structs.md

Structs

The following code shows basic use of a struct.

Point: struct {
    x: float
    y: float
}

{% hint style="info" %} Comma separation is optional in struct initialization and definition. {% endhint %}

Point is thus defined as a data structure containing two float fields xand y.

You can define instances of Pointlike so:

point0 := new Point {
    x: 100
    y: 200
}

point1: Point = new Point {
    x: 1
    y: 2
}

Struct fields are always mutable. You can access fields of a struct like this:

point := new Point {
    x: 100
    y: 100
}

point x = 20
point y = point x

{% hint style="info" %} Wu does not use .for field access, because doing so would be gross. {% endhint %}

We can also implement methods on our structs. This will feel very familiar for people with Rust experience.

Vector: struct {
    x: float,
    y: float
}

implement Vector {
    new: fun(x, y) -> Self {
        Vector {
            x: x,
            y: y
        }
    }

    length: fun(self) -> float {
        (self x^2 + self y^2)^0.5
    }

    normalize: fun(self) {
        len := self length()
        
        self x /= len
        self y /= len
    }
}

a := Vector new(100, 100)
a normalize()

{% hint style="info" %} Self aliases whatever struct type you're implementing on. {% endhint %}