# Trait std::marker::Send 1.0.0 [−] [src]

    pub unsafe auto trait Send { }

Types that can be transferred across thread boundaries.

This trait is automatically implemented when the compiler determines it's appropriate.

An example of a non-`Send` type is the reference-counting pointer `rc::Rc`. If two threads attempt to clone `Rc`s that point to the same reference-counted value, they might try to update the reference count at the same time, which is undefined behavior because `Rc` doesn't use atomic operations. Its cousin `sync::Arc` does use atomic operations (incurring some overhead) and thus is `Send`.

See the Nomicon for more details.

## Implementations on Foreign Types

### `impl Send for Argument`

### `impl Send for FormatSpec`

### `impl Send for Alignment`

### `impl Send for Count`

### `impl Send for Position`

## Implementors

- [src]
  `impl<'a, T> Send for std::slice::IterMut<'a, T> where
  T: Send,`
- [src]
  `impl<T> !Send for *const T where
  T: ?Sized,`
- [src]
  `impl<'a, T> Send for &'a T where
  T: Sync + ?Sized,`
- [src]
  `impl<'a, T> Send for std::slice::Iter<'a, T> where
  T: Sync,`
- [src]
  `impl<T> Send for Cell<T> where
  T: Send,`
- [src]
  `impl<T> Send for Unique<T> where
  T: Send + ?Sized,`
- [src]
  `impl<T> Send for AtomicPtr<T>`
- [src]
  `impl<T> !Send for *mut T where
  T: ?Sized,`
- [src]
  `impl<'a, T> Send for &'a mut T where
  T: Send + ?Sized,`
- [src]
  `impl<T> !Send for NonNull<T> where
  T: ?Sized,`
- [src]
  `impl<T> Send for RefCell<T> where
  T: Send + ?Sized,`
- [src]
  `impl<T> Send for LinkedList<T> where
  T: Send,`
- [src]
  `impl<T> Send for std::sync::Weak<T> where
  T: Send + Sync + ?Sized,`
- [src]
  `impl<T> !Send for std::rc::Weak<T> where
  T: ?Sized,`
- [src]
  `impl<'a, T> Send for std::collections::linked_list::IterMut<'a, T> where
  T: Send,`
- [src]
  `impl<'a, T> Send for std::vec::Drain<'a, T> where
  T: Send,`
- [src]
  `impl<T> Send for std::vec::IntoIter<T> where
  T: Send,`
- [src]
  `impl<T> Send for Arc<T> where
  T: Send + Sync + ?Sized,`
- [src]
  `impl<'a> Send for std::string::Drain<'a>`
- [src]
  `impl<'a, T> Send for std::collections::vec_deque::Drain<'a, T> where
  T: Send,`
- [src]
  `impl<T> !Send for Rc<T> where
  T: ?Sized,`
- [src]
  `impl<'a, T> Send for std::collections::linked_list::Iter<'a, T> where
  T: Sync,`
- [src]
  `impl !Send for Args`
- [src]
  `impl !Send for ArgsOs`
- [src]
  `impl !Send for Select`
- [src]
  `impl<T: Send> Send for Receiver<T>`
- [src]
  `impl<T: Send> Send for Sender<T>`
- [src]
  `impl<T: Send> Send for SyncSender<T>`
- [src]
  `impl<T: ?Sized + Send> Send for Mutex<T>`
- [src]
  `impl<'a, T: ?Sized> !Send for MutexGuard<'a, T>`
- [src]
  `impl Send for std::sync::Once`
- [src]
  `impl<T: ?Sized + Send> Send for RwLock<T>`
- [src]
  `impl<'a, T: ?Sized> !Send for RwLockReadGuard<'a, T>`
- [src]
  `impl<'a, T: ?Sized> !Send for RwLockWriteGuard<'a, T>`

## Auto implementors

- `impl Send for TypeId`
- `impl Send for BorrowError`
- `impl Send for BorrowMutError`
- `impl<'b, T> !Send for Ref<'b, T>`
- `impl<'b, T> !Send for RefMut<'b, T>`
- `impl<T: ?Sized> Send for UnsafeCell<T> where
  T: Send,`
- `impl Send for std::cmp::Ordering`
- `impl<T> Send for Reverse<T> where
  T: Send,`
- `impl Send for Infallible`
- `impl<H> Send for BuildHasherDefault<H> where
  H: Send,`
- `impl Send for SipHasher`
- `impl Send for SipHasher24`
- `impl Send for SipHasher13`
- `impl<T> Send for Rev<T> where
  T: Send,`
- `impl<I> Send for Cloned<I> where
  I: Send,`
- `impl<I> Send for Cycle<I> where
  I: Send,`
- `impl<I> Send for StepBy<I> where
  I: Send,`
- `impl<A, B> Send for std::iter::Chain<A, B> where
  A: Send,
  B: Send,`
- `impl<A, B> Send for Zip<A, B> where
  A: Send,
  B: Send,`
- `impl<I, F> Send for Map<I, F> where
  F: Send,
  I: Send,`
- `impl<I, P> Send for Filter<I, P> where
  I: Send,
  P: Send,`
- `impl<I, F> Send for FilterMap<I, F> where
  F: Send,
  I: Send,`
- `impl<I> Send for Enumerate<I> where
  I: Send,`
- `impl<I> Send for Peekable<I> where
  I: Send,
  <I as Iterator>::Item: Send,`
- `impl<I, P> Send for SkipWhile<I, P> where
  I: Send,
  P: Send,`
- `impl<I, P> Send for TakeWhile<I, P> where
  I: Send,
  P: Send,`
- `impl<I> Send for Skip<I> where
  I: Send,`
- `impl<I> Send for std::iter::Take<I> where
  I: Send,`
- `impl<I, St, F> Send for Scan<I, St, F> where
  F: Send,
  I: Send,
  St: Send,`
- `impl<I, U, F> Send for FlatMap<I, U, F> where
  F: Send,
  I: Send,
  <U as IntoIterator>::IntoIter: Send,`
- `impl<I> Send for Flatten<I> where
  I: Send,
  <<I as Iterator>::Item as IntoIterator>::IntoIter: Send,`
- `impl<I> Send for Fuse<I> where
  I: Send,`
- `impl<I, F> Send for Inspect<I, F> where
  F: Send,
  I: Send,`
- `impl<T> Send for std::iter::Empty<T> where
  T: Send,`
- `impl<A> Send for std::iter::Repeat<A> where
  A: Send,`
- `impl<F> Send for RepeatWith<F> where
  F: Send,`
- `impl<T> Send for std::iter::Once<T> where
  T: Send,`
- `impl<T: ?Sized> Send for PhantomData<T> where
  T: Send,`
- `impl<T> Send for Discriminant<T>`
- `impl<T> Send for ManuallyDrop<T> where
  T: Send,`
- `impl<Idx> Send for std::ops::Range<Idx> where
  Idx: Send,`
- `impl<Idx> Send for RangeToInclusive<Idx> where
  Idx: Send,`
- `impl<Y, R> Send for GeneratorState<Y, R> where
  R: Send,
  Y: Send,`
- `impl<Idx> Send for RangeTo<Idx> where
  Idx: Send,`
- `impl<Idx> Send for RangeInclusive<Idx> where
  Idx: Send,`
- `impl Send for RangeFull`
- `impl<Idx> Send for RangeFrom<Idx> where
  Idx: Send,`
- `impl !Send for TraitObject`
- `impl<T, E> Send for Result<T, E> where
  E: Send,
  T: Send,`
- `impl<'a, T> Send for std::result::Iter<'a, T> where
  T: Sync,`
- `impl<'a, T> Send for std::result::IterMut<'a, T> where
  T: Send,`
- `impl<T> Send for std::result::IntoIter<T> where
  T: Send,`
- `impl<T> Send for Option<T> where
  T: Send,`
- `impl<'a, A> Send for std::option::Iter<'a, A> where
  A: Sync,`
- `impl<'a, A> Send for std::option::IterMut<'a, A> where
  A: Send,`
- `impl<A> Send for std::option::IntoIter<A> where
  A: Send,`
- `impl Send for NoneError`
- `impl Send for ExchangeHeapSingleton`
- `impl<T: ?Sized> Send for Box<T> where
  T: Send,`
- `impl<T> !Send for IntermediateBox<T>`
- `impl<'a, B: ?Sized> Send for Cow<'a, B> where
  B: Sync,
  <B as ToOwned>::Owned: Send,`
- `impl<'a> !Send for Formatter<'a>`
- `impl<'a, 'b> !Send for DebugList<'a, 'b>`
- `impl<'a, 'b> !Send for DebugTuple<'a, 'b>`
- `impl<'a, 'b> !Send for DebugSet<'a, 'b>`
- `impl Send for std::fmt::Error`
- `impl<'a, 'b> !Send for DebugMap<'a, 'b>`
- `impl<'a> !Send for Arguments<'a>`
- `impl<'a, 'b> !Send for DebugStruct<'a, 'b>`
- `impl<'a, T> Send for Windows<'a, T> where
  T: Sync,`
- `impl<'a, T, P> Send for RSplitMut<'a, T, P> where
  P: Send,
  T: Send,`
- `impl<'a, T> Send for ExactChunksMut<'a, T> where
  T: Send,`
- `impl<'a, T, P> Send for std::slice::RSplitN<'a, T, P> where
  P: Send,
  T: Sync,`
- `impl<'a, T, P> Send for std::slice::RSplit<'a, T, P> where
  P: Send,
  T: Sync,`
- `impl<'a, T> Send for ExactChunks<'a, T> where
  T: Sync,`
- `impl<'a, T> Send for Chunks<'a, T> where
  T: Sync,`
- `impl<'a, T, P> Send for std::slice::SplitN<'a, T, P> where
  P: Send,
  T: Sync,`
- `impl<'a, T, P> Send for std::slice::Split<'a, T, P> where
  P: Send,
  T: Sync,`
- `impl<'a, T> Send for ChunksMut<'a, T> where
  T: Send,`
- `impl<'a, T, P> Send for RSplitNMut<'a, T, P> where
  P: Send,
  T: Send,`
- `impl<'a, T, P> Send for SplitMut<'a, T, P> where
  P: Send,
  T: Send,`
- `impl<'a, T, P> Send for SplitNMut<'a, T, P> where
  P: Send,
  T: Send,`
- `impl<'a> Send for EncodeUtf16<'a>`
- `impl Send for SearchStep`
- `impl<'a> Send for CharSearcher<'a>`
- `impl<'a, 'b> Send for CharSliceSearcher<'a, 'b>`
- `impl<'a, F> Send for CharPredicateSearcher<'a, F> where
  F: Send,`
- `impl<'a, 'b> Send for StrSearcher<'a, 'b>`
- `impl<'a> Send for LinesAny<'a>`
- `impl<'a, P> Send for RMatches<'a, P> where
  <P as Pattern<'a>>::Searcher: Send,`
- `impl<'a, P> Send for std::str::RSplitN<'a, P> where
  <P as Pattern<'a>>::Searcher: Send,`
- `impl<'a, P> Send for std::str::RSplit<'a, P> where
  <P as Pattern<'a>>::Searcher: Send,`
- `impl<'a> Send for SplitWhitespace<'a>`
- `impl<'a, P> Send for std::str::SplitN<'a, P> where
  <P as Pattern<'a>>::Searcher: Send,`
- `impl<'a> Send for std::str::Lines<'a>`
- `impl<'a, P> Send for Matches<'a, P> where
  <P as Pattern<'a>>::Searcher: Send,`
- `impl Send for ParseBoolError`
- `impl<'a> Send for std::str::Bytes<'a>`
- `impl Send for Utf8Error`
- `impl<'a, P> Send for std::str::Split<'a, P> where
  <P as Pattern<'a>>::Searcher: Send,`
- `impl<'a> Send for CharIndices<'a>`
- `impl<'a, P> Send for RSplitTerminator<'a, P> where
  <P as Pattern<'a>>::Searcher: Send,`
- `impl<'a> Send for std::str::Chars<'a>`
- `impl<'a, P> Send for RMatchIndices<'a, P> where
  <P as Pattern<'a>>::Searcher: Send,`
- `impl<'a, P> Send for SplitTerminator<'a, P> where
  <P as Pattern<'a>>::Searcher: Send,`
- `impl<'a, P> Send for MatchIndices<'a, P> where
  <P as Pattern<'a>>::Searcher: Send,`
- `impl Send for String`
- `impl Send for FromUtf8Error`
- `impl Send for FromUtf16Error`
- `impl Send for ParseError`
- `impl<T> Send for Vec<T> where
  T: Send,`
- `impl<'a, T> Send for std::vec::PlaceBack<'a, T> where
  T: Send,`
- `impl<'a, I> Send for Splice<'a, I> where
  I: Send,
  <I as Iterator>::Item: Send,`
- `impl<'a, T, F> Send for std::vec::DrainFilter<'a, T, F> where
  F: Send,
  T: Send,`
- `impl Send for ToLowercase`
- `impl Send for ToUppercase`
- `impl<I> Send for DecodeUtf16<I> where
  I: Send,`
- `impl Send for DecodeUtf16Error`
- `impl<I> Send for DecodeUtf8<I> where
  I: Send,`
- `impl Send for std::char::EscapeDefault`
- `impl Send for ParseCharError`
- `impl Send for EscapeDebug`
- `impl Send for CharTryFromError`
- `impl Send for EscapeUnicode`
- `impl Send for UnicodeVersion`
- `impl<T> Send for LocalKey<T>`
- `impl Send for AccessError`
- `impl Send for Builder`
- `impl Send for ThreadId`
- `impl Send for Thread`
- `impl<T> Send for JoinHandle<T> where
  T: Send,`
- `impl Send for LocalKeyState`
- `impl Send for std::ascii::EscapeDefault`
- `impl<T> Send for Bound<T> where
  T: Send,`
- `impl<T> Send for BinaryHeap<T> where
  T: Send,`
- `impl<K, V> Send for BTreeMap<K, V> where
  K: Send,
  V: Send,`
- `impl<T> Send for BTreeSet<T> where
  T: Send,`
- `impl<T> Send for VecDeque<T> where
  T: Send,`
- `impl<'a, T> Send for PeekMut<'a, T> where
  T: Send,`
- `impl<'a, T> Send for std::collections::binary_heap::Iter<'a, T> where
  T: Sync,`
- `impl<T> Send for std::collections::binary_heap::IntoIter<T> where
  T: Send,`
- `impl<'a, T> Send for std::collections::binary_heap::Drain<'a, T> where
  T: Send,`
- `impl<'a, T> !Send for BinaryHeapPlace<'a, T>`
- `impl<'a, K, V> Send for std::collections::btree_map::ValuesMut<'a, K, V> where
  K: Send,
  V: Send,`
- `impl<'a, K, V> Send for std::collections::btree_map::Values<'a, K, V> where
  K: Sync,
  V: Sync,`
- `impl<'a, K, V> Send for std::collections::btree_map::OccupiedEntry<'a, K, V> where
  K: Send,
  V: Send,`
- `impl<'a, K, V> Send for RangeMut<'a, K, V> where
  K: Send,
  V: Send,`
- `impl<'a, K, V> Send for std::collections::btree_map::Keys<'a, K, V> where
  K: Sync,
  V: Sync,`
- `impl<'a, K, V> Send for std::collections::btree_map::Iter<'a, K, V> where
  K: Sync,
  V: Sync,`
- `impl<K, V> Send for std::collections::btree_map::IntoIter<K, V> where
  K: Send,
  V: Send,`
- `impl<'a, K, V> Send for std::collections::btree_map::Range<'a, K, V> where
  K: Sync,
  V: Sync,`
- `impl<'a, K, V> Send for std::collections::btree_map::VacantEntry<'a, K, V> where
  K: Send,
  V: Send,`
- `impl<'a, K, V> Send for std::collections::btree_map::Entry<'a, K, V> where
  K: Send,
  V: Send,`
- `impl<'a, K, V> Send for std::collections::btree_map::IterMut<'a, K, V> where
  K: Send,
  V: Send,`
- `impl<'a, T> Send for std::collections::btree_set::SymmetricDifference<'a, T> where
  T: Sync,`
- `impl<'a, T> Send for std::collections::btree_set::Iter<'a, T> where
  T: Sync,`
- `impl<'a, T> Send for std::collections::btree_set::Intersection<'a, T> where
  T: Sync,`
- `impl<T> Send for std::collections::btree_set::IntoIter<T> where
  T: Send,`
- `impl<'a, T> Send for std::collections::btree_set::Range<'a, T> where
  T: Sync,`
- `impl<'a, T> Send for std::collections::btree_set::Difference<'a, T> where
  T: Sync,`
- `impl<'a, T> Send for std::collections::btree_set::Union<'a, T> where
  T: Sync,`
- `impl<T> Send for std::collections::linked_list::IntoIter<T> where
  T: Send,`
- `impl<'a, T, F> !Send for std::collections::linked_list::DrainFilter<'a, T, F>`
- `impl<'a, T> !Send for FrontPlace<'a, T>`
- `impl<'a, T> !Send for BackPlace<'a, T>`
- `impl<'a, T> Send for std::collections::vec_deque::Iter<'a, T> where
  T: Sync,`
- `impl<'a, T> Send for std::collections::vec_deque::IterMut<'a, T> where
  T: Send,`
- `impl<T> Send for std::collections::vec_deque::IntoIter<T> where
  T: Send,`
- `impl<'a, T> Send for std::collections::vec_deque::PlaceBack<'a, T> where
  T: Send,`
- `impl<'a, T> Send for PlaceFront<'a, T> where
  T: Send,`
- `impl<K, V, S> Send for HashMap<K, V, S> where
  K: Send,
  S: Send,
  V: Send,`
- `impl<T, S> Send for HashSet<T, S> where
  S: Send,
  T: Send,`
- `impl<'a, K, V> Send for std::collections::hash_map::Iter<'a, K, V> where
  K: Sync,
  V: Sync,`
- `impl<'a, K, V> Send for std::collections::hash_map::IterMut<'a, K, V> where
  K: Send,
  V: Send,`
- `impl<K, V> Send for std::collections::hash_map::IntoIter<K, V> where
  K: Send,
  V: Send,`
- `impl<'a, K, V> Send for std::collections::hash_map::Keys<'a, K, V> where
  K: Sync,
  V: Sync,`
- `impl<'a, K, V> Send for std::collections::hash_map::Values<'a, K, V> where
  K: Sync,
  V: Sync,`
- `impl<'a, K, V> Send for std::collections::hash_map::Drain<'a, K, V> where
  K: Send,
  V: Send,`
- `impl<'a, K, V> Send for std::collections::hash_map::ValuesMut<'a, K, V> where
  K: Send,
  V: Send,`
- `impl<'a, K, V> !Send for std::collections::hash_map::OccupiedEntry<'a, K, V>`
- `impl<'a, K, V> !Send for std::collections::hash_map::VacantEntry<'a, K, V>`
- `impl<'a, K, V> !Send for EntryPlace<'a, K, V>`
- `impl Send for RandomState`
- `impl Send for DefaultHasher`
- `impl<'a, K, V> !Send for std::collections::hash_map::Entry<'a, K, V>`
- `impl<'a, K> Send for std::collections::hash_set::Iter<'a, K> where
  K: Sync,`
- `impl<K> Send for std::collections::hash_set::IntoIter<K> where
  K: Send,`
- `impl<'a, K> Send for std::collections::hash_set::Drain<'a, K> where
  K: Send,`
- `impl<'a, T, S> Send for std::collections::hash_set::Intersection<'a, T, S> where
  S: Sync,
  T: Sync,`
- `impl<'a, T, S> Send for std::collections::hash_set::Difference<'a, T, S> where
  S: Sync,
  T: Sync,`
- `impl<'a, T, S> Send for std::collections::hash_set::SymmetricDifference<'a, T, S> where
  S: Sync,
  T: Sync,`
- `impl<'a, T, S> Send for std::collections::hash_set::Union<'a, T, S> where
  S: Sync,
  T: Sync,`
- `impl !Send for Vars`
- `impl !Send for VarsOs`
- `impl<'a> Send for SplitPaths<'a>`
- `impl Send for JoinPathsError`
- `impl Send for VarError`
- `impl Send for CString`
- `impl Send for CStr`
- `impl Send for NulError`
- `impl Send for IntoStringError`
- `impl Send for FromBytesWithNulError`
- `impl Send for OsString`
- `impl Send for OsStr`
- `impl Send for File`
- `impl Send for Metadata`
- `impl Send for ReadDir`
- `impl Send for DirEntry`
- `impl Send for OpenOptions`
- `impl Send for Permissions`
- `impl Send for FileType`
- `impl Send for DirBuilder`
- `impl<R> Send for BufReader<R> where
  R: Send,`
- `impl<W> Send for BufWriter<W> where
  W: Send,`
- `impl<W> Send for LineWriter<W> where
  W: Send,`
- `impl<W> Send for IntoInnerError<W> where
  W: Send,`
- `impl<T> Send for Cursor<T> where
  T: Send,`
- `impl Send for std::io::Error`
- `impl Send for Sink`
- `impl Send for std::io::Empty`
- `impl Send for std::io::Repeat`
- `impl Send for Stdin`
- `impl Send for Stdout`
- `impl Send for Stderr`
- `impl<'a> !Send for StdoutLock<'a>`
- `impl<'a> !Send for StderrLock<'a>`
- `impl<'a> !Send for StdinLock<'a>`
- `impl Send for Initializer`
- `impl<T, U> Send for std::io::Chain<T, U> where
  T: Send,
  U: Send,`
- `impl<T> Send for std::io::Take<T> where
  T: Send,`
- `impl<R> Send for std::io::Bytes<R> where
  R: Send,`
- `impl<R> Send for std::io::Chars<R> where
  R: Send,`
- `impl<B> Send for std::io::Split<B> where
  B: Send,`
- `impl<B> Send for std::io::Lines<B> where
  B: Send,`
- `impl Send for ErrorKind`
- `impl Send for SeekFrom`
- `impl Send for CharsError`
- `impl Send for Ipv4Addr`
- `impl Send for Ipv6Addr`
- `impl Send for SocketAddrV4`
- `impl Send for SocketAddrV6`
- `impl Send for TcpStream`
- `impl Send for TcpListener`
- `impl<'a> Send for std::net::Incoming<'a>`
- `impl Send for UdpSocket`
- `impl Send for AddrParseError`
- `impl Send for LookupHost`
- `impl Send for IpAddr`
- `impl Send for Ipv6MulticastScope`
- `impl Send for std::net::SocketAddr`
- `impl Send for Shutdown`
- `impl Send for FpCategory`
- `impl Send for ParseIntError`
- `impl Send for ParseFloatError`
- `impl Send for TryFromIntError`
- `impl<T> Send for Wrapping<T> where
  T: Send,`
- `impl Send for std::os::unix::net::SocketAddr`
- `impl Send for UnixStream`
- `impl Send for UnixListener`
- `impl<'a> Send for std::os::unix::net::Incoming<'a>`
- `impl Send for UnixDatagram`
- `impl<'a> Send for EncodeWide<'a>`
- `impl Send for stat`
- `impl Send for c_void`
- `impl<'a> !Send for PanicInfo<'a>`
- `impl<'a> Send for Location<'a>`
- `impl<T> Send for AssertUnwindSafe<T> where
  T: Send,`
- `impl<'a> Send for PrefixComponent<'a>`
- `impl<'a> Send for Components<'a>`
- `impl<'a> Send for std::path::Iter<'a>`
- `impl Send for PathBuf`
- `impl Send for Path`
- `impl Send for StripPrefixError`
- `impl<'a> Send for Display<'a>`
- `impl<'a> Send for Prefix<'a>`
- `impl<'a> Send for Component<'a>`
- `impl Send for Child`
- `impl Send for ChildStdin`
- `impl Send for ChildStdout`
- `impl Send for ChildStderr`
- `impl Send for Command`
- `impl Send for Output`
- `impl Send for Stdio`
- `impl Send for ExitStatus`
- `impl Send for AtomicBool`
- `impl Send for std::sync::atomic::Ordering`
- `impl Send for AtomicI8`
- `impl Send for AtomicU8`
- `impl Send for AtomicI16`
- `impl Send for AtomicU16`
- `impl Send for AtomicI32`
- `impl Send for AtomicU32`
- `impl Send for AtomicI64`
- `impl Send for AtomicU64`
- `impl Send for AtomicIsize`
- `impl Send for AtomicUsize`
- `impl Send for Barrier`
- `impl Send for BarrierWaitResult`
- `impl Send for Condvar`
- `impl Send for WaitTimeoutResult`
- `impl Send for OnceState`
- `impl<T> Send for PoisonError<T> where
  T: Send,`
- `impl<T> Send for TryLockError<T> where
  T: Send,`
- `impl<'rx, T> !Send for Handle<'rx, T>`
- `impl<'a, T> !Send for std::sync::mpsc::Iter<'a, T>`
- `impl<'a, T> !Send for TryIter<'a, T>`
- `impl<T> Send for std::sync::mpsc::IntoIter<T> where
  T: Send,`
- `impl<T> Send for SendError<T> where
  T: Send,`
- `impl Send for RecvError`
- `impl Send for TryRecvError`
- `impl Send for RecvTimeoutError`
- `impl<T> Send for TrySendError<T> where
  T: Send,`
- `impl Send for Duration`
- `impl Send for Instant`
- `impl Send for SystemTime`
- `impl Send for SystemTimeError`
- `impl Send for Heap`
- `impl Send for Layout`
- `impl !Send for Excess`
- `impl Send for CannotReallocInPlace`
- `impl Send for AllocErr`
- `impl Send for System`

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