enumkit

enumkit provides traits and utilities for working with enums that consist only of unit variants. It works hand-in-hand with its companion crate, enumkit_derive, which provides #[derive(EnumValues)] and #[derive(EnumMapping)] proc macros.

Features

• EnumValues: Automatically enumerate all variants of a unit enum.
• EnumMapping<T>: Efficiently associate values with enum variants using a static-sized array.
• serde (optional): Enables Serialize and Deserialize derives for mapping types.

Usage

Add the crate to your Cargo.toml:

[dependencies]
enumkit = "<version>"

Then derive traits for your enum:

use enumkit::{EnumValues, EnumMapping};

#[derive(EnumValues, EnumMapping, Debug, Clone, Copy, PartialEq, Eq, Hash)]
enum State {
    Start,
    Middle,
    End,
}

fn main() {
    // EnumValues usage
    for variant in State::values() {
        println!("{:?}", variant);
    }

    // EnumMapping usage
    let mut map = StateMapping::new(|s| format!("{:?}", s));
    assert_eq!(map.get(State::Middle), "Middle");
}

Feature Flags

• serde: Enables Serialize and Deserialize for mapping structs.

License

MIT or Apache-2.0