enum-from-str-rs

Allow derive FromStr for enums

Overview

This library adds the #[derive(FromStr)] attribute for enums, thus allowing parsing strings into enum variants. Even though there are other libraries that allows this, like enum_derive, it only allows you to parse from strings with the exact name of a variant. This library allows you to define a custom string for each enum variant.

Basic usage

```rust use enumfromstr::ParseEnumVariantError; use enumfromstr_derive::FromStr;

[derive(FromStr)]

enum SomeEnum { #[fromstr="foo"] Foo, Bar, // equals to #[fromstr="Bar"] }

fn example() { "foo".parse::().unwrap(); "Bar".parse::().unwrap(); } ```

Known issues

Currently, proc-macro crates doesn't allow exporting anything other than the proc-macro function. That's why ParseEnumVariantError is in a different crate. When Rust allows it, it should be moved into a single crate.