Crate cartesian_array_product

cartesian-array-product

This crate provides a macro to generate an array with the cartesian product of multiple arrays.

It is meant to be usable in const contexts.

Usage

Add this crate as a dependency:

cargo add cartesian_array_product

Example

use cartesian_array_product::cartesian_array;

let product = cartesian_array!([1, 2], [3, 4]);
let expected = [
    (1, 3),
    (2, 3),
    (1, 4),
    (2, 4),
];

assert_eq!(product, expected);

See https://docs.rs/cartesian_array_product for further info.

Caveat

This macro doesn’t allow trailing commas in the input arrays. This is because $($var:whatever),* doesn’t match trailing commas, and adding manually $($var:whatever),* $(,)? is too much repetation for a thing that, honestly, isn’t that important. (maybe i’m just writing this to convience myself because i hate not having trailing commas 😭😭😭)

Macros

caf

Re-export from const_anonymous_functions. A macro for creating const anonymous functions.

cartesian_array

Takes N arrays and returns a list of N tuples with the combinations of the elements.

cartesian_array_map

Same as cartesian_array! but mapping each element.