NegationOperatorSpacingSniff: Fixed false positive

Author: kukulich

SlevomatCodingStandard/Sniffs/Operators/NegationOperatorSpacingSniff.php

@@ -4,6 +4,7 @@
 
 use PHP_CodeSniffer\Files\File;
 use PHP_CodeSniffer\Sniffs\Sniff;
+use SlevomatCodingStandard\Helpers\IdentificatorHelper;
 use SlevomatCodingStandard\Helpers\SniffSettingsHelper;
 use SlevomatCodingStandard\Helpers\TokenHelper;
 use function array_merge;
@@ -68,6 +69,11 @@ public function process(File $phpcsFile, $pointer): void
 			return;
 		}
 
+		$possibleVariableStartPointer = IdentificatorHelper::findStartPointer($phpcsFile, $previousEffective);
+		if ($possibleVariableStartPointer !== null) {
+			return;
+		}
+
 		$whitespacePointer = $pointer + 1;
 
 		$numberOfSpaces = $tokens[$whitespacePointer]['code'] !== T_WHITESPACE ? 0 : strlen($tokens[$whitespacePointer]['content']);

tests/Sniffs/Operators/data/negationOperatorSpacingNoErrors.php

@@ -104,3 +104,4 @@ function(){yield -$b;};
 $a = [$a, -$b];
 $a = $a[-$b];
 $a = $a ? -$b : -$b;
+$a = (int) $b->{'foo'} - (int) $b->{'bar'};