PhpStan fixes (#214)

* Compiler: Add check type of defined extensions

* ContainerBuilder: Annotation hack for error: 'Call to function is_int() with string|null will always evaluate to false.'.

* addDefinition() can return base Definition

* FactoryDefinition::getResultDefinition() can return Definition

* ServiceDefinition::getEntity() can return Reference

* Nette\DI\Definitions\Definition::getFactory(): Fix undefined method

* Nette\DI\Definitions\Definition::getFactory(): Add check if ServiceDefinition.

* FactoryDefinition: completeParameters(): resultDefinition must be type of ServiceDefinition.

* Add given type

* ExtensionsExtension: Check CompilerExtension type

* Fix conflict

* ExtensionsExtension: Redundant empty line

* Compiler: Extension should be ParametersExtension.

* FactoryDefinition: Revert old implementation.

* ConBuilder: Remove Def. anotation + fix number detection.

* ConBuilder: Fix numeric string detection

* ConBuilder: Add support for starting with zero.

* ConBuilder: Add support for zero

* Compiler: Add assert() type check.

* Compiler: Revert isset DI index check.

src/DI/Compiler.php

@@ -149,7 +149,9 @@ public function getConfig(): array
 	 */
 	public function setDynamicParameterNames(array $names)
 	{
-		$this->extensions[self::PARAMETERS]->dynamicParams = $names;
+		$extension = $this->extensions[self::PARAMETERS];
+		assert($extension instanceof Nette\DI\Extensions\ParametersExtension);
+		$extension->dynamicParams = $names;
 		return $this;
 	}
 
@@ -181,6 +183,7 @@ public function exportDependencies(): array
 	public function addExportedTag(string $tag)
 	{
 		if (isset($this->extensions[self::DI])) {
+			assert($this->extensions[self::DI] instanceof Nette\DI\Extensions\DIExtension);
 			$this->extensions[self::DI]->exportedTags[$tag] = true;
 		}
 		return $this;
@@ -193,6 +196,7 @@ public function addExportedTag(string $tag)
 	public function addExportedType(string $type)
 	{
 		if (isset($this->extensions[self::DI])) {
+			assert($this->extensions[self::DI] instanceof Nette\DI\Extensions\DIExtension);
 			$this->extensions[self::DI]->exportedTypes[$type] = true;
 		}
 		return $this;

src/DI/ContainerBuilder.php

@@ -64,7 +64,7 @@ public function addDefinition(?string $name, Definition $definition = null): Def
 			for ($i = 1; isset($this->definitions['0' . $i]) || isset($this->aliases['0' . $i]); $i++);
 			$name = '0' . $i; // prevents converting to integer in array key
 
-		} elseif (is_int(key([$name => 1])) || !preg_match('#^\w+(\.\w+)*$#D', $name)) {
+		} elseif (preg_match('#^[+-]?([1-9]\d*|0)\z#', $name) || !preg_match('#^\w+(\.\w+)*$#D', $name)) {
 			throw new Nette\InvalidArgumentException(sprintf('Service name must be a alpha-numeric string and not a number, %s given.', gettype($name)));
 
 		} else {

src/DI/Definitions/ServiceDefinition.php

@@ -80,7 +80,7 @@ public function getFactory(): Statement
 
 
 	/**
-	 * @return string|array|Definition|null
+	 * @return string|array|Definition|Reference|null
 	 */
 	public function getEntity()
 	{