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TypeColonTransformer.php
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TypeColonTransformer.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_TYPE_COLON in `function foo() : int {}`.
*
* @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
*
* @internal
*/
final class TypeColonTransformer extends AbstractTransformer
{
/**
* {@inheritdoc}
*/
public function getPriority(): int
{
// needs to run after ReturnRefTransformer and UseTransformer
// and before TypeAlternationTransformer
return -10;
}
/**
* {@inheritdoc}
*/
public function getRequiredPhpVersionId(): int
{
return 70000;
}
/**
* {@inheritdoc}
*/
public function process(Tokens $tokens, Token $token, int $index): void
{
if (!$token->equals(':')) {
return;
}
$endIndex = $tokens->getPrevMeaningfulToken($index);
if (!$tokens[$endIndex]->equals(')')) {
return;
}
$startIndex = $tokens->findBlockStart(Tokens::BLOCK_TYPE_PARENTHESIS_BRACE, $endIndex);
$prevIndex = $tokens->getPrevMeaningfulToken($startIndex);
$prevToken = $tokens[$prevIndex];
// if this could be a function name we need to take one more step
if ($prevToken->isGivenKind(T_STRING)) {
$prevIndex = $tokens->getPrevMeaningfulToken($prevIndex);
$prevToken = $tokens[$prevIndex];
}
if ($prevToken->isGivenKind([T_FUNCTION, CT::T_RETURN_REF, CT::T_USE_LAMBDA, T_FN])) {
$tokens[$index] = new Token([CT::T_TYPE_COLON, ':']);
}
}
/**
* {@inheritdoc}
*/
public function getCustomTokens(): array
{
return [CT::T_TYPE_COLON];
}
}