Trait DerefPure

pub unsafe trait DerefPure { }

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

Available on crate feature std only.

Perma-unstable marker trait. Indicates that the type has a well-behaved Deref (and, if applicable, DerefMut) implementation. This is relied on for soundness of deref patterns.

FIXME(deref_patterns): The precise semantics are undecided; the rough idea is that successive calls to deref/deref_mut without intermediate mutation should be idempotent, in the sense that they return the same value as far as pattern-matching is concerned. Calls to deref/deref_mut must leave the pointer itself likewise unchanged.

Implementors

impl DerefPure for Cow<'_, str>

Available on non-no_global_oom_handling only.

impl DerefPure for String

impl DerefPure for ByteString

impl DerefPure for ByteStr

impl<Ptr> DerefPure for Pin<Ptr>

where Ptr: DerefPure,

impl<T> DerefPure for Cow<'_, [T]>

where T: Clone,

Available on non-no_global_oom_handling only.

impl<T> DerefPure for Cow<'_, T>

where T: Clone,

impl<T> DerefPure for &T

where T: ?Sized,

impl<T> DerefPure for &mut T

where T: ?Sized,

impl<T> DerefPure for Ref<'_, T>

where T: ?Sized,

impl<T> DerefPure for RefMut<'_, T>

where T: ?Sized,

impl<T> DerefPure for ManuallyDrop<T>

where T: ?Sized,

impl<T, A> DerefPure for Box<T, A>

where A: Allocator, T: ?Sized,

impl<T, A> DerefPure for Rc<T, A>

where A: Allocator, T: ?Sized,

impl<T, A> DerefPure for UniqueRc<T, A>

where A: Allocator, T: ?Sized,

impl<T, A> DerefPure for Arc<T, A>

where A: Allocator, T: ?Sized,

impl<T, A> DerefPure for Vec<T, A>

where A: Allocator,