Pointer.h

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#pragma once
#include <memory>
 
namespace EngineCore {
 
    // Template function to cast std::weak_ptr<Base> to std::weak_ptr<Derived>
    template <typename Derived, typename Base>
    std::weak_ptr<Derived> castWeakPtr(const std::weak_ptr<Base>& baseWeakPtr) {
        // Step 1: Lock the weak_ptr to obtain a shared_ptr<Base>
        std::shared_ptr<Base> baseSharedPtr = baseWeakPtr.lock();
 
        if (!baseSharedPtr) {
            // The original object has been destroyed or the weak_ptr is expired
            return std::weak_ptr<Derived>();
        }
 
        // Step 2: Attempt to dynamically cast the shared_ptr<Base> to shared_ptr<Derived>
        std::shared_ptr<Derived> derivedSharedPtr = std::dynamic_pointer_cast<Derived>(baseSharedPtr);
 
        if (!derivedSharedPtr) {
            // The cast failed; the object is not of type Derived
            return std::weak_ptr<Derived>();
        }
 
        // Step 3: Convert shared_ptr<Derived> back to weak_ptr<Derived>
        return std::weak_ptr<Derived>(derivedSharedPtr);
    }
}