# File lib/unicode/display_width.rb, line 56
  def display_width(ambiguous = 1)
    #codepoints.inject(0){ |a,c|
    unpack('U*').inject(0){ |a,c|
      width = case Unicode::DisplayWidth.codepoint(c).to_s
              when *%w[F W]
                2
              when *%w[N Na H]
                1
              when *%w[A] # TODO
                ambiguous
              else
                1
              end
      a + width
    }
  end