28 lines
697 B
Rust
28 lines
697 B
Rust
|
// Check that never patterns require the feature gate.
|
||
|
|
use std::ptr::NonNull;
|
||
|
|
|
||
|
|
enum Void {}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
let res: Result<u32, Void> = Ok(0);
|
||
|
|
let (Ok(_x) | Err(&!)) = res.as_ref();
|
||
|
|
//~^ ERROR `!` patterns are experimental
|
||
|
|
//~| ERROR: is not bound in all patterns
|
||
|
|
|
||
|
|
unsafe {
|
||
|
|
let ptr: *const Void = NonNull::dangling().as_ptr();
|
||
|
|
match *ptr {
|
||
|
|
! => {} //~ ERROR `!` patterns are experimental
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check that the gate operates even behind `cfg`.
|
||
|
|
#[cfg(FALSE)]
|
||
|
|
unsafe {
|
||
|
|
let ptr: *const Void = NonNull::dangling().as_ptr();
|
||
|
|
match *ptr {
|
||
|
|
! => {} //~ ERROR `!` patterns are experimental
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|