Property can be abstract / final

readme.md

@@ -699,6 +699,21 @@ class Demo
 }
 ```
 
+Properties and property hooks can be abstract or final:
+
+```php
+$class->addProperty('id')
+    ->setType('int')
+    ->addHook('get')
+        ->setAbstract();
+
+$class->addProperty('role')
+    ->setType('string')
+    ->addHook('set', 'strtolower($value)')
+        ->setFinal();
+```
+
+
  <!---->
 
 Namespace

src/PhpGenerator/ClassManipulator.php

@@ -116,7 +116,7 @@ private function implementMethod(\ReflectionMethod $rm): Method
 	private function implementProperty(\ReflectionProperty $rp): Property
 	{
 		$property = (new Factory)->fromPropertyReflection($rp);
-		$property->setHooks([]);
+		$property->setHooks([])->setAbstract(false);
 		$this->class->addMember($property);
 		return $property;
 	}

src/PhpGenerator/Printer.php

@@ -380,12 +380,14 @@ private function printProperty(Property $property, bool $readOnlyClass = false,
 	{
 		$property->validate();
 		$type = $property->getType();
-		$def = (($property->getVisibility() ?: 'public')
+		$def = ($property->isAbstract() && !$isInterface ? 'abstract ' : '')
+			. ($property->isFinal() ? 'final ' : '')
+			. ($property->getVisibility() ?: 'public')
 			. ($property->isStatic() ? ' static' : '')
 			. (!$readOnlyClass && $property->isReadOnly() && $type ? ' readonly' : '')
 			. ' '
 			. ltrim($this->printType($type, $property->isNullable()) . ' ')
-			. '$' . $property->getName());
+			. '$' . $property->getName();
 
 		$defaultValue = $property->getValue() === null && !$property->isInitialized()
 			? ''

src/PhpGenerator/Property.php

@@ -28,6 +28,8 @@ final class Property
 	private ?string $type = null;
 	private bool $nullable = false;
 	private bool $initialized = false;
+	private bool $final = false;
+	private bool $abstract = false;
 
 
 	public function setValue(mixed $val): static
@@ -99,11 +101,46 @@ public function isInitialized(): bool
 	}
 
 
+	public function setFinal(bool $state = true): static
+	{
+		$this->final = $state;
+		return $this;
+	}
+
+
+	public function isFinal(): bool
+	{
+		return $this->final;
+	}
+
+
+	public function setAbstract(bool $state = true): static
+	{
+		$this->abstract = $state;
+		return $this;
+	}
+
+
+	public function isAbstract(): bool
+	{
+		return $this->abstract;
+	}
+
+
 	/** @throws Nette\InvalidStateException */
 	public function validate(): void
 	{
 		if ($this->readOnly && !$this->type) {
 			throw new Nette\InvalidStateException("Property \$$this->name: Read-only properties are only supported on typed property.");
+
+		} elseif ($this->abstract && $this->final) {
+			throw new Nette\InvalidStateException("Property \$$this->name cannot be abstract and final at the same time.");
+
+		} elseif (
+			$this->abstract
+			&& !Nette\Utils\Arrays::some($this->getHooks(), fn($hook) => $hook->isAbstract())
+		) {
+			throw new Nette\InvalidStateException("Property \$$this->name: Abstract property must have at least one abstract hook.");
 		}
 	}
 

tests/PhpGenerator/Property.abstract-final.phpt

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * Test: PHP 8.4 abstract/final property
+ */
+
+declare(strict_types=1);
+
+use Nette\PhpGenerator\ClassType;
+
+require __DIR__ . '/../bootstrap.php';
+
+
+$class = (new ClassType('Demo'))
+	->setAbstract();
+
+$class->addProperty('first')
+	->setType('string')
+	->setAbstract()
+	->addHook('set')
+		->setAbstract();
+
+$prop = $class->addProperty('second')
+	->setType('string')
+	->setAbstract();
+
+$prop->addHook('set')
+	->setAbstract();
+
+$prop->addHook('get', '123');
+
+$class->addProperty('third')
+	->setFinal();
+
+same(<<<'XX'
+	abstract class Demo
+	{
+		abstract public string $first { set; }
+
+		abstract public string $second {
+			set;
+			get => 123;
+		}
+
+		final public $third;
+	}
+
+	XX, (string) $class);

tests/PhpGenerator/Property.validate.phpt

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+use Nette\PhpGenerator\Property;
+use Tester\Assert;
+
+require __DIR__ . '/../bootstrap.php';
+
+
+Assert::exception(function () {
+	$property = new Property('a');
+	$property->setFinal()->setAbstract();
+	$property->validate();
+}, Nette\InvalidStateException::class, 'Property $a cannot be abstract and final at the same time.');
+
+Assert::exception(function () {
+	$property = new Property('a');
+	$property->setAbstract();
+	$property->validate();
+}, Nette\InvalidStateException::class, 'Property $a: Abstract property must have at least one abstract hook.');