Trait cron::lib::std::prelude::v1::v1::Unpin

#[lang = "unpin"]pub auto trait 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 Error

impl Unpin for ErrorKind

impl<T> Unpin for Pending<T>

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

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

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

impl !Unpin for PhantomPinned

impl<T> Unpin for Ready<T>

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

impl Unpin for Waker

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

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

impl Unpin for isize

impl Unpin for i8

impl Unpin for i16

impl Unpin for i32

impl Unpin for i64

impl Unpin for i128

impl Unpin for usize

impl Unpin for u8

impl Unpin for u16

impl Unpin for u32

impl Unpin for u64

impl Unpin for u128

impl Unpin for f32

impl Unpin for f64

impl Unpin for bool

impl Unpin for char

impl Unpin for str

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

impl Unpin for [u8]

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Implementors

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

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Auto implementors

impl Unpin for Weekday

impl Unpin for Local

impl Unpin for Utc

impl Unpin for FixedOffset

impl Unpin for NaiveDate

impl Unpin for NaiveTime

impl Unpin for NaiveDateTime

impl Unpin for SecondsFormat

impl Unpin for IsoWeek

impl Unpin for Pad

impl Unpin for Numeric

impl Unpin for InternalNumeric

impl Unpin for Fixed

impl Unpin for InternalFixed

impl Unpin for ParseError

impl Unpin for Parsed

impl Unpin for ParseWeekdayError

impl Unpin for Duration

impl Unpin for String

impl Unpin for Ordering

impl Unpin for RandomState

impl Unpin for DefaultHasher

impl Unpin for TryReserveError

impl Unpin for Infallible

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

impl Unpin for cron::lib::std::fmt::Error

impl Unpin for SipHasher

impl Unpin for RangeFull

impl Unpin for NoneError

impl Unpin for SearchStep

impl Unpin for ParseBoolError

impl Unpin for Needed

impl Unpin for CompareResult

impl Unpin for Endianness

impl Unpin for cron::example_generated::inner::Error

impl Unpin for cron::example_generated::inner::ErrorKind

impl Unpin for cron::example_generated::Error

impl Unpin for cron::example_generated::ErrorKind

impl Unpin for Backtrace

impl Unpin for cron::error::Error

impl Unpin for cron::error::ErrorKind

impl Unpin for Schedule

impl Unpin for Field

impl Unpin for Specifier

impl Unpin for DaysOfMonth

impl Unpin for DaysOfWeek

impl Unpin for Hours

impl Unpin for Minutes

impl Unpin for Months

impl Unpin for Seconds

impl Unpin for Years

impl Unpin for Utf8Error

impl Unpin for FromUtf16Error

impl Unpin for FromUtf8Error

impl<'a> Unpin for Item<'a>

impl<'a> Unpin for StrftimeItems<'a>

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

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

impl<'a> Unpin for CharSearcher<'a>

impl<'a> Unpin for SplitAsciiWhitespace<'a>

impl<'a> Unpin for SplitWhitespace<'a>

impl<'a> Unpin for Bytes<'a>

impl<'a> Unpin for CharIndices<'a>

impl<'a> Unpin for Chars<'a>

impl<'a> Unpin for EscapeDebug<'a>

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

impl<'a> Unpin for EscapeUnicode<'a>

impl<'a> Unpin for Lines<'a>

impl<'a> Unpin for LinesAny<'a>

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

impl<'a> Unpin for CompleteStr<'a>

impl<'a> Unpin for CompleteByteSlice<'a>

impl<'a> Unpin for ErrorChainIter<'a>

impl<'a> Unpin for OrdinalIter<'a>

impl<'a> Unpin for OrdinalRangeIter<'a>

impl<'a> Unpin for EncodeUtf16<'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> Unpin for CharSliceSearcher<'a, 'b>

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

impl<'a, A> Unpin for cron::lib::std::option::Iter<'a, A>

impl<'a, A> Unpin for cron::lib::std::option::IterMut<'a, A>

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

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

impl<'a, K> Unpin for cron::lib::std::collections::hash_set::Iter<'a, K>

impl<'a, K> Unpin for cron::lib::std::collections::hash_set::Drain<'a, K> where
    K: Unpin, 

impl<'a, K, V> Unpin for cron::lib::std::collections::hash_map::Iter<'a, K, V>

impl<'a, K, V> Unpin for cron::lib::std::collections::hash_map::IterMut<'a, K, V>

impl<'a, K, V> Unpin for cron::lib::std::collections::hash_map::Keys<'a, K, V>

impl<'a, K, V> Unpin for cron::lib::std::collections::hash_map::Values<'a, K, V>

impl<'a, K, V> Unpin for cron::lib::std::collections::hash_map::ValuesMut<'a, K, V>

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

impl<'a, K, V> Unpin for cron::lib::std::collections::btree_map::Iter<'a, K, V>

impl<'a, K, V> Unpin for cron::lib::std::collections::btree_map::Keys<'a, K, V>

impl<'a, K, V> Unpin for cron::lib::std::collections::btree_map::Values<'a, K, V>

impl<'a, K, V> Unpin for cron::lib::std::collections::btree_map::Range<'a, K, V>

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

impl<'a, K, V> Unpin for cron::lib::std::collections::btree_map::OccupiedEntry<'a, K, V>

impl<'a, K, V> Unpin for cron::lib::std::collections::btree_map::IterMut<'a, K, V>

impl<'a, K, V> Unpin for cron::lib::std::collections::btree_map::ValuesMut<'a, K, V>

impl<'a, K, V> Unpin for cron::lib::std::collections::btree_map::Entry<'a, K, V> where
    K: Unpin, 

impl<'a, K, V> Unpin for cron::lib::std::collections::hash_map::Entry<'a, K, V> where
    K: Unpin, 

impl<'a, K, V> Unpin for cron::lib::std::collections::btree_map::VacantEntry<'a, K, V> where
    K: Unpin, 

impl<'a, K, V> Unpin for cron::lib::std::collections::hash_map::Drain<'a, K, V> where
    K: Unpin,
    V: Unpin, 

impl<'a, K, V> Unpin for cron::lib::std::collections::hash_map::OccupiedEntry<'a, K, V> where
    K: Unpin, 

impl<'a, K, V> Unpin for cron::lib::std::collections::hash_map::VacantEntry<'a, K, V> where
    K: Unpin, 

impl<'a, K, V, F> Unpin for cron::lib::std::collections::btree_map::DrainFilter<'a, K, V, F> where
    F: Unpin, 

impl<'a, K, V, S> Unpin for RawEntryBuilderMut<'a, K, V, S>

impl<'a, K, V, S> Unpin for RawEntryMut<'a, K, V, S>

impl<'a, K, V, S> Unpin for RawVacantEntryMut<'a, K, V, S>

impl<'a, K, V, S> Unpin for RawEntryBuilder<'a, K, V, S>

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

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

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

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

impl<'a, P> Unpin for cron::lib::std::str::RSplit<'a, P> where
    <P as Pattern<'a>>::Searcher: Unpin, 

impl<'a, P> Unpin for cron::lib::std::str::RSplitN<'a, P> where
    <P as Pattern<'a>>::Searcher: Unpin, 

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

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

impl<'a, P> Unpin for cron::lib::std::str::SplitN<'a, P> where
    <P as Pattern<'a>>::Searcher: Unpin, 

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

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

impl<'a, T> Unpin for cron::lib::std::collections::binary_heap::Iter<'a, T>

impl<'a, T> Unpin for cron::lib::std::collections::binary_heap::Drain<'a, T>

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

impl<'a, T> Unpin for cron::lib::std::collections::btree_set::Iter<'a, T>

impl<'a, T> Unpin for cron::lib::std::collections::btree_set::Difference<'a, T>

impl<'a, T> Unpin for cron::lib::std::collections::btree_set::SymmetricDifference<'a, T>

impl<'a, T> Unpin for cron::lib::std::collections::btree_set::Intersection<'a, T>

impl<'a, T> Unpin for cron::lib::std::collections::btree_set::Union<'a, T>

impl<'a, T> Unpin for cron::lib::std::collections::btree_set::Range<'a, T>

impl<'a, T> Unpin for cron::lib::std::collections::linked_list::Iter<'a, T>

impl<'a, T> Unpin for cron::lib::std::collections::linked_list::IterMut<'a, T>

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

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

impl<'a, T> Unpin for cron::lib::std::collections::vec_deque::Iter<'a, T>

impl<'a, T> Unpin for cron::lib::std::collections::vec_deque::IterMut<'a, T>

impl<'a, T> Unpin for cron::lib::std::collections::vec_deque::Drain<'a, T>

impl<'a, T> Unpin for cron::lib::std::result::Iter<'a, T>

impl<'a, T> Unpin for cron::lib::std::result::IterMut<'a, T>

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

impl<'a, T> Unpin for Windows<'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 cron::lib::std::slice::Iter<'a, T>

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

impl<'a, T, F> Unpin for cron::lib::std::collections::btree_set::DrainFilter<'a, T, F> where
    F: Unpin, 

impl<'a, T, F> Unpin for cron::lib::std::collections::linked_list::DrainFilter<'a, T, F> where
    F: Unpin, 

impl<'a, T, F> Unpin for cron::lib::std::vec::DrainFilter<'a, T, F> where
    F: Unpin, 

impl<'a, T, P> Unpin for cron::lib::std::slice::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 cron::lib::std::slice::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 cron::lib::std::slice::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 cron::lib::std::slice::SplitN<'a, T, P> where
    P: Unpin, 

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

impl<'a, T, S> Unpin for cron::lib::std::collections::hash_set::Intersection<'a, T, S>

impl<'a, T, S> Unpin for cron::lib::std::collections::hash_set::Difference<'a, T, S>

impl<'a, T, S> Unpin for cron::lib::std::collections::hash_set::SymmetricDifference<'a, T, S>

impl<'a, T, S> Unpin for cron::lib::std::collections::hash_set::Union<'a, T, S>

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

impl<'a, Z> Unpin for ScheduleIterator<'a, Z> where
    <Z as TimeZone>::Offset: Unpin, 

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

impl<A> Unpin for cron::lib::std::option::IntoIter<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<E> Unpin for cron::ErrorKind<E> where
    E: 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 DelayedFormat<I> where
    I: 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 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, E> Unpin for Context<I, E> where
    E: Unpin,
    I: Unpin, 

impl<I, E> Unpin for Err<I, E> where
    E: Unpin,
    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, 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 cron::lib::std::ops::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 cron::lib::std::collections::hash_set::IntoIter<K> where
    K: Unpin, 

impl<K, V> Unpin for cron::lib::std::collections::btree_map::IntoIter<K, V>

impl<K, V> Unpin for cron::lib::std::collections::hash_map::IntoIter<K, V> where
    K: Unpin,
    V: Unpin, 

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

impl<K, V, S> Unpin for HashMap<K, V, S> where
    K: Unpin,
    S: Unpin,
    V: Unpin, 

impl<T> Unpin for cron::lib::std::collections::btree_set::IntoIter<T>

impl<T> Unpin for LinkedList<T>

impl<T> Unpin for cron::lib::std::collections::linked_list::IntoIter<T>

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

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

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

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

impl<T> Unpin for cron::lib::std::collections::binary_heap::IntoIter<T> where
    T: Unpin, 

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

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

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

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

impl<T> Unpin for cron::lib::std::collections::vec_deque::IntoIter<T> where
    T: Unpin, 

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

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

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

impl<T> Unpin for Discriminant<T> where
    <T as DiscriminantKind>::Discriminant: Unpin, 

impl<T> Unpin for cron::lib::std::result::IntoIter<T> where
    T: Unpin, 

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

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

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

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

impl<T, E> Unpin for Result<T, E> where
    E: Unpin,
    T: Unpin, 

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

impl<T, S> Unpin for HashSet<T, S> where
    S: Unpin,
    T: Unpin, 

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

impl<Tz> Unpin for Date<Tz> where
    <Tz as TimeZone>::Offset: Unpin, 

impl<Tz> Unpin for DateTime<Tz> where
    <Tz as TimeZone>::Offset: Unpin, 

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

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