*
* This parser implements a "Precedence climbing" algorithm.
*
- * @see http://www.engr.mun.ca/~theo/Misc/exp_parsing.htm
- * @see http://en.wikipedia.org/wiki/Operator-precedence_parser
+ * @see https://www.engr.mun.ca/~theo/Misc/exp_parsing.htm
+ * @see https://en.wikipedia.org/wiki/Operator-precedence_parser
*
* @author Fabien Potencier <fabien@symfony.com>
*