struct_cache_field 0.0.2

Proc macro for caching method to struct field
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

#[struct_cache_field::impl_cached_method]
impl<T> Hoge<T>
where
    T: ToString + From<String>,
{
    pub fn two_times_x(&self) -> T {
        let s = self.x.to_string();
        format!("{s}{s}").into()
    }
}

#[struct_cache_field::add_cache_field]
struct Hoge<T>
where
    T: ToString,
{
    x: u64,
    t: T,
}

fn main() {
    let mut hoge = Hoge {
        x: 1,
        t: "t".to_string(),
        __cache_fields__: Default::default(),
    };

    assert_eq!(hoge.two_times_x(), &"tt");
    assert_eq!(hoge.two_times_x(), &"tt");
    hoge.x = 2;
    assert_eq!(hoge.two_times_x(), &"tt");
}