Experimental: Derive FromStr impl based on regex provided via attribute
Add the following in your Cargo.toml:
[dependencies]
adhoc_derive = "0.1.1"
lazy_static = "1.2.0"
regex = "1.1.0"
Then, you can derive a std::str::FromStr impl as follows:
```
use adhoc_derive::FromStr;
struct Rectangle { id: usize, x: usize, y: usize, width: usize, height: usize, }
let rect: Rectangle = "#123 @ 3,2: 5x4".parse().unwrap(); asserteq!(123, rect.id); asserteq!(3, rect.x); asserteq!(2, rect.y); asserteq!(5, rect.width); assert_eq!(4, rect.height); ```
In general, each field of the struct needs to implement std::str::FromStr and each field identifier needs to correspond to a named capture group in the regex.
For a more comprehensive guide, refer to GUIDE.md
This crate is experimental and has a lot of rough edges. In no particular order:
* Only works on structs with named fields (i.e no enums, tuple structs, etc.)
* Doesn't work with generic structs out of the box (it should work if you add the required trait bounds yourself)
* Not yet implemented: optional patterns, i.e. (...)? => Option<...>
* Not yet implemented: repeating patterns, i.e. (...)* => Vec<...>
* Error handling and especially reporting is basically non-existent
* Provided regex is not validated at compile-time