new

# File lib/rdoc/ri/ri_util.rb, line 28
  def initialize(arg)
    @class_names = []
    separator = nil

    tokens = arg.split(/(\.|::|#)/)

    # Skip leading '::', '#' or '.', but remember it might
    # be a method name qualifier
    separator = tokens.shift if tokens[0] =~ /^(\.|::|#)/

    # Skip leading '::', but remember we potentially have an inst

    # leading stuff must be class names
    
    while tokens[0] =~ /^[A-Z]/
      @class_names << tokens.shift
      unless tokens.empty?
        separator = tokens.shift
        break unless separator == "::"
      end
    end
    
    # Now must have a single token, the method name, or an empty
    # array
    unless tokens.empty?
      @method_name = tokens.shift
      # We may now have a trailing !, ?, or = to roll into
      # the method name
      if !tokens.empty? && tokens[0] =~ /^[!?=]$/
        @method_name << tokens.shift
      end

      if @method_name =~ /::|\.|#/ or !tokens.empty?
        raise RiError.new("Bad argument: #{arg}") 
      end
      if separator && separator != '.'
        @is_class_method = separator == "::"
      end
    end
  end