PHP/native/UnitEnum

UnitEnum pseudointerface manual page: The UnitEnum interface

Note that this (pseudo)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 and also the BackedEnum interface which (pseudo)inherits from this one.)

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.

cases()

This method returns an array containing one element for each case in the enum:

• <array index> (int) => <enum case-object> (BackedEnum)

This list can then be used to build other arrays indexing the enum class's names and/or any other information known to each case.

See Also

• match()