1.33.0[−][src]Trait no_std_compat::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());
This trait is automatically implemented for almost every type.
Implementations on Foreign Types
impl Unpin for Argument
impl Unpin for FormatSpec
impl Unpin for Alignment
impl Unpin for Count
impl Unpin for Big32x40
impl Unpin for Big8x3
impl Unpin for Sign
impl<'a> Unpin for Decimal<'a>
impl<'a> Unpin for ParseResult<'a>
impl Unpin for Unpacked
impl Unpin for Decoded
impl Unpin for FullDecoded
impl<'a> Unpin for Part<'a>
impl<'a> Unpin for Formatted<'a>
impl Unpin for Sign
Loading content...
Implementors
impl !Unpin for PhantomPinned
[src]
impl Unpin for Waker
[src]
impl<'a, T> Unpin for &'a T where
T: 'a + ?Sized,
[src]
T: 'a + ?Sized,
impl<'a, T> Unpin for &'a mut T where
T: 'a + ?Sized,
[src]
T: 'a + ?Sized,
impl<F> Unpin for PollFn<F>
[src]
impl<T> Unpin for Pending<T>
[src]
impl<T> Unpin for Ready<T>
[src]
impl<T> Unpin for *const T where
T: ?Sized,
[src]
T: ?Sized,
impl<T> Unpin for *mut T where
T: ?Sized,
[src]
T: ?Sized,
Auto implementors
impl Unpin for AllocErr
impl Unpin for AllocInit
impl Unpin for MemoryBlock
impl Unpin for ReallocPlacement
impl Unpin for Layout
impl Unpin for LayoutErr
impl Unpin for TypeId
impl Unpin for TryFromSliceError
impl Unpin for no_std_compat::ascii::EscapeDefault
impl Unpin for BorrowError
impl Unpin for BorrowMutError
impl Unpin for no_std_compat::char::EscapeUnicode
impl Unpin for no_std_compat::char::EscapeDefault
impl Unpin for no_std_compat::char::EscapeDebug
impl Unpin for ToLowercase
impl Unpin for ToUppercase
impl Unpin for CharTryFromError
impl Unpin for ParseCharError
impl Unpin for no_std_compat::cmp::Ordering
impl Unpin for Infallible
impl Unpin for c_void
impl Unpin for no_std_compat::fmt::Alignment
impl Unpin for Error
impl Unpin for SipHasher
impl Unpin for NonZeroUsize
impl Unpin for NonZeroIsize
impl Unpin for ParseFloatError
impl Unpin for FpCategory
impl Unpin for TryFromIntError
impl Unpin for ParseIntError
impl Unpin for IntErrorKind
impl Unpin for RangeFull
impl Unpin for NoneError
impl Unpin for SearchStep
impl Unpin for ParseBoolError
impl Unpin for AtomicBool
impl Unpin for no_std_compat::sync::atomic::Ordering
impl Unpin for AtomicIsize
impl Unpin for AtomicUsize
impl Unpin for RawWaker
impl Unpin for RawWakerVTable
impl Unpin for Duration
impl Unpin for isize
impl Unpin for usize
impl Unpin for bool
impl Unpin for char
impl Unpin for str
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 DecodeUtf16Error
impl Unpin for NonZeroI128
impl Unpin for NonZeroI16
impl Unpin for NonZeroI32
impl Unpin for NonZeroI64
impl Unpin for NonZeroI8
impl Unpin for NonZeroU128
impl Unpin for NonZeroU16
impl Unpin for NonZeroU32
impl Unpin for NonZeroU64
impl Unpin for NonZeroU8
impl Unpin for Utf8Lossy
impl Unpin for Utf8Error
impl Unpin for AtomicI16
impl Unpin for AtomicI32
impl Unpin for AtomicI64
impl Unpin for AtomicI8
impl Unpin for AtomicU16
impl Unpin for AtomicU32
impl Unpin for AtomicU64
impl Unpin for AtomicU8
impl Unpin for [u8]
impl Unpin for f32
impl Unpin for f64
impl Unpin for i8
impl Unpin for i16
impl Unpin for i32
impl Unpin for i64
impl Unpin for i128
impl Unpin for u8
impl Unpin for u16
impl Unpin for u32
impl Unpin for u64
impl Unpin for u128
impl<'a> Unpin for Formatter<'a>
impl<'a> Unpin for Arguments<'a>
impl<'a> Unpin for CharSearcher<'a>
impl<'a> Unpin for Chars<'a>
impl<'a> Unpin for CharIndices<'a>
impl<'a> Unpin for Bytes<'a>
impl<'a> Unpin for Lines<'a>
impl<'a> Unpin for LinesAny<'a>
impl<'a> Unpin for SplitWhitespace<'a>
impl<'a> Unpin for SplitAsciiWhitespace<'a>
impl<'a> Unpin for no_std_compat::str::EscapeDebug<'a>
impl<'a> Unpin for no_std_compat::str::EscapeDefault<'a>
impl<'a> Unpin for no_std_compat::str::EscapeUnicode<'a>
impl<'a> Unpin for Context<'a>
impl<'a> Unpin for Utf8LossyChunk<'a>
impl<'a> Unpin for Utf8LossyChunksIter<'a>
impl<'a> Unpin for EncodeUtf16<'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 no_std_compat::option::Iter<'a, A>
impl<'a, A> Unpin for no_std_compat::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 no_std_compat::str::RSplit<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for no_std_compat::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 no_std_compat::str::Split<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for no_std_compat::str::SplitInclusive<'a, P> where
<P as Pattern<'a>>::Searcher: Unpin,
<P as Pattern<'a>>::Searcher: Unpin,
impl<'a, P> Unpin for no_std_compat::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 no_std_compat::result::Iter<'a, T>
impl<'a, T> Unpin for no_std_compat::result::IterMut<'a, T>
impl<'a, T> Unpin for no_std_compat::slice::Iter<'a, T>
impl<'a, T> Unpin for no_std_compat::slice::IterMut<'a, T>
impl<'a, T> Unpin for Windows<'a, T>
impl<'a, T> Unpin for Chunks<'a, T>
impl<'a, T> Unpin for ChunksMut<'a, T>
impl<'a, T> Unpin for ChunksExact<'a, T>
impl<'a, T> Unpin for ChunksExactMut<'a, T>
impl<'a, T> Unpin for RChunks<'a, T>
impl<'a, T> Unpin for RChunksMut<'a, T>
impl<'a, T> Unpin for RChunksExact<'a, T>
impl<'a, T> Unpin for RChunksExactMut<'a, T>
impl<'a, T, P> Unpin for no_std_compat::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 no_std_compat::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 no_std_compat::slice::Split<'a, T, P> where
P: Unpin,
P: Unpin,
impl<'a, T, P> Unpin for no_std_compat::slice::SplitInclusive<'a, T, P> where
P: Unpin,
P: Unpin,
impl<'a, T, P> Unpin for SplitInclusiveMut<'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 no_std_compat::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 no_std_compat::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 MapWhile<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 AtomicPtr<T>
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> where
<T as DiscriminantKind>::Discriminant: Unpin,
<T as DiscriminantKind>::Discriminant: Unpin,
impl<T> Unpin for Wrapping<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for no_std_compat::result::IntoIter<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for MaybeUninit<T> where
T: Unpin,
T: Unpin,
impl<T> Unpin for [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 NonNull<T>
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<Y, R> Unpin for GeneratorState<Y, R> where
R: Unpin,
Y: Unpin,
R: Unpin,
Y: Unpin,
impl<const N: usize, T> Unpin for no_std_compat::array::IntoIter<T, N> where
T: Unpin,
T: Unpin,