module Haml::ObjectRef

def parse(args)
  object, prefix = args
  return {} unless object
  suffix =
    if object.respond_to?(:haml_object_ref)
      object.haml_object_ref
    else
      underscore(object.class)
    end
  {
    'class' => [prefix, suffix].compact.join('_'),
    'id'    => [prefix, suffix, object.id || 'new'].compact.join('_'),
  }
end