Crate generic_array[][src]

Expand description

This crate implements a structure that can be used as a generic array type. Core Rust array types [T; N] can’t be used generically with respect to N, so for example this:

struct Foo<T, N> {
    data: [T; N]

won’t work.

generic-array exports a GenericArray<T,N> type, which lets the above be implemented as:

use generic_array::{ArrayLength, GenericArray};

struct Foo<T, N: ArrayLength<T>> {
    data: GenericArray<T,N>

The ArrayLength<T> trait is implemented by default for unsigned integer types from typenum:

use generic_array::typenum::U5;

struct Foo<N: ArrayLength<i32>> {
    data: GenericArray<i32, N>

let foo = Foo::<U5>{data: GenericArray::default()};

For example, GenericArray<T, U5> would work almost like [T; 5]:

use generic_array::typenum::U5;

struct Foo<T, N: ArrayLength<T>> {
    data: GenericArray<T, N>

let foo = Foo::<i32, U5>{data: GenericArray::default()};

For ease of use, an arr! macro is provided - example below:

let array = arr![u32; 1, 2, 3];
assert_eq!(array[2], 3);


pub extern crate typenum;
pub use self::iter::GenericArrayIter;


Implementation for arr! macro.

Functional programming with generic sequences

GenericArray iterator implementation.

Useful traits for manipulating sequences of data stored in GenericArrays


Macro allowing for easy generation of Generic Arrays. Example: let test = arr![u32; 1, 2, 3];


Struct representing a generic array - GenericArray<T, N> works like [T; N]


Trait making GenericArray work, marking types to be used as length of an array