Atomize

Elixir style atoms for Rust

From Elixir: An atom is a constant whose value is its own name. Some other languages call these symbols. They are often useful to enumerate over distinct values.

Creating an Atom

use atomize::{a, Atom};

fn main() {
    // `a!(apple)` will always create the same value
    let apple: Atom = a!(apple);

    assert_eq!(apple, a!(apple));
}

Atom Equality

Atoms are compared in O(1) time. In fact, they compile to simple u64 and so are compared in a single x64 operation

assert_eq!(a!(orange), a!(orange));
assert_ne!(a!(orange), a!(apple));

Mixing

Atoms can also be mixed

let apple_and_orange = a!(apple) + a!(orange);

assert_eq!(apple_and_orange, a!(orange) + a!(apple));