module ActiveSupport module CoreExtensions module Module # Returns the name of the module containing this one. # # p M::N.parent_name # => "M" def parent_name unless defined? @parent_name @parent_name = name =~ /::[^:]+\Z/ ? $`.freeze : nil end @parent_name end # Returns the module which contains this one according to its name. # # module M # module N # end # end # X = M::N # # p M::N.parent # => M # p X.parent # => M # # The parent of top-level and anonymous modules is Object. # # p M.parent # => Object # p Module.new.parent # => Object # def parent parent_name ? parent_name.constantize : 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 # # p M.parents # => [Object] # p M::N.parents # => [M, Object] # p X.parents # => [M, Object] # def parents parents = [] if parent_name parts = parent_name.split('::') until parts.empty? parents << (parts * '::').constantize parts.pop end end parents << Object unless parents.include? Object parents end if RUBY_VERSION < '1.9' # Returns the constants that have been defined locally by this object and # not in an ancestor. This method is exact if running under Ruby 1.9. In # previous versions it may miss some constants if their definition in some # ancestor is identical to their definition in the receiver. def local_constants inherited = {} ancestors.each do |anc| next if anc == self anc.constants.each { |const| inherited[const] = anc.const_get(const) } end constants.select do |const| !inherited.key?(const) || inherited[const].object_id != const_get(const).object_id end end else def local_constants #:nodoc: constants(false) end end # Returns the names of the constants defined locally rather than the # constants themselves. See local_constants. def local_constant_names local_constants.map { |c| c.to_s } end end end end