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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\Fixer\AbstractShortOperatorFixer; use PhpCsFixer\FixerDefinition\CodeSample; use PhpCsFixer\FixerDefinition\FixerDefinition; use PhpCsFixer\FixerDefinition\FixerDefinitionInterface; use PhpCsFixer\Tokenizer\Token; use PhpCsFixer\Tokenizer\Tokens; use PhpCsFixer\Tokenizer\TokensAnalyzer; final class LongToShorthandOperatorFixer extends AbstractShortOperatorFixer { /** * @var array<string, array{int, string}> */ private const OPERATORS = [ '+' => [T_PLUS_EQUAL, '+='], '-' => [T_MINUS_EQUAL, '-='], '*' => [T_MUL_EQUAL, '*='], '/' => [T_DIV_EQUAL, '/='], '&' => [T_AND_EQUAL, '&='], '.' => [T_CONCAT_EQUAL, '.='], '%' => [T_MOD_EQUAL, '%='], '|' => [T_OR_EQUAL, '|='], '^' => [T_XOR_EQUAL, '^='], ]; /** * @var list<string> */ private array $operatorTypes; private TokensAnalyzer $tokensAnalyzer; public function getDefinition(): FixerDefinitionInterface { return new FixerDefinition( 'Shorthand notation for operators should be used if possible.', [ new CodeSample("<?php\n\$i = \$i + 10;\n"), ], null, 'Risky when applying for string offsets (e.g. `<?php $text = "foo"; $text[0] = $text[0] & "\x7F";`).', ); } /** * {@inheritdoc} * * Must run before BinaryOperatorSpacesFixer, NoExtraBlankLinesFixer, NoSinglelineWhitespaceBeforeSemicolonsFixer, StandardizeIncrementFixer. */ public function getPriority(): int { return 17; } public function isRisky(): bool { return true; } public function isCandidate(Tokens $tokens): bool { if ($tokens->isAnyTokenKindsFound(array_keys(self::OPERATORS))) { return true; } // @TODO: drop condition when PHP 8.0 is required and the "&" issues went away return \defined('T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG'); } protected function applyFix(\SplFileInfo $file, Tokens $tokens): void { $this->operatorTypes = array_keys(self::OPERATORS); $this->tokensAnalyzer = new TokensAnalyzer($tokens); parent::applyFix($file, $tokens); } protected function isOperatorTokenCandidate(Tokens $tokens, int $index): bool { if (!$tokens[$index]->equalsAny($this->operatorTypes)) { return false; } while (null !== $index) { $index = $tokens->getNextMeaningfulToken($index); $otherToken = $tokens[$index]; if ($otherToken->equalsAny([';', [T_CLOSE_TAG]])) { return true; } // fast precedence check if ($otherToken->equals('?') || $otherToken->isGivenKind(T_INSTANCEOF)) { return false; } $blockType = Tokens::detectBlockType($otherToken); if (null !== $blockType) { if (false === $blockType['isStart']) { return true; } $index = $tokens->findBlockEnd($blockType['type'], $index); continue; } // precedence check if ($this->tokensAnalyzer->isBinaryOperator($index)) { return false; } } return false; // unreachable, but keeps SCA happy } protected function getReplacementToken(Token $token): Token { \assert(isset(self::OPERATORS[$token->getContent()])); // for PHPStan return new Token(self::OPERATORS[$token->getContent()]); } }
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