add generic for method parameters

src/Decorator.php

@@ -31,6 +31,20 @@ public function __call($func, $args)
             throw new DecoratorError('Only public methods can be decorated!');
         }
 
+        $params = $method->getParameters();
+
+        foreach ($params as $paramIndex => $param) {
+            $paramAttrs = $param->getAttributes();
+
+            foreach ($paramAttrs as $paramAttr) {
+                $paramAttrInst = $paramAttr->newInstance();
+
+                if ($paramAttrInst instanceof PythonDecorator) {
+                    $paramAttrInst->bindTo($this)->wrapper($args[$paramIndex]);
+                }
+            }
+        }
+
         $attributes = $method->getAttributes();
         // }
 

tests/GenericsTest.php

@@ -118,4 +118,24 @@ public function testPrimitiveStrItSelfFail(): void
         $box = new Box();
         set_decorator_prop($box, 'str', 1);
     }
+
+    public function testMethodParamAttributes(): void
+    {
+        $this->expectNotToPerformAssertions();
+
+        $box = new Box();
+        $box(Pen::class);
+
+        call_decorator_func_array([$box, 'addItem'], [new Pen]);
+    }
+
+    public function testMethodParamAttributesFail(): void
+    {
+        $this->expectException(GenericError::class);
+
+        $box = new Box();
+        $box(Pen::class);
+
+        call_decorator_func_array([$box, 'addItem'], [new Pencil]);
+    }
 }

tests/examples/Box.php

@@ -24,4 +24,12 @@ class Box
 
     #[Length(4)]
     public $size;
+
+    #[ArrayOf(T::class)]
+    public $items;
+
+    public function addItem(#[T] $item)
+    {
+        $this->items[] = $item;
+    }
 }