diff options
Diffstat (limited to 'tests/ui/rfcs/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs')
-rw-r--r-- | tests/ui/rfcs/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/tests/ui/rfcs/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs b/tests/ui/rfcs/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs new file mode 100644 index 000000000..6b911dd98 --- /dev/null +++ b/tests/ui/rfcs/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs @@ -0,0 +1,45 @@ +#![feature(never_type)] + +#[non_exhaustive] +pub enum UninhabitedEnum { +} + +#[non_exhaustive] +pub struct UninhabitedTupleStruct(!); + +#[non_exhaustive] +pub struct UninhabitedStruct { + _priv: !, +} + +pub enum UninhabitedVariants { + #[non_exhaustive] Tuple(!), + #[non_exhaustive] Struct { x: ! } +} + +struct A; + +// This test checks that uninhabited non-exhaustive types defined in the same crate cannot coerce +// to any type, as the never type can. + +fn can_coerce_never_type_to_anything(x: !) -> A { + x +} + +fn cannot_coerce_empty_enum_to_anything(x: UninhabitedEnum) -> A { + x //~ ERROR mismatched types +} + +fn cannot_coerce_empty_tuple_struct_to_anything(x: UninhabitedTupleStruct) -> A { + x //~ ERROR mismatched types +} + +fn cannot_coerce_empty_struct_to_anything(x: UninhabitedStruct) -> A { + x //~ ERROR mismatched types +} + +fn cannot_coerce_enum_with_empty_variants_to_anything(x: UninhabitedVariants) -> A { + x //~ ERROR mismatched types +} + +fn main() {} |