Trait wasmer_types::lib::std::marker::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());

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

impl<F> Unpin for PollFn<F>

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

impl<T> Unpin for Pending<T>

impl Unpin for Waker

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

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

impl<T> Unpin for Ready<T>

impl Unpin for AlignedVec

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

impl Unpin for isize

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

impl Unpin for [u8]

impl Unpin for char

impl Unpin for u128

impl Unpin for u16

impl Unpin for i128

impl Unpin for i16

impl Unpin for str

impl Unpin for f64

impl Unpin for u64

impl Unpin for u8

impl Unpin for i64

impl Unpin for i8

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

impl Unpin for bool

impl Unpin for f32

impl Unpin for u32

impl Unpin for usize

impl Unpin for i32

Implementors

impl !Unpin for PhantomPinned

impl<Dyn> Unpin for wasmer_types::lib::std::ptr::DynMetadata<Dyn> where
    Dyn: ?Sized, 

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

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

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

Auto implementors

impl Unpin for ExportIndex

impl Unpin for ExternType

impl Unpin for GlobalInit

impl Unpin for ImportIndex

impl Unpin for Mutability

impl Unpin for Type

impl Unpin for wasmer_types::lib::std::cmp::Ordering

impl Unpin for Infallible

impl Unpin for wasmer_types::lib::std::fmt::Alignment

impl Unpin for wasmer_types::lib::std::sync::atomic::Ordering

impl Unpin for RecvTimeoutError

impl Unpin for TryRecvError

impl Unpin for Atomically

impl Unpin for Bytes

impl Unpin for CustomSectionIndex

impl Unpin for DataIndex

impl Unpin for DataInitializerLocation

impl Unpin for ElemIndex

impl Unpin for ExternRef

impl Unpin for Features

impl Unpin for FunctionIndex

impl Unpin for FunctionType

impl Unpin for GlobalIndex

impl Unpin for GlobalType

impl Unpin for LocalFunctionIndex

impl Unpin for LocalGlobalIndex

impl Unpin for LocalMemoryIndex

impl Unpin for LocalTableIndex

impl Unpin for MemoryIndex

impl Unpin for MemoryType

impl Unpin for OwnedDataInitializer

impl Unpin for PageCountOutOfRange

impl Unpin for Pages

impl Unpin for SignatureIndex

impl Unpin for TableIndex

impl Unpin for TableInitializer

impl Unpin for TableType

impl Unpin for V128

impl Unpin for VMExternRef

impl Unpin for TypeId

impl Unpin for BorrowError

impl Unpin for BorrowMutError

impl Unpin for Error

impl Unpin for SipHasher

impl Unpin for RangeFull

impl Unpin for FromUtf8Error

impl Unpin for FromUtf16Error

impl Unpin for String

impl Unpin for AtomicBool

impl Unpin for AtomicI8

impl Unpin for AtomicI16

impl Unpin for AtomicI32

impl Unpin for AtomicI64

impl Unpin for AtomicIsize

impl Unpin for AtomicU8

impl Unpin for AtomicU16

impl Unpin for AtomicU32

impl Unpin for AtomicU64

impl Unpin for AtomicUsize

impl Unpin for RecvError

impl Unpin for Barrier

impl Unpin for BarrierWaitResult

impl Unpin for Condvar

impl Unpin for wasmer_types::lib::std::sync::Once

impl Unpin for OnceState

impl Unpin for WaitTimeoutResult

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

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

impl<'a> Unpin for wasmer_types::lib::std::string::Drain<'a>

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

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

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

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

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

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

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

impl<'a, K, V> Unpin for wasmer_types::entity::Iter<'a, K, V> where
    K: Unpin, 

impl<'a, K, V> Unpin for wasmer_types::entity::IterMut<'a, K, V> where
    K: Unpin, 

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 wasmer_types::lib::std::slice::Iter<'a, T>

impl<'a, T> Unpin for wasmer_types::lib::std::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> Unpin for wasmer_types::lib::std::sync::mpsc::Iter<'a, T>

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

impl<'a, T, A> Unpin for MemoryView<'a, T, A> where
    A: Unpin, 

impl<'a, T, A> Unpin for wasmer_types::lib::std::vec::Drain<'a, T, A>

impl<'a, T, F, A> Unpin for DrainFilter<'a, T, F, A> where
    F: Unpin, 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

impl<'data> Unpin for DataInitializer<'data>

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

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

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

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

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

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

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

impl<H> Unpin for BuildHasherDefault<H> where
    H: Unpin, 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

impl<K> Unpin for Keys<K> where
    K: Unpin, 

impl<K, V> Unpin for BoxedSlice<K, V> where
    K: Unpin, 

impl<K, V> Unpin for PrimaryMap<K, V> where
    K: Unpin,
    V: Unpin, 

impl<K, V> Unpin for SecondaryMap<K, V> where
    K: Unpin,
    V: Unpin, 

impl<K, V> Unpin for ArchivableIndexMap<K, V> where
    K: Unpin,
    V: Unpin, 

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

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

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

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

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

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

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

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

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

impl<T> Unpin for wasmer_types::lib::std::iter::Once<T> where
    T: Unpin, 

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

impl<T> Unpin for Discriminant<T>

impl<T> Unpin for AtomicPtr<T>

impl<T> Unpin for wasmer_types::lib::std::sync::mpsc::IntoIter<T>

impl<T> Unpin for Receiver<T>

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

impl<T> Unpin for Sender<T>

impl<T> Unpin for SyncSender<T>

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

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

impl<T, A> Unpin for wasmer_types::lib::std::vec::IntoIter<T, A> where
    A: Unpin,
    T: Unpin, 

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

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

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

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

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

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

impl<T: ?Sized> Unpin for NonNull<T>

impl<T: ?Sized> Unpin for wasmer_types::lib::std::rc::Weak<T>

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

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

impl<T: ?Sized> Unpin for wasmer_types::lib::std::sync::Weak<T>

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

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