Error code E0708
async
non-move
closures with parameters are currently not supported.
Erroneous code example:
#![feature(async_closure)] fn main() { let add_one = async |num: u8| { // error! num + 1 }; }
async
with non-move is currently not supported with the current
version, you can use successfully by using move:
#![feature(async_closure)] fn main() { let add_one = async move |num: u8| { // ok! num + 1 }; }