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Re: C++ templated class referencing each other [message #55100 is a reply to message #55096]

Sun, 11 October 2020 04:36

Lance
Messages: 656
Registered: March 2007

Contributor

Notice that I essentially put everything in the same header file (equivalently).

Also, if your can guarantee that ComponentManager Will be the first member variable (because why-not and you should put a static_assert to avoid accidently add some other member variable in front it subsequently), you can probably save the

Object& obj;

member variable in the ComponentManager class. Simply define it like:

class Object;

class ComponentManager{
    public:
     ComponentManager(){}
     
     template <class T> T& CreateComponent(bool active, int position);

     /*
        Many templated function that force me to write declaration in this .h file
     */
    private:
      Object& object(){
          return *reinterpret_cast<Object*>(this);
      }

};

And change other part of your code accordingly.

PS: If your Object class is virtual, some compiler might put vtable at this. In this case, above hack will be problematic. I will consider to let Object to privately inherit from ComponentManager.

[Updated on: Sun, 11 October 2020 04:45]

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