Overriding property - when overriding readable property, the property has to be readable (same for writable)

Author: ondrejmirtes

src/Rules/Properties/OverridingPropertyRule.php

@@ -88,6 +88,32 @@ public function processNode(Node $node, Scope $scope): array
 			}
 		}
 
+		$propertyReflection = $classReflection->getNativeProperty($node->getName());
+		if ($this->phpVersion->supportsPropertyHooks()) {
+			if ($prototype->isReadable()) {
+				if (!$propertyReflection->isReadable()) {
+					$errors[] = RuleErrorBuilder::message(sprintf(
+						'Property %s::$%s overriding readable property %s::$%s also has to be readable.',
+						$classReflection->getDisplayName(),
+						$node->getName(),
+						$prototype->getDeclaringClass()->getDisplayName(),
+						$node->getName(),
+					))->identifier('property.notReadable')->nonIgnorable()->build();
+				}
+			}
+			if ($prototype->isWritable()) {
+				if (!$propertyReflection->isWritable()) {
+					$errors[] = RuleErrorBuilder::message(sprintf(
+						'Property %s::$%s overriding writable property %s::$%s also has to be writable.',
+						$classReflection->getDisplayName(),
+						$node->getName(),
+						$prototype->getDeclaringClass()->getDisplayName(),
+						$node->getName(),
+					))->identifier('property.notWritable')->nonIgnorable()->build();
+				}
+			}
+		}
+
 		if ($prototype->isPublic()) {
 			if (!$node->isPublic()) {
 				$errors[] = RuleErrorBuilder::message(sprintf(
@@ -198,7 +224,6 @@ public function processNode(Node $node, Scope $scope): array
 			return $errors;
 		}
 
-		$propertyReflection = $classReflection->getNativeProperty($node->getName());
 		if ($prototype->getReadableType()->equals($propertyReflection->getReadableType())) {
 			return $errors;
 		}

tests/PHPStan/Rules/Properties/OverridingPropertyRuleTest.php

@@ -216,6 +216,18 @@ public function testPropertyPrototypeFromInterface(): void
 				'Type string of property Bug12466\Bar::$a is not the same as type int of overridden property Bug12466\Foo::$a.',
 				15,
 			],
+			[
+				'Property Bug12466\TestMoreProps::$a overriding writable property Bug12466\MoreProps::$a also has to be writable.',
+				34,
+			],
+			[
+				'Property Bug12466\TestMoreProps::$b overriding readable property Bug12466\MoreProps::$b also has to be readable.',
+				41,
+			],
+			[
+				'Property Bug12466\TestMoreProps::$c overriding writable property Bug12466\MoreProps::$c also has to be writable.',
+				48,
+			],
 		]);
 	}
 

tests/PHPStan/Rules/Properties/data/property-prototype-from-interface.php

@@ -15,3 +15,40 @@ class Bar implements Foo
 	public string $a;
 
 }
+
+interface MoreProps
+{
+
+	public int $a { get; set; }
+
+	public int $b { get; }
+
+	public int $c { set; }
+
+}
+
+class TestMoreProps implements MoreProps
+{
+
+	// not writable
+	public int $a {
+		get {
+			return 1;
+		}
+	}
+
+	// not readable
+	public int $b {
+		set {
+			$this->a = 1;
+		}
+	}
+
+	// not writable
+	public int $c {
+		get {
+			return 1;
+		}
+	}
+
+}