# Struct futures_task::FutureObj [−] [src]

    pub struct FutureObj<'a, T>(_);

A custom trait object for polling futures, roughly akin to `Box<dyn Future<Output = T> + Send + 'a>`.

This custom trait object was introduced as currently it is not possible to take `dyn Trait` by value and `Box<dyn Trait>` is not available in no_std contexts.

You should generally not need to use this type outside of `no_std` or when implementing `Spawn`, consider using `BoxFuture` instead.

## Implementations

### `impl<'a, T> FutureObj<'a, T>` [src]

#### `pub fn new<F: UnsafeFutureObj<'a, T> + Send>(f: F) -> Self` [src]

Create a `FutureObj` from a custom trait object representation.

## Trait Implementations

### `impl<T> Debug for FutureObj<'_, T>` [src]

#### `fn fmt(&self, f: &mut Formatter<'_>) -> Result` [src]

Formats the value using the given formatter. Read more

### `impl<'a, T> From<FutureObj<'a, T>> for LocalFutureObj<'a, T>` [src]

#### `fn from(f: FutureObj<'a, T>) -> Self` [src]

Performs the conversion.

### `impl<T> Future for FutureObj<'_, T>` [src]

#### `type Output = T`

The type of value produced on completion.

#### `fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<T>` [src]

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

### `impl<T> Send for FutureObj<'_, T>` [src]

### `impl<T> Unpin for FutureObj<'_, T>` [src]

## Auto Trait Implementations

### `impl<'a, T> !Sync for FutureObj<'a, T>`

## Blanket Implementations

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `pub fn type_id(&self) -> TypeId` [src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow(&self) -> &T` [src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow_mut(&mut self) -> &mut T` [src]

Mutably borrows from an owned value. Read more

### `impl<T> From<T> for T` [src]

#### `pub fn from(t: T) -> T` [src]

Performs the conversion.

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `pub fn into(self) -> U` [src]

Performs the conversion.

### `impl<F> IntoFuture for F where
F: Future,` [src]

#### `type Output = <F as Future>::Output`

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

The output that the future will produce on completion.

#### `type Future = F`

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

Which kind of future are we turning this into?

#### `pub fn into_future(self) -> <F as IntoFuture>::Future` [src]

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

Creates a future from a value.

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>` [src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

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

The type returned in the event of a conversion error.

#### `pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>` [src]

Performs the conversion.