CallbackIterator.php
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CallbackIterator.php
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	<?php

	namespace MediaWiki\Extension\Notifications\Iterator;

	use Iterator;
	use IteratorDecorator;

	/**
	* Applies a callback to all values returned from the iterator
	*/
	class CallbackIterator extends IteratorDecorator {
	/** @var callable */
	protected $callable;

	public function __construct( Iterator $iterator, $callable ) {
	parent::__construct( $iterator );
	$this->callable = $callable;
	}

	public function current() {
	return call_user_func( $this->callable, $this->iterator->current() );
	}
	}

	class_alias( CallbackIterator::class, 'EchoCallbackIterator' );