Class properties that have types should not require a DocBlock

Magento2/Sniffs/Commenting/ClassPropertyPHPDocFormattingSniff.php

@@ -37,6 +37,16 @@ class ClassPropertyPHPDocFormattingSniff extends AbstractVariableSniff
      */
     private $PHPDocFormattingValidator;
 
+    /**
+     * @var array
+     */
+    private $invalidTypes = [
+        'null',
+        'false',
+        'true',
+        'self'
+    ];
+
     /**
      * Constructs an ClassPropertyPHPDocFormattingSniff.
      */
@@ -62,7 +72,15 @@ public function processMemberVar(File $phpcsFile, $stackPtr)
         );
 
         if ($commentEnd === false || $tokens[$commentEnd]['code'] !== T_DOC_COMMENT_CLOSE_TAG) {
-            $phpcsFile->addWarning('Missing PHP DocBlock for class property.', $stackPtr, 'Missing');
+            // if the property has a valid type definition, we don't require a doc block
+            if (!$this->hasValidType($phpcsFile, $stackPtr)) {
+                $phpcsFile->addWarning(
+                    'Missing PHP DocBlock for class property without valid type.',
+                    $stackPtr,
+                    'Missing'
+                );
+            }
+            // no comment, so nothing further to process
             return;
         }
 
@@ -143,6 +161,30 @@ public function processMemberVar(File $phpcsFile, $stackPtr)
         $this->processPropertyShortDescription($phpcsFile, $stackPtr, $varAnnotationPosition, $commentStart);
     }
 
+    /**
+     * Check if class property has a valid (not specifically invalid) type
+     *
+     * @param File $phpcsFile
+     * @param int $propertyPosition
+     * @return bool
+     */
+    private function hasValidType(File $phpcsFile, int $propertyPosition): bool
+    {
+        // type token should be 2 before property. If not present, visibility token should be in its place
+        $typePosition = $phpcsFile->findPrevious(
+            [T_STRING],
+            $propertyPosition,
+            $propertyPosition - 2
+        );
+
+        if (!$typePosition) {
+            return false;
+        }
+
+        $type = $phpcsFile->getTokensAsString($typePosition, 1);
+        return !in_array(strtolower($type), $this->invalidTypes);
+    }
+
     /**
      * Check if class has already have meaningful description before var tag
      *

Magento2/Tests/Commenting/ClassPropertyPHPDocFormattingUnitTest.inc

@@ -194,4 +194,17 @@ class correctlyFormattedClassMemberDocBlock
      * @see Message with some reference
      */
     protected string $itIsCorrect;
+    private string $typedPropertyWithoutComment;
+
+    private string $typedPropertyWithoutComment2;
+
+    private ?string $typedPropertyWithoutComment3;
+
+    private string|int $typedPropertyWithoutComment4;
+
+    private Test $typedPropertyWithoutComment5;
+
+    private Test|Test2 $typedPropertyWithoutComment6;
+
+    private ?Test $typedPropertyWithoutComment7;    
 }