RequireOnlyStandaloneIncrementAndDecrementOperatorsSniff: Fixed false positives

Author: kukulich

SlevomatCodingStandard/Helpers/IdentificatorHelper.php

@@ -120,7 +120,7 @@ private static function getStartPointerBeforeVariablePart(File $phpcsFile, int $
 			return self::getStartPointerBeforeVariablePart($phpcsFile, $tokens[$previousPointer]['bracket_opener']);
 		}
 
-		if ($tokens[$previousPointer]['code'] === T_VARIABLE) {
+		if (in_array($tokens[$previousPointer]['code'], [T_VARIABLE, T_STRING], true)) {
 			return self::getStartPointerBeforeVariablePart($phpcsFile, $previousPointer);
 		}
 

tests/Sniffs/Operators/data/requireOnlyStandaloneIncrementAndDecrementOperatorsNoErrors.php

@@ -35,3 +35,5 @@ function ($x) {
 ++$a['a'];
 $a['a']--;
 --$a['a'];
+
+$this->typeCounter[$value]++;