Trait Freeze 

pub unsafe auto trait Freeze { }

🔬This is a nightly-only experimental API. (freeze #121675)

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: PointeeSized> !Freeze for UnsafeCell<T>

impl<T: PointeeSized> Freeze for *const T

impl<T: PointeeSized> Freeze for *mut T

impl<T: PointeeSized> Freeze for &T

impl<T: PointeeSized> Freeze for &mut T

impl<T: PointeeSized> Freeze for PhantomData<T>

Auto implementors

impl !Freeze for AtomicBool

impl !Freeze for AtomicU8

impl !Freeze for AtomicU16

impl !Freeze for AtomicU32

impl !Freeze for AtomicU64

impl !Freeze for AtomicUsize

impl<T> !Freeze for Cell<T>

impl<T> !Freeze for RefCell<T>

impl Freeze for core::cmp::Ordering

impl Freeze for Infallible

impl Freeze for FromBytesWithNulError

impl Freeze for c_void

impl Freeze for AtomicOrdering

impl Freeze for IntErrorKind

impl Freeze for OneSidedRangeBound

impl Freeze for SearchStep

impl Freeze for core::sync::atomic::Ordering

impl Freeze for bool

impl Freeze for char

impl Freeze for f32

impl Freeze for f64

impl Freeze for i8

impl Freeze for i16

impl Freeze for i32

impl Freeze for i64

impl Freeze for i128

impl Freeze for isize

impl Freeze for !

impl Freeze for str

impl Freeze for u8

impl Freeze for u16

impl Freeze for u32

impl Freeze for u64

impl Freeze for u128

impl Freeze for ()

impl Freeze for usize

impl Freeze for Layout

impl Freeze for TypeId

impl Freeze for float16x4_t

impl Freeze for float16x8_t

impl Freeze for float32x2_t

impl Freeze for float32x4_t

impl Freeze for float64x1_t

impl Freeze for float64x1x2_t

impl Freeze for float64x1x3_t

impl Freeze for float64x1x4_t

impl Freeze for float64x2_t

impl Freeze for float64x2x2_t

impl Freeze for float64x2x3_t

impl Freeze for float64x2x4_t

impl Freeze for int8x8_t

impl Freeze for int8x16_t

impl Freeze for int16x4_t

impl Freeze for int16x8_t

impl Freeze for int32x2_t

impl Freeze for int32x4_t

impl Freeze for int64x1_t

impl Freeze for int64x2_t

impl Freeze for poly8x8_t

impl Freeze for poly8x16_t

impl Freeze for poly16x4_t

impl Freeze for poly16x8_t

impl Freeze for poly64x1_t

impl Freeze for poly64x2_t

impl Freeze for uint8x8_t

impl Freeze for uint8x16_t

impl Freeze for uint16x4_t

impl Freeze for uint16x8_t

impl Freeze for uint32x2_t

impl Freeze for uint32x4_t

impl Freeze for uint64x1_t

impl Freeze for uint64x2_t

impl Freeze for TryFromSliceError

impl Freeze for BorrowError

impl Freeze for BorrowMutError

impl Freeze for CharTryFromError

impl Freeze for DecodeUtf16Error

impl Freeze for CStr

impl Freeze for ParseIntError

impl Freeze for TryFromIntError

impl Freeze for RangeFull

impl Freeze for Alignment

impl Freeze for Utf8Error

impl Freeze for Duration

impl Freeze for TryFromFloatSecsError

impl<'a> Freeze for Location<'a>

impl<'a> Freeze for PanicInfo<'a>

impl<'a> Freeze for PanicMessage<'a>

impl<'a> Freeze for PanicArguments<'a>

impl<'a> Freeze for Bytes<'a>

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

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

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

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

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 core::slice::Iter<'a, T>

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

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

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

where T: ?Sized,

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

where T: ?Sized,

impl<A> Freeze for core::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 FromFn<F>

where F: Freeze,

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 Enumerate<I>

where I: 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 Map<I, F>

where I: Freeze, F: Freeze,

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

where I: Freeze, P: 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<Ret, T> Freeze for fn(T₁, T₂, …, Tₙ) -> Ret

impl<T> Freeze for Bound<T>

where T: Freeze,

impl<T> Freeze for Option<T>

where T: Freeze,

impl<T> Freeze for [T]

where T: Freeze,

impl<T> Freeze for (T₁, T₂, …, Tₙ)

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 NonZero<T>

where <T as ZeroablePrimitive>::NonZeroInner: Freeze,

impl<T> Freeze for NonNull<T>

where T: ?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, const N: usize> Freeze for [T; N]

where T: Freeze,

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

where T: Freeze,

impl<T, const N: usize> Freeze for [MaybeUninit<T>; N]

where T: Freeze,