Marcus Chen

struct UserId(u32);

impl From<u32> for UserId {
    fn from(id: u32) -> Self {
        UserId(id)
    }

use std::fmt;

struct Point {
    x: i32,
    y: i32,
}

[package]
name = "my-app"
version = "0.1.0"

[dependencies]
tokio = "1"

use once_cell::sync::Lazy;
use regex::Regex;

static EMAIL_REGEX: Lazy<Regex> = Lazy::new(|| {
    Regex::new(r"^[^ @]+@[^ @]+.[^ @]+$").unwrap()
});

use tracing::{info, instrument};

#[instrument]
fn process_request(user_id: u64) {
    info!(user_id, "Processing request");
    // Work happens here

use tokio::time::{sleep, Duration};

#[tokio::main]
async fn main() {
    let fast = sleep(Duration::from_millis(50));
    let slow = sleep(Duration::from_millis(200));

use std::pin::Pin;
use std::future::Future;

async fn example() {
    println!("Example future");
}

macro_rules! create_function {
    ($func_name:ident) => {
        fn $func_name() {
            println!("Called {}", stringify!($func_name));
        }
    };

struct Locked;
struct Unlocked;

struct Door<State> {
    _state: std::marker::PhantomData<State>,
}

pub struct Server {
    host: String,
    port: u16,
    workers: usize,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
struct UserId(u32);

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
struct PostId(u32);

use rayon::prelude::*;

fn main() {
    let numbers: Vec<_> = (0..1000).collect();

    let sum: i32 = numbers