[−][src]Function futures::future::err
pub fn err<T, E>(err: E) -> Ready<Result<T, E>>
Create a future that is immediately ready with an error value.
Examples
#![feature(async_await, await_macro, futures_api)] use futures::future; let a = future::err::<i32, i32>(1); assert_eq!(await!(a), Err(1));