71 lines
1.9 KiB
PHP
71 lines
1.9 KiB
PHP
<?php declare(strict_types = 1);
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namespace SlevomatCodingStandard\Sniffs\Variables;
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use PHP_CodeSniffer\Files\File;
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use PHP_CodeSniffer\Sniffs\Sniff;
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use SlevomatCodingStandard\Helpers\TokenHelper;
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use function in_array;
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use function sprintf;
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use const T_DOUBLE_COLON;
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use const T_EQUAL;
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use const T_OBJECT_OPERATOR;
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use const T_VARIABLE;
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class DuplicateAssignmentToVariableSniff implements Sniff
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{
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public const CODE_DUPLICATE_ASSIGNMENT = 'DuplicateAssignment';
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/**
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* @return array<int, (int|string)>
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*/
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public function register(): array
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{
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return [
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T_EQUAL,
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];
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}
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/**
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* @phpcsSuppress SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint
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* @param int $assignmentPointer
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*/
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public function process(File $phpcsFile, $assignmentPointer): void
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{
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$tokens = $phpcsFile->getTokens();
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$variablePointer = TokenHelper::findPreviousEffective($phpcsFile, $assignmentPointer - 1);
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if ($tokens[$variablePointer]['code'] !== T_VARIABLE) {
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return;
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}
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$pointerBeforeVariable = TokenHelper::findPreviousEffective($phpcsFile, $variablePointer - 1);
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if (in_array($tokens[$pointerBeforeVariable]['code'], [T_OBJECT_OPERATOR, T_DOUBLE_COLON], true)) {
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return;
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}
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/** @var int $secondVariablePointer */
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$secondVariablePointer = TokenHelper::findNextEffective($phpcsFile, $assignmentPointer + 1);
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if ($tokens[$secondVariablePointer]['code'] !== T_VARIABLE) {
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return;
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}
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if ($tokens[$variablePointer]['content'] !== $tokens[$secondVariablePointer]['content']) {
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return;
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}
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$pointerAfterSecondVariable = TokenHelper::findNextEffective($phpcsFile, $secondVariablePointer + 1);
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if ($tokens[$pointerAfterSecondVariable]['code'] !== T_EQUAL) {
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return;
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}
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$phpcsFile->addError(
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sprintf('Duplicate assignment to variable %s.', $tokens[$secondVariablePointer]['content']),
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$secondVariablePointer,
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self::CODE_DUPLICATE_ASSIGNMENT
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);
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}
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}
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