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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
# enum-as-inner
A deriving proc-macro for generating functions to automatically give access to the inner members of enum.
## Basic unnamed field case
The basic case is meant for single item enums, like:
```rust
use enum_as_inner::EnumAsInner;
#[derive(Debug, EnumAsInner)]
enum OneEnum {
One(u32),
}
```
where the inner item can be retrieved with the `as_*()`/`as_*_mut()` or with the `into_*()` functions:
```rust
let one = OneEnum::One(1);
assert_eq!(*one.as_one().unwrap(), 1);
assert_eq!(one.into_one().unwrap(), 1);
let mut one = OneEnum::One(2);
assert_eq!(*one.as_one().unwrap(), 1);
assert_eq!(*one.as_one_mut().unwrap(), 1);
assert_eq!(one.into_one().unwrap(), 1);
```
where the result is either a reference for inner items or a tuple containing the inner items.
## Unit case
This will return true if enum's variant matches the expected type
```rust
use enum_as_inner::EnumAsInner;
#[derive(EnumAsInner)]
enum UnitVariants {
Zero,
One,
Two,
}
let unit = UnitVariants::Two;
assert!(unit.is_two());
```
## Mutliple, unnamed field case
This will return a tuple of the inner types:
```rust
use enum_as_inner::EnumAsInner;
#[derive(Debug, EnumAsInner)]
enum ManyVariants {
One(u32),
Two(u32, i32),
Three(bool, u32, i64),
}
```
And can be accessed like:
```rust
let mut many = ManyVariants::Three(true, 1, 2);
assert_eq!(many.as_three().unwrap(), (&true, &1_u32, &2_i64));
assert_eq!(many.as_three_mut().unwrap(), (&mut true, &mut 1_u32, &mut 2_i64));
assert_eq!(many.into_three().unwrap(), (true, 1_u32, 2_i64));
```
## Multiple, named field case
This will return a tuple of the inner types, like the unnamed option:
```rust
use enum_as_inner::EnumAsInner;
#[derive(Debug, EnumAsInner)]
enum ManyVariants {
One{ one: u32 },
Two{ one: u32, two: i32 },
Three{ one: bool, two: u32, three: i64 },
}
```
And can be accessed like:
```rust
let mut many = ManyVariants::Three{ one: true, two: 1, three: 2 };
assert_eq!(many.as_three().unwrap(), (&true, &1_u32, &2_i64));
assert_eq!(many.as_three_mut().unwrap(), (&mut true, &mut 1_u32, &mut 2_i64));
assert_eq!(many.into_three().unwrap(), (true, 1_u32, 2_i64));
```
|
