instance method new_constants

# File activesupport/lib/active_support/dependencies.rb, line 117
      def new_constants
        constants = []

        # Grab the list of namespaces that we're looking for new constants under
        @watching.last.each do |namespace|
          # Retrieve the constants that were present under the namespace when watch_namespaces
          # was originally called
          original_constants = @stack[namespace].last

          mod = Inflector.constantize(namespace) if Dependencies.qualified_const_defined?(namespace)
          next unless mod.is_a?(Module)

          # Get a list of the constants that were added
          new_constants = mod.constants(false) - original_constants

          # @stack[namespace] returns an Array of the constants that are being evaluated
          # for that namespace. For instance, if parent.rb requires child.rb, the first
          # element of @stack[Object] will be an Array of the constants that were present
          # before parent.rb was required. The second element will be an Array of the
          # constants that were present before child.rb was required.
          @stack[namespace].each do |namespace_constants|
            namespace_constants.concat(new_constants)
          end

          # Normalize the list of new constants, and add them to the list we will return
          new_constants.each do |suffix|
            constants << ([namespace, suffix] - ["Object"]).join("::".freeze)
          end
        end
        constants
      ensure
        # A call to new_constants is always called after a call to watch_namespaces
        pop_modules(@watching.pop)
      end