[DependencyInjection] Fix generating adapters of functional interfaces

Author: nicolas-grekas

src/Symfony/Component/DependencyInjection/Argument/LazyClosure.php

@@ -40,22 +40,22 @@ public function __get(mixed $name): mixed
         }
 
         if (isset($this->initializer)) {
-            $this->service = ($this->initializer)();
+            if (\is_string($service = ($this->initializer)())) {
+                $service = (new \ReflectionClass($service))->newInstanceWithoutConstructor();
+            }
+            $this->service = $service;
             unset($this->initializer);
         }
 
         return $this->service;
     }
 
-    public static function getCode(string $initializer, array $callable, Definition $definition, ContainerBuilder $container, ?string $id): string
+    public static function getCode(string $initializer, array $callable, string $class, ContainerBuilder $container, ?string $id): string
     {
         $method = $callable[1];
-        $asClosure = 'Closure' === ($definition->getClass() ?: 'Closure');
 
-        if ($asClosure) {
+        if ($asClosure = 'Closure' === $class) {
             $class = ($callable[0] instanceof Reference ? $container->findDefinition($callable[0]) : $callable[0])->getClass();
-        } else {
-            $class = $definition->getClass();
         }
 
         $r = $container->getReflectionClass($class);

src/Symfony/Component/DependencyInjection/ContainerBuilder.php

@@ -1060,14 +1060,15 @@ private function createService(Definition $definition, array &$inlineServices, b
             }
 
             if (\is_array($callable) && (
-                $callable[0] instanceof Reference
+                'Closure' !== $class
+                || $callable[0] instanceof Reference
                 || $callable[0] instanceof Definition && !isset($inlineServices[spl_object_hash($callable[0])])
             )) {
                 $initializer = function () use ($callable, &$inlineServices) {
                     return $this->doResolveServices($callable[0], $inlineServices);
                 };
 
-                $proxy = eval('return '.LazyClosure::getCode('$initializer', $callable, $definition, $this, $id).';');
+                $proxy = eval('return '.LazyClosure::getCode('$initializer', $callable, $class, $this, $id).';');
                 $this->shareService($definition, $proxy, $id, $inlineServices);
 
                 return $proxy;

src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php

@@ -1202,13 +1202,13 @@ private function addNewInstance(Definition $definition, string $return = '', ?st
                 throw new RuntimeException(sprintf('Cannot dump definition because of invalid factory method (%s).', $callable[1] ?: 'n/a'));
             }
 
-            if (['...'] === $arguments && ($definition->isLazy() || 'Closure' !== ($definition->getClass() ?? 'Closure')) && (
+            if (['...'] === $arguments && ('Closure' !== ($class = $definition->getClass() ?: 'Closure') || $definition->isLazy() && (
                 $callable[0] instanceof Reference
                 || ($callable[0] instanceof Definition && !$this->definitionVariables->contains($callable[0]))
-            )) {
+            ))) {
                 $initializer = 'fn () => '.$this->dumpValue($callable[0]);
 
-                return $return.LazyClosure::getCode($initializer, $callable, $definition, $this->container, $id).$tail;
+                return $return.LazyClosure::getCode($initializer, $callable, $class, $this->container, $id).$tail;
             }
 
             if ($callable[0] instanceof Reference

src/Symfony/Component/DependencyInjection/Tests/Argument/LazyClosureTest.php

@@ -34,23 +34,23 @@ public function testThrowsWhenNotUsingInterface()
         $this->expectException(\RuntimeException::class);
         $this->expectExceptionMessage('Cannot create adapter for service "foo" because "Symfony\Component\DependencyInjection\Tests\Argument\LazyClosureTest" is not an interface.');
 
-        LazyClosure::getCode('foo', [new \stdClass(), 'bar'], new Definition(LazyClosureTest::class), new ContainerBuilder(), 'foo');
+        LazyClosure::getCode('foo', [new \stdClass(), 'bar'], LazyClosureTest::class, new ContainerBuilder(), 'foo');
     }
 
     public function testThrowsOnNonFunctionalInterface()
     {
         $this->expectException(\RuntimeException::class);
         $this->expectExceptionMessage('Cannot create adapter for service "foo" because interface "Symfony\Component\DependencyInjection\Tests\Argument\NonFunctionalInterface" doesn\'t have exactly one method.');
 
-        LazyClosure::getCode('foo', [new \stdClass(), 'bar'], new Definition(NonFunctionalInterface::class), new ContainerBuilder(), 'foo');
+        LazyClosure::getCode('foo', [new \stdClass(), 'bar'], NonFunctionalInterface::class, new ContainerBuilder(), 'foo');
     }
 
     public function testThrowsOnUnknownMethodInInterface()
     {
         $this->expectException(\RuntimeException::class);
         $this->expectExceptionMessage('Cannot create lazy closure for service "bar" because its corresponding callable is invalid.');
 
-        LazyClosure::getCode('bar', [new Definition(FunctionalInterface::class), 'bar'], new Definition(\Closure::class), new ContainerBuilder(), 'bar');
+        LazyClosure::getCode('bar', [new Definition(FunctionalInterface::class), 'bar'], \Closure::class, new ContainerBuilder(), 'bar');
     }
 }
 

src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php

@@ -49,6 +49,7 @@
 use Symfony\Component\DependencyInjection\ServiceLocator;
 use Symfony\Component\DependencyInjection\Tests\Compiler\Foo;
 use Symfony\Component\DependencyInjection\Tests\Compiler\FooAnnotation;
+use Symfony\Component\DependencyInjection\Tests\Compiler\MyCallable;
 use Symfony\Component\DependencyInjection\Tests\Compiler\SingleMethodInterface;
 use Symfony\Component\DependencyInjection\Tests\Compiler\Wither;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\CaseSensitiveClass;
@@ -522,6 +523,19 @@ public function testClosureProxy()
         $this->assertInstanceOf(Foo::class, $container->get('closure_proxy')->theMethod());
     }
 
+    public function testClosureProxyWithStaticMethod()
+    {
+        $container = new ContainerBuilder();
+        $container->register('closure_proxy', SingleMethodInterface::class)
+            ->setPublic('true')
+            ->setFactory(['Closure', 'fromCallable'])
+            ->setArguments([[MyCallable::class, 'theMethodImpl']]);
+        $container->compile();
+
+        $this->assertInstanceOf(SingleMethodInterface::class, $container->get('closure_proxy'));
+        $this->assertSame(124, $container->get('closure_proxy')->theMethod());
+    }
+
     public function testCreateServiceClass()
     {
         $builder = new ContainerBuilder();

src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/autowiring_classes.php

@@ -582,4 +582,9 @@ class MyCallable
     public function __invoke(): void
     {
     }
+
+    public static function theMethodImpl(): int
+    {
+        return 124;
+    }
 }