use futures::executor::ThreadPool;
use std::error::Error;

async fn foo() -> u8 {
   println!("hi");
        55
}

async fn bar() {
        let mut i = 0;
        let mut k = vec!();
        while i < 5 {
                i = i + 1;
                k.push(foo());
        }
        for thing in k {
                thing.await;

        }
}

fn main() -> Result<(), Box<dyn Error>> {
    let mut pool = ThreadPool::new()?;
    pool.run(bar());
    println!("Hello, world!");
        Ok(())
}