module requirement 早期检查实施要求的概念性工作

模块::需求早期检查实施要求的概念性工作用法require 'module/requirement' module Iterable include Module :: Requirement include Enumerable requires :each end class List include Iterable # => Module::Requirement::Error::NotMeetRequirements List must implement required methods: each end安装echo 'gem "module-requirement", :git => "git://github.com/aereal/module-requirement.git"' >> Gemfile执照麻省理工学院执照（另见LICE