ReturnArgument.php

<?php

declare (strict_types=1);

/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PHPUnit\Framework\MockObject\Stub;

use PHPUnit\Framework\MockObject\Invocation;

/**
 * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
 *
 * @internal This class is not covered by the backward compatibility promise for PHPUnit
 */
final class ReturnArgument implements Stub {
    private readonly int $argumentIndex;
    public function __construct(int $argumentIndex) {
        $this->argumentIndex = $argumentIndex;
    }
    public function invoke(Invocation $invocation) : mixed {
        return $invocation->parameters()[$this->argumentIndex] ?? null;
    }

}