Trait std::clone::Clone 1.0.0
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#[lang = "clone"]pub trait Clone { fn clone(&self) -> Self; fn clone_from(&mut self, source: &Self) { ... } }
A common trait for the ability to explicitly duplicate an object.
Differs from Copy in that Copy is implicit and extremely inexpensive, while
Clone is always explicit and may or may not be expensive. In order to enforce
these characteristics, Rust does not allow you to reimplement Copy, but you
may reimplement Clone and run arbitrary code.
Since Clone is more general than Copy, you can automatically make anything
Copy be Clone as well.
Derivable
This trait can be used with #[derive] if all fields are Clone. The derived
implementation of clone calls clone on each field.
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 an array holding more than 32 elements of a type that is Clone; the standard
library only implements Clone up until arrays of size 32. In this case, the implementation of
Clone cannot be derived, but can be implemented as:
#[derive(Copy)] struct Stats { frequencies: [i32; 100], } impl Clone for Stats { fn clone(&self) -> Stats { *self } }Run
Required Methods
fn clone(&self) -> Self
Provided Methods
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.
Implementations on Foreign Types
impl Clone for Exp1[src]
impl Clone for XorShiftRng[src]
fn clone(&self) -> XorShiftRng[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for IsaacRng[src]
impl Clone for ChaChaRng[src]
impl Clone for LogNormal[src]
impl Clone for StandardNormal[src]
fn clone(&self) -> StandardNormal[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for Isaac64Rng[src]
fn clone(&self) -> Isaac64Rng[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for Normal[src]
impl Clone for ReseedWithDefault[src]
fn clone(&self) -> ReseedWithDefault[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for Exp[src]
impl Clone for _Unwind_Reason_Code
fn clone(&self) -> _Unwind_Reason_Code
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for _Unwind_Action
fn clone(&self) -> _Unwind_Action
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl<I> Clone for Utf16Encoder<I> where
I: Clone, [src]
I: Clone,
fn clone(&self) -> Utf16Encoder<I>[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl<T> Clone for NonZero<T> where
T: Zeroable + Clone, [src]
T: Zeroable + Clone,
impl Clone for stack_t[src]
impl Clone for pthread_mutex_t[src]
fn clone(&self) -> pthread_mutex_t[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for ucontext_t[src]
fn clone(&self) -> ucontext_t[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for addrinfo[src]
impl Clone for rlimit64[src]
impl Clone for input_id[src]
impl Clone for termios[src]
impl Clone for pollfd[src]
impl Clone for ff_periodic_effect[src]
fn clone(&self) -> ff_periodic_effect[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for sockaddr_nl[src]
fn clone(&self) -> sockaddr_nl[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for sockaddr[src]
impl Clone for ff_ramp_effect[src]
fn clone(&self) -> ff_ramp_effect[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for winsize[src]
impl Clone for itimerval[src]
impl Clone for siginfo_t[src]
impl Clone for ff_rumble_effect[src]
fn clone(&self) -> ff_rumble_effect[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for user[src]
impl Clone for if_nameindex[src]
fn clone(&self) -> if_nameindex[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for utimbuf[src]
impl Clone for sembuf[src]
impl Clone for mcontext_t[src]
fn clone(&self) -> mcontext_t[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for fd_set[src]
impl Clone for _libc_fpstate[src]
fn clone(&self) -> _libc_fpstate[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for ff_envelope[src]
fn clone(&self) -> ff_envelope[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for epoll_event[src]
fn clone(&self) -> epoll_event[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for stat[src]
impl Clone for ff_condition_effect[src]
fn clone(&self) -> ff_condition_effect[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for lconv[src]
impl Clone for statvfs[src]
impl Clone for msqid_ds[src]
impl Clone for shmid_ds[src]
impl Clone for flock[src]
impl Clone for sigval[src]
impl Clone for ip_mreq[src]
impl Clone for sigaction[src]
impl Clone for signalfd_siginfo[src]
fn clone(&self) -> signalfd_siginfo[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for glob64_t[src]
impl Clone for in6_addr[src]
impl Clone for sched_param[src]
fn clone(&self) -> sched_param[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for Dl_info[src]
impl Clone for sockaddr_in[src]
fn clone(&self) -> sockaddr_in[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for input_event[src]
fn clone(&self) -> input_event[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for ipv6_mreq[src]
impl Clone for glob_t[src]
impl Clone for msghdr[src]
impl Clone for linger[src]
impl Clone for statfs[src]
impl Clone for input_mask[src]
fn clone(&self) -> input_mask[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for pthread_rwlock_t[src]
fn clone(&self) -> pthread_rwlock_t[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for pthread_rwlockattr_t[src]
fn clone(&self) -> pthread_rwlockattr_t[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for sysinfo[src]
impl Clone for user_regs_struct[src]
fn clone(&self) -> user_regs_struct[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for _libc_fpxreg[src]
fn clone(&self) -> _libc_fpxreg[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for fsid_t[src]
impl Clone for in_addr[src]
impl Clone for msginfo[src]
impl Clone for rlimit[src]
impl Clone for pthread_condattr_t[src]
fn clone(&self) -> pthread_condattr_t[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for ff_trigger[src]
fn clone(&self) -> ff_trigger[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for pthread_mutexattr_t[src]
fn clone(&self) -> pthread_mutexattr_t[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for timeval[src]
impl Clone for ff_effect[src]
impl Clone for passwd[src]
impl Clone for ifaddrs[src]
impl Clone for sockaddr_un[src]
fn clone(&self) -> sockaddr_un[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for statvfs64[src]
impl Clone for sigset_t[src]
impl Clone for iovec[src]
impl Clone for user_fpregs_struct[src]
fn clone(&self) -> user_fpregs_struct[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for tm[src]
impl Clone for spwd[src]
impl Clone for cpu_set_t[src]
impl Clone for sockaddr_ll[src]
fn clone(&self) -> sockaddr_ll[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for group[src]
impl Clone for _libc_xmmreg[src]
fn clone(&self) -> _libc_xmmreg[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for ff_constant_effect[src]
fn clone(&self) -> ff_constant_effect[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for sockaddr_in6[src]
fn clone(&self) -> sockaddr_in6[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for mmsghdr[src]
impl Clone for dqblk[src]
impl Clone for dirent64[src]
impl Clone for sockaddr_storage[src]
fn clone(&self) -> sockaddr_storage[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for ff_replay[src]
impl Clone for input_keymap_entry[src]
fn clone(&self) -> input_keymap_entry[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for ucred[src]
impl Clone for __timeval[src]
impl Clone for timespec[src]
impl Clone for pthread_attr_t[src]
fn clone(&self) -> pthread_attr_t[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for utsname[src]
impl Clone for sigevent[src]
impl Clone for dirent[src]
impl Clone for __exit_status[src]
fn clone(&self) -> __exit_status[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for rusage[src]
impl Clone for aiocb[src]
impl Clone for ipc_perm[src]
impl Clone for statfs64[src]
impl Clone for mq_attr[src]
impl Clone for stat64[src]
impl Clone for cmsghdr[src]
impl Clone for input_absinfo[src]
fn clone(&self) -> input_absinfo[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for utmpx[src]
impl Clone for tms[src]
impl Clone for hostent[src]
impl Clone for pthread_cond_t[src]
fn clone(&self) -> pthread_cond_t[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Clone for sem_t[src]
Implementors
impl<'a> Clone for SplitWhitespace<'a>impl Clone for DecodeUtf16Errorimpl<I> Clone for DecodeUtf16<I> where
I: Clone + Iterator<Item = u16>,impl<'a, T, P> Clone for std::slice::RSplit<'a, T, P> where
P: Clone + FnMut(&T) -> bool,
T: 'a + Clone,impl<T> Clone for Option<T> where
T: Clone,impl<T> Clone for Discriminant<T>impl Clone for SipHasherimpl<T> Clone for Cell<T> where
T: Copy,impl<T> Clone for Once<T> where
T: Clone,impl<'a, F> Clone for CharPredicateSearcher<'a, F> where
F: Clone + FnMut(char) -> bool,impl Clone for ParseCharErrorimpl<T> Clone for Wrapping<T> where
T: Clone,impl<T> Clone for Unique<T> where
T: ?Sized,impl<I> Clone for DecodeUtf8<I> where
I: Clone + Iterator<Item = u8>,impl<I, F> Clone for Inspect<I, F> where
F: Clone,
I: Clone,impl Clone for EscapeDefaultimpl Clone for Utf8Errorimpl<'a> Clone for CharSearcher<'a>impl<'a, P> Clone for std::str::Split<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: Clone,impl<'a> Clone for Lines<'a>impl<'a, P> Clone for RMatchIndices<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: Clone,impl<A, B> Clone for Zip<A, B> where
A: Clone,
B: Clone,impl<I> Clone for Skip<I> where
I: Clone,impl<I> Clone for Cloned<I> where
I: Clone,impl<'a, P> Clone for RSplitTerminator<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: Clone,impl<'a> Clone for Arguments<'a>impl<I> Clone for Take<I> where
I: Clone,impl Clone for TypeIdimpl<'a, P> Clone for SplitTerminator<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: Clone,impl<Y, R> Clone for GeneratorState<Y, R> where
R: Clone,
Y: Clone,impl<'a, T> Clone for Chunks<'a, T>impl<'a> Clone for CharIndices<'a>impl Clone for EscapeDebugimpl<'a, P> Clone for RSplitN<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: Clone,impl Clone for std::sync::atomic::Orderingimpl<I> Clone for Peekable<I> where
I: Clone + Iterator,
<I as Iterator>::Item: Clone,impl<T> Clone for Shared<T> where
T: ?Sized,impl<Idx> Clone for RangeToInclusive<Idx> where
Idx: Clone,impl Clone for TryFromIntErrorimpl<'a, P> Clone for SplitN<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: Clone,impl<A, B> Clone for Chain<A, B> where
A: Clone,
B: Clone,impl Clone for SearchStepimpl Clone for EscapeUnicodeimpl<'a, 'b> Clone for StrSearcher<'a, 'b>impl<I> Clone for Cycle<I> where
I: Clone,impl<I, P> Clone for SkipWhile<I, P> where
I: Clone,
P: Clone,impl<'a, T> Clone for Windows<'a, T>impl Clone for ParseFloatErrorimpl<T> Clone for Rev<T> where
T: Clone,impl<'a, T, P> Clone for std::slice::Split<'a, T, P> where
P: Clone + FnMut(&T) -> bool,impl<I, P> Clone for Filter<I, P> where
I: Clone,
P: Clone,impl<'a, P> Clone for MatchIndices<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: Clone,impl<A> Clone for Repeat<A> where
A: Clone,impl Clone for ParseBoolErrorimpl<Idx> Clone for RangeInclusive<Idx> where
Idx: Clone,impl<'a, P> Clone for Matches<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: Clone,impl<I> Clone for Enumerate<I> where
I: Clone,impl<T> Clone for PhantomData<T> where
T: ?Sized,impl<'a, T> Clone for std::result::Iter<'a, T>impl<T> Clone for Empty<T>impl<Idx> Clone for std::ops::Range<Idx> where
Idx: Clone,impl<I> Clone for Fuse<I> where
I: Clone,impl<T> Clone for RefCell<T> where
T: Clone,impl<'a, A> Clone for std::option::Iter<'a, A>impl Clone for TraitObjectimpl Clone for ParseIntErrorimpl Clone for Errorimpl<A> Clone for std::option::IntoIter<A> where
A: Clone,impl<T, E> Clone for Result<T, E> where
E: Clone,
T: Clone,impl<'a, 'b> Clone for CharSliceSearcher<'a, 'b>impl Clone for std::cmp::Orderingimpl<'a> Clone for LinesAny<'a>impl Clone for FpCategoryimpl<I, F> Clone for FilterMap<I, F> where
F: Clone,
I: Clone,impl<'a> Clone for Chars<'a>impl<Idx> Clone for RangeTo<Idx> where
Idx: Clone,impl Clone for SipHasher13impl<'a, P> Clone for std::str::RSplit<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: Clone,impl<I> Clone for StepBy<I> where
I: Clone,impl<'a, P> Clone for RMatches<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: Clone,impl<Idx> Clone for RangeFrom<Idx> where
Idx: Clone,impl<H> Clone for BuildHasherDefault<H>impl<I, P> Clone for TakeWhile<I, P> where
I: Clone,
P: Clone,impl Clone for CharTryFromErrorimpl Clone for SipHasher24impl Clone for RangeFullimpl<'a, T> Clone for std::slice::Iter<'a, T>impl<I, St, F> Clone for Scan<I, St, F> where
F: Clone,
I: Clone,
St: Clone,impl<I, U, F> Clone for FlatMap<I, U, F> where
F: Clone,
I: Clone,
U: Clone + IntoIterator,
<U as IntoIterator>::IntoIter: Clone,
<U as IntoIterator>::IntoIter: Clone,impl<'a> Clone for Bytes<'a>impl<I, F> Clone for Map<I, F> where
F: Clone,
I: Clone,impl<'a> Clone for EncodeUtf16<'a>impl<T> Clone for VecDeque<T> where
T: Clone,impl<'a, K, V> Clone for std::collections::btree_map::Keys<'a, K, V>impl<T> Clone for std::sync::Weak<T> where
T: ?Sized,impl<T> Clone for std::collections::linked_list::IntoIter<T> where
T: Clone,impl<'a, T> Clone for std::collections::btree_set::Difference<'a, T>impl<T> Clone for std::collections::vec_deque::IntoIter<T> where
T: Clone,impl Clone for Box<str>impl<'a, K, V> Clone for std::collections::btree_map::Range<'a, K, V>impl<'a, T> Clone for std::collections::linked_list::Iter<'a, T>impl<T> Clone for std::rc::Weak<T> where
T: ?Sized,impl<'a, K, V> Clone for std::collections::btree_map::Values<'a, K, V>impl<'a, T> Clone for std::collections::btree_set::Iter<'a, T>impl<K, V> Clone for BTreeMap<K, V> where
K: Clone,
V: Clone,impl<T> Clone for LinkedList<T> where
T: Clone,impl Clone for AllocErrimpl<'a, B> Clone for Cow<'a, B> where
B: ToOwned + ?Sized,impl<'a, T> Clone for std::collections::vec_deque::Iter<'a, T>impl<'a, T> Clone for std::collections::btree_set::Union<'a, T>impl<'a, T> Clone for std::collections::btree_set::Range<'a, T>impl<T> Clone for BTreeSet<T> where
T: Clone,impl Clone for Layoutimpl<T> Clone for Arc<T> where
T: ?Sized,impl<T> Clone for Vec<T> where
T: Clone,impl Clone for Heapimpl<'a, T> Clone for std::collections::btree_set::Intersection<'a, T>impl<'a, T> Clone for std::collections::binary_heap::Iter<'a, T>impl Clone for ExchangeHeapSingletonimpl<T> Clone for Bound<T> where
T: Clone,impl Clone for Stringimpl<T> Clone for Rc<T> where
T: ?Sized,impl<T> Clone for Box<T> where
T: Clone,impl<T> Clone for std::vec::IntoIter<T> where
T: Clone,impl Clone for ParseErrorimpl<T> Clone for std::collections::binary_heap::IntoIter<T> where
T: Clone,impl<T> Clone for BinaryHeap<T> where
T: Clone,impl<'a, K, V> Clone for std::collections::btree_map::Iter<'a, K, V>impl<T> Clone for Box<[T]> where
T: Clone,impl<'a, T> Clone for std::collections::btree_set::SymmetricDifference<'a, T>impl Clone for CannotReallocInPlaceimpl Clone for LocalKeyStateimpl Clone for ThreadIdimpl Clone for Threadimpl<K: Clone, V: Clone, S: Clone> Clone for HashMap<K, V, S>impl<'a, K, V> Clone for std::collections::hash_map::Iter<'a, K, V>impl<'a, K, V> Clone for std::collections::hash_map::Keys<'a, K, V>impl<'a, K, V> Clone for std::collections::hash_map::Values<'a, K, V>impl Clone for RandomStateimpl Clone for DefaultHasherimpl<T: Clone, S: Clone> Clone for HashSet<T, S>impl<'a, K> Clone for std::collections::hash_set::Iter<'a, K>impl<'a, T, S> Clone for std::collections::hash_set::Intersection<'a, T, S>impl<'a, T, S> Clone for std::collections::hash_set::Difference<'a, T, S>impl<'a, T, S> Clone for std::collections::hash_set::SymmetricDifference<'a, T, S>impl<'a, T, S> Clone for std::collections::hash_set::Union<'a, T, S>impl Clone for VarErrorimpl Clone for CStringimpl Clone for NulErrorimpl Clone for FromBytesWithNulErrorimpl Clone for IntoStringErrorimpl Clone for OsStringimpl Clone for Metadataimpl Clone for OpenOptionsimpl Clone for Permissionsimpl Clone for FileTypeimpl<T: Clone> Clone for Cursor<T>impl Clone for ErrorKindimpl Clone for SeekFromimpl Clone for IpAddrimpl Clone for Ipv6MulticastScopeimpl Clone for Ipv4Addrimpl Clone for Ipv6Addrimpl Clone for std::net::SocketAddrimpl Clone for SocketAddrV4impl Clone for SocketAddrV6impl Clone for AddrParseErrorimpl Clone for Shutdownimpl Clone for std::os::linux::raw::statimpl<'a> Clone for Prefix<'a>impl<'a> Clone for PrefixComponent<'a>impl<'a> Clone for Component<'a>impl<'a> Clone for Components<'a>impl<'a> Clone for std::path::Iter<'a>impl Clone for PathBufimpl Clone for StripPrefixErrorimpl Clone for Outputimpl Clone for ExitStatusimpl<T: Clone> Clone for SendError<T>impl Clone for RecvErrorimpl Clone for TryRecvErrorimpl Clone for RecvTimeoutErrorimpl<T: Clone> Clone for TrySendError<T>impl<T> Clone for Sender<T>impl<T> Clone for SyncSender<T>impl Clone for WaitTimeoutResultimpl Clone for Durationimpl Clone for Instantimpl Clone for SystemTimeimpl Clone for SystemTimeErrorimpl<'a> Clone for EncodeWide<'a>impl Clone for std::os::unix::net::SocketAddr