rust

use std::any::Any;

pub trait CommandHandler {
    fn name(&self) -> &str;

    fn handle(&self, input: &dyn Any) -> Box<dyn Any>;

fn divide(a: i32, b: i32) -> i32 {
    if b == 0 {
        panic!("division by zero");
    }
    a / b
}

use std::collections::HashMap;
use std::sync::{Arc, Mutex, PoisonError};

#[derive(Default)]
struct Metrics {
    per_endpoint: HashMap<String, u64>,

use nom::{
    bytes::complete::tag,
    character::complete::digit1,
    IResult,
};

use chrono::NaiveDate;
use rust_decimal::Decimal;
use serde::{Deserialize, Deserializer};

#[derive(Debug, Clone, Deserialize)]
pub struct Transaction {

use sqlx::PgPool;

#[derive(sqlx::FromRow)]
struct User {
    id: i32,
    name: String,

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct Interval {
    pub start: i64,
    pub end: i64,
}

#[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")]