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 *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 core::cmp::Ordering

impl Freeze for Infallible

impl Freeze for AtomicOrdering

impl Freeze for OneSidedRangeBound

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

impl Freeze for bool

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 TryFromSliceError

impl Freeze for TryFromIntError

impl Freeze for RangeFull

impl Freeze for Alignment

impl Freeze for Utf8Error

impl Freeze for AtomicU32

impl Freeze for Duration

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

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

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

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

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

where A: Freeze,

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

where C: Freeze, B: Freeze,

impl<Dyn> Freeze for DynMetadata<Dyn>

where Dyn: ?Sized,

impl<I> Freeze for Cloned<I>

where I: Freeze,

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

where I: Freeze, F: 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 UnsafeCell<T>

where T: Freeze + ?Sized,

impl<T> Freeze for ManuallyDrop<T>

where T: Freeze + ?Sized,

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,