How to store async functions in a vector?

[alice]

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How to handle a vector of async function pointers

Hello all, I'm new to Rust and coming from typescript/haskell. I'm attempting to implement something along the lines of: use std::future::Future; async fn add_one(i: i32) -> Option<i32> { Some(i + 1) } async fn to_none(i: i32) -> Option<i32> { None } #[tokio::main] async fn main() { let mut futures: Vec<fn(i32) -> dyn Future<Output = Option<i32>>> = vec![]; futures.push(add_one); // Error futures.push(to_none); // Error // mismatched types …