小编Ale*_*aev的帖子

I have tried Tokio tasks, but there are no working examples to execute multiple tasks at once. What is wrong with this code?

fn main() {
    block_on(speak());
}

async fn speak() {
    let hold = vec![say(), greet()];
    let results = join_all(hold).await;
}

async fn say() {
    println!("hello");
}

async fn greet() {
    println!("world");
}

here is the compiler output

error[E0308]: mismatched types
  --> sync\src\main.rs:14:27
   |
14 |     let hold = vec![say(),greet()];
   |                           ^^^^^^^ expected opaque type, found a different opaque …