code: def p_exit(p):
      
      q = p[2]
      p[0] = make_sentence('EXIT_%s' % q)
  
      for i in gl.LOOPS:
          if q == i[0]:
              return
  
      syntax_error(p.lineno(1), 'Syntax Error: EXIT %s out of loop' % q)
docs: statement : EXIT WHILE
                    | EXIT DO
                    | EXIT FOR