car

macro based array manipulation constant techniques

you wanted a quick LUT in const? here you go!

// please note that this is in no way performant or a good idea.
let squares: [usize; 0xffffffff] = car::from_fn!(|i| i * 2);

completely stable!

for once!

lib.rs:

provides some (map and from_fn) core::array fn related functions as const macros.

const X: [usize; 6] = car::map!(car::from_fn!(|x| x), |x| x * 24);