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<?php class Wagon { private $name; public function setName($name){ $this->name = $name; } public function getName(){ return $this->name; } } class Train { public function __construct(array $wagons) { $this->wagons = (function (Wagon $wagons) { return $wagons->getName(); })($wagons); } } $vagon = new Wagon(); $vagon->setName('vagon 1'); var_dump(new Train([$vagon]));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: Train::{closure}(): Argument #1 ($wagons) must be of type Wagon, array given, called in /in/h9X1j on line 21 and defined in /in/h9X1j:19 Stack trace: #0 /in/h9X1j(21): Train->{closure}(Array) #1 /in/h9X1j(29): Train->__construct(Array) #2 {main} thrown in /in/h9X1j on line 19
Process exited with code 255.

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