Used to teach C++ - doing it this way is absolutely _not_ how to do or use the PIMPL idiom [0]. Declaring a private and opaque forward decl is very different t

Used to teach C++ - doing it this way is absolutely _not_ how to do or use the PIMPL idiom [0]. Declaring a private and opaque forward decl is very different to VOID* all the things. [0] https://en.cppreference.com/w/cpp/language/pimpl https://en.cppreference.com/w/cpp/language/pimpl