1.33.0[−][src]Trait core::marker::Unpin
Types that can be safely moved after being pinned.
Since Rust itself has no notion of immovable types, and considers moves
(e.g., through assignment or mem::replace
) to always be safe,
this trait cannot prevent types from moving by itself.
Instead it is used to prevent moves through the type system,
by controlling the behavior of pointers P
wrapped in the Pin<P>
wrapper,
which "pin" the type in place by not allowing it to be moved out of them.
See the pin module
documentation for more information on pinning.
Implementing this trait lifts the restrictions of pinning off a type,
which then allows it to move out 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>
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<T: ?Sized> Unpin for *const T
[src]
impl<T: ?Sized> Unpin for *mut T
[src]
Auto implementors
impl Unpin for core::cmp::Ordering
impl Unpin for Infallible
impl Unpin for c_void
impl Unpin for Alignment
impl Unpin for FpCategory
impl Unpin for IntErrorKind
impl Unpin for SearchStep
impl Unpin for core::sync::atomic::Ordering
impl Unpin for AllocErr
impl Unpin for CannotReallocInPlace
impl Unpin for Excess
impl Unpin for Layout
impl Unpin for LayoutErr
impl Unpin for TypeId
impl Unpin for float64x1_t
impl Unpin for float64x2_t
impl Unpin for int8x16x2_t
impl Unpin for int8x16x3_t
impl Unpin for int8x16x4_t
impl Unpin for poly64x1_t
impl Unpin for poly64x2_t
impl Unpin for poly8x16x2_t
impl Unpin for poly8x16x3_t
impl Unpin for poly8x16x4_t
impl Unpin for uint8x16x2_t
impl Unpin for uint8x16x3_t
impl Unpin for uint8x16x4_t
impl Unpin for APSR
impl Unpin for SY
impl Unpin for float32x2_t
impl Unpin for float32x4_t
impl Unpin for int16x4_t
impl Unpin for int16x8_t
impl Unpin for int32x2_t
impl Unpin for int32x4_t
impl Unpin for int64x1_t
impl Unpin for int64x2_t
impl Unpin for int8x16_t
impl Unpin for int8x8_t
impl Unpin for int8x8x2_t
impl Unpin for int8x8x3_t
impl Unpin for int8x8x4_t
impl Unpin for poly16x4_t
impl Unpin for poly16x8_t
impl Unpin for poly8x16_t
impl Unpin for poly8x8_t
impl Unpin for poly8x8x2_t
impl Unpin for poly8x8x3_t
impl Unpin for poly8x8x4_t
impl Unpin for uint16x4_t
impl Unpin for uint16x8_t
impl Unpin for uint32x2_t
impl Unpin for uint32x4_t
impl Unpin for uint64x1_t
impl Unpin for uint64x2_t
impl Unpin for uint8x16_t
impl Unpin for uint8x8_t
impl Unpin for uint8x8x2_t
impl Unpin for uint8x8x3_t
impl Unpin for uint8x8x4_t
impl Unpin for v16i8
impl Unpin for v16u8
impl Unpin for v2f64
impl Unpin for v2i64
impl Unpin for v2u64
impl Unpin for v4f32
impl Unpin for v4i32
impl Unpin for v4u32
impl Unpin for v8i16
impl Unpin for v8u16
impl Unpin for vector_bool_long
impl Unpin for vector_double
impl Unpin for vector_signed_long
impl Unpin for vector_unsigned_long
impl Unpin for v128
impl Unpin for CpuidResult
impl Unpin for __m128
impl Unpin for __m128d
impl Unpin for __m128i
impl Unpin for __m256
impl Unpin for __m256d
impl Unpin for __m256i
impl Unpin for __m512
impl Unpin for __m512d
impl Unpin for __m512i
impl Unpin for __m64
impl Unpin for TryFromSliceError
impl Unpin for core::ascii::EscapeDefault
impl Unpin for BorrowError
impl Unpin for BorrowMutError
impl Unpin for CharTryFromError
impl Unpin for DecodeUtf16Error
impl Unpin for core::char::EscapeDebug
impl Unpin for core::char::EscapeDefault
impl Unpin for core::char::EscapeUnicode
impl Unpin for ParseCharError
impl Unpin for ToLowercase
impl Unpin for ToUppercase
impl Unpin for UnicodeVersion
impl Unpin for Error
impl Unpin for SipHasher
impl Unpin for NonZeroI128
impl Unpin for NonZeroI16
impl Unpin for NonZeroI32
impl Unpin for NonZeroI64
impl Unpin for NonZeroI8
impl Unpin for NonZeroIsize
impl Unpin for NonZeroU128
impl Unpin for NonZeroU16
impl Unpin for NonZeroU32
impl Unpin for NonZeroU64
impl Unpin for NonZeroU8
impl Unpin for NonZeroUsize
impl Unpin for ParseFloatError
impl Unpin for ParseIntError
impl Unpin for TryFromIntError
impl Unpin for RangeFull
impl Unpin for NoneError
impl Unpin for TraitObject
impl Unpin for Utf8Lossy
impl Unpin for ParseBoolError
impl Unpin for Utf8Error
impl Unpin for AtomicBool
impl Unpin for AtomicI16
impl Unpin for AtomicI32
impl Unpin for AtomicI64
impl Unpin for AtomicI8
impl Unpin for AtomicIsize
impl Unpin for AtomicU16
impl Unpin for AtomicU32
impl Unpin for AtomicU64
impl Unpin for AtomicU8
impl Unpin for AtomicUsize
impl Unpin for RawWaker
impl Unpin for RawWakerVTable
impl Unpin for Duration
impl<'a> Unpin for Arguments<'a>
impl<'a> Unpin for Formatter<'a>
impl<'a> Unpin for Location<'a>
impl<'a> Unpin for PanicInfo<'a>
impl<'a> Unpin for Utf8LossyChunk<'a>
impl<'a> Unpin for Utf8LossyChunksIter<'a>
impl<'a> Unpin for CharSearcher<'a>
impl<'a> Unpin for Bytes<'a>
impl<'a> Unpin for CharIndices<'a>
impl<'a> Unpin for Chars<'a>
impl<'a> Unpin for EncodeUtf16<'a>
impl<'a> Unpin for core::str::EscapeDebug<'a>
impl<'a> Unpin for core::str::EscapeDefault<'a>
impl<'a> Unpin for core::str::EscapeUnicode<'a>
impl<'a> Unpin for Lines<'a>
impl<'a> Unpin for LinesAny<'a>
impl<'a> Unpin for SplitAsciiWhitespace<'a>
impl<'a> Unpin for SplitWhitespace<'a>
impl<'a> Unpin for Context<'a>
impl<'a, 'b> Unpin for DebugList<'a, 'b> where
'b: 'a,
'b: 'a,
impl<'a, 'b> Unpin for DebugMap<'a, 'b> where
'b: 'a,
'b: 'a,
impl<'a, 'b> Unpin for DebugSet<'a, 'b> where
'b: 'a,
'b: 'a,
impl<'a, 'b> Unpin for DebugStruct<'a, 'b> where
'b: 'a,
'b: 'a,
impl<'a, 'b> Unpin for DebugTuple<'a, 'b> where
'b: 'a,
'b: 'a,
impl<'a, 'b> Unpin for CharSliceSearcher<'a, 'b>
impl<'a, 'b> Unpin for StrSearcher<'a, 'b>
impl<'a, 'f> Unpin for VaList<'a, 'f> where
'f: 'a,
'f: 'a,
impl<'a, A> Unpin for core::option::Iter<'a, A>
impl<'a, A> Unpin for core::option::IterMut<'a, A>
impl<'a, F> Unpin for CharPredicateSearcher<'a, F> where
F: MultiCharEq + Unpin,
F: MultiCharEq + Unpin,
impl<'a, P> Unpin for MatchIndices<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for Matches<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for RMatchIndices<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for RMatches<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for core::str::RSplit<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for core::str::RSplitN<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for RSplitTerminator<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for core::str::Split<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for core::str::SplitN<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for SplitTerminator<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, T> Unpin for core::result::Iter<'a, T>
impl<'a, T> Unpin for core::result::IterMut<'a, T>
impl<'a, T> Unpin for Chunks<'a, T>
impl<'a, T> Unpin for ChunksExact<'a, T>
impl<'a, T> Unpin for ChunksExactMut<'a, T>
impl<'a, T> Unpin for ChunksMut<'a, T>
impl<'a, T> Unpin for core::slice::Iter<'a, T>
impl<'a, T> Unpin for core::slice::IterMut<'a, T>
impl<'a, T> Unpin for RChunks<'a, T>
impl<'a, T> Unpin for RChunksExact<'a, T>
impl<'a, T> Unpin for RChunksExactMut<'a, T>
impl<'a, T> Unpin for RChunksMut<'a, T>
impl<'a, T> Unpin for Windows<'a, T>
impl<'a, T, P> Unpin for core::slice::RSplit<'a, T, P> where
P: Unpin,
P: Unpin,
impl<'a, T, P> Unpin for RSplitMut<'a, T, P> where
P: Unpin,
P: Unpin,
impl<'a, T, P> Unpin for core::slice::RSplitN<'a, T, P> where
P: Unpin,
P: Unpin,
impl<'a, T, P> Unpin for RSplitNMut<'a, T, P> where
P: Unpin,
P: Unpin,
impl<'a, T, P> Unpin for core::slice::Split<'a, T, P> where
P: Unpin,
P: Unpin,
impl<'a, T, P> Unpin for SplitMut<'a, T, P> where
P: Unpin,
P: Unpin,
impl<'a, T, P> Unpin for core::slice::SplitN<'a, T, P> where
P: Unpin,
P: Unpin,
impl<'a, T, P> Unpin for SplitNMut<'a, T, P> where
P: Unpin,
P: Unpin,
impl<'b, T: ?Sized> Unpin for Ref<'b, T>
impl<'b, T: ?Sized> Unpin for RefMut<'b, T>
impl<'f> Unpin for VaListImpl<'f>
impl<A> Unpin for Repeat<A> where
A: Unpin,
A: Unpin,
impl<A> Unpin for core::option::IntoIter<A> where
A: Unpin,
A: Unpin,
impl<A, B> Unpin for Chain<A, B> where
A: Unpin,
B: Unpin,
A: Unpin,
B: Unpin,
impl<A, B> Unpin for Zip<A, B> where
A: Unpin,
B: Unpin,
A: Unpin,
B: Unpin,
impl<F> Unpin for FromFn<F> where
F: Unpin,
F: Unpin,
impl<F> Unpin for OnceWith<F> where
F: Unpin,
F: Unpin,
impl<F> Unpin for RepeatWith<F> where
F: Unpin,
F: Unpin,
impl<H> Unpin for BuildHasherDefault<H> where
H: Unpin,
H: Unpin,
impl<I> Unpin for DecodeUtf16<I> where
I: Unpin,
I: Unpin,
impl<I> Unpin for Cloned<I> where
I: Unpin,
I: Unpin,
impl<I> Unpin for Copied<I> where
I: Unpin,
I: Unpin,
impl<I> Unpin for Cycle<I> where
I: Unpin,
I: Unpin,
impl<I> Unpin for Enumerate<I> where
I: Unpin,
I: Unpin,
impl<I> Unpin for Flatten<I> where
I: Unpin,
<<I as Iterator>::Item as IntoIterator>::IntoIter: Unpin,
I: Unpin,
<<I as Iterator>::Item as IntoIterator>::IntoIter: Unpin,
impl<I> Unpin for Fuse<I> where
I: Unpin,
I: Unpin,
impl<I> Unpin for Peekable<I> where
I: Unpin,
<I as Iterator>::Item: Unpin,
I: Unpin,
<I as Iterator>::Item: Unpin,
impl<I> Unpin for Skip<I> where
I: Unpin,
I: Unpin,
impl<I> Unpin for StepBy<I> where
I: Unpin,
I: Unpin,
impl<I> Unpin for Take<I> where
I: Unpin,
I: Unpin,
impl<I, F> Unpin for FilterMap<I, F> where
F: Unpin,
I: Unpin,
F: Unpin,
I: Unpin,
impl<I, F> Unpin for Inspect<I, F> where
F: Unpin,
I: Unpin,
F: Unpin,
I: Unpin,
impl<I, F> Unpin for Map<I, F> where
F: Unpin,
I: Unpin,
F: Unpin,
I: Unpin,
impl<I, P> Unpin for Filter<I, P> where
I: Unpin,
P: Unpin,
I: Unpin,
P: Unpin,
impl<I, P> Unpin for SkipWhile<I, P> where
I: Unpin,
P: Unpin,
I: Unpin,
P: Unpin,
impl<I, P> Unpin for TakeWhile<I, P> where
I: Unpin,
P: Unpin,
I: Unpin,
P: Unpin,
impl<I, St, F> Unpin for Scan<I, St, F> where
F: Unpin,
I: Unpin,
St: Unpin,
F: Unpin,
I: Unpin,
St: Unpin,
impl<I, U, F> Unpin for FlatMap<I, U, F> where
F: Unpin,
I: Unpin,
<U as IntoIterator>::IntoIter: Unpin,
F: Unpin,
I: Unpin,
<U as IntoIterator>::IntoIter: Unpin,
impl<Idx> Unpin for Range<Idx> where
Idx: Unpin,
Idx: Unpin,
impl<Idx> Unpin for RangeFrom<Idx> where
Idx: Unpin,
Idx: Unpin,
impl<Idx> Unpin for RangeInclusive<Idx> where
Idx: Unpin,
Idx: Unpin,
impl<Idx> Unpin for RangeTo<Idx> where
Idx: Unpin,
Idx: Unpin,
impl<Idx> Unpin for RangeToInclusive<Idx> where
Idx: Unpin,
Idx: Unpin,
impl<P> Unpin for Pin<P> where
P: Unpin,
P: Unpin,
impl<T> Unpin for Bound<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for Option<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for Poll<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for Reverse<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for Empty<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for Once<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for Rev<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for Discriminant<T>
impl<T> Unpin for Wrapping<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for core::result::IntoIter<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for AtomicPtr<T>
impl<T> Unpin for MaybeUninit<T> where
T: Unpin,
T: Unpin,
impl<T, E> Unpin for Result<T, E> where
E: Unpin,
T: Unpin,
E: Unpin,
T: Unpin,
impl<T, F> Unpin for Successors<T, F> where
F: Unpin,
T: Unpin,
F: Unpin,
T: Unpin,
impl<T: ?Sized> Unpin for Cell<T> where
T: Unpin,
T: Unpin,
impl<T: ?Sized> Unpin for RefCell<T> where
T: Unpin,
T: Unpin,
impl<T: ?Sized> Unpin for UnsafeCell<T> where
T: Unpin,
T: Unpin,
impl<T: ?Sized> Unpin for PhantomData<T> where
T: Unpin,
T: Unpin,
impl<T: ?Sized> Unpin for ManuallyDrop<T> where
T: Unpin,
T: Unpin,
impl<T: ?Sized> Unpin for NonNull<T>
impl<Y, R> Unpin for GeneratorState<Y, R> where
R: Unpin,
Y: Unpin,
R: Unpin,
Y: Unpin,