rust

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

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

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

#[tokio::main]
async fn main() {
    let handle = tokio::spawn(async {
        sleep(Duration::from_millis(100)).await;

use base64::{engine::general_purpose::URL_SAFE_NO_PAD, Engine};
use serde::{Deserialize, Serialize};
use time::OffsetDateTime;
use uuid::Uuid;

#[derive(Debug, Clone, Serialize, Deserialize)]

use serde::{Deserialize, Deserializer};
use time::OffsetDateTime;

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct UserProfile {

#[cfg(target_os = "linux")]
fn platform_specific() {
    println!("Running on Linux");
}

#[cfg(target_os = "windows")]

#[derive(Debug, Clone, PartialEq)]
struct Point {
    x: i32,
    y: i32,
}

[workspace]
members = [
    "server",
    "client",
    "common",
]

use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub struct CancelReason {
    pub reason: String,
    pub feedback: Option<String>,

use serde::Deserialize;

#[derive(Debug, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct Config {
    pub server: ServerConfig,

enum Status {
    Ok,
    Error(String),
    Pending,
}

# Install
cargo install cargo-expand

# Expand entire crate
cargo expand

use std::collections::HashMap;

fn main() {
    let mut scores = HashMap::new();
    scores.insert("Alice", 10);
    scores.insert("Bob", 20);