You can do: pub fn try_join<A: Future<Output = Result<AR, E>>, B: Future<Output ...

		richardwhiuk on July 26, 2021 \| parent \| context \| favorite \| on: Understanding Rust futures by going way too deep You can do: `pub fn try_join<A: Future<Output = Result<AR, E>>, B: Future<Output = Result<BR, E>>, AR, BR, E>(a: A, b: B) -> impl Future<Output = Result<(AR, BR), E>> {`

Rust truly is a better C++.