Struct capnp::capability::Promise

#[must_use = "futures do nothing unless polled"]
pub struct Promise<T, E> { /* fields omitted */ }

A computation that might eventually resolve to a value of type T or to an error of type E. Dropping the promise cancels the computation.

Methods

impl<T, E> Promise<T, E>

fn ok(value: T) -> Promise<T, E>

fn err(error: E) -> Promise<T, E>