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Ref

Struct Ref 

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pub struct Ref<'a, T> { /* private fields */ }
Expand description

A borrowed handle: a view of an object owned by something else.

The C ABI hands out interior pointers for struct fields and vector elements (&self->field, &self->vec[i]). Those must never be freed, so they cannot be represented by the owning handle types, which all implement Drop. Ref wraps one in ManuallyDrop and ties it to the parent’s lifetime, so it neither frees nor outlives its owner.

Derefs to the underlying type, so it is used exactly like &T.

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impl<T: Debug> Debug for Ref<'_, T>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<T> Deref for Ref<'_, T>

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type Target = T

The resulting type after dereferencing.
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fn deref(&self) -> &T

Dereferences the value.

Auto Trait Implementations§

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impl<'a, T> Freeze for Ref<'a, T>
where T: Freeze,

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impl<'a, T> RefUnwindSafe for Ref<'a, T>
where T: RefUnwindSafe,

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impl<'a, T> Send for Ref<'a, T>
where T: Send + Sync,

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impl<'a, T> Sync for Ref<'a, T>
where T: Sync,

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impl<'a, T> Unpin for Ref<'a, T>
where T: Unpin,

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impl<'a, T> UnsafeUnpin for Ref<'a, T>
where T: UnsafeUnpin,

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impl<'a, T> UnwindSafe for Ref<'a, T>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

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type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)
The target type on which the method may be called.
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.