Enums

Enums represent a set of named constants. They can have an underlying type (default is int) and even support inheritance.

Basic Enums

enum Thing {

    Fruit,

    Veg

}



var t = Thing.Fruit

if (t == Thing.Fruit) {

    printf("It's a fruit!\n")

}

Underlying Types

Specify a different underlying type for memory efficiency:

enum Color : u8 {

    Red,    // 0

    Green,  // 1

    Blue    // 2

}



enum LargeEnum : ushort {

    Value1,

    Value2,

    Value3

}

Custom Values

Set explicit values for enum members:

enum StartingValue {

    First = 50,   // 50

    Second,       // 51

    Third,        // 52

    Fourth = 10,  // 10

    Fifth,        // 11

    Sixth         // 12

}

Negative Values

Enums can have negative values:

enum SignedValues {

    NegFirst = -10,  // -10

    NegSecond,       // -9

    NegThird         // -8

}

Member Aliasing

Reference other enum members:

enum MultiNum {

    First,

    Second,

    AnotherFirst = First,   // Same value as First

    AnotherSecond = Second  // Same value as Second

}

Enum Inheritance

Extend an existing enum with new values:

enum Thing {

    Fruit,  // 0

    Veg     // 1

}



// Extends Thing, continues numbering

enum Anything : Thing {

    Space,     // 2

    Universe,  // 3

    Garbage    // 4

}



// Anything has all values from Thing plus its own

Anything.Fruit     // 0

Anything.Universe  // 3

Enums in Namespaces

namespace colors {

    enum favorite {

        red,

        green,

        blue

    }

}



var c = colors::favorite.red