class Chronic::Repeater

def self.scan_for_season_names(token)
  scanner = {/^springs?$/ => :spring,
             /^summers?$/ => :summer,
             /^(autumn)|(fall)s?$/ => :autumn,
             /^winters?$/ => :winter}
  scanner.keys.each do |scanner_item|
    return Chronic::RepeaterSeasonName.new(scanner[scanner_item]) if scanner_item =~ token.word
  end
  return nil
end