Struct NestedRef

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pub struct NestedRef<'a, Inner, Outer>
where Inner: 'static,
{ /* private fields */ }
Expand description

A nested std::cell::Ref. Useful for chaining borrows with std::cell::RefCell.

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impl<'a, Inner, Outer> NestedRef<'a, Inner, Outer>
where Inner: 'static,

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pub fn map( outer: Ref<'a, Outer>, borrow_fn: impl FnOnce(&Outer) -> Ref<'_, Inner>, ) -> Self

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pub fn filter_map( outer: Ref<'a, Outer>, borrow_fn: impl FnOnce(&Outer) -> Option<Ref<'_, Inner>>, ) -> Option<Self>

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impl<Inner, Outer> Deref for NestedRef<'_, Inner, Outer>
where Inner: 'static,

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type Target = Inner

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.

Auto Trait Implementations§

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impl<'a, Inner, Outer> Freeze for NestedRef<'a, Inner, Outer>

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impl<'a, Inner, Outer> !RefUnwindSafe for NestedRef<'a, Inner, Outer>

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impl<'a, Inner, Outer> !Send for NestedRef<'a, Inner, Outer>

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impl<'a, Inner, Outer> !Sync for NestedRef<'a, Inner, Outer>

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impl<'a, Inner, Outer> Unpin for NestedRef<'a, Inner, Outer>

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impl<'a, Inner, Outer> !UnwindSafe for NestedRef<'a, Inner, Outer>

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.