100 lines
3.3 KiB
PHP
100 lines
3.3 KiB
PHP
<?php declare(strict_types = 1);
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namespace SlevomatCodingStandard\Sniffs\PHP;
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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\IdentificatorHelper;
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use SlevomatCodingStandard\Helpers\TokenHelper;
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use function array_key_exists;
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use function in_array;
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use const T_AS;
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use const T_BITWISE_AND;
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use const T_COMMA;
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use const T_DOUBLE_ARROW;
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use const T_EQUAL;
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use const T_OPEN_PARENTHESIS;
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use const T_OPEN_SHORT_ARRAY;
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use const T_USE;
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class DisallowReferenceSniff implements Sniff
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{
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public const CODE_DISALLOWED_PASSING_BY_REFERENCE = 'DisallowedPassingByReference';
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public const CODE_DISALLOWED_RETURNING_REFERENCE = 'DisallowedReturningReference';
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public const CODE_DISALLOWED_INHERITING_VARIABLE_BY_REFERENCE = 'DisallowedInheritingVariableByReference';
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public const CODE_DISALLOWED_ASSIGNING_BY_REFERENCE = 'DisallowedAssigningByReference';
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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_BITWISE_AND,
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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 $referencePointer
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*/
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public function process(File $phpcsFile, $referencePointer): void
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{
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$tokens = $phpcsFile->getTokens();
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$previousPointer = TokenHelper::findPreviousEffective($phpcsFile, $referencePointer - 1);
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if (in_array($tokens[$previousPointer]['code'], TokenHelper::$functionTokenCodes, true)) {
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$phpcsFile->addError('Returning reference is disallowed.', $referencePointer, self::CODE_DISALLOWED_RETURNING_REFERENCE);
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return;
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}
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$previousParenthesisOpenerPointer = TokenHelper::findPrevious($phpcsFile, T_OPEN_PARENTHESIS, $referencePointer - 1);
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if (
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$previousParenthesisOpenerPointer !== null
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&& $tokens[$previousParenthesisOpenerPointer]['parenthesis_closer'] > $referencePointer
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) {
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if (array_key_exists('parenthesis_owner', $tokens[$previousParenthesisOpenerPointer])) {
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$parenthesisOwnerPointer = $tokens[$previousParenthesisOpenerPointer]['parenthesis_owner'];
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if (in_array($tokens[$parenthesisOwnerPointer]['code'], TokenHelper::$functionTokenCodes, true)) {
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$phpcsFile->addError(
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'Passing by reference is disallowed.',
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$referencePointer,
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self::CODE_DISALLOWED_PASSING_BY_REFERENCE
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);
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return;
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}
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}
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$pointerBeforeParenthesisOpener = TokenHelper::findPreviousEffective($phpcsFile, $previousParenthesisOpenerPointer - 1);
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if (
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$pointerBeforeParenthesisOpener !== null
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&& $tokens[$pointerBeforeParenthesisOpener]['code'] === T_USE
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) {
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$phpcsFile->addError(
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'Inheriting variable by reference is disallowed.',
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$referencePointer,
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self::CODE_DISALLOWED_INHERITING_VARIABLE_BY_REFERENCE
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);
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return;
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}
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}
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/** @var int $variableStartPointer */
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$variableStartPointer = TokenHelper::findNextEffective($phpcsFile, $referencePointer + 1);
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$variableEndPointer = IdentificatorHelper::findEndPointer($phpcsFile, $variableStartPointer);
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if ($variableEndPointer === null) {
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return;
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}
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$previousPointer = TokenHelper::findPreviousEffective($phpcsFile, $referencePointer - 1);
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if (!in_array($tokens[$previousPointer]['code'], [T_EQUAL, T_DOUBLE_ARROW, T_OPEN_SHORT_ARRAY, T_COMMA, T_AS], true)) {
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return;
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}
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$phpcsFile->addError('Assigning by reference is disallowed.', $referencePointer, self::CODE_DISALLOWED_ASSIGNING_BY_REFERENCE);
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}
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}
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