Code shared from the Rust Playground

playground.rs

use futures::future::ready;
use std::future::Future;

async fn future_test() -> String {
    "test".to_string()
}

fn future_test2() -> impl Future<Output=String> {
    ready("test2".to_string())
}

#[tokio::main]
async fn main() {

    println!("{}", future_test().await);
    println!("{}", future_test2().await);
    
}