# Trait PinCoerceUnsized

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    pub unsafe trait PinCoerceUnsized { }

🔬This is a nightly-only experimental API. (`pin_coerce_unsized_trait` #123430)
Expand description

Trait that indicates that this is a pointer or a wrapper for one, where unsizing can be performed on the pointee when it is pinned.

## §Safety

If this type implements `Deref`, then the concrete type returned by `deref` and `deref_mut` must not change without a modification. The following operations are not considered modifications:

- Moving the pointer.
- Performing unsizing coercions on the pointer.
- Performing dynamic dispatch with the pointer.
- Calling `deref` or `deref_mut` on the pointer.

The concrete type of a trait object is the type that the vtable corresponds to. The concrete type of a slice is an array of the same element type and the length specified in the metadata. The concrete type of a sized type is the type itself.

## Implementors§

1.33.0 · Source§

### impl<'a, T> PinCoerceUnsized for &'a T
where T: ?Sized,

1.33.0 · Source§

### impl<'a, T> PinCoerceUnsized for &'a mut T
where T: ?Sized,

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### impl<'b, T> PinCoerceUnsized for Ref<'b, T>
where T: ?Sized,

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### impl<'b, T> PinCoerceUnsized for RefMut<'b, T>
where T: ?Sized,

1.33.0 · Source§

### impl<T> PinCoerceUnsized for *const T
where T: ?Sized,

1.33.0 · Source§

### impl<T> PinCoerceUnsized for *mut T
where T: ?Sized,

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### impl<T> PinCoerceUnsized for Cell<T>
where T: ?Sized,

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### impl<T> PinCoerceUnsized for RefCell<T>
where T: ?Sized,

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### impl<T> PinCoerceUnsized for SyncUnsafeCell<T>
where T: ?Sized,

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### impl<T> PinCoerceUnsized for UnsafeCell<T>
where T: ?Sized,

1.33.0 · Source§

### impl<T> PinCoerceUnsized for NonNull<T>
where T: ?Sized,

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### impl<T> PinCoerceUnsized for UniqueArc<T>
where T: ?Sized,

1.33.0 · Source§

### impl<T> PinCoerceUnsized for Pin<T>
where T: PinCoerceUnsized,

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### impl<T, A> PinCoerceUnsized for Box<T, A>
where A: Allocator, T: ?Sized,

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### impl<T, A> PinCoerceUnsized for Rc<T, A>
where A: Allocator, T: ?Sized,

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### impl<T, A> PinCoerceUnsized for UniqueRc<T, A>
where A: Allocator, T: ?Sized,

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### impl<T, A> PinCoerceUnsized for std::rc::Weak<T, A>
where A: Allocator, T: ?Sized,

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### impl<T, A> PinCoerceUnsized for Arc<T, A>
where A: Allocator, T: ?Sized,

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### impl<T, A> PinCoerceUnsized for std::sync::Weak<T, A>
where A: Allocator, T: ?Sized,