bool operator ++ and --

Question

Today while writing some Visual C++ code I have come across something which has surprised me. It seems C++ supports ++ (increment) for bool, but not -- (decrement). It this

Answer 1

• With the old standards (C++98) it is not an error.
• With the new standards incrementing a boolean is deprecated. (C++11)
• You can use incrementation on a boolean until C++17.