module Kramdown::Options

def self.parse(name, data)

String and then to the correct type.
If +data+ already has the correct type, it is just returned. Otherwise it is converted to a

value with the correct type.
Parse the given value +data+ as if it was a value for the option +name+ and return the parsed 
def self.parse(name, data)
  name = name.to_sym
  raise ArgumentError, "No option named #{name} defined" if !@options.has_key?(name)
  if !(@options[name].type === data)
    data = data.to_s
    data = if @options[name].type == String
             data
           elsif @options[name].type == Integer
             Integer(data) rescue raise Kramdown::Error, "Invalid integer value for option '#{name}': '#{data}'"
           elsif @options[name].type == Float
             Float(data) rescue raise Kramdown::Error, "Invalid float value for option '#{name}': '#{data}'"
           elsif @options[name].type == Symbol
             data.strip!
             data = data[1..-1] if data[0] == ?:
             (data.empty? || data == 'nil' ? nil : data.to_sym)
           elsif @options[name].type == Boolean
             data.downcase.strip != 'false' && !data.empty?
           end
  end
  data = @options[name].validator[data] if @options[name].validator
  data
end