class Fluent::Plugin::RegexpParser

def configure(conf)
  super
  # For compat layer
  if @ignorecase || @multiline
    options = 0
    options |= Regexp::IGNORECASE if @ignorecase
    options |= Regexp::MULTILINE if @multiline
    @expression = Regexp.compile(@expression.source, options)
  end
  @regexp = @expression # For backward compatibility
  if @expression.named_captures.empty?
    raise Fluent::ConfigError, "No named captures in 'expression' parameter. The regexp must have at least one named capture"
  end
end

def parse(text)
  m = @expression.match(text)
  unless m
    yield nil, nil
    return
  end
  r = {}
  m.names.each do |name|
    if value = m[name]
      r[name] = value
    end
  end
  time, record = convert_values(parse_time(r), r)
  yield time, record
end