The C++ compiler is required to perform this silent conversion according to the standard: https://en.cppreference.com/w/cpp/language/implicit_conversion#Integra

The C++ compiler is required to perform this silent conversion according to the standard: https://en.cppreference.com/w/cpp/language/implicit_conversion#Integral_promotion https://en.cppreference.com/w/cpp/language/implicit_conversi...