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ReturnRefTransformer.php
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ReturnRefTransformer.php
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<?php
declare(strict_types=1);
/*
* This file is part of PHP CS Fixer.
*
* (c) Fabien Potencier <fabien@symfony.com>
* Dariusz Rumiński <dariusz.ruminski@gmail.com>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace PhpCsFixer\Tokenizer\Transformer;
use PhpCsFixer\Tokenizer\AbstractTransformer;
use PhpCsFixer\Tokenizer\CT;
use PhpCsFixer\Tokenizer\Token;
use PhpCsFixer\Tokenizer\Tokens;
/**
* Transform `&` operator into CT::T_RETURN_REF in `function & foo() {}`.
*
* @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
*
* @internal
*/
final class ReturnRefTransformer extends AbstractTransformer
{
/**
* {@inheritdoc}
*/
public function getRequiredPhpVersionId(): int
{
return 50000;
}
/**
* {@inheritdoc}
*/
public function process(Tokens $tokens, Token $token, int $index): void
{
$prevKinds = [T_FUNCTION];
if (\PHP_VERSION_ID >= 70400) {
$prevKinds[] = T_FN;
}
if ($token->equals('&') && $tokens[$tokens->getPrevMeaningfulToken($index)]->isGivenKind($prevKinds)) {
$tokens[$index] = new Token([CT::T_RETURN_REF, '&']);
}
}
/**
* {@inheritdoc}
*/
public function getCustomTokens(): array
{
return [CT::T_RETURN_REF];
}
}