Struct CatchUnwind 

pub struct CatchUnwind<F> { /* private fields */ }

A future adapter that catches a panic from the inner future’s poll and resolves to Err(payload) instead of unwinding into the executor.

This is how run_async keeps the “callback fires exactly once” promise even when the producer’s future panics: it awaits CatchUnwind::new(user_future) and reports an Err through the completion callback with the reserved panic code.

Implementations

impl<F: Future> CatchUnwind<F>

pub fn new(fut: F) -> Self

Wrap fut.

Trait Implementations

impl<F: Future> Future for CatchUnwind<F>

type Output = Result<<F as Future>::Output, Box<dyn Any + Send>>

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.