end

module Guff
    module JavaSource
        class Class
            include VisitMemory
        end
    end
end

How can i ensure that all instances of Guff::JavaSource::Class is
going to have the instance variable @methods_visited ?

So that this will work:

Guff::JavaSource::Class.new.already_visited?(something)

Thanks very much,
Mike.