What is the “^” symbol in C++?

Has a new symbol joined the C++ language specification while I was sleeping under a rock?

I just encountered the following question:

Restrict Text Box to only accept 10 digit number

Which suggests that the '^' symbol is somehow part of C++ (not in the legacy meaning of a bitwise-XOR)

Is this so?

If so, what does it mean? (I tried to google the question but Google didn't come up with satisfactory answers)