Struct std::future::PollFn[−][src]

pub struct PollFn<F> { /* fields omitted */ }

🔬 This is a nightly-only experimental API. (future_poll_fn #72302)

Expand description

Future，它包装返回 Poll 的函数。

该 struct 由 poll_fn() 创建。有关更多信息，请参见其文档。

Trait Implementations

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impl<F> Debug for PollFn<F>

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pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

使用给定的格式化程序格式化该值。 Read more

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impl<T, F> Future for PollFn<F> where
F: FnMut(&mut Context<'_>) -> Poll<T>,

type Output = T

完成时产生的值类型。

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pub fn poll(self: Pin<&mut PollFn<F>>, cx: &mut Context<'_>) -> Poll<T>

尝试将 future 解析为最终值，如果该值尚不可用，请注册当前任务以进行唤醒。 Read more

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impl<F> Unpin for PollFn<F>

Auto Trait Implementations

impl<F> RefUnwindSafe for PollFn<F> where
F: RefUnwindSafe,

impl<F> Send for PollFn<F> where
F: Send,

impl<F> Sync for PollFn<F> where
F: Sync,

impl<F> UnwindSafe for PollFn<F> where
F: UnwindSafe,

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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pub fn type_id(&self) -> TypeId

获取 self 的 TypeId。 Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

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pub fn borrow(&self) -> &T

从拥有的值中一成不变地借用。 Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

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pub fn borrow_mut(&mut self) -> &mut T

从拥有的值中借用。 Read more

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impl<T> From<T> for T

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pub fn from(t: T) -> T

执行转换。

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impl<T, U> Into for T where
U: From<T>,

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pub fn into(self) -> U

执行转换。

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impl<F> IntoFuture for F where
F: Future,

type Output = <F as Future>::Output

🔬 This is a nightly-only experimental API. (into_future #67644)

future 完成时将产生的输出。

type Future = F

🔬 This is a nightly-only experimental API. (into_future #67644)

我们要把它变成哪种 future?

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pub fn into_future(self) -> <F as IntoFuture>::Future

🔬 This is a nightly-only experimental API. (into_future #67644)

根据一个值创建一个 future。

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

发生转换错误时返回的类型。

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pub fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

执行转换。

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

发生转换错误时返回的类型。

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pub fn try_into(self) -> Result<U, >::Error>

执行转换。

Struct std::future::PollFn[−][src]

Trait Implementations

impl<F> Debug for PollFn<F>

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

impl<T, F> Future for PollFn<F> where
F: FnMut(&mut Context<'_>) -> Poll<T>,

type Output = T

pub fn poll(self: Pin<&mut PollFn<F>>, cx: &mut Context<'_>) -> Poll<T>

impl<F> Unpin for PollFn<F>

Auto Trait Implementations

impl<F> RefUnwindSafe for PollFn<F> where
F: RefUnwindSafe,

impl<F> Send for PollFn<F> where
F: Send,

impl<F> Sync for PollFn<F> where
F: Sync,

impl<F> UnwindSafe for PollFn<F> where
F: UnwindSafe,

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

pub fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where
T: ?Sized,

pub fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

pub fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

pub fn from(t: T) -> T

impl<T, U> Into<U> for T where
U: From<T>,

pub fn into(self) -> U

impl<F> IntoFuture for F where
F: Future,

type Output = <F as Future>::Output

type Future = F

pub fn into_future(self) -> <F as IntoFuture>::Future

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Struct std::future::PollFn[−][src]

Trait Implementations

impl<F> Debug for PollFn<F>

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

impl<T, F> Future for PollFn<F> where F: FnMut(&mut Context<'_>) -> Poll<T>,

type Output = T

pub fn poll(self: Pin<&mut PollFn<F>>, cx: &mut Context<'_>) -> Poll<T>

impl<F> Unpin for PollFn<F>

Auto Trait Implementations

impl<F> RefUnwindSafe for PollFn<F> where F: RefUnwindSafe,

impl<F> Send for PollFn<F> where F: Send,

impl<F> Sync for PollFn<F> where F: Sync,

impl<F> UnwindSafe for PollFn<F> where F: UnwindSafe,

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

pub fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

pub fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

pub fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

pub fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

pub fn into(self) -> U

impl<F> IntoFuture for F where F: Future,

type Output = <F as Future>::Output

type Future = F

pub fn into_future(self) -> <F as IntoFuture>::Future

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T, F> Future for PollFn<F> where
F: FnMut(&mut Context<'_>) -> Poll<T>,

impl<F> RefUnwindSafe for PollFn<F> where
F: RefUnwindSafe,

impl<F> Send for PollFn<F> where
F: Send,

impl<F> Sync for PollFn<F> where
F: Sync,

impl<F> UnwindSafe for PollFn<F> where
F: UnwindSafe,

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<F> IntoFuture for F where
F: Future,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,