constructorAssignDetector = $constructorAssignDetector; $this->phpDocInfoFactory = $phpDocInfoFactory; } public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Add null default to properties with PHP 7.4 property nullable type', [new CodeSample(<<<'CODE_SAMPLE' class SomeClass { public ?string $name; } CODE_SAMPLE , <<<'CODE_SAMPLE' class SomeClass { public ?string $name = null; } CODE_SAMPLE )]); } /** * @return array> */ public function getNodeTypes() : array { return [Class_::class]; } /** * @param Class_ $node */ public function refactor(Node $node) : ?Node { if ($this->isReadonlyClass($node)) { return null; } $hasChanged = \false; foreach ($node->getProperties() as $property) { if ($this->shouldSkip($property, $node)) { continue; } $onlyProperty = $property->props[0]; $onlyProperty->default = $this->nodeFactory->createNull(); $hasChanged = \true; } if ($hasChanged) { return $node; } return null; } public function provideMinPhpVersion() : int { return PhpVersionFeature::TYPED_PROPERTIES; } private function shouldSkip(Property $property, Class_ $class) : bool { if ($property->type === null) { return \true; } if (\count($property->props) > 1) { return \true; } $onlyProperty = $property->props[0]; if ($onlyProperty->default instanceof Expr) { return \true; } if ($this->isReadonlyProperty($property)) { return \true; } if (!$this->nodeTypeResolver->isNullableType($property)) { return \true; } // is variable assigned in constructor $propertyName = $this->getName($property); return $this->constructorAssignDetector->isPropertyAssigned($class, $propertyName); } private function isReadonlyProperty(Property $property) : bool { // native readonly if ($property->isReadonly()) { return \true; } // @readonly annotation $phpDocInfo = $this->phpDocInfoFactory->createFromNodeOrEmpty($property); return $phpDocInfo->hasByName('@readonly'); } private function isReadonlyClass(Class_ $class) : bool { // native readonly if ($class->isReadonly()) { return \true; } // @immutable annotation $phpDocInfo = $this->phpDocInfoFactory->createFromNodeOrEmpty($class); return $phpDocInfo->hasByName('@immutable'); } }