Is “enum class” a class type in C++?

enum class is not a class definition – the combination of keywords is used to define a scoped enumeration, which is a completely separate entity from a class.

std::is_class correctly returns false here. If you use std::is_enum, it will return true.

From the Standard:

The enumeration type declared with an enum-key of only enum is an unscoped enumeration, and its enumerators are unscoped enumerators. The enum-keys enum class and enum struct are semantically equivalent; an enumeration type declared with one of these is a scoped enumeration, and its enumerators are scoped enumerators.

There is no mention of an enum class being a “class type” anywhere in the Standard.