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# enum-utils
[](https://crates.io/crates/enum-utils)
[](https://docs.rs/enum-utils)
[](https://dev.azure.com/ecstaticmorse/enum-utils/_build/latest?definitionId=1&branchName=master)
A set of procedural macros for deriving useful functionality on enums.
See [the API docs] for more information.
[the API docs]: https://docs.rs/enum-utils
## [`FromStr`]
An efficient, configurable [`FromStr`][from-str-std] implementation for C-like enums.
[`FromStr`]: https://docs.rs/enum-utils/0.1.1/enum_utils/derive.FromStr.html
[from-str-std]: https://doc.rust-lang.org/std/str/trait.FromStr.html
```rust
#[derive(Debug, PartialEq, enum_utils::FromStr)]
enum Test {
Alpha,
Beta,
}
assert_eq!("Alpha".parse(), Ok(Test::Alpha));
assert_eq!("Beta".parse(), Ok(Test::Beta));
```
## [`IterVariants`]
A static method returning an iterator over the variants of an enum.
[`IterVariants`]: https://docs.rs/enum-utils/0.1.1/enum_utils/derive.IterVariants.html
```rust
#[derive(Debug, PartialEq, Eq, enum_utils::IterVariants)]
#[repr(u8)]
pub enum Direction {
North = 1,
East,
South,
West,
}
use Direction::*;
assert_eq!(Direction::iter().collect::<Vec<_>>(), vec![North, East, South, West]);
```
## [`TryFromRepr`] and [`ReprFrom`]
Conversion to and from the discriminant of a C-like enum.
[`ReprFrom`]: https://docs.rs/enum-utils/0.1.1/enum_utils/derive.ReprFrom.html
[`TryFromRepr`]: https://docs.rs/enum-utils/0.1.1/enum_utils/derive.TryFromRepr.html
```rust
use std::convert::TryInto;
#[derive(Debug, Clone, Copy, PartialEq, Eq, enum_utils::ReprFrom, enum_utils::TryFromRepr)]
#[repr(u8)]
pub enum Direction {
North = 1,
East,
South,
West
}
use Direction::*;
assert_eq!(1u8, North.into());
assert_eq!(4u8, West.into());
assert_eq!(North, 1u8.try_into().unwrap());
assert_eq!(West, 4u8.try_into().unwrap());
```
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