Trait Freeze

pub unsafe auto trait Freeze { }

🔬This is a nightly-only experimental API. (freeze)

Used to determine whether a type contains any UnsafeCell internally, but not through an indirection. This affects, for example, whether a static of that type is placed in read-only static memory or writable static memory. This can be used to declare that a constant with a generic type will not contain interior mutability, and subsequently allow placing the constant behind references.

Safety

This trait is a core part of the language, it is just expressed as a trait in libcore for convenience. Do not implement it for other types.

Implementors

impl<T> !Freeze for UnsafeCell<T>

where T: ?Sized,

impl<T> Freeze for *const T

where T: ?Sized,

impl<T> Freeze for *mut T

where T: ?Sized,

impl<T> Freeze for &T

where T: ?Sized,

impl<T> Freeze for &mut T

where T: ?Sized,

impl<T> Freeze for NonZero<T>

where T: ZeroablePrimitive + Freeze,

impl<T> Freeze for PhantomData<T>

where T: ?Sized,

Auto implementors

impl !Freeze for AtomicBool

impl !Freeze for AtomicI8

impl !Freeze for AtomicI16

impl !Freeze for AtomicI32

impl !Freeze for AtomicI64

impl !Freeze for AtomicIsize

impl !Freeze for AtomicU8

impl !Freeze for AtomicU16

impl !Freeze for AtomicU32

impl !Freeze for AtomicU64

impl !Freeze for AtomicUsize

impl Freeze for AsciiChar

impl Freeze for no_std_compat::cmp::Ordering

impl Freeze for Infallible

impl Freeze for c_void

impl Freeze for no_std_compat::fmt::Alignment

impl Freeze for FpCategory

impl Freeze for IntErrorKind

impl Freeze for SearchStep

impl Freeze for no_std_compat::sync::atomic::Ordering

impl Freeze for AllocError

impl Freeze for Layout

impl Freeze for LayoutError

impl Freeze for TypeId

impl Freeze for CpuidResult

impl Freeze for __m128

impl Freeze for __m128bh

impl Freeze for __m128d

impl Freeze for __m128h

impl Freeze for __m128i

impl Freeze for __m256

impl Freeze for __m256bh

impl Freeze for __m256d

impl Freeze for __m256h

impl Freeze for __m256i

impl Freeze for __m512

impl Freeze for __m512bh

impl Freeze for __m512d

impl Freeze for __m512h

impl Freeze for __m512i

impl Freeze for bf16

impl Freeze for TryFromSliceError

impl Freeze for no_std_compat::ascii::EscapeDefault

impl Freeze for BorrowError

impl Freeze for BorrowMutError

impl Freeze for CharTryFromError

impl Freeze for DecodeUtf16Error

impl Freeze for no_std_compat::char::EscapeDebug

impl Freeze for no_std_compat::char::EscapeDefault

impl Freeze for no_std_compat::char::EscapeUnicode

impl Freeze for ParseCharError

impl Freeze for ToLowercase

impl Freeze for ToUppercase

impl Freeze for TryFromCharError

impl Freeze for CStr

impl Freeze for FromBytesUntilNulError

impl Freeze for FromBytesWithNulError

impl Freeze for Error

impl Freeze for SipHasher

impl Freeze for Assume

impl Freeze for ParseFloatError

impl Freeze for ParseIntError

impl Freeze for TryFromIntError

impl Freeze for RangeFull

impl Freeze for no_std_compat::ptr::Alignment

impl Freeze for ParseBoolError

impl Freeze for Utf8Error

impl Freeze for LocalWaker

impl Freeze for RawWaker

impl Freeze for RawWakerVTable

impl Freeze for Waker

impl Freeze for Duration

impl Freeze for TryFromFloatSecsError

impl Freeze for PhantomPinned

impl<'a> Freeze for Utf8Pattern<'a>

impl<'a> Freeze for no_std_compat::ffi::c_str::Bytes<'a>

impl<'a> Freeze for Arguments<'a>

impl<'a> Freeze for Formatter<'a>

impl<'a> Freeze for EscapeAscii<'a>

impl<'a> Freeze for CharSearcher<'a>

impl<'a> Freeze for no_std_compat::str::Bytes<'a>

impl<'a> Freeze for CharIndices<'a>

impl<'a> Freeze for Chars<'a>

impl<'a> Freeze for EncodeUtf16<'a>

impl<'a> Freeze for no_std_compat::str::EscapeDebug<'a>

impl<'a> Freeze for no_std_compat::str::EscapeDefault<'a>

impl<'a> Freeze for no_std_compat::str::EscapeUnicode<'a>

impl<'a> Freeze for Lines<'a>

impl<'a> Freeze for LinesAny<'a>

impl<'a> Freeze for SplitAsciiWhitespace<'a>

impl<'a> Freeze for SplitWhitespace<'a>

impl<'a> Freeze for Utf8Chunk<'a>

impl<'a> Freeze for Utf8Chunks<'a>

impl<'a> Freeze for Context<'a>

impl<'a> Freeze for ContextBuilder<'a>

impl<'a, 'b> Freeze for DebugList<'a, 'b>

impl<'a, 'b> Freeze for DebugMap<'a, 'b>

impl<'a, 'b> Freeze for DebugSet<'a, 'b>

impl<'a, 'b> Freeze for DebugStruct<'a, 'b>

impl<'a, 'b> Freeze for DebugTuple<'a, 'b>

impl<'a, 'b> Freeze for CharSliceSearcher<'a, 'b>

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

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

impl<'a, 'f> Freeze for VaList<'a, 'f>

impl<'a, A> Freeze for no_std_compat::option::Iter<'a, A>

impl<'a, A> Freeze for no_std_compat::option::IterMut<'a, A>

impl<'a, F> Freeze for CharPredicateSearcher<'a, F>

where F: Freeze,

impl<'a, I> Freeze for ByRefSized<'a, I>

impl<'a, P> Freeze for MatchIndices<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, P> Freeze for Matches<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, P> Freeze for RMatchIndices<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, P> Freeze for RMatches<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, P> Freeze for no_std_compat::str::RSplit<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, P> Freeze for no_std_compat::str::RSplitN<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, P> Freeze for RSplitTerminator<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, P> Freeze for no_std_compat::str::Split<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, P> Freeze for no_std_compat::str::SplitInclusive<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, P> Freeze for no_std_compat::str::SplitN<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, P> Freeze for SplitTerminator<'a, P>

where <P as Pattern>::Searcher<'a>: Freeze,

impl<'a, T> Freeze for no_std_compat::result::Iter<'a, T>

impl<'a, T> Freeze for no_std_compat::result::IterMut<'a, T>

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

impl<'a, T> Freeze for ChunksExact<'a, T>

impl<'a, T> Freeze for ChunksExactMut<'a, T>

impl<'a, T> Freeze for ChunksMut<'a, T>

impl<'a, T> Freeze for no_std_compat::slice::Iter<'a, T>

impl<'a, T> Freeze for no_std_compat::slice::IterMut<'a, T>

impl<'a, T> Freeze for RChunks<'a, T>

impl<'a, T> Freeze for RChunksExact<'a, T>

impl<'a, T> Freeze for RChunksExactMut<'a, T>

impl<'a, T> Freeze for RChunksMut<'a, T>

impl<'a, T> Freeze for Windows<'a, T>

impl<'a, T, P> Freeze for ChunkBy<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for ChunkByMut<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for no_std_compat::slice::RSplit<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for RSplitMut<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for no_std_compat::slice::RSplitN<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for RSplitNMut<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for no_std_compat::slice::Split<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for no_std_compat::slice::SplitInclusive<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for SplitInclusiveMut<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for SplitMut<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for no_std_compat::slice::SplitN<'a, T, P>

where P: Freeze,

impl<'a, T, P> Freeze for SplitNMut<'a, T, P>

where P: Freeze,

impl<'a, T, const N: usize> Freeze for no_std_compat::slice::ArrayChunks<'a, T, N>

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

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

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

impl<'b, T> Freeze for Ref<'b, T>

where T: ?Sized,

impl<'b, T> Freeze for RefMut<'b, T>

where T: ?Sized,

impl<'f> Freeze for VaListImpl<'f>

impl<A> Freeze for Repeat<A>

where A: Freeze,

impl<A> Freeze for RepeatN<A>

where A: Freeze,

impl<A> Freeze for no_std_compat::option::IntoIter<A>

where A: Freeze,

impl<A, B> Freeze for Chain<A, B>

where A: Freeze, B: Freeze,

impl<A, B> Freeze for Zip<A, B>

where A: Freeze, B: Freeze,

impl<B, C> Freeze for ControlFlow<B, C>

where C: Freeze, B: Freeze,

impl<Dyn> Freeze for DynMetadata<Dyn>

where Dyn: ?Sized,

impl<F> Freeze for no_std_compat::fmt::FromFn<F>

where F: Freeze,

impl<F> Freeze for PollFn<F>

where F: Freeze,

impl<F> Freeze for no_std_compat::iter::FromFn<F>

where F: Freeze,

impl<F> Freeze for OnceWith<F>

where F: Freeze,

impl<F> Freeze for RepeatWith<F>

where F: Freeze,

impl<H> Freeze for BuildHasherDefault<H>

impl<I> Freeze for DecodeUtf16<I>

where I: Freeze,

impl<I> Freeze for Cloned<I>

where I: Freeze,

impl<I> Freeze for Copied<I>

where I: Freeze,

impl<I> Freeze for Cycle<I>

where I: Freeze,

impl<I> Freeze for Enumerate<I>

where I: Freeze,

impl<I> Freeze for Flatten<I>

where <<I as Iterator>::Item as IntoIterator>::IntoIter: Freeze, I: Freeze,

impl<I> Freeze for Fuse<I>

where I: Freeze,

impl<I> Freeze for Intersperse<I>

where <I as Iterator>::Item: Sized + Freeze, I: Freeze,

impl<I> Freeze for Peekable<I>

where I: Freeze, <I as Iterator>::Item: Freeze,

impl<I> Freeze for Skip<I>

where I: Freeze,

impl<I> Freeze for StepBy<I>

where I: Freeze,

impl<I> Freeze for Take<I>

where I: Freeze,

impl<I, F> Freeze for FilterMap<I, F>

where I: Freeze, F: Freeze,

impl<I, F> Freeze for Inspect<I, F>

where I: Freeze, F: Freeze,

impl<I, F> Freeze for Map<I, F>

where I: Freeze, F: Freeze,

impl<I, F, const N: usize> Freeze for MapWindows<I, F, N>

where F: Freeze, I: Freeze, <I as Iterator>::Item: Freeze,

impl<I, G> Freeze for IntersperseWith<I, G>

where G: Freeze, <I as Iterator>::Item: Freeze, I: Freeze,

impl<I, P> Freeze for Filter<I, P>

where I: Freeze, P: Freeze,

impl<I, P> Freeze for MapWhile<I, P>

where I: Freeze, P: Freeze,

impl<I, P> Freeze for SkipWhile<I, P>

where I: Freeze, P: Freeze,

impl<I, P> Freeze for TakeWhile<I, P>

where I: Freeze, P: Freeze,

impl<I, St, F> Freeze for Scan<I, St, F>

where I: Freeze, F: Freeze, St: Freeze,

impl<I, U, F> Freeze for FlatMap<I, U, F>

where <U as IntoIterator>::IntoIter: Freeze, I: Freeze, F: Freeze,

impl<I, const N: usize> Freeze for no_std_compat::iter::ArrayChunks<I, N>

where I: Freeze, <I as Iterator>::Item: Freeze,

impl<Idx> Freeze for Range<Idx>

where Idx: Freeze,

impl<Idx> Freeze for RangeFrom<Idx>

where Idx: Freeze,

impl<Idx> Freeze for RangeInclusive<Idx>

where Idx: Freeze,

impl<Idx> Freeze for RangeTo<Idx>

where Idx: Freeze,

impl<Idx> Freeze for RangeToInclusive<Idx>

where Idx: Freeze,

impl<Ptr> Freeze for Pin<Ptr>

where Ptr: Freeze,

impl<T> !Freeze for Cell<T>

impl<T> !Freeze for OnceCell<T>

impl<T> !Freeze for RefCell<T>

impl<T> !Freeze for SyncUnsafeCell<T>

impl<T> !Freeze for AtomicPtr<T>

impl<T> Freeze for Bound<T>

where T: Freeze,

impl<T> Freeze for Option<T>

where T: Freeze,

impl<T> Freeze for Poll<T>

where T: Freeze,

impl<T> Freeze for Reverse<T>

where T: Freeze,

impl<T> Freeze for AsyncDropInPlace<T>

where <T as AsyncDestruct>::AsyncDestructor: Freeze, T: ?Sized,

impl<T> Freeze for Pending<T>

impl<T> Freeze for Ready<T>

where T: Freeze,

impl<T> Freeze for Empty<T>

impl<T> Freeze for Once<T>

where T: Freeze,

impl<T> Freeze for Rev<T>

where T: Freeze,

impl<T> Freeze for Discriminant<T>

where <T as DiscriminantKind>::Discriminant: Freeze,

impl<T> Freeze for ManuallyDrop<T>

where T: Freeze + ?Sized,

impl<T> Freeze for Saturating<T>

where T: Freeze,

impl<T> Freeze for Wrapping<T>

where T: Freeze,

impl<T> Freeze for Yeet<T>

where T: Freeze,

impl<T> Freeze for NonNull<T>

where T: ?Sized,

impl<T> Freeze for no_std_compat::result::IntoIter<T>

where T: Freeze,

impl<T> Freeze for Exclusive<T>

where T: Freeze + ?Sized,

impl<T> Freeze for MaybeUninit<T>

where T: Freeze,

impl<T, E> Freeze for Result<T, E>

where T: Freeze, E: Freeze,

impl<T, F = fn() -> T> !Freeze for LazyCell<T, F>

impl<T, F> Freeze for Successors<T, F>

where F: Freeze, T: Freeze,

impl<T, const N: usize> Freeze for no_std_compat::array::IntoIter<T, N>

where T: Freeze,

impl<Y, R> Freeze for CoroutineState<Y, R>

where Y: Freeze, R: Freeze,

impl<const N: usize> Freeze for GetManyMutError<N>