Struct nom::lib::std::slice::IterMut

[+] Show declaration

pub struct IterMut<'a, T> where
    T: 'a + 'a,  { /* fields omitted */ }

[−] Expand description

Mutable slice iterator.

This struct is created by the iter_mut method on slices.

Examples

Basic usage:

// First, we declare a type which has `iter_mut` method to get the `IterMut`
// struct (&[usize here]):
let mut slice = &mut [1, 2, 3];

// Then, we iterate over it and increment each element value:
for element in slice.iter_mut() {
    *element += 1;
}

// We now have "[2, 3, 4]":
println!("{:?}", slice);

Methods

impl<'a, T> IterMut<'a, T>

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Important traits for &'a mut [u8]

impl<'a> Write for &'a mut [u8]impl<'a> Read for &'a [u8]

pub fn into_slice(self) -> &'a mut [T]

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View the underlying data as a subslice of the original data.

To avoid creating &mut references that alias, this is forced to consume the iterator.

Examples

Basic usage:

// First, we declare a type which has `iter_mut` method to get the `IterMut`
// struct (&[usize here]):
let mut slice = &mut [1, 2, 3];

{
    // Then, we get the iterator:
    let mut iter = slice.iter_mut();
    // We move to next element:
    iter.next();
    // So if we print what `into_slice` method returns here, we have "[2, 3]":
    println!("{:?}", iter.into_slice());
}

// Now let's modify a value of the slice:
{
    // First we get back the iterator:
    let mut iter = slice.iter_mut();
    // We change the value of the first element of the slice returned by the `next` method:
    *iter.next().unwrap() += 1;
}
// Now slice is "[2, 2, 3]":
println!("{:?}", slice);

Trait Implementations

impl<'a, T> Send for IterMut<'a, T> where     T: Send,

impl<'a, T> Debug for IterMut<'a, T> where     T: 'a + Debug,

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

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Formats the value using the given formatter.

impl<'a, T> Iterator for IterMut<'a, T>

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type Item = &'a mut T

The type of the elements being iterated over.

fn next(&mut self) -> Option<&'a mut T>

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Advances the iterator and returns the next value.

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

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Returns the bounds on the remaining length of the iterator.

fn count(self) -> usize

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Consumes the iterator, counting the number of iterations and returning it.

fn nth(&mut self, n: usize) -> Option<&'a mut T>

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Returns the nth element of the iterator.

fn last(self) -> Option<&'a mut T>

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Consumes the iterator, returning the last element.

fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R where     F: FnMut(B, <IterMut<'a, T> as Iterator>::Item) -> R,     R: Try<Ok = B>,     IterMut<'a, T>: Sized,

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An iterator method that applies a function as long as it returns successfully, producing a single, final value.

fn fold<Acc, Fold>(self, init: Acc, f: Fold) -> Acc where     Fold: FnMut(Acc, <IterMut<'a, T> as Iterator>::Item) -> Acc,

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An iterator method that applies a function, producing a single, final value.

fn position<P>(&mut self, predicate: P) -> Option<usize> where     P: FnMut(<IterMut<'a, T> as Iterator>::Item) -> bool,     IterMut<'a, T>: Sized,

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Searches for an element in an iterator, returning its index.

fn rposition<P>(&mut self, predicate: P) -> Option<usize> where     P: FnMut(<IterMut<'a, T> as Iterator>::Item) -> bool,     IterMut<'a, T>: Sized,     IterMut<'a, T>: ExactSizeIterator,     IterMut<'a, T>: DoubleEndedIterator,

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Searches for an element in an iterator from the right, returning its index.

Important traits for StepBy<I>

impl<I> Iterator for StepBy<I> where
    I: Iterator,  type Item = <I as Iterator>::Item;

fn step_by(self, step: usize) -> StepBy<Self>

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Creates an iterator starting at the same point, but stepping by the given amount at each iteration.

Important traits for Chain<A, B>

impl<A, B> Iterator for Chain<A, B> where
    A: Iterator,
    B: Iterator<Item = <A as Iterator>::Item>,  type Item = <A as Iterator>::Item;

fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter> where     U: IntoIterator<Item = Self::Item>,

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Takes two iterators and creates a new iterator over both in sequence.

Important traits for Zip<A, B>

impl<A, B> Iterator for Zip<A, B> where
    A: Iterator,
    B: Iterator,  type Item = (<A as Iterator>::Item, <B as Iterator>::Item);

fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter> where     U: IntoIterator,

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'Zips up' two iterators into a single iterator of pairs.

Important traits for Map<I, F>

impl<B, I, F> Iterator for Map<I, F> where
    F: FnMut(<I as Iterator>::Item) -> B,
    I: Iterator,  type Item = B;

fn map<B, F>(self, f: F) -> Map<Self, F> where     F: FnMut(Self::Item) -> B,

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Takes a closure and creates an iterator which calls that closure on each element.

fn for_each<F>(self, f: F) where     F: FnMut(Self::Item),

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Calls a closure on each element of an iterator.

Important traits for Filter<I, P>

impl<I, P> Iterator for Filter<I, P> where
    I: Iterator,
    P: FnMut(&<I as Iterator>::Item) -> bool,  type Item = <I as Iterator>::Item;

fn filter<P>(self, predicate: P) -> Filter<Self, P> where     P: FnMut(&Self::Item) -> bool,

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Creates an iterator which uses a closure to determine if an element should be yielded.

Important traits for FilterMap<I, F>

impl<B, I, F> Iterator for FilterMap<I, F> where
    F: FnMut(<I as Iterator>::Item) -> Option<B>,
    I: Iterator,  type Item = B;

fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F> where     F: FnMut(Self::Item) -> Option<B>,

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Creates an iterator that both filters and maps.

Important traits for Enumerate<I>

impl<I> Iterator for Enumerate<I> where
    I: Iterator,  type Item = (usize, <I as Iterator>::Item);

fn enumerate(self) -> Enumerate<Self>

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Creates an iterator which gives the current iteration count as well as the next value.

Important traits for Peekable<I>

impl<I> Iterator for Peekable<I> where
    I: Iterator,  type Item = <I as Iterator>::Item;

fn peekable(self) -> Peekable<Self>

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Creates an iterator which can use peek to look at the next element of the iterator without consuming it.

Important traits for SkipWhile<I, P>

impl<I, P> Iterator for SkipWhile<I, P> where
    I: Iterator,
    P: FnMut(&<I as Iterator>::Item) -> bool,  type Item = <I as Iterator>::Item;

fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> where     P: FnMut(&Self::Item) -> bool,

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Creates an iterator that [skip]s elements based on a predicate.

Important traits for TakeWhile<I, P>

impl<I, P> Iterator for TakeWhile<I, P> where
    I: Iterator,
    P: FnMut(&<I as Iterator>::Item) -> bool,  type Item = <I as Iterator>::Item;

fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> where     P: FnMut(&Self::Item) -> bool,

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Creates an iterator that yields elements based on a predicate.

Important traits for Skip<I>

impl<I> Iterator for Skip<I> where
    I: Iterator,  type Item = <I as Iterator>::Item;

fn skip(self, n: usize) -> Skip<Self>

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Creates an iterator that skips the first n elements.

Important traits for Take<I>

impl<I> Iterator for Take<I> where
    I: Iterator,  type Item = <I as Iterator>::Item;

fn take(self, n: usize) -> Take<Self>

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Creates an iterator that yields its first n elements.

Important traits for Scan<I, St, F>

impl<B, I, St, F> Iterator for Scan<I, St, F> where
    F: FnMut(&mut St, <I as Iterator>::Item) -> Option<B>,
    I: Iterator,  type Item = B;

fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F> where     F: FnMut(&mut St, Self::Item) -> Option<B>,

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An iterator adaptor similar to [fold] that holds internal state and produces a new iterator.

Important traits for FlatMap<I, U, F>

impl<I, U, F> Iterator for FlatMap<I, U, F> where
    F: FnMut(<I as Iterator>::Item) -> U,
    I: Iterator,
    U: IntoIterator,  type Item = <U as IntoIterator>::Item;

fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> where     F: FnMut(Self::Item) -> U,     U: IntoIterator,

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Creates an iterator that works like map, but flattens nested structure.

Important traits for Flatten<I>

impl<I, U> Iterator for Flatten<I> where
    I: Iterator,
    U: Iterator,
    <I as Iterator>::Item: IntoIterator,
    <<I as Iterator>::Item as IntoIterator>::IntoIter == U,
    <<I as Iterator>::Item as IntoIterator>::Item == <U as Iterator>::Item,  type Item = <U as Iterator>::Item;

fn flatten(self) -> Flatten<Self> where     Self::Item: IntoIterator,

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Creates an iterator that flattens nested structure.

Important traits for Fuse<I>

impl<I> Iterator for Fuse<I> where
    I: FusedIterator, impl<I> Iterator for Fuse<I> where
    I: Iterator,  type Item = <I as Iterator>::Item;

fn fuse(self) -> Fuse<Self>

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Creates an iterator which ends after the first [None].

Important traits for Inspect<I, F>

impl<I, F> Iterator for Inspect<I, F> where
    F: FnMut(&<I as Iterator>::Item),
    I: Iterator,  type Item = <I as Iterator>::Item;

fn inspect<F>(self, f: F) -> Inspect<Self, F> where     F: FnMut(&Self::Item),

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Do something with each element of an iterator, passing the value on.

Important traits for &'a mut I

impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

fn by_ref(&mut self) -> &mut Self

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Borrows an iterator, rather than consuming it.

[+] Expand attributes #[must_use = "if you really need to exhaust the iterator, consider `.for_each(drop)` instead"] fn collect<B>(self) -> B where     B: FromIterator<Self::Item>,

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Transforms an iterator into a collection.

fn partition<B, F>(self, f: F) -> (B, B) where     B: Default + Extend<Self::Item>,     F: FnMut(&Self::Item) -> bool,

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Consumes an iterator, creating two collections from it.

fn try_for_each<F, R>(&mut self, f: F) -> R where     F: FnMut(Self::Item) -> R,     R: Try<Ok = ()>,

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An iterator method that applies a fallible function to each item in the iterator, stopping at the first error and returning that error.

fn all<F>(&mut self, f: F) -> bool where     F: FnMut(Self::Item) -> bool,

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Tests if every element of the iterator matches a predicate.

fn any<F>(&mut self, f: F) -> bool where     F: FnMut(Self::Item) -> bool,

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Tests if any element of the iterator matches a predicate.

fn find<P>(&mut self, predicate: P) -> Option<Self::Item> where     P: FnMut(&Self::Item) -> bool,

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Searches for an element of an iterator that satisfies a predicate.

fn find_map<B, F>(&mut self, f: F) -> Option<B> where     F: FnMut(Self::Item) -> Option<B>,

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Applies function to the elements of iterator and returns the first non-none result.

fn max(self) -> Option<Self::Item> where     Self::Item: Ord,

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Returns the maximum element of an iterator.

fn min(self) -> Option<Self::Item> where     Self::Item: Ord,

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Returns the minimum element of an iterator.

fn max_by_key<B, F>(self, f: F) -> Option<Self::Item> where     B: Ord,     F: FnMut(&Self::Item) -> B,

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Returns the element that gives the maximum value from the specified function.

fn max_by<F>(self, compare: F) -> Option<Self::Item> where     F: FnMut(&Self::Item, &Self::Item) -> Ordering,

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Returns the element that gives the maximum value with respect to the specified comparison function.

fn min_by_key<B, F>(self, f: F) -> Option<Self::Item> where     B: Ord,     F: FnMut(&Self::Item) -> B,

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Returns the element that gives the minimum value from the specified function.

fn min_by<F>(self, compare: F) -> Option<Self::Item> where     F: FnMut(&Self::Item, &Self::Item) -> Ordering,

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Returns the element that gives the minimum value with respect to the specified comparison function.

Important traits for Rev<I>

impl<I> Iterator for Rev<I> where
    I: DoubleEndedIterator,  type Item = <I as Iterator>::Item;

fn rev(self) -> Rev<Self> where     Self: DoubleEndedIterator,

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Reverses an iterator's direction.

fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB) where     FromA: Default + Extend<A>,     FromB: Default + Extend<B>,     Self: Iterator<Item = (A, B)>,

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Converts an iterator of pairs into a pair of containers.

Important traits for Cloned<I>

impl<'a, I, T> Iterator for Cloned<I> where
    I: Iterator<Item = &'a T>,
    T: 'a + Clone,  type Item = T;

fn cloned<'a, T>(self) -> Cloned<Self> where     Self: Iterator<Item = &'a T>,     T: 'a + Clone,

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Creates an iterator which [clone]s all of its elements.

Important traits for Cycle<I>

impl<I> Iterator for Cycle<I> where
    I: Clone + Iterator,  type Item = <I as Iterator>::Item;

fn cycle(self) -> Cycle<Self> where     Self: Clone,

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Repeats an iterator endlessly.

fn sum<S>(self) -> S where     S: Sum<Self::Item>,

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Sums the elements of an iterator.

fn product<P>(self) -> P where     P: Product<Self::Item>,

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Iterates over the entire iterator, multiplying all the elements

fn cmp<I>(self, other: I) -> Ordering where     I: IntoIterator<Item = Self::Item>,     Self::Item: Ord,

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Lexicographically compares the elements of this Iterator with those of another.

fn partial_cmp<I>(self, other: I) -> Option<Ordering> where     I: IntoIterator,     Self::Item: PartialOrd<<I as IntoIterator>::Item>,

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Lexicographically compares the elements of this Iterator with those of another.

fn eq<I>(self, other: I) -> bool where     I: IntoIterator,     Self::Item: PartialEq<<I as IntoIterator>::Item>,

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Determines if the elements of this Iterator are equal to those of another.

fn ne<I>(self, other: I) -> bool where     I: IntoIterator,     Self::Item: PartialEq<<I as IntoIterator>::Item>,

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Determines if the elements of this Iterator are unequal to those of another.

fn lt<I>(self, other: I) -> bool where     I: IntoIterator,     Self::Item: PartialOrd<<I as IntoIterator>::Item>,

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Determines if the elements of this Iterator are lexicographically less than those of another.

fn le<I>(self, other: I) -> bool where     I: IntoIterator,     Self::Item: PartialOrd<<I as IntoIterator>::Item>,

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Determines if the elements of this Iterator are lexicographically less or equal to those of another.

fn gt<I>(self, other: I) -> bool where     I: IntoIterator,     Self::Item: PartialOrd<<I as IntoIterator>::Item>,

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Determines if the elements of this Iterator are lexicographically greater than those of another.

fn ge<I>(self, other: I) -> bool where     I: IntoIterator,     Self::Item: PartialOrd<<I as IntoIterator>::Item>,

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Determines if the elements of this Iterator are lexicographically greater than or equal to those of another.

impl<'a, T> DoubleEndedIterator for IterMut<'a, T>

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fn next_back(&mut self) -> Option<&'a mut T>

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Removes and returns an element from the end of the iterator.

fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R where     F: FnMut(B, <IterMut<'a, T> as Iterator>::Item) -> R,     R: Try<Ok = B>,     IterMut<'a, T>: Sized,

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This is the reverse version of [try_fold()]: it takes elements starting from the back of the iterator.

fn rfold<Acc, Fold>(self, init: Acc, f: Fold) -> Acc where     Fold: FnMut(Acc, <IterMut<'a, T> as Iterator>::Item) -> Acc,

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An iterator method that reduces the iterator's elements to a single, final value, starting from the back.

fn rfind<P>(&mut self, predicate: P) -> Option<Self::Item> where     P: FnMut(&Self::Item) -> bool,

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Searches for an element of an iterator from the back that satisfies a predicate.

impl<'a, T> TrustedLen for IterMut<'a, T>

impl<'a, T> ExactSizeIterator for IterMut<'a, T>

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fn len(&self) -> usize

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Returns the exact number of times the iterator will iterate.

fn is_empty(&self) -> bool

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🔬 This is a nightly-only experimental API. (exact_size_is_empty)

Returns whether the iterator is empty.

impl<'a, T> FusedIterator for IterMut<'a, T>

impl<'a, T> Sync for IterMut<'a, T> where     T: Sync,