class RDoc::Markdown::Literals

def setup_parser(str, debug=false)

call this method before #parse
Prepares for parsing +str+. If you define a custom initialize you must 
def setup_parser(str, debug=false)
  set_string str, 0
  @memoizations = Hash.new { |h,k| h[k] = {} }
  @result = nil
  @failed_rule = nil
  @failing_rule_offset = -1
  setup_foreign_grammar
end