enum-derive-2018 3.0.2

This crate provides macros for deriving additional functionality for enums.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

// Copyright (c) 2015 macro-attr contributors.
// Copyright (c) 2020 Warlock <internalmike@gmail.com>.
//
// Licensed under the MIT license (see LICENSE or <http://opensource.org
// /licenses/MIT>) or the Apache License, Version 2.0 (see LICENSE of
// <http://www.apache.org/licenses/LICENSE-2.0>), at your option. All
// files in the project carrying such notice may not be copied, modified,
// or distributed except according to those terms.

use enum_derive_2018::EnumFromStr;
use macro_attr_2018::macro_attr;

macro_attr! {
    #[derive(Debug, PartialEq, EnumFromStr!)]
    pub enum Get {
        Up,
        /// And
        Down,
        /** And */
        AllAround
    }
}

macro_attr! {
    #[derive(Debug, PartialEq, EnumFromStr!)]
    pub enum Degenerate {}
}

#[test]
fn test_next_variant() {
    use enum_derive_2018::ParseEnumError;

    assert_eq!("Up".parse(), Ok(Get::Up));
    assert_eq!("Down".parse(), Ok(Get::Down));
    assert_eq!("AllAround".parse(), Ok(Get::AllAround));
    assert_eq!("Edgy".parse::<Degenerate>(), Err(ParseEnumError));

    assert_eq!("Singularity".parse::<Degenerate>(), Err(ParseEnumError));
}