Trait core::marker::Unpin

1.33.0 · source ·
pub auto trait Unpin { }
Expand description

Types that can be safely moved after being pinned.

Rust itself has no notion of immovable types, and considers moves (e.g., through assignment or mem::replace) to always be safe.

The Pin type is used instead to prevent moves through the type system. Pointers P<T> wrapped in the Pin<P<T>> wrapper can’t be moved out of. See the pin module documentation for more information on pinning.

Implementing the Unpin trait for T lifts the restrictions of pinning off the type, which then allows moving T out of Pin<P<T>> with functions such as mem::replace.

Unpin has no consequence at all for non-pinned data. In particular, mem::replace happily moves !Unpin data (it works for any &mut T, not just when T: Unpin). However, you cannot use mem::replace on data wrapped inside a Pin<P<T>> because you cannot get the &mut T you need for that, and that is what makes this system work.

So this, for example, can only be done on types implementing Unpin:

use std::mem;
use std::pin::Pin;

let mut string = "this".to_string();
let mut pinned_string = Pin::new(&mut string);

// We need a mutable reference to call `mem::replace`.
// We can obtain such a reference by (implicitly) invoking `Pin::deref_mut`,
// but that is only possible because `String` implements `Unpin`.
mem::replace(&mut *pinned_string, "other".to_string());
Run

This trait is automatically implemented for almost every type.

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impl !Unpin for PhantomPinned

1.36.0 · source§

impl Unpin for Waker

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impl<'a, T: ?Sized + 'a> Unpin for &'a T

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impl<'a, T: ?Sized + 'a> Unpin for &'a mut T

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impl<Dyn: ?Sized> Unpin for DynMetadata<Dyn>

1.64.0 · source§

impl<F: Unpin> Unpin for PollFn<F>

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impl<I> Unpin for FromIter<I>

1.48.0 · source§

impl<T> Unpin for core::future::Ready<T>

1.38.0 · source§

impl<T: ?Sized> Unpin for *const T

1.38.0 · source§

impl<T: ?Sized> Unpin for *mut T

Auto implementors§

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impl Unpin for core::cmp::Ordering

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impl Unpin for Infallible

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impl Unpin for c_void

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impl Unpin for core::fmt::Alignment

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impl Unpin for FpCategory

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impl Unpin for IntErrorKind

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impl Unpin for Which

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impl Unpin for SearchStep

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impl Unpin for core::sync::atomic::Ordering

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impl Unpin for bool

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impl Unpin for char

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impl Unpin for f32

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impl Unpin for f64

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impl Unpin for i8

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impl Unpin for i16

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impl Unpin for i32

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impl Unpin for i64

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impl Unpin for i128

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impl Unpin for isize

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impl Unpin for str

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impl Unpin for u8

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impl Unpin for u16

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impl Unpin for u32

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impl Unpin for u64

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impl Unpin for u128

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impl Unpin for ()

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impl Unpin for usize

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impl Unpin for AllocError

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impl Unpin for Layout

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impl Unpin for LayoutError

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impl Unpin for TypeId

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impl Unpin for float64x1_t

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impl Unpin for float64x1x2_t

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impl Unpin for float64x1x3_t

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impl Unpin for float64x1x4_t

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impl Unpin for float64x2_t

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impl Unpin for float64x2x2_t

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impl Unpin for float64x2x3_t

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impl Unpin for float64x2x4_t

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impl Unpin for int16x2_t

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impl Unpin for uint16x2_t

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impl Unpin for APSR

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impl Unpin for SY

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impl Unpin for float32x2_t

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impl Unpin for float32x2x2_t

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impl Unpin for float32x2x3_t

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impl Unpin for float32x2x4_t

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impl Unpin for float32x4_t

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impl Unpin for float32x4x2_t

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impl Unpin for float32x4x3_t

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impl Unpin for float32x4x4_t

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impl Unpin for int8x4_t

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impl Unpin for int8x8_t

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impl Unpin for int8x8x2_t

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impl Unpin for int8x8x3_t

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impl Unpin for int8x8x4_t

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impl Unpin for int8x16_t

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impl Unpin for int8x16x2_t

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impl Unpin for int8x16x3_t

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impl Unpin for int8x16x4_t

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impl Unpin for int16x4_t

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impl Unpin for int16x4x2_t

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impl Unpin for int16x4x3_t

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impl Unpin for int16x4x4_t

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impl Unpin for int16x8_t

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impl Unpin for int16x8x2_t

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impl Unpin for int16x8x3_t

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impl Unpin for int16x8x4_t

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impl Unpin for int32x2_t

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impl Unpin for int32x2x2_t

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impl Unpin for int32x2x3_t

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impl Unpin for int32x2x4_t

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impl Unpin for int32x4_t

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impl Unpin for int32x4x2_t

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impl Unpin for int32x4x3_t

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impl Unpin for int32x4x4_t

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impl Unpin for int64x1_t

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impl Unpin for int64x1x2_t

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impl Unpin for int64x1x3_t

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impl Unpin for int64x1x4_t

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impl Unpin for int64x2_t

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impl Unpin for int64x2x2_t

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impl Unpin for int64x2x3_t

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impl Unpin for int64x2x4_t

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impl Unpin for poly8x8_t

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impl Unpin for poly8x8x2_t

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impl Unpin for poly8x8x3_t

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impl Unpin for poly8x8x4_t

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impl Unpin for poly8x16_t

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impl Unpin for poly8x16x2_t

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impl Unpin for poly8x16x3_t

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impl Unpin for poly8x16x4_t

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impl Unpin for poly16x4_t

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impl Unpin for poly16x4x2_t

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impl Unpin for poly16x4x3_t

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impl Unpin for poly16x4x4_t

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impl Unpin for poly16x8_t

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impl Unpin for poly16x8x2_t

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impl Unpin for poly16x8x3_t

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impl Unpin for poly16x8x4_t

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impl Unpin for poly64x1_t

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impl Unpin for poly64x1x2_t

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impl Unpin for poly64x1x3_t

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impl Unpin for poly64x1x4_t

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impl Unpin for poly64x2_t

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impl Unpin for poly64x2x2_t

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impl Unpin for poly64x2x3_t

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impl Unpin for poly64x2x4_t

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impl Unpin for uint8x4_t

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impl Unpin for uint8x8_t

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impl Unpin for uint8x8x2_t

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impl Unpin for uint8x8x3_t

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impl Unpin for uint8x8x4_t

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impl Unpin for uint8x16_t

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impl Unpin for uint8x16x2_t

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impl Unpin for uint8x16x3_t

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impl Unpin for uint8x16x4_t

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impl Unpin for uint16x4_t

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impl Unpin for uint16x4x2_t

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impl Unpin for uint16x4x3_t

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impl Unpin for uint16x4x4_t

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impl Unpin for uint16x8_t

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impl Unpin for uint16x8x2_t

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impl Unpin for uint16x8x3_t

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impl Unpin for uint16x8x4_t

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impl Unpin for uint32x2_t

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impl Unpin for uint32x2x2_t

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impl Unpin for uint32x2x3_t

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impl Unpin for uint32x2x4_t

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impl Unpin for uint32x4_t

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impl Unpin for uint32x4x2_t

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impl Unpin for uint32x4x3_t

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impl Unpin for uint32x4x4_t

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impl Unpin for uint64x1_t

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impl Unpin for uint64x1x2_t

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impl Unpin for uint64x1x3_t

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impl Unpin for uint64x1x4_t

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impl Unpin for uint64x2_t

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impl Unpin for uint64x2x2_t

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impl Unpin for uint64x2x3_t

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impl Unpin for uint64x2x4_t

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impl Unpin for vector_bool_long

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impl Unpin for vector_double

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impl Unpin for vector_signed_long

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impl Unpin for vector_unsigned_long

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impl Unpin for v128

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impl Unpin for CpuidResult

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impl Unpin for __m128

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impl Unpin for __m128bh

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impl Unpin for __m128d

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impl Unpin for __m128i

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impl Unpin for __m256

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impl Unpin for __m256bh

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impl Unpin for __m256d

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impl Unpin for __m256i

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impl Unpin for __m512

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impl Unpin for __m512bh

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impl Unpin for __m512d

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impl Unpin for __m512i

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impl Unpin for TryFromSliceError

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impl Unpin for core::ascii::EscapeDefault

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impl Unpin for BorrowError

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impl Unpin for BorrowMutError

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impl Unpin for CharTryFromError

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impl Unpin for DecodeUtf16Error

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impl Unpin for core::char::EscapeDebug

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impl Unpin for core::char::EscapeDefault

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impl Unpin for core::char::EscapeUnicode

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impl Unpin for ParseCharError

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impl Unpin for ToLowercase

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impl Unpin for ToUppercase

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impl Unpin for TryFromCharError

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impl Unpin for CStr

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impl Unpin for FromBytesUntilNulError

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impl Unpin for FromBytesWithNulError

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impl Unpin for Error

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impl Unpin for SipHasher

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impl Unpin for BasicBlock

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impl Unpin for Assume

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impl Unpin for NonZeroI8

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impl Unpin for NonZeroI16

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impl Unpin for NonZeroI32

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impl Unpin for NonZeroI64

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impl Unpin for NonZeroI128

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impl Unpin for NonZeroIsize

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impl Unpin for NonZeroU8

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impl Unpin for NonZeroU16

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impl Unpin for NonZeroU32

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impl Unpin for NonZeroU64

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impl Unpin for NonZeroU128

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impl Unpin for NonZeroUsize

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impl Unpin for ParseFloatError

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impl Unpin for ParseIntError

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impl Unpin for TryFromIntError

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impl Unpin for RangeFull

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impl Unpin for core::ptr::Alignment

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impl Unpin for TimSortRun

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impl Unpin for ParseBoolError

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impl Unpin for Utf8Error

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impl Unpin for AtomicBool

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impl Unpin for AtomicI8

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impl Unpin for AtomicI16

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impl Unpin for AtomicI32

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impl Unpin for AtomicI64

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impl Unpin for AtomicIsize

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impl Unpin for AtomicU8

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impl Unpin for AtomicU16

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impl Unpin for AtomicU32

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impl Unpin for AtomicU64

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impl Unpin for AtomicUsize

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impl Unpin for RawWaker

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impl Unpin for RawWakerVTable

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impl Unpin for Duration

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impl Unpin for TryFromFloatSecsError

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impl<'a> !Unpin for Demand<'a>

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impl<'a> Unpin for Source<'a>

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impl<'a> Unpin for Arguments<'a>

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impl<'a> Unpin for Formatter<'a>

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impl<'a> Unpin for Location<'a>

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impl<'a> Unpin for PanicInfo<'a>

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impl<'a> Unpin for EscapeAscii<'a>

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impl<'a> Unpin for CharSearcher<'a>

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impl<'a> Unpin for Bytes<'a>

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impl<'a> Unpin for CharIndices<'a>

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impl<'a> Unpin for Chars<'a>

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impl<'a> Unpin for EncodeUtf16<'a>

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impl<'a> Unpin for core::str::EscapeDebug<'a>

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impl<'a> Unpin for core::str::EscapeDefault<'a>

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impl<'a> Unpin for core::str::EscapeUnicode<'a>

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impl<'a> Unpin for Lines<'a>

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impl<'a> Unpin for LinesAny<'a>

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impl<'a> Unpin for SplitAsciiWhitespace<'a>

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impl<'a> Unpin for SplitWhitespace<'a>

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impl<'a> Unpin for Utf8Chunk<'a>

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impl<'a> Unpin for Utf8Chunks<'a>

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impl<'a> Unpin for Context<'a>

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impl<'a, 'b> Unpin for DebugList<'a, 'b>where 'b: 'a,

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impl<'a, 'b> Unpin for DebugMap<'a, 'b>where 'b: 'a,

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impl<'a, 'b> Unpin for DebugSet<'a, 'b>where 'b: 'a,

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impl<'a, 'b> Unpin for DebugStruct<'a, 'b>where 'b: 'a,

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impl<'a, 'b> Unpin for DebugTuple<'a, 'b>where 'b: 'a,

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impl<'a, 'b> Unpin for CharSliceSearcher<'a, 'b>

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impl<'a, 'b> Unpin for StrSearcher<'a, 'b>

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impl<'a, 'b, const N: usize> Unpin for CharArrayRefSearcher<'a, 'b, N>

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impl<'a, 'f> Unpin for VaList<'a, 'f>where 'f: 'a,

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impl<'a, A> Unpin for core::option::Iter<'a, A>

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impl<'a, A> Unpin for core::option::IterMut<'a, A>

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impl<'a, F> Unpin for CharPredicateSearcher<'a, F>where F: Unpin,

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impl<'a, I> Unpin for ByRefSized<'a, I>

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impl<'a, P> Unpin for MatchIndices<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, P> Unpin for Matches<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, P> Unpin for RMatchIndices<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, P> Unpin for RMatches<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, P> Unpin for core::str::RSplit<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, P> Unpin for core::str::RSplitN<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, P> Unpin for RSplitTerminator<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, P> Unpin for core::str::Split<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, P> Unpin for core::str::SplitInclusive<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, P> Unpin for core::str::SplitN<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, P> Unpin for SplitTerminator<'a, P>where <P as Pattern<'a>>::Searcher: Unpin,

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impl<'a, T> Unpin for core::result::Iter<'a, T>

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impl<'a, T> Unpin for core::result::IterMut<'a, T>

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impl<'a, T> Unpin for Chunks<'a, T>

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impl<'a, T> Unpin for ChunksExact<'a, T>

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impl<'a, T> Unpin for ChunksExactMut<'a, T>

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impl<'a, T> Unpin for ChunksMut<'a, T>

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impl<'a, T> Unpin for core::slice::Iter<'a, T>

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impl<'a, T> Unpin for core::slice::IterMut<'a, T>

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impl<'a, T> Unpin for RChunks<'a, T>

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impl<'a, T> Unpin for RChunksExact<'a, T>

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impl<'a, T> Unpin for RChunksExactMut<'a, T>

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impl<'a, T> Unpin for RChunksMut<'a, T>

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impl<'a, T> Unpin for Windows<'a, T>

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impl<'a, T, P> Unpin for GroupBy<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for GroupByMut<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for core::slice::RSplit<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for RSplitMut<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for core::slice::RSplitN<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for RSplitNMut<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for core::slice::Split<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for core::slice::SplitInclusive<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for SplitInclusiveMut<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for SplitMut<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for core::slice::SplitN<'a, T, P>where P: Unpin,

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impl<'a, T, P> Unpin for SplitNMut<'a, T, P>where P: Unpin,

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impl<'a, T, const N: usize> Unpin for core::slice::ArrayChunks<'a, T, N>

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impl<'a, T, const N: usize> Unpin for ArrayChunksMut<'a, T, N>

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impl<'a, T, const N: usize> Unpin for ArrayWindows<'a, T, N>

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impl<'a, const N: usize> Unpin for CharArraySearcher<'a, N>

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impl<'b, T: ?Sized> Unpin for Ref<'b, T>

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impl<'b, T: ?Sized> Unpin for RefMut<'b, T>

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impl<'f> Unpin for VaListImpl<'f>

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impl<A> Unpin for Repeat<A>where A: Unpin,

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impl<A> Unpin for core::option::IntoIter<A>where A: Unpin,

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impl<A, B> Unpin for Chain<A, B>where A: Unpin, B: Unpin,

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impl<A, B> Unpin for Zip<A, B>where A: Unpin, B: Unpin,

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impl<B, C> Unpin for ControlFlow<B, C>where B: Unpin, C: Unpin,

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impl<F> Unpin for FromFn<F>where F: Unpin,

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impl<F> Unpin for OnceWith<F>where F: Unpin,

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impl<F> Unpin for RepeatWith<F>where F: Unpin,

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impl<H> Unpin for BuildHasherDefault<H>

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impl<I> Unpin for DecodeUtf16<I>where I: Unpin,

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impl<I> Unpin for Cloned<I>where I: Unpin,

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impl<I> Unpin for Copied<I>where I: Unpin,

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impl<I> Unpin for Cycle<I>where I: Unpin,

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impl<I> Unpin for Enumerate<I>where I: Unpin,

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impl<I> Unpin for Flatten<I>where I: Unpin, <<I as Iterator>::Item as IntoIterator>::IntoIter: Unpin,

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impl<I> Unpin for Fuse<I>where I: Unpin,

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impl<I> Unpin for Intersperse<I>where I: Unpin, <I as Iterator>::Item: Unpin,

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impl<I> Unpin for Peekable<I>where I: Unpin, <I as Iterator>::Item: Unpin,

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impl<I> Unpin for Skip<I>where I: Unpin,

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impl<I> Unpin for StepBy<I>where I: Unpin,

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impl<I> Unpin for Take<I>where I: Unpin,

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impl<I, F> Unpin for FilterMap<I, F>where F: Unpin, I: Unpin,

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impl<I, F> Unpin for Inspect<I, F>where F: Unpin, I: Unpin,

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impl<I, F> Unpin for Map<I, F>where F: Unpin, I: Unpin,

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impl<I, G> Unpin for IntersperseWith<I, G>where G: Unpin, I: Unpin, <I as Iterator>::Item: Unpin,

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impl<I, P> Unpin for Filter<I, P>where I: Unpin, P: Unpin,

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impl<I, P> Unpin for MapWhile<I, P>where I: Unpin, P: Unpin,

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impl<I, P> Unpin for SkipWhile<I, P>where I: Unpin, P: Unpin,

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impl<I, P> Unpin for TakeWhile<I, P>where I: Unpin, P: Unpin,

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impl<I, St, F> Unpin for Scan<I, St, F>where F: Unpin, I: Unpin, St: Unpin,

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impl<I, U, F> Unpin for FlatMap<I, U, F>where F: Unpin, I: Unpin, <U as IntoIterator>::IntoIter: Unpin,

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impl<I, const N: usize> Unpin for core::iter::ArrayChunks<I, N>where I: Unpin, <I as Iterator>::Item: Unpin,

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impl<Idx> Unpin for Range<Idx>where Idx: Unpin,

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impl<Idx> Unpin for RangeFrom<Idx>where Idx: Unpin,

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impl<Idx> Unpin for RangeInclusive<Idx>where Idx: Unpin,

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impl<Idx> Unpin for RangeTo<Idx>where Idx: Unpin,

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impl<Idx> Unpin for RangeToInclusive<Idx>where Idx: Unpin,

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impl<P> Unpin for Pin<P>where P: Unpin,

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impl<Ret, T> Unpin for fn (T₁, T₂, …, Tₙ) -> Ret

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

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

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

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impl<T> Unpin for [T]where T: Unpin,

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impl<T> Unpin for (T₁, T₂, …, Tₙ)where T: Unpin,

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

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

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impl<T> Unpin for Pending<T>

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impl<T> Unpin for Empty<T>

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

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

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impl<T> Unpin for Discriminant<T>

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

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

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

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

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impl<T> Unpin for core::result::IntoIter<T>where T: Unpin,

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impl<T> Unpin for AtomicPtr<T>

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impl<T> Unpin for core::task::Ready<T>where T: Unpin,

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

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impl<T, E> Unpin for Result<T, E>where E: Unpin, T: Unpin,

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impl<T, F> Unpin for LazyCell<T, F>where F: Unpin, T: Unpin,

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impl<T, F> Unpin for Successors<T, F>where F: Unpin, T: Unpin,

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impl<T, const LANES: usize> Unpin for Mask<T, LANES>where T: Unpin,

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impl<T, const LANES: usize> Unpin for Simd<T, LANES>where T: Unpin,

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impl<T, const N: usize> Unpin for [T; N]where T: Unpin,

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impl<T, const N: usize> Unpin for core::array::IntoIter<T, N>where T: Unpin,

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impl<T, const N: usize> Unpin for [MaybeUninit<T>; N]where T: Unpin,

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impl<T: ?Sized> Unpin for Cell<T>where T: Unpin,

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impl<T: ?Sized> Unpin for RefCell<T>where T: Unpin,

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impl<T: ?Sized> Unpin for SyncUnsafeCell<T>where T: Unpin,

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impl<T: ?Sized> Unpin for UnsafeCell<T>where T: Unpin,

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impl<T: ?Sized> Unpin for ManuallyDrop<T>where T: Unpin,

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impl<T: ?Sized> Unpin for NonNull<T>

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impl<T: ?Sized> Unpin for Exclusive<T>where T: Unpin,

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impl<T: ?Sized> Unpin for PhantomData<T>where T: Unpin,

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impl<Y, R> Unpin for GeneratorState<Y, R>where R: Unpin, Y: Unpin,

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impl<const LANES: usize> Unpin for LaneCount<LANES>

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impl<const N: usize> Unpin for GetManyMutError<N>