For destructuring an expression into multiple constants.

The primary feature of this crate is the multiconst macro, which destructuring an expression into multiple constants.

Example

For more examples you can look in the docs for multiconst

Basic

This example demonstrates destructuring an array (whose length is inferred) into multiple constants.

use multiconst::multiconst;

assert_eq!(A, 0b11);
assert_eq!(B, 0b111);
assert_eq!(C, 0b1111);
assert_eq!(D, 0b11111);

multiconst!{
    pub const [A, B, C, D]: [u64; _] = mersennes_from(2);
}

/// Generates all mersenne numbers (binary numbers that are all `1` bits)
/// from `start` amount of 1s up to `start + N - 1`.
const fn mersennes_from<const N: usize>(start: u32) -> [u64; N] {
    let mut out = [0; N];
    multiconst::for_range!{i in 0..N =>
        out[i] = (1 << (i as u32 + start)) - 1;
    }
    out
}

No-std support

multiconst is #![no_std], it can be used anywhere Rust can be used.

Minimum Supported Rust Version

multiconst requires Rust 1.51.0, requiring crate features to use newer language features.