File: no-eq-branch-fail.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg2-3
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 893,176 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (22 lines) | stat: -rw-r--r-- 431 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
struct NoEq;

enum Foo {
    Bar,
    Baz,
    Qux(NoEq),
}

// Even though any of these values can be compared structurally, we still disallow it in a pattern
// because `Foo` does not impl `PartialEq`.
const BAR_BAZ: Foo = if 42 == 42 {
    Foo::Baz
} else {
    Foo::Bar
};

fn main() {
    match Foo::Qux(NoEq) {
        BAR_BAZ => panic!(), //~ ERROR constant of non-structural type `Foo` in a pattern
        _ => {}
    }
}