class Fluent::Compat::TextParser::RegexpParser

def configure(conf)
  return if @manually_configured # not to run twice
  conf['expression'] ||= @stored_regexp.source
  conf['ignorecase'] ||= @stored_regexp.options & Regexp::IGNORECASE != 0
  conf['multiline'] ||= @stored_regexp.options & Regexp::MULTILINE != 0
  convert_type_converter_parameters!(conf)
  super
end

def initialize(regexp, conf = {})
  super()
  @stored_regexp = regexp
  @manually_configured = false
  unless conf.empty?
    conf_init = if conf.is_a?(Fluent::Config::Element)
                  conf
                else
                  Fluent::Config::Element.new('parse', '', conf, [])
                end
    self.configure(conf_init)
    @manually_configured = true
  end
end

def patterns
  {'format' => @regexp, 'time_format' => @time_format}
end