Class#inherited
>> class Class >> def inherited(subclass) >> puts "#{self}'s subclass:#{subclass} is defined" >> subclass.instance_variable_set('@klass_hensu', "KlassHensu") >> end >> end => nil >> class Hoge >> def self.hoge >> @klass_hensu >> end >> end => nil >> Hoge.hoge => "KlassHensu"
クラスのインスタンス変数・・