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

You can use this:

• std::underlying_type class template to know the underlying type of enum.

The doc says,

Defines a member typedef type of type that is the underlying type for the enumeration T.

So you should be able to do this:

#include  //include this

FooEnum myEnum;
auto pointer = static_cast::type*>(&myEnum);