Enumeration is a basic type in C++ that defines a collection of values, always of an integral underlying type. Their named values, that are constant, are called enumerators. Enumerations declared with keyword enum are called unscoped enumerations and enumerations declared with enum class or enum struct are called scoped enumerations. The latter ones were introduced in C++11 and are intended to solve several problems of the unscoped enumerations.
- Prefer to use scoped enumerations instead of unscoped ones.
- In order to use scoped enumerations, you should declare enumerations using
enum classorenum struct:
enum class Status { Unknown, Created, Connected };
Status s = Status::Created;