[][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.


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:

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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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>, 

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

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