module Regexp::Expression

  module CharacterType
    class Base < Regexp::Expression::Base; end

    class Any         < CharacterType::Base; end
    class Digit       < CharacterType::Base; end
    class NonDigit    < CharacterType::Base; end
    class Hex         < CharacterType::Base; end
    class NonHex      < CharacterType::Base; end
    class Word        < CharacterType::Base; end
    class NonWord     < CharacterType::Base; end
    class Space       < CharacterType::Base; end
    class NonSpace    < CharacterType::Base; end
  end

end