1 unstable release
Uses old Rust 2015
0.1.0 | Nov 24, 2018 |
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#176 in #fields
Used in e_num
8KB
220 lines
e_num
Serialize enums into numbers.
Warning
This library works with variant fields (e.g. Variant1(u64)
) by bitshifting the
number representation of the contained value over enough so that the tagging can
fit on the right of the number. If you're dealing with very large numbers in the
fields or have a ton of variants, data on the left side of the value will likely
be lost.
Usage
#[macro_use]
extern crate e_num;
use e_num::ENum;
#[derive(ENum)]
enum A {
B,
C(u64),
}
fn main() {
let b: usize = A::B.to_num();
println!("b as a number: {:#b}", b);
let b = A::from_num(b);
assert!(match b {
A::B => true,
_ => false,
});
let c = A::C(85).to_num();
println!("c as a number: {:#b}", c);
let c = A::from_num(c);
assert!(match c {
A::C(inner) => {
assert_eq!(inner, 85);
true
}
_ => false,
});
}
License
This project is licensed under the MIT license. See the LICENSE file for more details.
Dependencies
~2.5MB
~55K SLoC