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Filename : DiffElem.php

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<?php declare(strict_types = 1);

namespace PHPStan\PhpDocParser\Printer;

/**
 * Inspired by https://github.com/nikic/PHP-Parser/tree/36a6dcd04e7b0285e8f0868f44bd4927802f7df1
 *
 * Copyright (c) 2011, Nikita Popov
 * All rights reserved.
 *
 * Implements the Myers diff algorithm.
 *
 * @internal
 */
class DiffElem
{

	public const TYPE_KEEP = 0;
	public const TYPE_REMOVE = 1;
	public const TYPE_ADD = 2;
	public const TYPE_REPLACE = 3;

	/** @var self::TYPE_* */
	public $type;

	/** @var mixed Is null for add operations */
	public $old;

	/** @var mixed Is null for remove operations */
	public $new;

	/**
	 * @param self::TYPE_* $type
	 * @param mixed $old Is null for add operations
	 * @param mixed $new Is null for remove operations
	 */
	public function __construct(int $type, $old, $new)
	{
		$this->type = $type;
		$this->old = $old;
		$this->new = $new;
	}

}