34 lines
726 B
Rust
34 lines
726 B
Rust
//@ revisions: normal exhaustive_patterns
|
|
|
|
// The precise semantics of inhabitedness with respect to unions and references is currently
|
|
// undecided. This test file currently checks a conservative choice.
|
|
|
|
#![cfg_attr(exhaustive_patterns, feature(exhaustive_patterns))]
|
|
#![feature(never_type)]
|
|
#![allow(dead_code)]
|
|
#![allow(unreachable_code)]
|
|
|
|
pub union Foo {
|
|
foo: !,
|
|
}
|
|
|
|
fn uninhab_ref() -> &'static ! {
|
|
unimplemented!()
|
|
}
|
|
|
|
fn uninhab_union() -> Foo {
|
|
unimplemented!()
|
|
}
|
|
|
|
fn match_on_uninhab() {
|
|
match uninhab_ref() {
|
|
//~^ ERROR non-exhaustive patterns: type `&!` is non-empty
|
|
}
|
|
|
|
match uninhab_union() {
|
|
//~^ ERROR non-exhaustive patterns: type `Foo` is non-empty
|
|
}
|
|
}
|
|
|
|
fn main() {}
|