Defining Structs

Use struct to define a custom data type.

struct User {
    name: string
    age: int
}

Create an instance by calling the struct.

let user = User()

Assign fields after creation.

user.name = "Martin"
user.age = 19

Read fields with dot access.

println(user.name)
println(user.age)

Field Types

Struct fields have names and types.

struct Project {
    name: string
    stars: int
    tags: []string
    meta: dict[string, any]
}

Default Values

When a new instance is created, Nubo initializes all declared fields with default values for their types.

struct Counter {
    value: int
    label: string
}

let counter = Counter()

println(counter.value)
println(counter.label)

You can then assign actual values.

counter.value = 10
counter.label = "views"

Struct Type

The struct itself is a type definition.

struct User {
    name: string
}

Instances have that struct type.

let user = User()

println(type(user))

Struct Definitions vs Instances

A struct definition describes the shape.

struct User {
    name: string
}

An instance stores values.

let user = User()
user.name = "Martin"

Empty Structs

Structs can be empty.

struct Marker {}

Create an instance:

let marker = Marker()