VarIter

variter is a Rust crate that exports some simple tools for iterating over enum types with zero or more variants that have no fields.

use variter::{VarIter, derive_var_iter};
derive_var_iter! {
    #[derive(Debug)]
    enum Greeting {
        Hello,
        Hola,
        Bonjour,
    }
}

fn main() {
    for greeting in Greeting::ALL_VARIANTS {
        println!("{:?}", greeting);
    }
}

If you're familiar with the Swift language, it's similar to using the compiler-synthesized CaseIterable protocol conformance.

See the module documentation for more information!

Usage

Add variter as a dependency in your Cargo.toml file:

[dependencies]
# ...
variter = "0.2"

Features

• foreign_impls (default): include implementions of VarIter on stable core types.
• std (default): if foreign_impls is turned on, VarIter implementations are included for stable std types.

no_std Support

Given the simplicity of the crate, no_std support can be toggled through the default-features = false flag in your Cargo.toml dependency table.

[dependencies]
# ...
variter = { version = "0.2", default-features = false }

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.