def parse_string(string, options = {}, &block)
      parse_io(StringIO.new(string), options, &block)
    end
def parse_string(string, options = {}, &block)
      parse_io(StringIO.new(string), options, &block)
    end
Parses a string. It will simply call parse_io. This function does not support progress updates.
 <tt>string</tt>:: The string that should be parsed.
 <tt>options</tt>:: A Hash of options that will be pased to parse_io.