Comment on page
Traits

Wu has straight up stolen trait behavior from Rust and Pony. Traits can be thought of as behavior criteria for a struct, defined as a set of methods one can expect to find on a struct.
A trait can be defined like so:
Movable: trait {
    move: fun(self, dx: float, dy: foat)
}
Thus, anything that implements Movablewill have to have a method named movethat takes the given parameters on it.
We can implement traits on a struct like this:
Vector: struct {
    x: float
    y: float
}
​
implement Vector: Movable {
    move: fun(self, dx: float, dy: float) {
        self x += dx
        self y += dy   
    }
}
Now, when we try to move a Vector using the movemethod it works perfectly:
point := new Vector {
    x: 100
    y: 100
}
​
point move(10, 5)
​
Module
Last modified 4yr ago