A simple way to parse a string using type annotations.
Go to file
Dmitriy Pleshevskiy 8814c6ef14
chore: cleanup unused imports
2022-07-28 14:42:51 +03:00
.github/workflows bump msrv 2022-07-25 13:31:13 +03:00
.vim . 2022-07-23 22:36:22 +03:00
examples agg: add product struct 2022-07-28 10:09:41 +00:00
src chore: cleanup unused imports 2022-07-28 14:42:51 +03:00
.gitignore chore: change repository 2022-07-23 23:02:15 +03:00
Cargo.lock bump version 2022-07-28 14:37:00 +03:00
Cargo.toml bump version 2022-07-28 14:37:00 +03:00
LICENSE . 2022-07-23 22:36:22 +03:00
README.md bump version 2022-07-28 14:37:00 +03:00

README.md

EString

Crates.io docs.rs GitHub Workflow Status The MSRV

[dependencies]
estring = "0.3"

A simple way to parse a string using type annotations.

This package was originally designed for enve.

Documentation

For more details, see examples.

Usage

Basic

use estring::EString;

fn main() -> estring::Result<()> {
    let res: i32 = EString::from("10").parse()?;
    assert_eq!(res, 10);
    Ok(())
}

You can use predefined structs like SepVec if you enable the structs feature.

Note: You can use custom types as annotations! Just implement ParseFragment!

use estring::{SepVec, EString};

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

fn main() -> estring::Result<()> {
    let res = EString::from("10+5*2+3")
        .parse::<PlusVec<MulVec<f32>>>()?
        .iter()
        .map(|m| m.iter().product::<f32>())
        .sum::<f32>();

    assert_eq!(res, 23.0);
    Ok(())
}

You can also use predefined aggregators if you enable the aggs feature.

use estring::{Aggregate, EString, Product, SepVec, Sum};

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

fn main() -> estring::Result<()> {
    let res = EString::from("10+5*2+3")
        .parse::<Sum<PlusVec<Product<MulVec<f32>>>>>()?
        .agg();

    assert_eq!(res, 23.0);
    Ok(())
}

Contact Us

Join us in:

Matrix

License

MIT. See LICENSE to see the full text.

Contributors

pleshevskiy (Dmitriy Pleshevskiy) creator, maintainer.