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#39 in #repr
4KB
byte-enum
A ByteEnum
derive macro and trait to implement Into<u8>
and TryFrom<u8>
for a #[repr(u8)]
enum. Simple as.
The enum must be #[repr(u8)]
, fieldless, and may not have explicit discriminants.
use byte_enum::ByteEnum;
#[derive(ByteEnum)]
#[repr(u8)]
enum SomeEnum {
VariantA,
VariantB,
VariantC,
}
let b: u8 = SomeEnum::VariantB.into();
assert_eq!(b, 1);
let c = SomeEnum::try_from(2_u8);
assert_eq!(c, Ok(SomeEnum::VariantC));
let d = SomeEnum::try_from(4_u8);
assert!(d.is_err());
License
byte-enum may be used under your choice of the Apache 2 or MIT license.
Dependencies
~1.5MB
~36K SLoC