Operator precedence is undefined?

From:	Yasuo Ohgaki	Date:	Sat, 20 Jul 2013 00:12:52 +0000
Subject:	Operator precedence is undefined?
Groups:	php.internals
Request:	Send a blank email to [email protected] to get a copy of this message

Hi all,

Take a look at this bug report.

https://bugs.php.net/bug.php?id=65087

He complains about documentation of ++/--.
The doc says

http://www.php.net/manual/en/language.operators.precedence.php
---------------
// mixing ++ and + produces undefined behavior
$a = 1;
echo ++$a + $a++; // may print 4 or 5
---------------

"may print 4 or 5"?? Undefined??
In old PHP there may be such limitation.

I cannot believe this is true now, but I ask list before I fix doc.

Any comments?

--
Yasuo Ohgaki
[email protected]


   

Thread (30 messages)

• Yasuo OhgakiSat, 20 Jul 2013 00:12:52 +0000
  • Sara GolemonSat, 20 Jul 2013 00:36:15 +0000
    • Yasuo OhgakiSat, 20 Jul 2013 00:55:35 +0000
      • Sherif RamadanSat, 20 Jul 2013 01:58:16 +0000
        • Yasuo OhgakiSat, 20 Jul 2013 02:16:24 +0000
          • Sherif RamadanSat, 20 Jul 2013 02:21:34 +0000
            • Yasuo OhgakiSat, 20 Jul 2013 02:36:52 +0000
              • Sherif RamadanSat, 20 Jul 2013 03:09:51 +0000
                • Yasuo OhgakiSat, 20 Jul 2013 03:27:41 +0000
          • Sara GolemonSat, 20 Jul 2013 03:56:52 +0000
            • Sherif RamadanSat, 20 Jul 2013 04:27:34 +0000
            • Levi MorrisonSat, 20 Jul 2013 04:27:59 +0000
            • Yasuo OhgakiSat, 20 Jul 2013 04:28:25 +0000
              • Sara GolemonSat, 20 Jul 2013 04:44:46 +0000
                • Sherif RamadanSat, 20 Jul 2013 05:08:30 +0000
                  • LeighSat, 20 Jul 2013 05:27:14 +0000
                  • Sara GolemonSat, 20 Jul 2013 05:33:08 +0000
                    • Adam HarveySat, 20 Jul 2013 05:46:22 +0000
                    • Sherif RamadanSat, 20 Jul 2013 06:00:22 +0000
                      • Rasmus LerdorfSat, 20 Jul 2013 10:33:01 +0000
                • Yasuo OhgakiSat, 20 Jul 2013 06:25:28 +0000
            • Stas MalyshevSat, 20 Jul 2013 07:45:10 +0000
              • Yasuo OhgakiSat, 20 Jul 2013 07:58:29 +0000
                • Yasuo OhgakiSat, 20 Jul 2013 09:34:53 +0000
  • Stas MalyshevSat, 20 Jul 2013 07:37:26 +0000
    • Sherif RamadanSat, 20 Jul 2013 07:59:59 +0000
      • Stas MalyshevSat, 20 Jul 2013 20:55:04 +0000
        • Sherif RamadanSun, 21 Jul 2013 01:40:06 +0000
          • Yasuo OhgakiSun, 21 Jul 2013 02:52:00 +0000
            • Ford, MikeTue, 23 Jul 2013 08:52:06 +0000RE: [PHP-DEV] Operator precedence is undefined?