[foota]

Seems like this could be handled with a wrapper type with runtime checks during debug?

Like make any pointer to the per frame allocation be a TempPointer or something and then assert they're all gone with a static count variable of them? Then you just have to be cautious whenever you pass a reference to one or convert to a raw pointer.

I don't think this would be too awful for performance in debug builds.

[monocasa]

Yeah, or a generation system where the pointer holds a frame count too that's asserted on deref.

The point though is that it's a step back still from shared_ptr/unique_ptr by becoming a runtime check instead of compile time.