require "active_support/inflector" class Module # Returns the name of the module containing this one. # # M::N.parent_name # => "M" def parent_name if defined?(@parent_name) @parent_name else parent_name = name =~ /::[^:]+\Z/ ? $`.freeze : nil @parent_name = parent_name unless frozen? parent_name end end # Returns the module which contains this one according to its name. # # module M # module N # end # end # X = M::N # # M::N.parent # => M # X.parent # => M # # The parent of top-level and anonymous modules is Object. # # M.parent # => Object # Module.new.parent # => Object def parent parent_name ? ActiveSupport::Inflector.constantize(parent_name) : Object end # Returns all the parents of this module according to its name, ordered from # nested outwards. The receiver is not contained within the result. # # module M # module N # end # end # X = M::N # # M.parents # => [Object] # M::N.parents # => [M, Object] # X.parents # => [M, Object] def parents parents = [] if parent_name parts = parent_name.split("::") until parts.empty? parents << ActiveSupport::Inflector.constantize(parts * "::") parts.pop end end parents << Object unless parents.include? Object parents end end