Clone in std::clone - Rust
Description: A common trait that allows explicit creation of a duplicate value.

## Clone

# Trait Clone

1.0.0 (const: unstable) · Source

    pub trait Clone: Sized {
        // Required method
        fn clone(&self) -> Self;

        // Provided method
        fn clone_from(&mut self, source: &Self) { ... }
    }

Expand description

A common trait that allows explicit creation of a duplicate value.

Calling `clone` always produces a new value. However, for types that are references to other data (such as smart pointers or references), the new value may still point to the same underlying data, rather than duplicating it. See `Clone::clone` for more details.

This distinction is especially important when using `#[derive(Clone)]` on structs containing smart pointers like `Arc<Mutex<T>>` - the cloned struct will share mutable state with the original.

Differs from `Copy` in that `Copy` is implicit and an inexpensive bit-wise copy, while `Clone` is always explicit and may or may not be expensive. `Copy` has no methods, so you cannot change its behavior, but when implementing `Clone`, the `clone` method you provide may run arbitrary code.

Since `Clone` is a supertrait of `Copy`, any type that implements `Copy` must also implement `Clone`.

### §Derivable

This trait can be used with `#[derive]` if all fields are `Clone`. The `derive`d implementation of `Clone` calls `clone` on each field.

For a generic struct, `#[derive]` implements `Clone` conditionally by adding bound `Clone` on generic parameters.

    // `derive` implements Clone for Reading<T> when T is Clone.
    #[derive(Clone)]
    struct Reading<T> {
        frequency: T,
    }

### §How can I implement `Clone`?

Types that are `Copy` should have a trivial implementation of `Clone`. More formally: if `T: Copy`, `x: T`, and `y: &T`, then `let x = y.clone();` is equivalent to `let x = *y;`. Manual implementations should be careful to uphold this invariant; however, unsafe code must not rely on it to ensure memory safety.

An example is a generic struct holding a function pointer. In this case, the implementation of `Clone` cannot be `derive`d, but can be implemented as:

    struct Generate<T>(fn() -> T);

    impl<T> Copy for Generate<T> {}

    impl<T> Clone for Generate<T> {
        fn clone(&self) -> Self {
            *self
        }
    }

If we `derive`:

    #[derive(Copy, Clone)]
    struct Generate<T>(fn() -> T);

the auto-derived implementations will have unnecessary `T: Copy` and `T: Clone` bounds:

    // Automatically derived
    impl<T: Copy> Copy for Generate<T> { }

    // Automatically derived
    impl<T: Clone> Clone for Generate<T> {
        fn clone(&self) -> Generate<T> {
            Generate(Clone::clone(&self.0))
        }
    }

The bounds are unnecessary because clearly the function itself should be copy- and cloneable even if its return type is not:

ⓘ

    #[derive(Copy, Clone)]
    struct Generate<T>(fn() -> T);

    struct NotCloneable;

    fn generate_not_cloneable() -> NotCloneable {
        NotCloneable
    }

    Generate(generate_not_cloneable).clone(); // error: trait bounds were not satisfied
    // Note: With the manual implementations the above line will compile.

### §`Clone` and `PartialEq`/`Eq`

`Clone` is intended for the duplication of objects. Consequently, when implementing both `Clone` and `PartialEq`, the following property is expected to hold:

    x == x -> x.clone() == x

In other words, if an object compares equal to itself, its clone must also compare equal to the original.

For types that also implement `Eq` – for which `x == x` always holds – this implies that `x.clone() == x` must always be true. Standard library collections such as `HashMap`, `HashSet`, `BTreeMap`, `BTreeSet` and `BinaryHeap` rely on their keys respecting this property for correct behavior. Furthermore, these collections require that cloning a key preserves the outcome of the `Hash` and `Ord` methods. Thankfully, this follows automatically from `x.clone() == x` if `Hash` and `Ord` are correctly implemented according to their own requirements.

When deriving both `Clone` and `PartialEq` using `#[derive(Clone, PartialEq)]` or when additionally deriving `Eq` using `#[derive(Clone, PartialEq, Eq)]`, then this property is automatically upheld – provided that it is satisfied by the underlying types.

Violating this property is a logic error. The behavior resulting from a logic error is not specified, but users of the trait must ensure that such logic errors do not result in undefined behavior. This means that `unsafe` code must not rely on this property being satisfied.

### §Additional implementors

In addition to the implementors listed below, the following types also implement `Clone`:

- Function item types (i.e., the distinct types defined for each function)
- Function pointer types (e.g., `fn() -> i32`)
- Closure types, if they capture no value from the environment or if all such captured values implement `Clone` themselves. Note that variables captured by shared reference always implement `Clone` (even if the referent doesn’t), while variables captured by mutable reference never implement `Clone`.

## Required Methods§

1.0.0 · Source

#### fn clone(&self) -> Self

Returns a duplicate of the value.

Note that what “duplicate” means varies by type:

- For most types, this creates a deep, independent copy
- For reference types like `&T`, this creates another reference to the same value
- For smart pointers like `Arc` or `Rc`, this increments the reference count but still points to the same underlying data

##### §Examples

    let hello = "Hello"; // &str implements Clone

    assert_eq!("Hello", hello.clone());

Example with a reference-counted type:

    use std::sync::{Arc, Mutex};

    let data = Arc::new(Mutex::new(vec![1, 2, 3]));
    let data_clone = data.clone(); // Creates another Arc pointing to the same Mutex

    {
        let mut lock = data.lock().unwrap();
        lock.push(4);
    }

    // Changes are visible through the clone because they share the same underlying data
    assert_eq!(*data_clone.lock().unwrap(), vec![1, 2, 3, 4]);

## Provided Methods§

1.0.0 · Source

#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`.

`a.clone_from(&b)` is equivalent to `a = b.clone()` in functionality, but can be overridden to reuse the resources of `a` to avoid unnecessary allocations.

## Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

## Implementors§

1.0.0 · Source§

### impl<T> !Clone for &mut T
where T: ?Sized,

Shared references can be cloned, but mutable references cannot!

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### impl Clone for AsciiChar

1.0.0 (const: unstable) · Source§

### impl Clone for std::cmp::Ordering

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### impl Clone for TryReserveErrorKind

1.34.0 (const: unstable) · Source§

### impl Clone for Infallible

1.0.0 · Source§

### impl Clone for VarError

1.64.0 · Source§

### impl Clone for FromBytesWithNulError

1.28.0 · Source§

### impl Clone for std::fmt::Alignment

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### impl Clone for DebugAsHex

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### impl Clone for Sign

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### impl Clone for Locality

1.0.0 · Source§

### impl Clone for ErrorKind

1.0.0 · Source§

### impl Clone for SeekFrom

1.7.0 · Source§

### impl Clone for IpAddr

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### impl Clone for Ipv6MulticastScope

1.0.0 · Source§

### impl Clone for Shutdown

1.0.0 · Source§

### impl Clone for SocketAddr

1.0.0 · Source§

### impl Clone for FpCategory

1.55.0 · Source§

### impl Clone for IntErrorKind

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### impl Clone for BacktraceStyle

1.86.0 · Source§

### impl Clone for GetDisjointMutError

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### impl Clone for SearchStep

1.0.0 · Source§

### impl Clone for std::sync::atomic::Ordering

1.12.0 · Source§

### impl Clone for RecvTimeoutError

1.0.0 · Source§

### impl Clone for TryRecvError

1.0.0 (const: unstable) · Source§

### impl Clone for bool

1.0.0 (const: unstable) · Source§

### impl Clone for char

1.0.0 (const: unstable) · Source§

### impl Clone for f16

1.0.0 (const: unstable) · Source§

### impl Clone for f32

1.0.0 (const: unstable) · Source§

### impl Clone for f64

1.0.0 (const: unstable) · Source§

### impl Clone for f128

1.0.0 (const: unstable) · Source§

### impl Clone for i8

1.0.0 (const: unstable) · Source§

### impl Clone for i16

1.0.0 (const: unstable) · Source§

### impl Clone for i32

1.0.0 (const: unstable) · Source§

### impl Clone for i64

1.0.0 (const: unstable) · Source§

### impl Clone for i128

1.0.0 (const: unstable) · Source§

### impl Clone for isize

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### impl Clone for !

1.0.0 (const: unstable) · Source§

### impl Clone for u8

1.0.0 (const: unstable) · Source§

### impl Clone for u16

1.0.0 (const: unstable) · Source§

### impl Clone for u32

1.0.0 (const: unstable) · Source§

### impl Clone for u64

1.0.0 (const: unstable) · Source§

### impl Clone for u128

1.0.0 (const: unstable) · Source§

### impl Clone for usize

1.54.0 · Source§

### impl Clone for v128

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### impl Clone for AllocError

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### impl Clone for Global

1.28.0 · Source§

### impl Clone for Layout

1.50.0 · Source§

### impl Clone for LayoutError

1.28.0 · Source§

### impl Clone for System

1.0.0 (const: unstable) · Source§

### impl Clone for TypeId

1.34.0 · Source§

### impl Clone for TryFromSliceError

1.0.0 · Source§

### impl Clone for std::ascii::EscapeDefault

1.3.0 · Source§

### impl Clone for Box<str>

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### impl Clone for Box<ByteStr>

1.29.0 · Source§

### impl Clone for Box<CStr>

1.29.0 · Source§

### impl Clone for Box<OsStr>

1.29.0 · Source§

### impl Clone for Box<Path>

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### impl Clone for ByteString

1.34.0 · Source§

### impl Clone for CharTryFromError

1.9.0 · Source§

### impl Clone for DecodeUtf16Error

1.20.0 · Source§

### impl Clone for std::char::EscapeDebug

1.0.0 · Source§

### impl Clone for std::char::EscapeDefault

1.0.0 · Source§

### impl Clone for std::char::EscapeUnicode

1.20.0 · Source§

### impl Clone for ParseCharError

1.0.0 · Source§

### impl Clone for ToLowercase

1.0.0 · Source§

### impl Clone for ToUppercase

1.59.0 · Source§

### impl Clone for TryFromCharError

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### impl Clone for UnorderedKeyError

1.57.0 · Source§

### impl Clone for TryReserveError

1.64.0 · Source§

### impl Clone for CString

1.69.0 · Source§

### impl Clone for FromBytesUntilNulError

1.64.0 · Source§

### impl Clone for FromVecWithNulError

1.64.0 · Source§

### impl Clone for IntoStringError

1.64.0 · Source§

### impl Clone for NulError

1.0.0 · Source§

### impl Clone for OsString

1.0.0 · Source§

### impl Clone for Error

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### impl Clone for FormattingOptions

1.75.0 · Source§

### impl Clone for FileTimes

1.1.0 · Source§

### impl Clone for FileType

1.0.0 · Source§

### impl Clone for Metadata

1.0.0 · Source§

### impl Clone for OpenOptions

1.0.0 · Source§

### impl Clone for Permissions

1.7.0 · Source§

### impl Clone for DefaultHasher

1.7.0 · Source§

### impl Clone for RandomState

1.0.0 · Source§

### impl Clone for SipHasher

1.0.0 · Source§

### impl Clone for std::io::Empty

1.0.0 · Source§

### impl Clone for Sink

1.33.0 · Source§

### impl Clone for PhantomPinned

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### impl Clone for Assume

1.0.0 · Source§

### impl Clone for AddrParseError

1.0.0 · Source§

### impl Clone for Ipv4Addr

1.0.0 · Source§

### impl Clone for Ipv6Addr

1.0.0 · Source§

### impl Clone for SocketAddrV4

1.0.0 · Source§

### impl Clone for SocketAddrV6

1.0.0 · Source§

### impl Clone for ParseFloatError

1.0.0 · Source§

### impl Clone for ParseIntError

1.34.0 · Source§

### impl Clone for TryFromIntError

1.0.0 (const: unstable) · Source§

### impl Clone for RangeFull

1.0.0 · Source§

### impl Clone for PathBuf

1.7.0 · Source§

### impl Clone for StripPrefixError

1.61.0 · Source§

### impl Clone for ExitCode

1.0.0 · Source§

### impl Clone for ExitStatus

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### impl Clone for ExitStatusError

1.0.0 · Source§

### impl Clone for Output

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### impl Clone for std::ptr::Alignment

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### impl Clone for DefaultRandomSource

1.0.0 · Source§

### impl Clone for ParseBoolError

1.0.0 · Source§

### impl Clone for Utf8Error

1.0.0 · Source§

### impl Clone for FromUtf8Error

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### impl Clone for IntoChars

1.0.0 · Source§

### impl Clone for String

1.0.0 · Source§

### impl Clone for RecvError

1.5.0 · Source§

### impl Clone for WaitTimeoutResult

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### impl Clone for LocalWaker

1.36.0 · Source§

### impl Clone for RawWakerVTable

1.36.0 · Source§

### impl Clone for Waker

1.26.0 · Source§

### impl Clone for AccessError

1.0.0 · Source§

### impl Clone for Thread

1.19.0 · Source§

### impl Clone for ThreadId

1.3.0 · Source§

### impl Clone for Duration

1.8.0 · Source§

### impl Clone for Instant

1.8.0 · Source§

### impl Clone for SystemTime

1.8.0 · Source§

### impl Clone for SystemTimeError

1.66.0 · Source§

### impl Clone for TryFromFloatSecsError

1.0.0 · Source§

### impl<'a> Clone for Component<'a>

1.0.0 · Source§

### impl<'a> Clone for Prefix<'a>

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### impl<'a> Clone for Utf8Pattern<'a>

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### impl<'a> Clone for Source<'a>

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### impl<'a> Clone for core::ffi::c_str::Bytes<'a>

1.0.0 · Source§

### impl<'a> Clone for Arguments<'a>

1.36.0 · Source§

### impl<'a> Clone for IoSlice<'a>

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### impl<'a> Clone for PhantomContravariantLifetime<'a>

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### impl<'a> Clone for PhantomCovariantLifetime<'a>

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### impl<'a> Clone for PhantomInvariantLifetime<'a>

1.10.0 · Source§

### impl<'a> Clone for Location<'a>

1.28.0 · Source§

### impl<'a> Clone for Ancestors<'a>

1.0.0 · Source§

### impl<'a> Clone for Components<'a>

1.0.0 · Source§

### impl<'a> Clone for std::path::Iter<'a>

1.0.0 · Source§

### impl<'a> Clone for PrefixComponent<'a>

1.60.0 · Source§

### impl<'a> Clone for EscapeAscii<'a>

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### impl<'a> Clone for CharSearcher<'a>

1.0.0 · Source§

### impl<'a> Clone for std::str::Bytes<'a>

1.0.0 · Source§

### impl<'a> Clone for CharIndices<'a>

1.0.0 · Source§

### impl<'a> Clone for Chars<'a>

1.8.0 · Source§

### impl<'a> Clone for EncodeUtf16<'a>

1.34.0 · Source§

### impl<'a> Clone for std::str::EscapeDebug<'a>

1.34.0 · Source§

### impl<'a> Clone for std::str::EscapeDefault<'a>

1.34.0 · Source§

### impl<'a> Clone for std::str::EscapeUnicode<'a>

1.0.0 · Source§

### impl<'a> Clone for Lines<'a>

1.0.0 · Source§

### impl<'a> Clone for LinesAny<'a>

1.34.0 · Source§

### impl<'a> Clone for SplitAsciiWhitespace<'a>

1.1.0 · Source§

### impl<'a> Clone for SplitWhitespace<'a>

1.79.0 · Source§

### impl<'a> Clone for Utf8Chunk<'a>

1.79.0 · Source§

### impl<'a> Clone for Utf8Chunks<'a>

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### impl<'a, 'b> Clone for CharSliceSearcher<'a, 'b>

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### impl<'a, 'b> Clone for StrSearcher<'a, 'b>

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### impl<'a, 'b, const N: usize> Clone for CharArrayRefSearcher<'a, 'b, N>

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### impl<'a, F> Clone for CharPredicateSearcher<'a, F>
where F: Clone + FnMut(char) -> bool,

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### impl<'a, K> Clone for std::collections::btree_set::Cursor<'a, K>
where K: Clone + 'a,

1.5.0 · Source§

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

1.2.0 · Source§

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

1.5.0 · Source§

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

1.2.0 · Source§

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

1.0.0 · Source§

### impl<'a, P> Clone for std::str::RSplit<'a, P>
where P: Pattern, <P as Pattern>::Searcher<'a>: Clone,

1.0.0 · Source§

### impl<'a, P> Clone for RSplitN<'a, P>
where P: Pattern, <P as Pattern>::Searcher<'a>: Clone,

1.0.0 · Source§

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

1.0.0 · Source§

### impl<'a, P> Clone for std::str::Split<'a, P>
where P: Pattern, <P as Pattern>::Searcher<'a>: Clone,

1.51.0 · Source§

### impl<'a, P> Clone for std::str::SplitInclusive<'a, P>
where P: Pattern, <P as Pattern>::Searcher<'a>: Clone,

1.0.0 · Source§

### impl<'a, P> Clone for SplitN<'a, P>
where P: Pattern, <P as Pattern>::Searcher<'a>: Clone,

1.0.0 · Source§

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

1.31.0 · Source§

### impl<'a, T> Clone for RChunksExact<'a, T>

1.89.0 · Source§

### impl<'a, T, P> Clone for ChunkBy<'a, T, P>
where T: 'a, P: Clone,

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### impl<'a, const N: usize> Clone for CharArraySearcher<'a, N>

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### impl<'f> Clone for VaList<'f>

1.63.0 · Source§

### impl<'fd> Clone for BorrowedFd<'fd>

Available on Unix or HermitCore or `target_os=trusty` or WASI or `target_os=motor` only.
1.0.0 · Source§

### impl<A> Clone for Repeat<A>
where A: Clone,

1.82.0 · Source§

### impl<A> Clone for RepeatN<A>
where A: Clone,

1.0.0 · Source§

### impl<A> Clone for std::option::IntoIter<A>
where A: Clone,

1.0.0 · Source§

### impl<A> Clone for std::option::Iter<'_, A>

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### impl<A> Clone for OptionFlatten<A>
where A: Clone,

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### impl<A> Clone for RangeFromIter<A>
where A: Clone,

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### impl<A> Clone for RangeInclusiveIter<A>
where A: Clone,

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### impl<A> Clone for RangeIter<A>
where A: Clone,

1.0.0 · Source§

### impl<A, B> Clone for Chain<A, B>
where A: Clone, B: Clone,

1.0.0 · Source§

### impl<A, B> Clone for Zip<A, B>
where A: Clone, B: Clone,

1.0.0 · Source§

### impl<B> Clone for Cow<'_, B>
where B: ToOwned + ?Sized,

1.55.0 (const: unstable) · Source§

### impl<B, C> Clone for ControlFlow<B, C>
where B: Clone, C: Clone,

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### impl<Dyn> Clone for DynMetadata<Dyn>
where Dyn: ?Sized,

1.34.0 · Source§

### impl<F> Clone for FromFn<F>
where F: Clone,

1.43.0 · Source§

### impl<F> Clone for OnceWith<F>
where F: Clone,

1.28.0 · Source§

### impl<F> Clone for RepeatWith<F>
where F: Clone,

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### impl<G> Clone for FromCoroutine<G>
where G: Clone,

1.7.0 · Source§

### impl<H> Clone for BuildHasherDefault<H>

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### impl<I> Clone for FromIter<I>
where I: Clone,

1.9.0 · Source§

### impl<I> Clone for DecodeUtf16<I>
where I: Clone + Iterator<Item = u16>,

1.1.0 · Source§

### impl<I> Clone for Cloned<I>
where I: Clone,

1.36.0 · Source§

### impl<I> Clone for Copied<I>
where I: Clone,

1.0.0 · Source§

### impl<I> Clone for Cycle<I>
where I: Clone,

1.0.0 · Source§

### impl<I> Clone for Enumerate<I>
where I: Clone,

1.0.0 · Source§

### impl<I> Clone for Fuse<I>
where I: Clone,

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### impl<I> Clone for Intersperse<I>
where I: Clone + Iterator, <I as Iterator>::Item: Clone,

1.0.0 · Source§

### impl<I> Clone for Peekable<I>
where I: Clone + Iterator, <I as Iterator>::Item: Clone,

1.0.0 · Source§

### impl<I> Clone for Skip<I>
where I: Clone,

1.28.0 · Source§

### impl<I> Clone for StepBy<I>
where I: Clone,

1.0.0 · Source§

### impl<I> Clone for Take<I>
where I: Clone,

1.0.0 · Source§

### impl<I, F> Clone for FilterMap<I, F>
where I: Clone, F: Clone,

1.0.0 · Source§

### impl<I, F> Clone for Inspect<I, F>
where I: Clone, F: Clone,

1.0.0 · Source§

### impl<I, F> Clone for Map<I, F>
where I: Clone, F: Clone,

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### impl<I, F, const N: usize> Clone for MapWindows<I, F, N>
where I: Iterator + Clone, F: Clone, <I as Iterator>::Item: Clone,

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### impl<I, G> Clone for IntersperseWith<I, G>
where I: Iterator + Clone, <I as Iterator>::Item: Clone, G: Clone,

1.0.0 · Source§

### impl<I, P> Clone for Filter<I, P>
where I: Clone, P: Clone,

1.57.0 · Source§

### impl<I, P> Clone for MapWhile<I, P>
where I: Clone, P: Clone,

1.0.0 · Source§

### impl<I, P> Clone for SkipWhile<I, P>
where I: Clone, P: Clone,

1.0.0 · Source§

### impl<I, P> Clone for TakeWhile<I, P>
where I: Clone, P: Clone,

1.0.0 · Source§

### impl<I, St, F> Clone for Scan<I, St, F>
where I: Clone, St: Clone, F: Clone,

1.29.0 · Source§

### impl<I, U> Clone for Flatten<I>
where I: Clone + Iterator, <I as Iterator>::Item: IntoIterator<IntoIter = U, Item = <U as Iterator>::Item>, U: Clone + Iterator,

1.0.0 · Source§

### impl<I, U, F> Clone for FlatMap<I, U, F>
where I: Clone, F: Clone, U: Clone + IntoIterator, <U as IntoIterator>::IntoIter: Clone,

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### impl<I, const N: usize> Clone for ArrayChunks<I, N>
where I: Clone + Iterator, <I as Iterator>::Item: Clone,

1.0.0 (const: unstable) · Source§

### impl<Idx> Clone for std::ops::Range<Idx>
where Idx: Clone,

1.0.0 (const: unstable) · Source§

### impl<Idx> Clone for std::ops::RangeFrom<Idx>
where Idx: Clone,

1.26.0 · Source§

### impl<Idx> Clone for std::ops::RangeInclusive<Idx>
where Idx: Clone,

1.0.0 (const: unstable) · Source§

### impl<Idx> Clone for RangeTo<Idx>
where Idx: Clone,

1.26.0 · Source§

### impl<Idx> Clone for std::ops::RangeToInclusive<Idx>
where Idx: Clone,

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### impl<Idx> Clone for std::range::Range<Idx>
where Idx: Clone,

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### impl<Idx> Clone for std::range::RangeFrom<Idx>
where Idx: Clone,

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### impl<Idx> Clone for std::range::RangeInclusive<Idx>
where Idx: Clone,

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### impl<Idx> Clone for std::range::RangeToInclusive<Idx>
where Idx: Clone,

1.0.0 · Source§

### impl<K> Clone for std::collections::hash_set::Iter<'_, K>

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### impl<K, V> Clone for std::collections::btree_map::Cursor<'_, K, V>

1.0.0 · Source§

### impl<K, V> Clone for std::collections::btree_map::Iter<'_, K, V>

1.0.0 · Source§

### impl<K, V> Clone for std::collections::btree_map::Keys<'_, K, V>

1.17.0 · Source§

### impl<K, V> Clone for std::collections::btree_map::Range<'_, K, V>

1.0.0 · Source§

### impl<K, V> Clone for std::collections::btree_map::Values<'_, K, V>

1.0.0 · Source§

### impl<K, V> Clone for std::collections::hash_map::Iter<'_, K, V>

1.0.0 · Source§

### impl<K, V> Clone for std::collections::hash_map::Keys<'_, K, V>

1.0.0 · Source§

### impl<K, V> Clone for std::collections::hash_map::Values<'_, K, V>

1.0.0 · Source§

### impl<K, V, A> Clone for BTreeMap<K, V, A>
where K: Clone, V: Clone, A: Allocator + Clone,

1.0.0 · Source§

### impl<K, V, S, A> Clone for HashMap<K, V, S, A>
where K: Clone, V: Clone, S: Clone, A: Allocator + Clone,

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### impl<P> Clone for MaybeDangling<P>
where P: Clone + ?Sized,

1.33.0 · Source§

### impl<Ptr> Clone for Pin<Ptr>
where Ptr: Clone,

1.17.0 (const: unstable) · Source§

### impl<T> Clone for Bound<T>
where T: Clone,

1.0.0 (const: unstable) · Source§

### impl<T> Clone for Option<T>
where T: Clone,

1.36.0 · Source§

### impl<T> Clone for Poll<T>
where T: Clone,

1.0.0 (const: unstable) · Source§

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

1.0.0 (const: unstable) · Source§

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

1.0.0 (const: unstable) · Source§

### impl<T> Clone for &T
where T: ?Sized,

Shared references can be cloned, but mutable references cannot!

1.0.0 · Source§

### impl<T> Clone for Cell<T>
where T: Copy,

1.70.0 · Source§

### impl<T> Clone for OnceCell<T>
where T: Clone,

1.0.0 · Source§

### impl<T> Clone for RefCell<T>
where T: Clone,

1.19.0 · Source§

### impl<T> Clone for Reverse<T>
where T: Clone,

1.0.0 · Source§

### impl<T> Clone for std::collections::binary_heap::Iter<'_, T>

1.0.0 · Source§

### impl<T> Clone for std::collections::btree_set::Iter<'_, T>

1.17.0 · Source§

### impl<T> Clone for std::collections::btree_set::Range<'_, T>

1.0.0 · Source§

### impl<T> Clone for std::collections::btree_set::SymmetricDifference<'_, T>

1.0.0 · Source§

### impl<T> Clone for std::collections::btree_set::Union<'_, T>

1.0.0 · Source§

### impl<T> Clone for std::collections::linked_list::Iter<'_, T>

1.0.0 · Source§

### impl<T> Clone for std::collections::vec_deque::Iter<'_, T>

1.48.0 · Source§

### impl<T> Clone for Pending<T>

1.48.0 · Source§

### impl<T> Clone for Ready<T>
where T: Clone,

1.0.0 · Source§

### impl<T> Clone for std::io::Cursor<T>
where T: Clone,

1.2.0 · Source§

### impl<T> Clone for std::iter::Empty<T>

1.2.0 · Source§

### impl<T> Clone for Once<T>
where T: Clone,

1.0.0 · Source§

### impl<T> Clone for Rev<T>
where T: Clone,

Source§

### impl<T> Clone for PhantomContravariant<T>
where T: ?Sized,

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### impl<T> Clone for PhantomCovariant<T>
where T: ?Sized,

1.0.0 · Source§

### impl<T> Clone for PhantomData<T>
where T: ?Sized,

Source§

### impl<T> Clone for PhantomInvariant<T>
where T: ?Sized,

1.21.0 · Source§

### impl<T> Clone for Discriminant<T>

1.20.0 · Source§

### impl<T> Clone for ManuallyDrop<T>
where T: Clone + ?Sized,

1.28.0 · Source§

### impl<T> Clone for NonZero<T>
where T: ZeroablePrimitive,

1.74.0 · Source§

### impl<T> Clone for Saturating<T>
where T: Clone,

1.0.0 · Source§

### impl<T> Clone for Wrapping<T>
where T: Clone,

1.25.0 · Source§

### impl<T> Clone for NonNull<T>
where T: ?Sized,

1.0.0 · Source§

### impl<T> Clone for std::result::IntoIter<T>
where T: Clone,

1.0.0 · Source§

### impl<T> Clone for std::result::Iter<'_, T>

1.0.0 · Source§

### impl<T> Clone for Chunks<'_, T>

1.31.0 · Source§

### impl<T> Clone for ChunksExact<'_, T>

1.0.0 · Source§

### impl<T> Clone for std::slice::Iter<'_, T>

1.31.0 · Source§

### impl<T> Clone for RChunks<'_, T>

1.0.0 · Source§

### impl<T> Clone for Windows<'_, T>

Source§

### impl<T> Clone for Receiver<T>

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### impl<T> Clone for std::sync::mpmc::Sender<T>

1.0.0 · Source§

### impl<T> Clone for std::sync::mpsc::Sender<T>

1.0.0 · Source§

### impl<T> Clone for SyncSender<T>

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### impl<T> Clone for Exclusive<T>
where T: Sync + Clone,

1.36.0 · Source§

### impl<T> Clone for MaybeUninit<T>
where T: Copy,

1.3.0 · Source§

### impl<T, A> Clone for Box<[T], A>
where T: Clone, A: Allocator + Clone,

1.0.0 · Source§

### impl<T, A> Clone for Box<T, A>
where T: Clone, A: Allocator + Clone,

1.0.0 · Source§

### impl<T, A> Clone for std::collections::binary_heap::IntoIter<T, A>
where T: Clone, A: Clone + Allocator,

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### impl<T, A> Clone for IntoIterSorted<T, A>
where T: Clone, A: Clone + Allocator,

1.0.0 · Source§

### impl<T, A> Clone for std::collections::btree_set::Difference<'_, T, A>
where A: Allocator + Clone,

1.0.0 · Source§

### impl<T, A> Clone for std::collections::btree_set::Intersection<'_, T, A>
where A: Allocator + Clone,

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### impl<T, A> Clone for std::collections::linked_list::Cursor<'_, T, A>
where A: Allocator,

1.0.0 · Source§

### impl<T, A> Clone for std::collections::linked_list::IntoIter<T, A>
where T: Clone, A: Clone + Allocator,

1.0.0 · Source§

### impl<T, A> Clone for BTreeSet<T, A>
where T: Clone, A: Allocator + Clone,

1.0.0 · Source§

### impl<T, A> Clone for BinaryHeap<T, A>
where T: Clone, A: Allocator + Clone,

1.0.0 · Source§

### impl<T, A> Clone for LinkedList<T, A>
where T: Clone, A: Allocator + Clone,

1.0.0 · Source§

### impl<T, A> Clone for VecDeque<T, A>
where T: Clone, A: Allocator + Clone,

1.0.0 · Source§

### impl<T, A> Clone for std::collections::vec_deque::IntoIter<T, A>
where T: Clone, A: Clone + Allocator,

1.0.0 · Source§

### impl<T, A> Clone for Rc<T, A>
where A: Allocator + Clone, T: ?Sized,

1.4.0 · Source§

### impl<T, A> Clone for std::rc::Weak<T, A>
where A: Allocator + Clone, T: ?Sized,

1.0.0 · Source§

### impl<T, A> Clone for Arc<T, A>
where A: Allocator + Clone, T: ?Sized,

1.4.0 · Source§

### impl<T, A> Clone for std::sync::Weak<T, A>
where A: Allocator + Clone, T: ?Sized,

1.8.0 · Source§

### impl<T, A> Clone for std::vec::IntoIter<T, A>
where T: Clone, A: Allocator + Clone,

1.0.0 · Source§

### impl<T, A> Clone for Vec<T, A>
where T: Clone, A: Allocator + Clone,

1.0.0 · Source§

### impl<T, E> Clone for Result<T, E>
where T: Clone, E: Clone,

1.34.0 · Source§

### impl<T, F> Clone for Successors<T, F>
where T: Clone, F: Clone,

1.27.0 · Source§

### impl<T, P> Clone for std::slice::RSplit<'_, T, P>
where P: Clone + FnMut(&T) -> bool,

1.0.0 · Source§

### impl<T, P> Clone for std::slice::Split<'_, T, P>
where P: Clone + FnMut(&T) -> bool,

1.51.0 · Source§

### impl<T, P> Clone for std::slice::SplitInclusive<'_, T, P>
where P: Clone + FnMut(&T) -> bool,

1.0.0 · Source§

### impl<T, S, A> Clone for HashSet<T, S, A>
where T: Clone, S: Clone, A: Allocator + Clone,

1.0.0 · Source§

### impl<T, S, A: Allocator> Clone for std::collections::hash_set::Difference<'_, T, S, A>

1.0.0 · Source§

### impl<T, S, A: Allocator> Clone for std::collections::hash_set::Intersection<'_, T, S, A>

1.0.0 · Source§

### impl<T, S, A: Allocator> Clone for std::collections::hash_set::SymmetricDifference<'_, T, S, A>

1.0.0 · Source§

### impl<T, S, A: Allocator> Clone for std::collections::hash_set::Union<'_, T, S, A>

1.58.0 · Source§

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

1.51.0 · Source§

### impl<T, const N: usize> Clone for std::array::IntoIter<T, N>
where T: Clone,

Source§

### impl<T, const N: usize> Clone for Mask<T, N>
where T: MaskElement, LaneCount<N>: SupportedLaneCount,

Source§

### impl<T, const N: usize> Clone for Simd<T, N>
where LaneCount<N>: SupportedLaneCount, T: SimdElement,

1.94.0 · Source§

### impl<T, const N: usize> Clone for ArrayWindows<'_, T, N>

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### impl<T: Clone> Clone for SendTimeoutError<T>

1.0.0 · Source§

### impl<T: Clone> Clone for TrySendError<T>

1.0.0 · Source§

### impl<T: Clone> Clone for SendError<T>

1.70.0 · Source§

### impl<T: Clone> Clone for OnceLock<T>

Source§

### impl<Y, R> Clone for CoroutineState<Y, R>
where Y: Clone, R: Clone,