note 127493 added to language.oop5.decon

Please note that constructor argument promotion is kind of half-baked (at least as of 8.1 and it does not look to be changed in 8.2) and you are not allowed to reuse promoted argument with other promoted arguments. For example having "old style" constructor: <?php public function __construct(protected string $val, protected Foo $foo = null) { $this->val = $val; $this->foo = $foo ?? new Foo($val); } ?> you will not be able to use argument promotion like this: <?php public function __construct(protected string $val, protected Foo $foo = new Foo($val)) {} ?> nor <?php public function __construct(protected string $val, protected Foo $foo = new Foo($this->val)) {} ?> as in both cases you will face "PHP Fatal error: Constant expression contains invalid operations". ---- Server IP: 45.112.84.4 Probable Submitter: 185.85.3.173 (proxied: 2a00:f41:388a:319a:1c64:474b:77fb:ab08) ---- Manual Page -- https://php.net/manual/en/language.oop5.decon.php Edit -- https://main.php.net/note/edit/127493 Del: integrated -- https://main.php.net/note/delete/127493/integrated Del: useless -- https://main.php.net/note/delete/127493/useless Del: bad code -- https://main.php.net/note/delete/127493/bad+code Del: spam -- https://main.php.net/note/delete/127493/spam Del: non-english -- https://main.php.net/note/delete/127493/non-english Del: in docs -- https://main.php.net/note/delete/127493/in+docs Del: other reasons-- https://main.php.net/note/delete/127493 Reject -- https://main.php.net/note/reject/127493 Search -- https://main.php.net/manage/user-notes.php