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UnusedInheritedVariablePassedToClosureSniff.php
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<?php declare(strict_types = 1); namespace SlevomatCodingStandard\Sniffs\Functions; use PHP_CodeSniffer\Files\File; use PHP_CodeSniffer\Sniffs\Sniff; use SlevomatCodingStandard\Helpers\FixerHelper; use SlevomatCodingStandard\Helpers\TokenHelper; use SlevomatCodingStandard\Helpers\VariableHelper; use function in_array; use function sprintf; use const T_BITWISE_AND; use const T_CLOSE_PARENTHESIS; use const T_CLOSURE; use const T_COMMA; use const T_OPEN_PARENTHESIS; use const T_USE; use const T_VARIABLE; class UnusedInheritedVariablePassedToClosureSniff implements Sniff { public const CODE_UNUSED_INHERITED_VARIABLE = 'UnusedInheritedVariable'; /** * @return array<int, (int|string)> */ public function register(): array { return [ T_USE, ]; } /** * @phpcsSuppress SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint * @param int $usePointer */ public function process(File $phpcsFile, $usePointer): void { $tokens = $phpcsFile->getTokens(); /** @var int $parenthesisOpenerPointer */ $parenthesisOpenerPointer = TokenHelper::findNextEffective($phpcsFile, $usePointer + 1); if ($tokens[$parenthesisOpenerPointer]['code'] !== T_OPEN_PARENTHESIS) { return; } /** @var int $closurePointer */ $closurePointer = TokenHelper::findPrevious($phpcsFile, T_CLOSURE, $usePointer - 1); $currentPointer = $parenthesisOpenerPointer + 1; do { $variablePointer = TokenHelper::findNext( $phpcsFile, T_VARIABLE, $currentPointer, $tokens[$parenthesisOpenerPointer]['parenthesis_closer'], ); if ($variablePointer === null) { break; } $this->checkVariableUsage( $phpcsFile, $usePointer, $parenthesisOpenerPointer, $tokens[$parenthesisOpenerPointer]['parenthesis_closer'], $variablePointer, $closurePointer, ); $currentPointer = $variablePointer + 1; } while (true); } private function checkVariableUsage( File $phpcsFile, int $usePointer, int $useParenthesisOpenerPointer, int $useParenthesisCloserPointer, int $variablePointer, int $scopeOwnerPointer ): void { $tokens = $phpcsFile->getTokens(); if (VariableHelper::isUsedInScope($phpcsFile, $scopeOwnerPointer, $variablePointer)) { return; } $fix = $phpcsFile->addFixableError( sprintf('Unused inherited variable %s passed to closure.', $tokens[$variablePointer]['content']), $variablePointer, self::CODE_UNUSED_INHERITED_VARIABLE, ); if (!$fix) { return; } $fixStartPointer = $variablePointer; do { if ($tokens[$fixStartPointer - 1]['code'] === T_OPEN_PARENTHESIS) { break; } $fixStartPointer--; if ($tokens[$fixStartPointer]['code'] === T_COMMA) { break; } } while (true); $fixEndPointer = $variablePointer; do { if ($tokens[$fixEndPointer + 1]['code'] === T_CLOSE_PARENTHESIS) { break; } if ($tokens[$fixEndPointer + 1]['code'] === T_COMMA && $tokens[$fixStartPointer]['code'] === T_COMMA) { break; } if (in_array($tokens[$fixEndPointer + 1]['code'], [T_VARIABLE, T_BITWISE_AND], true)) { break; } $fixEndPointer++; } while (true); $phpcsFile->fixer->beginChangeset(); FixerHelper::removeBetweenIncluding($phpcsFile, $fixStartPointer, $fixEndPointer); $emptyUse = true; for ($i = $useParenthesisOpenerPointer + 1; $i < $useParenthesisCloserPointer; $i++) { if ($phpcsFile->fixer->getTokenContent($i) !== '') { $emptyUse = false; break; } } if ($emptyUse) { FixerHelper::removeBetweenIncluding($phpcsFile, $usePointer, $useParenthesisCloserPointer); } $phpcsFile->fixer->endChangeset(); } }
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