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generic-array (0.14.7)

Published 2026-03-26 10:32:44 +00:00 by siennathesane

Installation

Set up this registry in the Cargo configuration file (for example ~/.cargo/config.toml):

[registry]
default = "gitea"

[registries.gitea]
index = "sparse+" # Sparse index
# index = "" # Git

[net]
git-fetch-with-cli = true

To install the package using Cargo, run the following command:

cargo add generic-array@0.14.7

For more information on the Cargo registry, see the documentation.

About this package

Generic types implementing functionality of arrays

generic-array

This crate implements generic array types for Rust.

Requires minumum Rust version of 1.36.0, or 1.41.0 for From<[T; N]> implementations

Documentation

Usage

The Rust arrays [T; N] are problematic in that they can't be used generically with respect to N, so for example this won't work:

struct Foo<N> {
	data: [i32; N]
}

generic-array defines a new trait ArrayLength<T> and a struct GenericArray<T, N: ArrayLength<T>>, which let the above be implemented as:

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

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

use generic_array::typenum::U5;

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

fn main() {
    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>
}

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

In version 0.1.1 an arr! macro was introduced, allowing for creation of arrays as shown below:

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

Dependencies

ID	Version
serde	^1.0
typenum	^1.12
zeroize	^1
bincode	^1.0
serde_json	^1.0
version_check	^0.9

Keywords

generic array

Details

Cargo

2026-03-26 10:32:44 +00:00

0

Bartłomiej Kamiński <fizyk20@gmail.com>

Aaron Trent <novacrazy@gmail.com>

Repository Site

Documentation Site

MIT

17 KiB

Assets (1)

generic-array-0.14.7.crate 17 KiB

Versions (1) View all

0.14.7 2026-03-26