create

# File lib/resolv.rb, line 2822
      def self.create(arg)
        case arg
        when Alt
          return arg
        when String
          altitude = ''
          if Regex =~ arg
            altitude = [($1.to_f*(1e2))+(1e7)].pack("N")
          else
            raise ArgumentError.new("not a properly formed Alt string: " + arg)
          end
          return Alt.new(altitude)
        else
          raise ArgumentError.new("cannot interpret as Alt: #{arg.inspect}")
        end
      end