IBackendObject cast function

Author: Erfan-Ahmadi

include/nbl/video/decl/IBackendObject.h

@@ -23,6 +23,24 @@ class IBackendObject
         bool isCompatibleDevicewise(const IBackendObject* other) const;
 
         bool wasCreatedBy(const ILogicalDevice* device) const;
+        
+        template<typename derived_t_ptr, typename base_t_ptr>
+        static inline derived_t_ptr cast(base_t_ptr base, const ILogicalDevice* device)
+        {
+            using base_t = std::remove_pointer_t<base_t_ptr>;
+            using derived_t = std::remove_pointer_t<derived_t_ptr>;
+            static_assert(std::is_base_of_v<IBackendObject, base_t>,"base_t should be derived from IBackendObject");
+            static_assert(std::is_base_of_v<base_t,derived_t>,"derived_t should be derived from base_t");
+            if (!base->wasCreatedBy(device))
+                return nullptr;
+            return static_cast<derived_t_ptr>(base);
+        }
+        
+        template<typename derived_t_ptr, typename base_t_ptr, typename other_t_ptr>
+        static inline derived_t_ptr cast(base_t_ptr base, const other_t_ptr& compatibleWith)
+        {
+          return cast<derived_t_ptr,base_t_ptr>(base,compatibleWith->getOriginDevice());
+        }
 
         const ILogicalDevice* getOriginDevice() const;