# 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: ?Sized> PinCoerceUnsized for &'a T

1.33.0 · Source§

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

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

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

1.33.0 · Source§

### impl<T: PointeeSized> PinCoerceUnsized for NonNull<T>

1.33.0 · Source§

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

1.33.0 · Source§

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

1.33.0 · Source§

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

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

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

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

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