PhutilArray.php
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	<?php

	/**
	* Abstract base class for implementing objects that behave like arrays. This
	* class wraps a basic array and provides trivial implementations for
	* `Countable`, `ArrayAccess` and `Iterator`, so subclasses need only implement
	* specializations.
	*/
	abstract class PhutilArray
	extends Phobject
	implements Countable, ArrayAccess, Iterator {

	protected $data = array();


	public function __construct(array $initial_value = array()) {
	$this->data = $initial_value;
	}


	/* -( Conversion )--------------------------------------------------------- */


	public function toArray() {
	return iterator_to_array($this, true);
	}


	/* -( Countable Interface )------------------------------------------------ */


	public function count() {
	return count($this->data);
	}


	/* -( Iterator Interface )------------------------------------------------- */


	public function current() {
	return current($this->data);
	}

	public function key() {
	return key($this->data);
	}

	public function next() {
	return next($this->data);
	}

	public function rewind() {
	reset($this->data);
	}

	public function valid() {
	return (key($this->data) !== null);
	}


	/* -( ArrayAccess Interface )---------------------------------------------- */


	public function offsetExists($key) {
	return array_key_exists($key, $this->data);
	}

	public function offsetGet($key) {
	return $this->data[$key];
	}

	public function offsetSet($key, $value) {
	$this->data[$key] = $value;
	}

	public function offsetUnset($key) {
	unset($this->data[$key]);
	}

	}