Enum futures::Async

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pub enum Async<T> {
    Ready(T),
    NotReady,
}

Expand description

Return type of future, indicating whether a value is ready or not.

Variants

`Ready(T)`

Represents that a value is immediately ready.

`NotReady`

Represents that a value is not ready yet, but may be so later.

Implementations

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impl<T> Async<T>

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pub fn map<F, U>(self, f: F) -> Async where
F: FnOnce(T) -> U,

Change the success value of this Async with the closure provided

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pub fn is_ready(&self) -> bool

Returns whether this is Async::Ready

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pub fn is_not_ready(&self) -> bool

Returns whether this is Async::NotReady

Trait Implementations

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impl<T: Clone> Clone for Async<T>

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fn clone(&self) -> Async<T>

Returns a copy of the value. Read more

1.0.0 · source

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl<T: Debug> Debug for Async<T>

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

Formats the value using the given formatter. Read more

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impl<T> From<T> for Async<T>

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fn from(t: T) -> Async<T>

Performs the conversion.

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impl<T: PartialEq> PartialEq<Async<T>> for Async<T>

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fn eq(&self, other: &Async<T>) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

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fn ne(&self, other: &Async<T>) -> bool

This method tests for !=.

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impl<T: Copy> Copy for Async<T>

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impl<T> StructuralPartialEq for Async<T>

Auto Trait Implementations

impl<T> RefUnwindSafe for Async<T> where
T: RefUnwindSafe,

impl<T> Send for Async<T> where
T: Send,

impl<T> Sync for Async<T> where
T: Sync,

impl<T> Unpin for Async<T> where
T: Unpin,

impl<T> UnwindSafe for Async<T> where
T: 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

Gets the TypeId of self. Read more

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

const: unstable · source

pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> From<!> for T

const: unstable · source

pub fn from(t: !) -> T

Performs the conversion.

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impl<T> From<T> for T

const: unstable · source

pub fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

pub fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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pub fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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pub fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

Enum futures::Async

Variants

Ready(T)

NotReady

Implementations

impl<T> Async<T>

pub fn map<F, U>(self, f: F) -> Async<U> where F: FnOnce(T) -> U,

pub fn is_ready(&self) -> bool

pub fn is_not_ready(&self) -> bool

Trait Implementations

impl<T: Clone> Clone for Async<T>

fn clone(&self) -> Async<T>

fn clone_from(&mut self, source: &Self)

impl<T: Debug> Debug for Async<T>

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

impl<T> From<T> for Async<T>

fn from(t: T) -> Async<T>

impl<T: PartialEq> PartialEq<Async<T>> for Async<T>

fn eq(&self, other: &Async<T>) -> bool

fn ne(&self, other: &Async<T>) -> bool

impl<T: Copy> Copy for Async<T>

impl<T> StructuralPartialEq for Async<T>

Auto Trait Implementations

impl<T> RefUnwindSafe for Async<T> where T: RefUnwindSafe,

impl<T> Send for Async<T> where T: Send,

impl<T> Sync for Async<T> where T: Sync,

impl<T> Unpin for Async<T> where T: Unpin,

impl<T> UnwindSafe for Async<T> where T: 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<!> for T

pub fn from(t: !) -> 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<T> ToOwned for T where T: Clone,

type Owned = T

pub fn to_owned(&self) -> T

pub fn clone_into(&self, target: &mut T)

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>

`Ready(T)`

`NotReady`

pub fn map<F, U>(self, f: F) -> Async<U> where
F: FnOnce(T) -> U,

impl<T> RefUnwindSafe for Async<T> where
T: RefUnwindSafe,

impl<T> Send for Async<T> where
T: Send,

impl<T> Sync for Async<T> where
T: Sync,

impl<T> Unpin for Async<T> where
T: Unpin,

impl<T> UnwindSafe for Async<T> where
T: 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<T> ToOwned for T where
T: Clone,

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

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