Struct flatcontainer::impls::option::OptionRegion

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pub struct OptionRegion<R> { /* private fields */ }
Expand description

A region to hold Options.

§Examples

The region can hold options:

let mut r = <OptionRegion<<u8 as Containerized>::Region>>::default();

let some_index = r.push(Some(123));
// Type annotations required for `None`:
let none_index = r.push(Option::<u8>::None);

assert_eq!(Some(123), r.index(some_index));
assert_eq!(None, r.index(none_index));

Trait Implementations§

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impl<R: Clone> Clone for OptionRegion<R>

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fn clone(&self) -> OptionRegion<R>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<R: Debug> Debug for OptionRegion<R>

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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<R: Default> Default for OptionRegion<R>

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fn default() -> OptionRegion<R>

Returns the “default value” for a type. Read more
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impl<'de, R> Deserialize<'de> for OptionRegion<R>
where R: Deserialize<'de>,

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl<'a, T: 'a, TR> Push<&'a Option<T>> for OptionRegion<TR>
where TR: Region + Push<&'a T>,

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fn push(&mut self, item: &'a Option<T>) -> <OptionRegion<TR> as Region>::Index

Push item into self, returning an index that allows to look up the corresponding read item.
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impl<T, TR> Push<Option<T>> for OptionRegion<TR>
where TR: Region + Push<T>,

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fn push(&mut self, item: Option<T>) -> <OptionRegion<TR> as Region>::Index

Push item into self, returning an index that allows to look up the corresponding read item.
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impl<R: Region> Region for OptionRegion<R>

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type Owned = Option<<R as Region>::Owned>

An owned type that can be constructed from a read item.
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type ReadItem<'a> = Option<<R as Region>::ReadItem<'a>> where Self: 'a

The type of the data that one gets out of the container.
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type Index = Option<<R as Region>::Index>

The type to index into the container. Should be treated as an opaque type, even if known.
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fn merge_regions<'a>(regions: impl Iterator<Item = &'a Self> + Clone) -> Self
where Self: 'a,

Construct a region that can absorb the contents of regions in the future.
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fn index(&self, index: Self::Index) -> Self::ReadItem<'_>

Index into the container. The index must be obtained by pushing data into the container.
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fn reserve_regions<'a, I>(&mut self, regions: I)
where Self: 'a, I: Iterator<Item = &'a Self> + Clone,

Ensure that the region can absorb the items of regions without reallocation
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fn clear(&mut self)

Remove all elements from this region, but retain allocations if possible.
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fn heap_size<F: FnMut(usize, usize)>(&self, callback: F)

Heap size, size - capacity
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fn reborrow<'b, 'a: 'b>(item: Self::ReadItem<'a>) -> Self::ReadItem<'b>
where Self: 'a,

Converts a read item into one with a narrower lifetime.
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impl<'a, T: 'a, TR> ReserveItems<&'a Option<T>> for OptionRegion<TR>
where TR: Region + ReserveItems<&'a T>,

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fn reserve_items<I>(&mut self, items: I)
where I: Iterator<Item = &'a Option<T>> + Clone,

Ensure that the region can absorb items without reallocation.
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impl<R> Serialize for OptionRegion<R>
where R: Serialize,

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more

Auto Trait Implementations§

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impl<R> Freeze for OptionRegion<R>
where R: Freeze,

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impl<R> RefUnwindSafe for OptionRegion<R>
where R: RefUnwindSafe,

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impl<R> Send for OptionRegion<R>
where R: Send,

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impl<R> Sync for OptionRegion<R>
where R: Sync,

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impl<R> Unpin for OptionRegion<R>
where R: Unpin,

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impl<R> UnwindSafe for OptionRegion<R>
where R: UnwindSafe,

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<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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.
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,