fix pr #8

src/ReflectionParameterTyped.php

@@ -34,17 +34,15 @@ public function __construct(
         private ReflectionParameter $reflection
     ) {
         $this->type = $this->getType();
-        $parameter = ($this->type instanceof ReflectionUnionType) ?
-            toUnionParameter($this->type->getTypes()) :
-            toParameter($this->type?->getName() ?? 'mixed');
+        $parameter = $this->getParameter();
 
         try {
             $attribute = reflectedParameterAttribute($reflection);
         } catch (Throwable) {
             // do nothing
         }
         if (isset($attribute, $this->type)) {
-            $typeHint = $this->type->getName();
+            $typeHint = $this->getTypeHint($this->type);
             $attrHint = $attribute->parameter()->type()->typeHinting();
             if ($typeHint !== $attrHint) {
                 throw new TypeError(
@@ -76,6 +74,25 @@ public function parameter(): ParameterInterface
         return $this->parameter;
     }
 
+    private function getParameter(): ParameterInterface
+    {
+        if ($this->type instanceof ReflectionUnionType) {
+            $types = [];
+            foreach ($this->type->getTypes() as $type) {
+                if ($type instanceof ReflectionIntersectionType) {
+                    continue;
+                }
+                $types[] = $type->getName();
+            }
+
+            return toUnionParameter(...$types);
+        } elseif ($this->type !== null) {
+            return toParameter($this->getTypeHint($this->type));
+        }
+
+        return toParameter('mixed');
+    }
+
     private function getType(): ReflectionNamedType|ReflectionUnionType|null
     {
         $reflection = $this->reflection->getType();
@@ -97,6 +114,23 @@ private function getType(): ReflectionNamedType|ReflectionUnionType|null
         );
     }
 
+    private function getTypeHint(object $reflection): string
+    {
+        if (method_exists($reflection, 'getName')) {
+            return $reflection->getName();
+        }
+        if ($reflection instanceof ReflectionUnionType) {
+            $types = [];
+            foreach ($reflection->getTypes() as $type) {
+                $types[] = $this->getTypeHint($type);
+            }
+
+            return implode('|', $types);
+        }
+
+        return 'mixed';
+    }
+
     /**
      * @infection-ignore-all
      */

src/functions.php

@@ -37,7 +37,6 @@
 use ReflectionAttribute;
 use ReflectionFunction;
 use ReflectionMethod;
-use ReflectionNamedType;
 use ReflectionParameter;
 use Throwable;
 use function Chevere\Message\message;
@@ -137,15 +136,12 @@ function assertNamedArgument(
     }
 }
 
-function toUnionParameter(array $types): UnionParameterInterface
+function toUnionParameter(string ...$types): UnionParameterInterface
 {
     $parameters = [];
-
-    /** @var ReflectionNamedType $type */
     foreach ($types as $type) {
-        $parameters[] = toParameter($type->getName());
+        $parameters[] = toParameter($type);
     }
-
     $parameters = parameters(...$parameters);
 
     return new UnionParameter($parameters);