diff options
Diffstat (limited to 'tests/ui/pattern/usefulness/always-inhabited-union-ref.rs')
-rw-r--r-- | tests/ui/pattern/usefulness/always-inhabited-union-ref.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tests/ui/pattern/usefulness/always-inhabited-union-ref.rs b/tests/ui/pattern/usefulness/always-inhabited-union-ref.rs new file mode 100644 index 000000000..7d1cac8a4 --- /dev/null +++ b/tests/ui/pattern/usefulness/always-inhabited-union-ref.rs @@ -0,0 +1,32 @@ +// The precise semantics of inhabitedness with respect to unions and references is currently +// undecided. This test file currently checks a conservative choice. + +#![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() {} |