Handle typehint value 'self'

Author: Martin Rademacher

src/DocBlock/StandardTagFactory.php

@@ -36,6 +36,7 @@
 use phpDocumentor\Reflection\FqsenResolver;
 use phpDocumentor\Reflection\Types\Context as TypeContext;
 use ReflectionMethod;
+use ReflectionNamedType;
 use ReflectionParameter;
 use Webmozart\Assert\Assert;
 use function array_merge;
@@ -256,8 +257,11 @@ private function getArgumentsForParametersFromWiring(array $parameters, array $l
         foreach ($parameters as $parameter) {
             $type     = $parameter->getType();
             $typeHint = null;
-            if ($type instanceof \ReflectionNamedType) {
+            if ($type !== null && $type instanceof ReflectionNamedType) {
                 $typeHint = $type->getName();
+                if ($typeHint === 'self') {
+                    $typeHint = $parameter->getDeclaringClass()->getName();
+                }
             }
 
             if (isset($locator[$typeHint])) {