Trait PollExt

pub trait PollExt<T> {
    // Required methods
    fn unwrap(self) -> T;
    fn expect(self, msg: &str) -> T;
    fn expect_pending(&self, msg: &str);
    fn ready_or<E>(self, error: E) -> Result<T, E>;
    fn ready_or_else<E, F>(self, error: F) -> Result<T, E>
       where F: FnOnce() -> E;
}

An extension trait for core::task::Poll that provides convenient adapters for extracting output values.

Required Methods

fn unwrap(self) -> T

Returns the value contained in a Poll::Ready value or panics.

fn expect(self, msg: &str) -> T

Returns the value contained in a Poll::Ready value or panics with a custom message.

fn expect_pending(&self, msg: &str)

Expect a Poll to be Pending, or panics with a custom message.

fn ready_or<E>(self, error: E) -> Result<T, E>

Turns a Poll into a Result, mapping Poll::Ready(value) to Ok(value) and Poll::Pending to Err(error)

fn ready_or_else<E, F>(self, error: F) -> Result<T, E>

where F: FnOnce() -> E,

Turns a Poll into a Result, mapping Poll::Ready(value) to Ok(value) and Poll::Pending to Err(error())

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<T> PollExt<T> for Poll<T>

fn unwrap(self) -> T

fn expect(self, msg: &str) -> T

fn expect_pending(&self, msg: &str)

fn ready_or<E>(self, error: E) -> Result<T, E>

fn ready_or_else<E, F>(self, error: F) -> Result<T, E>

where F: FnOnce() -> E,

Implementors