tests/ui/pattern/usefulness/slice_of_empty.rs


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

// revisions: min_exhaustive_patterns exhaustive_patterns
#![cfg_attr(exhaustive_patterns, feature(exhaustive_patterns))]
#![cfg_attr(min_exhaustive_patterns, feature(min_exhaustive_patterns))]
//[min_exhaustive_patterns]~^ WARN the feature `min_exhaustive_patterns` is incomplete
#![feature(never_type)]
#![deny(unreachable_patterns)]

fn main() {}

fn foo(nevers: &[!]) {
    match nevers {
        //[min_exhaustive_patterns]~^ ERROR non-exhaustive patterns: `&[_, ..]` not covered
        &[] => (),
    };

    match nevers {
        &[] => (),
        &[_] => (),
        &[_, _, ..] => (),
    };

    match nevers {
        //[exhaustive_patterns]~^ ERROR non-exhaustive patterns: `&[]` not covered
        //[min_exhaustive_patterns]~^^ ERROR non-exhaustive patterns: `&[]` and `&[_, _, ..]` not covered
        &[_] => (),
    };
}