Introduction to Rust

Antoine Wacheux

Hello world

fn main() {
    println!("Hello l'UTC");
}

Hello l'UTC

Structures

use std::num::Float;

struct Point {
    x:f64, y:f64
}

fn  main()  {
    let a = Point { x:3.0, y:4.0 };
    let dist = (a.x*a.x + a.y*a.y).sqrt();
    println!("{} {} {}", a.x, a.y, dist);
}

3 4 5

Structures and methods

use std::f64::consts::PI;
use std::num::Float;

struct Circle { x:f64, y:f64, radius:f64 }
impl Circle {
    fn area(&self) -> f64 { PI*self.radius*self.radius }
}

fn  main()  {
    let c = Circle { x:3.0, y:3.0, radius:2.0 };
    println!("{:?}", c.area());
}

12.566371

Traits

trait HasArea { fn area(&self) -> f64; }

struct Circle { x:f64, y:f64, radius:f64 }
impl HasArea for Circle {
    fn area(&self) -> f64 { PI*self.radius*self.radius }
}

struct Rect { x1:f64, y1:f64, x2:f64, y2:f64 }
impl HasArea for Rect {
    fn area(&self) -> f64 { (self.x2-self.x1).abs()*(self.y2-self.y1).abs() }
}

fn  main()  {
    let r = Rect { x1:3.0, y1:3.0, x2:10.0, y2: 7.0};
    let c = Circle { x:3.0, y:3.0, radius:2.0 };
    println!("{:?} {:?}", r.area(), c.area());
}

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Pattern matching

enum Resultat {
    Erreur(String),
    Ok(i32)
}

fn diviser(a: i32, b: i32) -> Resultat {
    if b == 0 {
        Erreur(String::from("Division par 0"))
    }
    else {
        Ok(a/b)
    }
}

fn main() {
    match diviser(4, 2) {
        Erreur(msg) => println!("{}", msg),
        Ok(result) => println!("Resultat : {}", result),
    }
}

Resultat : 2

Introduction to Rust Antoine Wacheux awacheux.utc@gmail.com @AntoineWacheux Github

Introduction to Rust

Features

Projects

Replace C++

But

Rust is...

Traditional features:

Modern features:

Hello world

Structures

Structures and methods

Traits

Pattern matching

And now ?

Conclusion

Links & My projects