In C++20 given

enum A { e1=1, e2 } ;
enum class B { e1=1, e2 } ;

Which of the following invokes undefined behavior

A.
A a = (A)(3);
B.
A a = (A)(4);
C.
B b = (B)(std::numeric_limits<std::underlying_type<B>::type >::max());#Cplusplus #Cpp20 #CppPolls #Programming

— Shafik Yaghmour (@shafikyaghmour) August 29, 2018