1.33.0[][src]Trait core::marker::Unpin

#[lang = "unpin"]pub auto trait Unpin { }

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.

Implementors

impl !Unpin for PhantomPinned[src]

impl Unpin for Waker[src]

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

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

impl<F> Unpin for PollFn<F>[src]

impl<T> Unpin for Pending<T>[src]

impl<T> Unpin for Ready<T>[src]

impl<T: ?Sized> Unpin for *const T[src]

impl<T: ?Sized> Unpin for *mut T[src]

Loading content...

Auto implementors

impl Unpin for core::cmp::Ordering[src]

impl Unpin for Infallible[src]

impl Unpin for c_void[src]

impl Unpin for Alignment[src]

impl Unpin for FpCategory[src]

impl Unpin for IntErrorKind[src]

impl Unpin for SearchStep[src]

impl Unpin for core::sync::atomic::Ordering[src]

impl Unpin for AllocError[src]

impl Unpin for Layout[src]

impl Unpin for LayoutError[src]

impl Unpin for TypeId[src]

impl Unpin for float64x1_t[src]

impl Unpin for float64x2_t[src]

impl Unpin for int8x16x2_t[src]

impl Unpin for int8x16x3_t[src]

impl Unpin for int8x16x4_t[src]

impl Unpin for poly8x16x2_t[src]

impl Unpin for poly8x16x3_t[src]

impl Unpin for poly8x16x4_t[src]

impl Unpin for uint8x16x2_t[src]

impl Unpin for uint8x16x3_t[src]

impl Unpin for uint8x16x4_t[src]

impl Unpin for APSR[src]

impl Unpin for SY[src]

impl Unpin for float32x2_t[src]

impl Unpin for float32x4_t[src]

impl Unpin for int8x8_t[src]

impl Unpin for int8x8x2_t[src]

impl Unpin for int8x8x3_t[src]

impl Unpin for int8x8x4_t[src]

impl Unpin for int8x16_t[src]

impl Unpin for int16x4_t[src]

impl Unpin for int16x8_t[src]

impl Unpin for int32x2_t[src]

impl Unpin for int32x4_t[src]

impl Unpin for int64x1_t[src]

impl Unpin for int64x2_t[src]

impl Unpin for poly8x8_t[src]

impl Unpin for poly8x8x2_t[src]

impl Unpin for poly8x8x3_t[src]

impl Unpin for poly8x8x4_t[src]

impl Unpin for poly8x16_t[src]

impl Unpin for poly16x4_t[src]

impl Unpin for poly16x8_t[src]

impl Unpin for poly64x1_t[src]

impl Unpin for poly64x2_t[src]

impl Unpin for uint8x8_t[src]

impl Unpin for uint8x8x2_t[src]

impl Unpin for uint8x8x3_t[src]

impl Unpin for uint8x8x4_t[src]

impl Unpin for uint8x16_t[src]

impl Unpin for uint16x4_t[src]

impl Unpin for uint16x8_t[src]

impl Unpin for uint32x2_t[src]

impl Unpin for uint32x4_t[src]

impl Unpin for uint64x1_t[src]

impl Unpin for uint64x2_t[src]

impl Unpin for vector_bool_long[src]

impl Unpin for vector_double[src]

impl Unpin for vector_signed_long[src]

impl Unpin for vector_unsigned_long[src]

impl Unpin for v128[src]

impl Unpin for CpuidResult[src]

impl Unpin for __m128[src]

impl Unpin for __m128d[src]

impl Unpin for __m128i[src]

impl Unpin for __m256[src]

impl Unpin for __m256d[src]

impl Unpin for __m256i[src]

impl Unpin for __m512[src]

impl Unpin for __m512d[src]

impl Unpin for __m512i[src]

impl Unpin for TryFromSliceError[src]

impl Unpin for core::ascii::EscapeDefault[src]

impl Unpin for BorrowError[src]

impl Unpin for BorrowMutError[src]

impl Unpin for CharTryFromError[src]

impl Unpin for DecodeUtf16Error[src]

impl Unpin for core::char::EscapeDebug[src]

impl Unpin for core::char::EscapeDefault[src]

impl Unpin for core::char::EscapeUnicode[src]

impl Unpin for ParseCharError[src]

impl Unpin for ToLowercase[src]

impl Unpin for ToUppercase[src]

impl Unpin for Error[src]

impl Unpin for SipHasher[src]

impl Unpin for NonZeroI8[src]

impl Unpin for NonZeroI16[src]

impl Unpin for NonZeroI32[src]

impl Unpin for NonZeroI64[src]

impl Unpin for NonZeroI128[src]

impl Unpin for NonZeroIsize[src]

impl Unpin for NonZeroU8[src]

impl Unpin for NonZeroU16[src]

impl Unpin for NonZeroU32[src]

impl Unpin for NonZeroU64[src]

impl Unpin for NonZeroU128[src]

impl Unpin for NonZeroUsize[src]

impl Unpin for ParseFloatError[src]

impl Unpin for ParseIntError[src]

impl Unpin for TryFromIntError[src]

impl Unpin for RangeFull[src]

impl Unpin for NoneError[src]

impl Unpin for TraitObject[src]

impl Unpin for Utf8Lossy[src]

impl Unpin for ParseBoolError[src]

impl Unpin for Utf8Error[src]

impl Unpin for AtomicBool[src]

impl Unpin for AtomicI8[src]

impl Unpin for AtomicI16[src]

impl Unpin for AtomicI32[src]

impl Unpin for AtomicI64[src]

impl Unpin for AtomicIsize[src]

impl Unpin for AtomicU8[src]

impl Unpin for AtomicU16[src]

impl Unpin for AtomicU32[src]

impl Unpin for AtomicU64[src]

impl Unpin for AtomicUsize[src]

impl Unpin for RawWaker[src]

impl Unpin for RawWakerVTable[src]

impl Unpin for Duration[src]

impl<'a> Unpin for Arguments<'a>[src]

impl<'a> Unpin for Formatter<'a>[src]

impl<'a> Unpin for Location<'a>[src]

impl<'a> Unpin for PanicInfo<'a>[src]

impl<'a> Unpin for Utf8LossyChunk<'a>[src]

impl<'a> Unpin for Utf8LossyChunksIter<'a>[src]

impl<'a> Unpin for CharSearcher<'a>[src]

impl<'a> Unpin for Bytes<'a>[src]

impl<'a> Unpin for CharIndices<'a>[src]

impl<'a> Unpin for Chars<'a>[src]

impl<'a> Unpin for EncodeUtf16<'a>[src]

impl<'a> Unpin for core::str::EscapeDebug<'a>[src]

impl<'a> Unpin for core::str::EscapeDefault<'a>[src]

impl<'a> Unpin for core::str::EscapeUnicode<'a>[src]

impl<'a> Unpin for Lines<'a>[src]

impl<'a> Unpin for LinesAny<'a>[src]

impl<'a> Unpin for SplitAsciiWhitespace<'a>[src]

impl<'a> Unpin for SplitWhitespace<'a>[src]

impl<'a> Unpin for Context<'a>[src]

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

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

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

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

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

impl<'a, 'b> Unpin for CharSliceSearcher<'a, 'b>[src]

impl<'a, 'b> Unpin for StrSearcher<'a, 'b>[src]

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

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

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

impl<'a, F> Unpin for CharPredicateSearcher<'a, F> where
    F: MultiCharEq + Unpin
[src]

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

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

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

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

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

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

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

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

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

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

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

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

impl<'a, T> Unpin for Chunks<'a, T>[src]

impl<'a, T> Unpin for ChunksExact<'a, T>[src]

impl<'a, T> Unpin for ChunksExactMut<'a, T>[src]

impl<'a, T> Unpin for ChunksMut<'a, T>[src]

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

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

impl<'a, T> Unpin for RChunks<'a, T>[src]

impl<'a, T> Unpin for RChunksExact<'a, T>[src]

impl<'a, T> Unpin for RChunksExactMut<'a, T>[src]

impl<'a, T> Unpin for RChunksMut<'a, T>[src]

impl<'a, T> Unpin for Windows<'a, T>[src]

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

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

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

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

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

impl<'a, T, P> Unpin for SplitInclusive<'a, T, P> where
    P: Unpin
[src]

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

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

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

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

impl<'a, T, const N: usize> Unpin for ArrayChunks<'a, T, N>[src]

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

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

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

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

impl<'f> Unpin for VaListImpl<'f>[src]

impl<A> Unpin for Repeat<A> where
    A: Unpin
[src]

impl<A> Unpin for core::option::IntoIter<A> where
    A: Unpin
[src]

impl<A, B> Unpin for Chain<A, B> where
    A: Unpin,
    B: Unpin
[src]

impl<A, B> Unpin for Zip<A, B> where
    A: Unpin,
    B: Unpin
[src]

impl<B, C> Unpin for ControlFlow<B, C> where
    B: Unpin,
    C: Unpin
[src]

impl<F> Unpin for FromFn<F> where
    F: Unpin
[src]

impl<F> Unpin for OnceWith<F> where
    F: Unpin
[src]

impl<F> Unpin for RepeatWith<F> where
    F: Unpin
[src]

impl<H> Unpin for BuildHasherDefault<H> where
    H: Unpin
[src]

impl<I> Unpin for DecodeUtf16<I> where
    I: Unpin
[src]

impl<I> Unpin for Cloned<I> where
    I: Unpin
[src]

impl<I> Unpin for Copied<I> where
    I: Unpin
[src]

impl<I> Unpin for Cycle<I> where
    I: Unpin
[src]

impl<I> Unpin for Enumerate<I> where
    I: Unpin
[src]

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

impl<I> Unpin for Fuse<I> where
    I: Unpin
[src]

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

impl<I> Unpin for Skip<I> where
    I: Unpin
[src]

impl<I> Unpin for StepBy<I> where
    I: Unpin
[src]

impl<I> Unpin for Take<I> where
    I: Unpin
[src]

impl<I, F> Unpin for FilterMap<I, F> where
    F: Unpin,
    I: Unpin
[src]

impl<I, F> Unpin for Inspect<I, F> where
    F: Unpin,
    I: Unpin
[src]

impl<I, F> Unpin for Map<I, F> where
    F: Unpin,
    I: Unpin
[src]

impl<I, P> Unpin for Filter<I, P> where
    I: Unpin,
    P: Unpin
[src]

impl<I, P> Unpin for MapWhile<I, P> where
    I: Unpin,
    P: Unpin
[src]

impl<I, P> Unpin for SkipWhile<I, P> where
    I: Unpin,
    P: Unpin
[src]

impl<I, P> Unpin for TakeWhile<I, P> where
    I: Unpin,
    P: Unpin
[src]

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

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

impl<Idx> Unpin for Range<Idx> where
    Idx: Unpin
[src]

impl<Idx> Unpin for RangeFrom<Idx> where
    Idx: Unpin
[src]

impl<Idx> Unpin for RangeInclusive<Idx> where
    Idx: Unpin
[src]

impl<Idx> Unpin for RangeTo<Idx> where
    Idx: Unpin
[src]

impl<Idx> Unpin for RangeToInclusive<Idx> where
    Idx: Unpin
[src]

impl<P> Unpin for Pin<P> where
    P: Unpin
[src]

impl<T> Unpin for Bound<T> where
    T: Unpin
[src]

impl<T> Unpin for Option<T> where
    T: Unpin
[src]

impl<T> Unpin for Poll<T> where
    T: Unpin
[src]

impl<T> Unpin for Reverse<T> where
    T: Unpin
[src]

impl<T> Unpin for Empty<T> where
    T: Unpin
[src]

impl<T> Unpin for Once<T> where
    T: Unpin
[src]

impl<T> Unpin for Rev<T> where
    T: Unpin
[src]

impl<T> Unpin for OnceCell<T> where
    T: Unpin
[src]

impl<T> Unpin for Discriminant<T> where
    <T as DiscriminantKind>::Discriminant: Unpin
[src]

impl<T> Unpin for Wrapping<T> where
    T: Unpin
[src]

impl<T> Unpin for core::result::IntoIter<T> where
    T: Unpin
[src]

impl<T> Unpin for AtomicPtr<T>[src]

impl<T> Unpin for MaybeUninit<T> where
    T: Unpin
[src]

impl<T, E> Unpin for Result<T, E> where
    E: Unpin,
    T: Unpin
[src]

impl<T, F> Unpin for Successors<T, F> where
    F: Unpin,
    T: Unpin
[src]

impl<T, F> Unpin for Lazy<T, F> where
    F: Unpin,
    T: Unpin
[src]

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

impl<T: ?Sized> Unpin for Cell<T> where
    T: Unpin
[src]

impl<T: ?Sized> Unpin for RefCell<T> where
    T: Unpin
[src]

impl<T: ?Sized> Unpin for UnsafeCell<T> where
    T: Unpin
[src]

impl<T: ?Sized> Unpin for PhantomData<T> where
    T: Unpin
[src]

impl<T: ?Sized> Unpin for ManuallyDrop<T> where
    T: Unpin
[src]

impl<T: ?Sized> Unpin for NonNull<T>[src]

impl<Y, R> Unpin for GeneratorState<Y, R> where
    R: Unpin,
    Y: Unpin
[src]

Loading content...