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<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Composer\DependencyResolver;
use Composer\Package\PackageInterface;
use Composer\Semver\Constraint\Constraint;
/**
* @author Nils Adermann <naderman@naderman.de>
*/
interface PolicyInterface
{
/**
* @param string $operator
* @return bool
*
* @phpstan-param Constraint::STR_OP_* $operator
*/
public function versionCompare(PackageInterface $a, PackageInterface $b, $operator);
/**
* @param int[] $literals
* @param ?string $requiredPackage
* @return int[]
*/
public function selectPreferredPackages(Pool $pool, array $literals, $requiredPackage = null);
}