enve

[dependencies]
enve = "0.1"

enve helps you work with environment variables and convert it to any type using only type annotations.

All standard environment variable types are included, but enve under the hood uses estring, so you can easily create your own type.

Documentation

Look at the examples to see the power!

Usage

use enve::SepVec;

type MinusVec<T> = SepVec<T, '-'>;
type PlusVec<T> = SepVec<T, '+'>;
type MulVec<T> = SepVec<T, '*'>;

fn main() -> Result<(), enve::Error> {
    enve::sset("E", "10+5*2-3");

    let res: f32 = enve::get::<PlusVec<MinusVec<MulVec<f32>>>>("E")
        .unwrap()
        .iter()
        .map(|p| {
            p.iter()
                .map(|m| m.iter().product::<f32>())
                .reduce(|acc, v| acc - v)
                .unwrap_or_default()
        })
        .sum::<f32>();

    println!("result: {}", res);

    Ok(())
}

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License

MIT. See LICENSE to see the full text.

Contributors

pleshevskiy (Dmitriy Pleshevskiy) – creator, maintainer.