Req #81338 [Opn->Nab]: readonly properties cannot be used with iterators

Edit report at https://bugs.php.net/bug.php?id=81338&edit=1 ID: 81338 Updated by: nikic@php.net Reported by: julien dot boudry at gmail dot com Summary: readonly properties cannot be used with iterators -Status: Open +Status: Not a bug Type: Feature/Change Request Package: *General Issues Operating System: All PHP Version: 8.1.0beta2 Block user comment: N Private report: N New Comment: Modifying IAP is still a modification, so declining this feature request. Generally, I would recommend to never use the IAP and instead use either ArrayIterator or generators. Previous Comments: ------------------------------------------------------------------------ [2021-08-06 13:42:01] julien dot boudry at gmail dot com Description: ------------ https://3v4l.org/edgYU/rfc#vgit.master Internal array pointer can not be modified for readonly properties. This strongly limits the possibility of implementing Iterator interfaces using them. The following example is simpler, but still follows the same principle. These properties would be much more useful if the pointer remained free, as the data itself is not impacted. Test script: --------------- <?php class A { public function __construct (public readonly array $ary = [0,1,2,3]) {} } $obj = new A; var_dump(current($obj->ary)); next($obj->ary); var_dump(current($obj->ary)); Expected result: ---------------- int(0) int(1) Actual result: -------------- int(0) Fatal error: Uncaught Error: Cannot modify readonly property A::$ary in /in/CBCan:12 Stack trace: #0 {main} thrown in /in/CBCan on line 12 Process exited with code 255. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=81338&edit=1