35 lines
813 B
Rust
35 lines
813 B
Rust
// Check that never patterns can't have bodies or guards.
|
|
#![feature(never_patterns)]
|
|
#![allow(incomplete_features)]
|
|
|
|
enum Void {}
|
|
|
|
fn main() {}
|
|
|
|
macro_rules! never {
|
|
() => { ! }
|
|
}
|
|
|
|
fn no_arms_or_guards(x: Void) {
|
|
match &None::<Void> {
|
|
Some(!) => {}
|
|
//~^ ERROR a never pattern is always unreachable
|
|
None => {}
|
|
}
|
|
match &None::<Void> { //~ ERROR: `&Some(!)` not covered
|
|
Some(!) if true,
|
|
//~^ ERROR guard on a never pattern
|
|
None => {}
|
|
}
|
|
match &None::<Void> { //~ ERROR: `&Some(!)` not covered
|
|
Some(!) if true => {}
|
|
//~^ ERROR a never pattern is always unreachable
|
|
None => {}
|
|
}
|
|
match &None::<Void> {
|
|
Some(never!()) => {}
|
|
//~^ ERROR a never pattern is always unreachable
|
|
None => {}
|
|
}
|
|
}
|