pub struct ChunkBy<K, I, F>
where I: Iterator,
{ inner: RefCell<GroupInner<K, I, F>>, index: Cell<usize>, }
Expand description

ChunkBy is the storage for the lazy grouping operation.

If the groups are consumed in their original order, or if each group is dropped without keeping it around, then ChunkBy uses no allocations. It needs allocations only if several group iterators are alive at the same time.

This type implements IntoIterator (it is not an iterator itself), because the group iterators need to borrow from this value. It should be stored in a local variable or temporary and iterated.

See .chunk_by() for more information.

Fields§

§inner: RefCell<GroupInner<K, I, F>>§index: Cell<usize>

Implementations§

source§

impl<K, I, F> ChunkBy<K, I, F>
where I: Iterator,

source

fn step(&self, client: usize) -> Option<I::Item>
where F: FnMut(&I::Item) -> K, K: PartialEq,

client: Index of group that requests next element

source

fn drop_group(&self, client: usize)

client: Index of group

Trait Implementations§

source§

impl<'a, K, I, F> IntoIterator for &'a ChunkBy<K, I, F>
where I: Iterator, I::Item: 'a, F: FnMut(&I::Item) -> K, K: PartialEq,

§

type Item = (K, Group<'a, K, I, F>)

The type of the elements being iterated over.
§

type IntoIter = Groups<'a, K, I, F>

Which kind of iterator are we turning this into?
source§

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more

Auto Trait Implementations§

§

impl<K, I, F> !Freeze for ChunkBy<K, I, F>

§

impl<K, I, F> !RefUnwindSafe for ChunkBy<K, I, F>

§

impl<K, I, F> Send for ChunkBy<K, I, F>
where F: Send, I: Send, K: Send, <I as Iterator>::Item: Send,

§

impl<K, I, F> !Sync for ChunkBy<K, I, F>

§

impl<K, I, F> Unpin for ChunkBy<K, I, F>
where F: Unpin, I: Unpin, K: Unpin, <I as Iterator>::Item: Unpin,

§

impl<K, I, F> UnwindSafe for ChunkBy<K, I, F>

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

source§

fn into(self) -> U

Calls U::from(self).

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

source§

impl<T> IntoEither for T

source§

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
source§

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
source§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

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

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.