MatejLach

fn main() {
  let b = box 15i; // `b` is the single owner of this `Box<int>`
  let c = &b; // I can have a reference to `b`
  println!("{}", c); // Unlike C++, Rust doesn't require dereferencing here
}

MatejLach

// You can only have a single owner to a particular memory space.
fn main() {
    let x = box 5i; // create an owned pointer "x" to the value 5i using the "box" keyword
    let y = x; // "y" now owns 5i
    println!("{}", x); // ERROR: "x" is no longer the owner 5i's memory space
}

MatejLach

fn main() {
    let x = box 5i; // Creates a box
    let y = x; // Transfers ownership to "y"
    let x = &y; // "x" now references what "y" owns
    println!("{}", x); // This will compile successfully
}

MatejLach

fn main() {
  // Example of a &str to a String conversion
  use std::str;
  let str_slice = "Here is a \"&'static str\"";
  let str_repl = str::replace(str_slice, "is", "was"); // String replacement
  println!("{}, now it's a \"String\".", str_repl.to_string()); // String conversion
  // To go from a String to a &str, use the as_slice() method.
}

MatejLach

static Pi: f64 = 3.14;

fn display_pi() {
  println!("{}", Pi);
}

fn main() {
  display_pi()
}

MatejLach

use std::io;

fn main() {
    println!("Type something:");

    let input = io::stdin()
                .read_line() // read user input
                .ok().expect("unable to read input!"); // Display this in case of a problem reading user input
     
     // convert to &str and get rid of the newline

MatejLach

use std::io;

fn add(x: int, y: int) -> int { // takes two integers and returns an integer
    x + y
}

fn main() {
    println!("Simple Addition Calculator, written in Rust!");

    println!("Enter 1st number: ");

MatejLach

fn main() {
    let date = ("Today", 4i, 8i, 2014i); // simple tuple
    println!("{}", date);
    
    let (wd, d, m, y) = ("Today", 4i, 8i, 2014i); // destructuring let
    println!("{} is {}/{}/{}", wd, d, m, y); // accessing individual variables from the tuple
}

MatejLach

fn main() {
    struct Date {
        m: int,
        y: int
    }

    let today = Date {m: 8i, y: 2014i};
    println!("\"August\" is the {}th month in {} (and every other year)", today.m, today.y); // access individual fields
}

MatejLach

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