110 lines
3.2 KiB
PHP
110 lines
3.2 KiB
PHP
<?php
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/**
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* PHPCompatibility, an external standard for PHP_CodeSniffer.
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*
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* @package PHPCompatibility
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* @copyright 2012-2019 PHPCompatibility Contributors
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* @license https://opensource.org/licenses/LGPL-3.0 LGPL3
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* @link https://github.com/PHPCompatibility/PHPCompatibility
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*/
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namespace PHPCompatibility\Sniffs\Operators;
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use PHPCompatibility\Sniff;
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use PHPCompatibility\PHPCSHelper;
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use PHP_CodeSniffer_File as File;
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use PHP_CodeSniffer_Tokens as Tokens;
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/**
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* Bitwise shifts by negative number will throw an ArithmeticError since PHP 7.0.
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*
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* PHP version 7.0
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*
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* @link https://wiki.php.net/rfc/integer_semantics
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* @link https://www.php.net/manual/en/migration70.incompatible.php#migration70.incompatible.integers.negative-bitshift
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*
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* @since 7.0.0
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*/
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class ForbiddenNegativeBitshiftSniff extends Sniff
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{
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/**
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* Potential end tokens for which the end pointer has to be set back by one.
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*
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* {@internal The PHPCS `findEndOfStatement()` method is not completely consistent
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* in how it returns the statement end. This is just a simple way to bypass
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* the inconsistency for our purposes.}
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*
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* @since 8.2.0
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*
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* @var array
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*/
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private $inclusiveStopPoints = array(
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\T_COLON => true,
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\T_COMMA => true,
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\T_DOUBLE_ARROW => true,
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\T_SEMICOLON => true,
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);
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/**
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* Returns an array of tokens this test wants to listen for.
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*
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* @since 7.0.0
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* @since 8.2.0 Now registers all bitshift tokens, not just bitshift right (`T_SR`).
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*
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* @return array
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*/
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public function register()
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{
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return array(
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\T_SL,
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\T_SL_EQUAL,
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\T_SR,
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\T_SR_EQUAL,
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);
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}
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/**
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* Processes this test, when one of its tokens is encountered.
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*
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* @since 7.0.0
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*
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* @param \PHP_CodeSniffer_File $phpcsFile The file being scanned.
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* @param int $stackPtr The position of the current token
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* in the stack passed in $tokens.
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*
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* @return void
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*/
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public function process(File $phpcsFile, $stackPtr)
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{
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if ($this->supportsAbove('7.0') === false) {
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return;
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}
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$tokens = $phpcsFile->getTokens();
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// Determine the start and end of the part of the statement we need to examine.
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$start = ($stackPtr + 1);
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$next = $phpcsFile->findNext(Tokens::$emptyTokens, $start, null, true);
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if ($next !== false && $tokens[$next]['code'] === \T_OPEN_PARENTHESIS) {
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$start = ($next + 1);
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}
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$end = PHPCSHelper::findEndOfStatement($phpcsFile, $start);
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if (isset($this->inclusiveStopPoints[$tokens[$end]['code']]) === true) {
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--$end;
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}
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if ($this->isNegativeNumber($phpcsFile, $start, $end, true) !== true) {
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// Not a negative number or undetermined.
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return;
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}
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$phpcsFile->addError(
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'Bitwise shifts by negative number will throw an ArithmeticError in PHP 7.0. Found: %s',
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$stackPtr,
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'Found',
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array($phpcsFile->getTokensAsString($start, ($end - $start + 1)))
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);
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}
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}
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