SlevomatCodingStandard.Complexity.Cognitive: Fixed internal error for closures

Author: kukulich

SlevomatCodingStandard/Sniffs/Complexity/CognitiveSniff.php

@@ -153,7 +153,9 @@ public function process(File $phpcsFile, int $stackPtr): void
 			return;
 		}
 
-		$name = $phpcsFile->getDeclarationName($stackPtr);
+		$name = $phpcsFile->getTokens()[$stackPtr]['code'] === T_FUNCTION
+			? FunctionHelper::getName($phpcsFile, $stackPtr)
+			: 'anonymous function';
 
 		$errorParameters = [
 			'Cognitive complexity for "%s" is %d but has to be less than or equal to %d.',

tests/Sniffs/Complexity/CognitiveSniffTest.php

@@ -51,6 +51,12 @@ public static function dataProviderFiles(): array
 				'overriddenSymbolFrom',
 				19,
 			],
+			[
+				__DIR__ . '/data/cognitive/nesting3.php',
+				3,
+				'anonymous function',
+				19,
+			],
 			[
 				__DIR__ . '/data/cognitive/nestingContinueWithLabel.php',
 				3,

tests/Sniffs/Complexity/data/cognitive/nesting3.php

@@ -0,0 +1,35 @@
+<?php
+
+function (ClassJavaType $classType) {
+	if (true) { // +1
+		return $Symbols->unknownMethodSymbol();
+	}
+
+	$unknownFound = false;
+
+	$symbols = $classType->getSymbol()->members()->lookup(name);
+
+	foreach ($symbols as $symbol) { // +1
+		if ($overrideSymbol->isKind(MTH) // +2 (nesting = 1)
+			&& !$overrideSymbol->isStatic()) { // +1
+
+			if (canOverride($methodJavaSymbol)) { // +3 (nesting = 2)
+				$overriding = checkOverridingParameters($methodJavaSymbol, $classType);
+
+				if ($overriding === null) { // +4 (nesting = 3)
+					if (!$unknownFound) { // +5 (nesting = 4)
+						$unknownFound = true;
+					}
+				} elseif ($overriding) { // +1
+					return $methodJavaSymbol;
+				}
+			}
+		}
+	}
+
+	if ($unknownFound) { // +1
+		return $symbols->unknownMethodSymbol;
+	}
+
+	return null;
+};