enve/README.md

# enve

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

Look at the [examples](https://github.com/pleshevskiy/enve/tree/main/examples)
to see the power!

All standard environment variable types are included, but `enve` under the hood
uses [estring](https://github.com/pleshevskiy/estring), so you can easily create
your own type.

## Getting started

```rust
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(())
}
```

## Installation

The MSRV is 1.39.0

Add `enve = { version = "0.1", features = ["prim", "vec"] }` as a dependency in
`Cargo.toml`.

`Cargo.toml` example:

```toml
[package]
name = "my-crate"
version = "0.1.0"
authors = ["Me <user@rust-lang.org>"]

[dependencies]
enve = { version = "0.1", features = ["prim", "vec"] }
```

## License

**MIT**. See [LICENSE](https://github.com/pleshevskiy/estring/LICENSE) to see
the full text.

## Contributors

[pleshevskiy](https://github.com/pleshevskiy) (Dmitriy Pleshevskiy) – creator,
maintainer.