Trait sp_std::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());

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<Dyn> Unpin for DynMetadata<Dyn>
where Dyn: ?Sized,

1.64.0 · source§

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

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impl<I> Unpin for FromIter<I>

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

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

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

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impl<T> Unpin for &mut T
where T: ?Sized,

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impl<T> Unpin for Ready<T>

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impl<T, A> Unpin for Box<T, A>
where A: Allocator + 'static, T: ?Sized,

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impl<T, A> Unpin for Rc<T, A>
where A: Allocator, T: ?Sized,

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impl<T, A> Unpin for Arc<T, A>
where A: Allocator, T: ?Sized,

Auto implementors§

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impl Unpin for sp_std::cmp::Ordering

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impl Unpin for Infallible

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impl Unpin for sp_std::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 SearchStep

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impl Unpin for sp_std::sync::atomic::Ordering

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impl Unpin for RecvTimeoutError

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impl Unpin for TryRecvError

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impl Unpin for AllocError

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impl Unpin for Global

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impl Unpin for Layout

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impl Unpin for LayoutError

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impl Unpin for System

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impl Unpin for TypeId

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impl Unpin for BorrowError

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impl Unpin for BorrowMutError

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impl Unpin for Error

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impl Unpin for DefaultHasher

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impl Unpin for RandomState

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impl Unpin for SipHasher

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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 sp_std::ptr::Alignment

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impl Unpin for ParseBoolError

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impl Unpin for Utf8Error

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impl Unpin for Writer

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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 RecvError

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impl Unpin for Barrier

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impl Unpin for BarrierWaitResult

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impl Unpin for Condvar

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impl Unpin for sp_std::sync::Once

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impl Unpin for OnceState

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impl Unpin for WaitTimeoutResult

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impl Unpin for Duration

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impl Unpin for TryFromFloatSecsError

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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 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 EscapeDebug<'a>

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impl<'a> Unpin for EscapeDefault<'a>

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

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

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

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

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

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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, B: ?Sized> Unpin for Cow<'a, B>
where <B as ToOwned>::Owned: Unpin,

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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, I, A> Unpin for Splice<'a, I, A>
where I: Unpin,

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impl<'a, K, V> Unpin for Cursor<'a, K, V>

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impl<'a, K, V> Unpin for sp_std::collections::btree_map::Iter<'a, K, V>

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impl<'a, K, V> Unpin for sp_std::collections::btree_map::IterMut<'a, K, V>

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impl<'a, K, V> Unpin for Keys<'a, K, V>

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impl<'a, K, V> Unpin for sp_std::collections::btree_map::Range<'a, K, V>

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impl<'a, K, V> Unpin for RangeMut<'a, K, V>

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impl<'a, K, V> Unpin for Values<'a, K, V>

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impl<'a, K, V> Unpin for ValuesMut<'a, K, V>

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impl<'a, K, V, A> Unpin for Entry<'a, K, V, A>
where A: Unpin, K: Unpin,

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impl<'a, K, V, A> Unpin for CursorMut<'a, K, V, A>

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impl<'a, K, V, A> Unpin for OccupiedEntry<'a, K, V, A>
where A: Unpin,

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impl<'a, K, V, A> Unpin for OccupiedError<'a, K, V, A>
where A: Unpin, V: Unpin,

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impl<'a, K, V, A> Unpin for VacantEntry<'a, K, V, A>
where A: Unpin, K: Unpin,

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impl<'a, K, V, F, A> Unpin for sp_std::collections::btree_map::ExtractIf<'a, K, V, F, A>
where A: Unpin, F: Unpin,

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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 sp_std::str::RSplit<'a, P>
where <P as Pattern<'a>>::Searcher: Unpin,

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

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

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impl<'a, P> Unpin for sp_std::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 sp_std::collections::btree_set::Iter<'a, T>

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impl<'a, T> Unpin for sp_std::collections::btree_set::Range<'a, T>

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

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

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impl<'a, T> Unpin for sp_std::collections::vec_deque::Iter<'a, T>

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impl<'a, T> Unpin for sp_std::collections::vec_deque::IterMut<'a, T>

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

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

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impl<'a, T> Unpin for sp_std::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> Unpin for sp_std::sync::mpsc::Iter<'a, T>

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

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impl<'a, T, A> Unpin for Difference<'a, T, A>

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impl<'a, T, A> Unpin for Intersection<'a, T, A>

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impl<'a, T, A> Unpin for sp_std::collections::vec_deque::Drain<'a, T, A>

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impl<'a, T, A> Unpin for sp_std::vec::Drain<'a, T, A>

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impl<'a, T, F, A> Unpin for sp_std::collections::btree_set::ExtractIf<'a, T, F, A>
where A: Unpin, F: Unpin,

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impl<'a, T, F, A> Unpin for sp_std::vec::ExtractIf<'a, T, F, A>
where F: Unpin,

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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 sp_std::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 sp_std::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 sp_std::slice::Split<'a, T, P>
where P: Unpin,

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impl<'a, T, P> Unpin for sp_std::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 sp_std::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 sp_std::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, T: ?Sized> Unpin for MutexGuard<'a, T>

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

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

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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<A> Unpin for Repeat<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 FormatterFn<F>
where F: 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 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, F, const N: usize> Unpin for MapWindows<I, F, N>
where F: Unpin, I: Unpin, <I as Iterator>::Item: 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 sp_std::iter::ArrayChunks<I, N>
where I: Unpin, <I as Iterator>::Item: Unpin,

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impl<Idx> Unpin for sp_std::ops::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<K, V, A> Unpin for BTreeMap<K, V, A>
where A: Unpin,

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impl<K, V, A> Unpin for sp_std::collections::btree_map::IntoIter<K, V, A>
where A: Unpin,

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impl<K, V, A> Unpin for IntoKeys<K, V, A>
where A: Unpin,

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impl<K, V, A> Unpin for IntoValues<K, V, A>
where A: Unpin,

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

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

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impl<T> Unpin for TrySendError<T>
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 Empty<T>

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impl<T> Unpin for sp_std::iter::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 UniqueRc<T>
where T: Unpin,

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

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impl<T> Unpin for AtomicPtr<T>

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impl<T> Unpin for sp_std::sync::mpsc::IntoIter<T>

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impl<T> Unpin for Receiver<T>

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

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impl<T> Unpin for Sender<T>

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impl<T> Unpin for SyncSender<T>

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

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

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

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impl<T, A> Unpin for BTreeSet<T, A>
where A: Unpin,

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impl<T, A> Unpin for sp_std::collections::btree_set::IntoIter<T, A>
where A: Unpin,

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impl<T, A> Unpin for sp_std::collections::vec_deque::IntoIter<T, A>
where A: Unpin, T: Unpin,

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impl<T, A> Unpin for VecDeque<T, A>
where A: Unpin, T: Unpin,

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impl<T, A> Unpin for sp_std::vec::IntoIter<T, A>
where A: Unpin, T: Unpin,

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impl<T, A> Unpin for Vec<T, A>
where A: Unpin, 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, F> Unpin for LazyLock<T, F>
where F: Unpin, T: Unpin,

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impl<T: ?Sized> Unpin for ThinBox<T>
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 Mutex<T>
where T: Unpin,

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

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

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impl<T: ?Sized, A> Unpin for sp_std::rc::Weak<T, A>
where A: Unpin,

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impl<T: ?Sized, A> Unpin for sp_std::sync::Weak<T, A>
where A: Unpin,

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