array-concat

Macros for concatenating const arrays.

To add to your Cargo.toml:

array-concat = "0.3.0"

Basic Usage

concat_arrays!(<comma-seperated arrays>, <copyable value to be used for array initialization>)

Example

use array_concat::*;

const A: [u32; 3] = [1, 2, 3];
const B: [u32; 2] = [4, 5];
const C: [u32; concat_arrays_size!(A, B)] = concat_arrays!(A, B; u32::MIN); // compiles

// Non-Copy struct
struct S {}
const D: [S; 1] = [S{}];
const E: [S; 1] = [S{}];
const F: [S; concat_arrays_size!(D, E)] = concat_arrays!(D, E; S{}); // doesn't compile

fn main() {
    let c = concat_arrays!(A, B; u32::MIN);
    assert_eq!(C[..], A.iter().chain(&B).copied().collect::<Vec<u32>>()[..]);
    assert_eq!(c[..], A.iter().chain(&B).copied().collect::<Vec<u32>>()[..]);
}