適当なコマンドラインパーサ その２

もう少しましになるように書き直し。

class CLP

  def initialize(keys={})

    @keys = keys

    @opts = {}

    @args = 

  end
  def hook(key, len=0)

    @keys[key] = len;

  end
  def parse(args)

    while prm = args.shift

      if (prm =~ %r|^[-/]|) && @keys.has_key?($')

        key = $'

        buf = 

        @keys[key].times {

          break if args.empty? || args.first =~ %r|^[-/]|

          buf << args.shift

        }

        if @keys[key] < 2

          @opts[key] = buf.empty? ? "" : buf.first

        else

          @opts[key] = buf

        end

      else

        @args << prm

      end

    end

  end
  def [](nth)

    return @args[nth]

  end
  def method_missing(name, *args)

    return args.empty? ? @opts[name.to_s] : super

  end

end

clp = CLP.new("o1"=>0, "o2"=>1)

p ARGV #=> ["-o1", "-o2", "foo", "bar", "zoo"] 

clp.parse(ARGV)

p clp.o1 #=> ""

p clp.o2 #=> "foo"

p clp.o3 #=> nil

p clp[0] #=> "bar"

p clp[1] #=> "zoo"