operator ?: replaced with ??

Author: dg

src/DI/Compiler.php

@@ -38,7 +38,7 @@ class Compiler
 
 	public function __construct(?ContainerBuilder $builder = null)
 	{
-		$this->builder = $builder ?: new ContainerBuilder;
+		$this->builder = $builder ?? new ContainerBuilder;
 		$this->dependencies = new DependencyChecker;
 		$this->addExtension(self::Services, new Extensions\ServicesExtension);
 		$this->addExtension(self::Parameters, new Extensions\ParametersExtension($this->configs));
@@ -113,7 +113,7 @@ public function addConfig(array $config): static
 	public function loadConfig(string $file, ?Config\Loader $loader = null): static
 	{
 		$sources = $this->sources . "// source: $file\n";
-		$loader = $loader ?: new Config\Loader;
+		$loader ??= new Config\Loader;
 		foreach ($loader->load($file, merge: false) as $data) {
 			$this->addConfig($data);
 		}

src/DI/ContainerBuilder.php

@@ -83,7 +83,7 @@ public function addDefinition(?string $name, ?Definition $definition = null): De
 			}
 		}
 
-		$definition = $definition ?: new Definitions\ServiceDefinition;
+		$definition ??= new Definitions\ServiceDefinition;
 		$definition->setName($name);
 		$definition->setNotifier(function (): void {
 			$this->needsResolve = true;

src/DI/ContainerLoader.php

@@ -105,7 +105,7 @@ protected function generate(string $class, callable $generator): array
 	{
 		$compiler = new Compiler;
 		$compiler->setClassName($class);
-		$code = $generator(...[&$compiler]) ?: $compiler->compile();
+		$code = $generator(...[&$compiler]) ?? $compiler->compile();
 		return [
 			"<?php\n$code",
 			serialize($compiler->exportDependencies()),

src/DI/Extensions/DefinitionSchema.php

@@ -151,7 +151,7 @@ private function sniffType($key, array $def): string
 	private static function getSchema(string $type): Schema
 	{
 		static $cache;
-		$cache = $cache ?: [
+		$cache ??= [
 			Definitions\ServiceDefinition::class => self::getServiceSchema(),
 			Definitions\AccessorDefinition::class => self::getAccessorSchema(),
 			Definitions\FactoryDefinition::class => self::getFactorySchema(),