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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\Fixer\Operator; use PhpCsFixer\AbstractFixer; use PhpCsFixer\FixerDefinition\FixerDefinition; use PhpCsFixer\FixerDefinition\FixerDefinitionInterface; use PhpCsFixer\FixerDefinition\VersionSpecification; use PhpCsFixer\FixerDefinition\VersionSpecificCodeSample; use PhpCsFixer\Tokenizer\Token; use PhpCsFixer\Tokenizer\Tokens; final class NoUselessNullsafeOperatorFixer extends AbstractFixer { public function getDefinition(): FixerDefinitionInterface { return new FixerDefinition( 'There should not be useless Null-safe operator `?->` used.', [ new VersionSpecificCodeSample( '<?php class Foo extends Bar { public function test() { echo $this?->parentMethod(); } } ', new VersionSpecification(8_00_00) ), ] ); } public function isCandidate(Tokens $tokens): bool { return \PHP_VERSION_ID >= 8_00_00 && $tokens->isAllTokenKindsFound([T_VARIABLE, T_NULLSAFE_OBJECT_OPERATOR]); } protected function applyFix(\SplFileInfo $file, Tokens $tokens): void { for ($index = $tokens->count() - 1; $index >= 0; --$index) { if (!$tokens[$index]->isGivenKind(T_NULLSAFE_OBJECT_OPERATOR)) { continue; } $nullsafeObjectOperatorIndex = $index; $index = $tokens->getPrevMeaningfulToken($index); if (!$tokens[$index]->isGivenKind(T_VARIABLE)) { continue; } if ('$this' !== strtolower($tokens[$index]->getContent())) { continue; } $tokens[$nullsafeObjectOperatorIndex] = new Token([T_OBJECT_OPERATOR, '->']); } } }
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