A set of procedural macros for deriving useful functionality on enums.
See the API docs for more information.
An efficient, configurable FromStr implementation for C-like enums.
#[derive(Debug, PartialEq, enum_utils::FromStr)]
enum Test {
Alpha,
Beta,
}
assert_eq!("Alpha".parse(), Ok(Test::Alpha));
assert_eq!("Beta".parse(), Ok(Test::Beta));A static method returning an iterator over the variants of an enum.
#[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.
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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