58 lines
1.1 KiB
Markdown
58 lines
1.1 KiB
Markdown
|
# EString
|
|||
|
|
|
|||
|
|
A simple way to parse a string using type annotations.
|
|||
|
|
|
|||
|
|
This package was originally designed for [enve]
|
|||
|
|
|
|||
|
|
[enve]: https://github.com/pleshevskiy/itconfig-rs/tree/redesign
|
|||
|
|
|
|||
|
|
## Getting started
|
|||
|
|
|
|||
|
|
```rust
|
|||
|
|
use estring::{SepVec, EString};
|
|||
|
|
|
|||
|
|
type PlusVec<T> = SepVec<T, '+'>;
|
|||
|
|
type MulVec<T> = SepVec<T, '*'>;
|
|||
|
|
|
|||
|
|
fn main() -> Result<(), estring::ParseError> {
|
|||
|
|
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 use custom types as annotations! Just implement `TryFrom<EString>`!
|
|||
|
|
|
|||
|
|
## Installation
|
|||
|
|
|
|||
|
|
**The MSRV is 1.51.0**
|
|||
|
|
|
|||
|
|
Add `estring = { version = "0.1", features = ["vec", "number"] }` 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]
|
|||
|
|
estring = { version = "0.1", features = ["vec", "number"] }
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
## License
|
|||
|
|
|
|||
|
|
**MIT**. See [LICENSE](./LICENSE) to see the full text.
|
|||
|
|
|
|||
|
|
## Contributors
|
|||
|
|
|
|||
|
|
[pleshevskiy](https://github.com/pleshevskiy) (Dmitriy Pleshevskiy) – creator,
|
|||
|
|
maintainer.
|