[−][src]Trait generic_array::sequence::Shorten

pub unsafe trait Shorten<T>: Sized + GenericSequence<T> {
    type Shorter: Lengthen<T, Longer = Self>;
    fn pop_back(self) -> (Self::Shorter, T);

    fn pop_front(self) -> (T, Self::Shorter);
}

Defines a GenericSequence which can be shortened by removing the first or last element from it.

Additionally, any shortened sequence can be lengthened by appending or prepending an element to it.

Associated Types

type Shorter: Lengthen<T, Longer = Self>

GenericSequence that has one less element than Self

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Required methods

fn pop_back(self) -> (Self::Shorter, T)

Returns a new array without the last element, and the last element.

Example:

ⓘThis example is not tested
let a = arr![i32; 1, 2, 3, 4];

let (init, last) = a.pop_back();

assert_eq!(init, arr![i32; 1, 2, 3]);
assert_eq!(last, 4);

fn pop_front(self) -> (T, Self::Shorter)

Returns a new array without the first element, and the first element. Example:

ⓘThis example is not tested
let a = arr![i32; 1, 2, 3, 4];

let (head, tail) = a.pop_front();

assert_eq!(head, 1);
assert_eq!(tail, arr![i32; 2, 3, 4]);
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Implementors

impl<T, N: ArrayLength<T>> Shorten<T> for GenericArray<T, N> where
    N: Sub<B1>,
    Sub1<N>: ArrayLength<T>,
    Sub1<N>: Add<B1, Output = N>,
    Add1<Sub1<N>>: ArrayLength<T>, [src]

type Shorter = GenericArray<T, Sub1<N>>

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