Struct itertools::kmerge_impl::HeadTail

source ·
struct HeadTail<I>
where I: Iterator,
{ head: I::Item, tail: I, }
Expand description

Head element and Tail iterator pair

PartialEq, Eq, PartialOrd and Ord are implemented by comparing sequences based on first items (which are guaranteed to exist).

The meanings of PartialOrd and Ord are reversed so as to turn the heap used in KMerge into a min-heap.

Fields§

§head: I::Item§tail: I

Implementations§

source§

impl<I> HeadTail<I>
where I: Iterator,

source

fn new(it: I) -> Option<Self>

Constructs a HeadTail from an Iterator. Returns None if the Iterator is empty.

source

fn next(&mut self) -> Option<I::Item>

Get the next element and update head, returning the old head in Some.

Returns None when the tail is exhausted (only head then remains).

source

fn size_hint(&self) -> (usize, Option<usize>)

Hints at the size of the sequence, same as the Iterator method.

Trait Implementations§

source§

impl<I> Clone for HeadTail<I>
where I: Iterator + Clone, I::Item: Clone,

source§

fn clone(&self) -> Self

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
source§

impl<I> Debug for HeadTail<I>
where I: Iterator + Debug, I::Item: Debug,

source§

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

§

impl<I> Freeze for HeadTail<I>
where <I as Iterator>::Item: Freeze, I: Freeze,

§

impl<I> RefUnwindSafe for HeadTail<I>

§

impl<I> Send for HeadTail<I>
where <I as Iterator>::Item: Send, I: Send,

§

impl<I> Sync for HeadTail<I>
where <I as Iterator>::Item: Sync, I: Sync,

§

impl<I> Unpin for HeadTail<I>
where <I as Iterator>::Item: Unpin, I: Unpin,

§

impl<I> UnwindSafe for HeadTail<I>
where <I as Iterator>::Item: UnwindSafe, I: UnwindSafe,

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> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. 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.