How to know underlying type of class enum?

Question

I have a variable declared as:

enum class FooEnum: uint64_t {}

and I would like to cast to its base-type, but I don\'t want to hardcode the

Answer 1

Your guessed syntax is amazingly close. You're looking for std::underlying_type in :

#include 
#include 

enum class FooEnum: std::uint64_t {};

int main()
{
    FooEnum myEnum;
    uint64_t* intPointer = (std::underlying_type::type*)&myEnum;
}