whichever 0.7.1

Implements a trait for an enum by forwarding to whichever variant it holds
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

//! A rejected `#[dispatch]` on an impl block keeps the block, so its other
//! methods resolve and the one error stands alone.
struct Circle;

#[whichever::dispatch]
enum Shape {
    Circle(Circle),
}

#[whichever::dispatch(Shape)]
impl Shape {
    pub fn plain(&self) -> u32 {
        2
    }
}

fn main() {
    let _ = Shape::Circle(Circle).plain();
}