PHP/native/UnitEnum

UnitEnum pseudointerface manual page: The UnitEnum interface

Note that this interface cannot actually be implemented as a standard class; it can only be (pseudo)implemented by declaring an enum.

If an enum is "backed" (declared as having a scalar value for each choice), it will implement this interface but also the BackedEnum interface.)

Definition

interface UnitEnum {
  static function cases(): array

  string $name; // pseudocode
}

The member-variable is labelled "pseudocode" because a normal interface can't declare member-variables.