Structs and Enums

When a single value isn’t enough, model your data with structs and enums. Both can be exported and used from your business logic like any other type.

Define a named structure with the struct keyword:

export struct Player  {
    name: string,
    score: int,
}

export component Example {
    in-out property<Player> player: { name: "Foo", score: 100 };
}

slint

Fields can declare default values, and for one-off shapes you can use an anonymous struct type like {name: string, score: int} directly.

Define an enumeration with the enum keyword:

export enum CardSuit { clubs, diamonds, hearts, spade }

export component Example {
    in-out property<CardSuit> card: spade;
    out property<bool> is-clubs: card == CardSuit.clubs;
}

slint

Refer to a value as CardSuit.spade, or drop the enum name wherever the type is already known — like in the binding above.

For field defaults, name omission, and default values, see the Structs and Enums chapter of the language reference.