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
|
// edition:2021
//check-pass
#[derive(Copy, Clone)]
enum PointType {
TwoD(u32, u32),
ThreeD(u32, u32, u32)
}
// Testing tuple struct patterns
struct Points {
points: Vec<PointType>,
}
impl Points {
pub fn test1(&mut self) -> Vec<usize> {
(0..self.points.len())
.filter_map(|i| {
match self.test2(i) {
PointType::TwoD (..) => Some(i),
PointType::ThreeD (..) => None,
}
})
.collect()
}
pub fn test2(&mut self, i: usize) -> PointType {
self.points[i]
}
}
fn main() {
let mut points = Points {
points: Vec::<PointType>::new()
};
points.points.push(PointType::ThreeD(0,0,0));
points.points.push(PointType::TwoD(0,0));
points.points.push(PointType::ThreeD(0,0,1));
points.points.push(PointType::TwoD(0,1));
println!("{:?}", points.test1());
}
|
