ihrwein/enum-display-derive

Derive Display for simple enums automagically

Derive Display trait for enums

Documentation

This crate can derive a Display implementation for very simple enums, like the following one:

#[macro_use]
extern crate enum_display_derive;

use std::fmt::Display;

#[derive(Display)]
enum FizzBuzz {
   Fizz,
   Buzz,
   FizzBuzz,
   Number(u64),
}

fn fb(i: u64) -> FizzBuzz {
   match (i % 3, i % 5) {
       (0, 0) => FizzBuzz::FizzBuzz,
       (0, _) => FizzBuzz::Fizz,
       (_, 0) => FizzBuzz::Buzz,
       (_, _) => FizzBuzz::Number(i),
   }
}

fn main() {
   for i in 0..100 {
       println!("{}", fb(i));
   }
}

You should see the following output:

FizzBuzz
1
2
Fizz
4
Buzz
Fizz
7
...

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT) at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.`