ex.rb

module Dry
  module Types
    REGISTERED_STRUCTS = Concurrent::Array.new
    STRUCT_INHERITED = Struct.method(:inherited)

    def self.register_class(klass, meth = :new)
      type = Definition.new(klass).constructor do |*args, &block|
        Object.const_get(klass.to_s).public_send(meth, *args, &block)
      end
      container.register(identifier(klass), type)
    end

    class Struct
      def self.inherited(klass)
        REGISTERED_STRUCTS << klass
        STRUCT_INHERITED.call(klass)
      end

      def self.unregister
        Dry::Types.container._container.delete(Dry::Types.identifier(self))
      end
    end

    module Rails
      class Railtie < ::Rails::Railtie
        config.to_prepare do
          REGISTERED_STRUCTS.uniq.each(&:unregister)
        end
      end
    end
  end
end