devela 0.28.0

A development substrate of coherence.
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

# use devela::macro_derive_with;
macro_rules! derive_name {
    (
        $(#[$meta:meta])*
        $vis:vis struct $Name:ident;
    ) => {
        impl $Name {
            pub const NAME: &'static str = stringify!($Name);
        }
    };
}

#[macro_derive_with(derive_name)]
struct Thing1;

let _ = Thing1;
assert_eq!(Thing1::NAME, "Thing1");

macro_rules! derive_value {
    (
        #[macro_derive_args($value:expr)]
        $(#[$meta:meta])*
        $vis:vis struct $Name:ident;
    ) => {
        impl $Name {
            pub const VALUE: usize = $value;
        }
    };
}

#[macro_derive_with(derive_value)]
#[macro_derive_args(7 * 6)]
struct Thing2;

assert_eq!(Thing2::VALUE, 42);

macro_rules! derive_label {
    (
        ($label:literal)
        $(#[$meta:meta])*
        $vis:vis struct $Name:ident;
    ) => {
        impl $Name {
            pub const LABEL: &'static str = $label;
        }
    };
}

#[macro_derive_with(derive_label("direct"))]
struct Thing3;

assert_eq!(Thing3::LABEL, "direct");