Struct IterMut

pub struct IterMut<'a, K, V> { /* private fields */ }

A mutable iterator over the entries of a HashMap in arbitrary order. The iterator element type is (&'a K, &'a mut V).

This struct is created by the iter_mut method on HashMap. See its documentation for more.

Examples

use hashbrown::HashMap;

let mut map: HashMap<_, _> = [(1, "One".to_owned()), (2, "Two".into())].into();

let mut iter = map.iter_mut();
iter.next().map(|(_, v)| v.push_str(" Mississippi"));
iter.next().map(|(_, v)| v.push_str(" Mississippi"));

// It is fused iterator
assert_eq!(iter.next(), None);
assert_eq!(iter.next(), None);

assert_eq!(map.get(&1).unwrap(), &"One Mississippi".to_owned());
assert_eq!(map.get(&2).unwrap(), &"Two Mississippi".to_owned());

Trait Implementations

impl<'a, K, V> Iterator for IterMut<'a, K, V>

type Item = (&'a K, &'a mut V);
fn next(&mut self) -> Option<(&'a K, &'a mut V)>
fn size_hint(&self) -> (usize, Option<usize>)
fn fold<B, F>(self, init: B, f: F) -> B
where
    Self: Sized,
    F: FnMut(B, Self::Item) -> B,

impl<K, V> Debug for IterMut<'_, K, V> where K: Debug, V: Debug,

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

impl<K, V> Default for IterMut<'_, K, V>

fn default() -> Self

impl<K, V> ExactSizeIterator for IterMut<'_, K, V>

fn len(&self) -> usize

impl<K, V> FusedIterator for IterMut<'_, K, V>

impl<K: Send, V: Send> Send for IterMut<'_, K, V>

Auto Trait Implementations

impl<'a, K, V> !UnwindSafe for IterMut<'a, K, V>

impl<'a, K, V> Freeze for IterMut<'a, K, V> where RawIter<(K, V)>: Freeze, PhantomData<(&'a K, &'a mut V)>: Freeze,

impl<'a, K, V> RefUnwindSafe for IterMut<'a, K, V> where RawIter<(K, V)>: RefUnwindSafe, PhantomData<(&'a K, &'a mut V)>: RefUnwindSafe,

impl<'a, K, V> Sync for IterMut<'a, K, V> where RawIter<(K, V)>: Sync, PhantomData<(&'a K, &'a mut V)>: Sync,

impl<'a, K, V> Unpin for IterMut<'a, K, V> where RawIter<(K, V)>: Unpin, PhantomData<(&'a K, &'a mut V)>: Unpin,

impl<'a, K, V> UnsafeUnpin for IterMut<'a, K, V> where RawIter<(K, V)>: UnsafeUnpin, PhantomData<(&'a K, &'a mut V)>: UnsafeUnpin,

Blanket Implementations

impl<I> IntoIterator for IterMut<'a, K, V> where I: Iterator,

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

impl<T> Any for IterMut<'a, K, V> where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for IterMut<'a, K, V> where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for IterMut<'a, K, V> where T: ?Sized,

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

impl<T> From<T> for IterMut<'a, K, V>

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for IterMut<'a, K, V> 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 IterMut<'a, K, V> where U: Into<T>,

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

impl<T, U> TryInto<U> for IterMut<'a, K, V> where U: TryFrom<T>,

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