File: const_constructor_qpath.rs

package info (click to toggle)
rustc-web 1.70.0%2Bdfsg1-7~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,517,036 kB
  • sloc: xml: 147,962; javascript: 10,210; sh: 8,590; python: 8,220; ansic: 5,901; cpp: 4,635; makefile: 4,006; asm: 2,856
file content (37 lines) | stat: -rw-r--r-- 623 bytes parent folder | download | duplicates (6)
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
// run-pass

trait ConstDefault {
    const DEFAULT: Self;
}

#[derive(PartialEq)]
enum E {
    V(i32),
    W(usize),
}

impl ConstDefault for E {
    const DEFAULT: Self = Self::V(23);
}

impl ConstDefault for Option<i32> {
    const DEFAULT: Self = Self::Some(23);
}

impl E {
    const NON_DEFAULT: Self = Self::W(12);
    const fn local_fn() -> Self {
        Self::V(23)
    }
}

const fn explicit_qpath() -> E {
    let _x = <Option<usize>>::Some(23);
    <E>::W(12)
}

fn main() {
    assert!(E::DEFAULT == E::local_fn());
    assert!(Option::DEFAULT == Some(23));
    assert!(E::NON_DEFAULT == explicit_qpath());
}