These are chat archives for esp8266/Arduino
Actually, I'd hazard a guess that K & R doesn't touch on any C++ whatsoever. You'll be wanting Stroustrup instead. Don't worry about @devyte,
virtual is not a dirty word. :)
That said, AsyncTCP is not a child of WiFiClient (or any other class) and has a completely different API because it is callback based. So, while not impossible, it looks like a massive undertaking on your part.