Right now, imo, the best way (for scoped enum) is with a macro:

#define ENUM_VALUE(x) static_caststd::underlying_type_t<decltype(x)>(x)

That's guaranteed to work everywhere and at compile time, unlike the constexpr patterns.

If it was just about typing less, I wouldn't bother at all... but it's also less error prone than typing out the static_cast because it extracts the base type of the enum class.

But, as someone else mentioned, a very viable alternative is to use unscoped enums within their own namespace.