Struct PutBackN

#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
pub struct PutBackN<I: Iterator> { /* private fields */ }

An iterator adaptor that allows putting multiple items in front of the iterator.

Iterator element type is I::Item.

Implementations

impl<I: Iterator> PutBackN<I>

fn put_back(&mut self, x: I::Item)

Puts x in front of the iterator.

The values are yielded in order of the most recently put back values first.

use itertools::put_back_n;

let mut it = put_back_n(1..5);
it.next();
it.put_back(1);
it.put_back(0);

assert!(itertools::equal(it, 0..5));

Trait Implementations

impl<I> PeekingNext for PutBackN<I> where I: Iterator,

fn peeking_next<F>(&mut self, accept: F) -> Option<Self::Item>
where
    F: FnOnce(&Self::Item) -> bool,

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

fn clone(&self) -> PutBackN<I>

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

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

impl<I: Iterator> Iterator for PutBackN<I>

type Item = <I as Iterator>::Item;
fn next(&mut self) -> Option<Self::Item>
fn size_hint(&self) -> (usize, Option<usize>)
fn fold<B, F>(self, init: B, f: F) -> B
where
    F: FnMut(B, Self::Item) -> B,

Auto Trait Implementations

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

impl<I> RefUnwindSafe for PutBackN<I> where Vec<<I as Iterator>::Item>: RefUnwindSafe, I: RefUnwindSafe,

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

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

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

impl<I> UnsafeUnpin for PutBackN<I> where Vec<<I as Iterator>::Item>: UnsafeUnpin, I: UnsafeUnpin,

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

Blanket Implementations

impl<I> IntoIterator for PutBackN<I> where I: Iterator,

type Item = <I as Iterator>::Item;
type IntoIter = I;
fn into_iter(self) -> I

impl<IT> MultiUnzip<()> for PutBackN<I> where IT: Iterator<Item = ()>,

fn multiunzip(self)

impl<IT, A, FromA> MultiUnzip<(FromA,)> for PutBackN<I> where IT: Iterator<Item = (A,)>, FromA: Default + Extend<A>,

fn multiunzip(self) -> (FromA,)

impl<IT, A, FromA, B, FromB> MultiUnzip<(FromA, FromB)> for PutBackN<I> where IT: Iterator<Item = (A, B)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>,

fn multiunzip(self) -> (FromA, FromB)

impl<IT, A, FromA, B, FromB, C, FromC> MultiUnzip<(FromA, FromB, FromC)> for PutBackN<I> where IT: Iterator<Item = (A, B, C)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>, FromC: Default + Extend<C>,

fn multiunzip(self) -> (FromA, FromB, FromC)

impl<IT, A, FromA, B, FromB, C, FromC, D, FromD> MultiUnzip<(FromA, FromB, FromC, FromD)> for PutBackN<I> where IT: Iterator<Item = (A, B, C, D)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>, FromC: Default + Extend<C>, FromD: Default + Extend<D>,

fn multiunzip(self) -> (FromA, FromB, FromC, FromD)

impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE> MultiUnzip<(FromA, FromB, FromC, FromD, FromE)> for PutBackN<I> where IT: Iterator<Item = (A, B, C, D, E)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>, FromC: Default + Extend<C>, FromD: Default + Extend<D>, FromE: Default + Extend<E>,

fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE)

impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF)> for PutBackN<I> where IT: Iterator<Item = (A, B, C, D, E, F)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>, FromC: Default + Extend<C>, FromD: Default + Extend<D>, FromE: Default + Extend<E>, FromF: Default + Extend<F>,

fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF)

impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG)> for PutBackN<I> where IT: Iterator<Item = (A, B, C, D, E, F, G)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>, FromC: Default + Extend<C>, FromD: Default + Extend<D>, FromE: Default + Extend<E>, FromF: Default + Extend<F>, FromG: Default + Extend<G>,

fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG)

impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH)> for PutBackN<I> where IT: Iterator<Item = (A, B, C, D, E, F, G, H)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>, FromC: Default + Extend<C>, FromD: Default + Extend<D>, FromE: Default + Extend<E>, FromF: Default + Extend<F>, FromG: Default + Extend<G>, FromH: Default + Extend<H>,

fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH)

impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI)> for PutBackN<I> where IT: Iterator<Item = (A, B, C, D, E, F, G, H, I)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>, FromC: Default + Extend<C>, FromD: Default + Extend<D>, FromE: Default + Extend<E>, FromF: Default + Extend<F>, FromG: Default + Extend<G>, FromH: Default + Extend<H>, FromI: Default + Extend<I>,

fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI)

impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI, J, FromJ> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ)> for PutBackN<I> where IT: Iterator<Item = (A, B, C, D, E, F, G, H, I, J)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>, FromC: Default + Extend<C>, FromD: Default + Extend<D>, FromE: Default + Extend<E>, FromF: Default + Extend<F>, FromG: Default + Extend<G>, FromH: Default + Extend<H>, FromI: Default + Extend<I>, FromJ: Default + Extend<J>,

fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ)

impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI, J, FromJ, K, FromK> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK)> for PutBackN<I> where IT: Iterator<Item = (A, B, C, D, E, F, G, H, I, J, K)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>, FromC: Default + Extend<C>, FromD: Default + Extend<D>, FromE: Default + Extend<E>, FromF: Default + Extend<F>, FromG: Default + Extend<G>, FromH: Default + Extend<H>, FromI: Default + Extend<I>, FromJ: Default + Extend<J>, FromK: Default + Extend<K>,

fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK)

impl<IT, A, FromA, B, FromB, C, FromC, D, FromD, E, FromE, F, FromF, G, FromG, H, FromH, I, FromI, J, FromJ, K, FromK, L, FromL> MultiUnzip<(FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK, FromL)> for PutBackN<I> where IT: Iterator<Item = (A, B, C, D, E, F, G, H, I, J, K, L)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>, FromC: Default + Extend<C>, FromD: Default + Extend<D>, FromE: Default + Extend<E>, FromF: Default + Extend<F>, FromG: Default + Extend<G>, FromH: Default + Extend<H>, FromI: Default + Extend<I>, FromJ: Default + Extend<J>, FromK: Default + Extend<K>, FromL: Default + Extend<L>,

fn multiunzip(self) -> (FromA, FromB, FromC, FromD, FromE, FromF, FromG, FromH, FromI, FromJ, FromK, FromL)

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> CloneToUninit for PutBackN<I> where T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

impl<T> From<T> for PutBackN<I>

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> IntoEither for PutBackN<I>

impl<T> Itertools for PutBackN<I> where T: Iterator + ?Sized,

impl<T> ToOwned for PutBackN<I> where T: Clone,

type Owned = T;
fn to_owned(&self) -> T
fn clone_into(&self, target: &mut T)

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

fn into(self) -> U

Calls U::from(self).

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

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

type Error = never;
fn try_from(value: U) -> Result<T, never>

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

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