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#![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() {}
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