# [−][src]Struct alloc::pin::PinMut

    pub struct PinMut<'a, T> where
        T: 'a + 'a + ?Sized,  { /* fields omitted */ }

🔬 This is a nightly-only experimental API. (`pin` #49150)

A pinned reference.

This type is similar to a mutable reference, except that it pins its value, which prevents it from moving out of the reference, unless it implements `Unpin`.

See the `pin` module documentation for furthur explanation on pinning.

## Methods

###

`impl<'a, T> PinMut<'a, T> where T: Unpin + ?Sized,`

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####

`pub fn new(reference: &'a mut T) -> PinMut<'a, T>`

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🔬 This is a nightly-only experimental API. (`pin` #49150)

Construct a new `PinMut` around a reference to some data of a type that implements `Unpin`.

####

`pub fn get_mut(this: PinMut<'a, T>) -> &'a mut T`

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🔬 This is a nightly-only experimental API. (`pin` #49150)

Get a mutable reference to the data inside of this `PinMut`.

###

`impl<'a, T> PinMut<'a, T> where T: ?Sized,`

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####

`pub unsafe fn new_unchecked(reference: &'a mut T) -> PinMut<'a, T>`

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🔬 This is a nightly-only experimental API. (`pin` #49150)

Construct a new `PinMut` around a reference to some data of a type that may or may not implement `Unpin`.

This constructor is unsafe because we do not know what will happen with that data after the lifetime of the reference ends. If you cannot guarantee that the data will never move again, calling this constructor is invalid.

####

`pub fn reborrow(&'b mut self) -> PinMut<'b, T>`

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🔬 This is a nightly-only experimental API. (`pin` #49150)

Reborrow a `PinMut` for a shorter lifetime.

For example, `PinMut::get_mut(x.reborrow())` (unsafely) returns a short-lived mutable reference reborrowing from `x`.

####

`pub unsafe fn get_mut_unchecked(this: PinMut<'a, T>) -> &'a mut T`

[src]

🔬 This is a nightly-only experimental API. (`pin` #49150)

Get a mutable reference to the data inside of this `PinMut`.

This function is unsafe. You must guarantee that you will never move the data out of the mutable reference you receive when you call this function.

####

`pub unsafe fn map_unchecked<U, F>(this: PinMut<'a, T>, f: F) -> PinMut<'a, U> where F: FnOnce(&mut T) -> &mut U,`

[src]

🔬 This is a nightly-only experimental API. (`pin` #49150)

Construct a new pin by mapping the interior value.

For example, if you wanted to get a `PinMut` of a field of something, you could use this to get access to that field in one line of code.

This function is unsafe. You must guarantee that the data you return will not move so long as the argument value does not move (for example, because it is one of the fields of that value), and also that you do not move out of the argument you receive to the interior function.

####

`pub fn set(this: PinMut<'a, T>, value: T)`

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🔬 This is a nightly-only experimental API. (`pin` #49150)

Assign a new value to the memory behind the pinned reference.

## Trait Implementations

###

`impl<'a, T, F> UnsafeFutureObj<'a, T> for PinMut<'a, F> where F: Future<Output = T> + 'a,`

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####

`fn into_raw(self) -> *mut ()`

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🔬 This is a nightly-only experimental API. (`futures_api` #50547)

futures in libcore are unstable

Convert an owned instance into a (conceptually owned) void pointer.

####

`unsafe fn poll(ptr: *mut (), cx: &mut Context) -> Poll<T>`

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🔬 This is a nightly-only experimental API. (`futures_api` #50547)

futures in libcore are unstable

Poll the future represented by the given void pointer. Read more

####

`unsafe fn drop(_ptr: *mut ())`

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🔬 This is a nightly-only experimental API. (`futures_api` #50547)

futures in libcore are unstable

Drops the future represented by the given void pointer. Read more

###

`impl<'a, T> Pointer for PinMut<'a, T> where T: ?Sized,`

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####

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

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Formats the value using the given formatter.

###

`impl<'a, T> Debug for PinMut<'a, T> where T: Debug + ?Sized,`

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####

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

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Formats the value using the given formatter. Read more

###

`impl<'a, T, U> CoerceUnsized<PinMut<'a, U>> for PinMut<'a, T> where T: Unsize<U> + ?Sized, U: ?Sized,`

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###

`impl<'a, T> Unpin for PinMut<'a, T> where T: ?Sized,`

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###

`impl<'a, F> Future for PinMut<'a, F> where F: Future + ?Sized,`

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

🔬 This is a nightly-only experimental API. (`futures_api` #50547)

futures in libcore are unstable

The result of the `Future`.

####

`fn poll( self: PinMut<PinMut<'a, F>>, cx: &mut Context ) -> Poll<<PinMut<'a, F> as Future>::Output>`

[src]

🔬 This is a nightly-only experimental API. (`futures_api` #50547)

futures in libcore are unstable

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<'a, T> DerefMut for PinMut<'a, T> where T: Unpin + ?Sized,`

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####

`fn deref_mut(&mut self) -> &mut T`

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Mutably dereferences the value.

###

`impl<'a, T> Deref for PinMut<'a, T> where T: ?Sized,`

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#### `type Target = T`

The resulting type after dereferencing.

####

`fn deref(&self) -> &T`

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Dereferences the value.

###

`impl<'a, T> Display for PinMut<'a, T> where T: Display + ?Sized,`

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####

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

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Formats the value using the given formatter. Read more

## Auto Trait Implementations

###

`impl<'a, T: ?Sized> Send for PinMut<'a, T> where T: Send,`

###

`impl<'a, T: ?Sized> Sync for PinMut<'a, T> where T: Sync,`

## Blanket Implementations

###

`impl<T> ToString for T where T: Display + ?Sized,`

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####

`fn to_string(&Self) -> String`

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Converts the given value to a `String`. Read more

###

`impl<T, U> TryFrom for T where T: From<U>,`

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#### `type Error = !`

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

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

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🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

###

`impl<T> From for T`

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####

`fn from(t: T) -> T`

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Performs the conversion.

###

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

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

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

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

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🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

###

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

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####

`fn into(self) -> U`

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Performs the conversion.

###

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

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####

`fn borrow(&self) -> &T`

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Immutably borrows from an owned value. Read more

###

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

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####

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

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Mutably borrows from an owned value. Read more

###

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

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####

`fn get_type_id(&self) -> TypeId`

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🔬 This is a nightly-only experimental API. (`get_type_id` #27745)

this method will likely be replaced by an associated static

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

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