Rust Programming By Example

Creating tetriminos

We wrote the type that will be used in our game, but we didn't write its initialization/creation yet. This is where Rust traits will be useful.

Let's start by writing a generator trait that will be implemented on all tetriminos:

trait TetriminoGenerator {
    fn new() -> Tetrimino;
}

And that's it. This trait just provides a function that creates a new Tetrimino instance. It maybe doesn't like this very much, but thanks to this trait, we'll be able to easily create all our tetriminos.

Time to write our first tetrimino:

struct TetriminoI;

No need to look for more code, this is what a tetrimino really looks like. It's an empty structure. The interesting part comes just after:

impl TetriminoGenerator for TetriminoI {
    fn new() ...