enum-utils 0.1.2

A set of useful proc macros 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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70

use enum_utils::IterVariants;

#[derive(Debug, IterVariants, PartialEq, Eq)]
#[repr(u32)]
enum LargeDiscriminant {
    MaxMinusOne = 0xffff_fffe,
    Max = 0xffff_ffff,
}

#[test]
fn large_discriminant() {
    use self::LargeDiscriminant::*;

    assert_eq!(vec![MaxMinusOne, Max],
               LargeDiscriminant::iter().collect::<Vec<_>>());
}

#[derive(Debug, Clone, IterVariants, PartialEq, Eq)]
#[repr(u8)]
enum Zst {
    Singleton,
}

#[test]
fn zst() {
    assert_eq!(vec![Zst::Singleton],
               Zst::iter().collect::<Vec<_>>());
}

#[derive(Debug, IterVariants, PartialEq, Eq)]
enum Empty {}

#[test]
fn empty() {
    assert_eq!(Vec::<Empty>::new(),
               Empty::iter().collect::<Vec<Empty>>());
}

#[derive(Debug, Clone, IterVariants, PartialEq, Eq)]
#[repr(u8)]
#[allow(unused)]
enum SkipCLike {
    A,
    #[enumeration(skip)]
    B,
    C,
}

#[test]
fn skip_c_like() {
    use self::SkipCLike::*;
    assert_eq!(vec![A, C],
               SkipCLike::iter().collect::<Vec<_>>());
}

#[derive(Debug, IterVariants, PartialEq, Eq)]
#[repr(C, u16)]
#[repr(align(2))]
enum MultiRepr {
    A,
    B,
}

#[test]
fn multi_repr() {
    use self::MultiRepr::*;

    assert_eq!(vec![A, B],
               MultiRepr::iter().collect::<Vec<_>>());
}