52 lines
1.3 KiB
Rust
52 lines
1.3 KiB
Rust
#![feature(never_type)]
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#[non_exhaustive]
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pub enum UninhabitedEnum {
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}
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#[non_exhaustive]
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pub struct UninhabitedStruct {
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_priv: !,
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}
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#[non_exhaustive]
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pub struct UninhabitedTupleStruct(!);
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pub enum UninhabitedVariants {
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#[non_exhaustive] Tuple(!),
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#[non_exhaustive] Struct { x: ! }
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}
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pub struct IndirectUninhabitedEnum(UninhabitedEnum);
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pub struct IndirectUninhabitedStruct(UninhabitedStruct);
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pub struct IndirectUninhabitedTupleStruct(UninhabitedTupleStruct);
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pub struct IndirectUninhabitedVariants(UninhabitedVariants);
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struct A;
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// This test checks that an empty match on a non-exhaustive uninhabited type through a level of
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// indirection from the defining crate will not compile without `#![feature(exhaustive_patterns)]`.
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fn cannot_empty_match_on_empty_enum_to_anything(x: IndirectUninhabitedEnum) -> A {
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match x {} //~ ERROR non-exhaustive patterns
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}
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fn cannot_empty_match_on_empty_struct_to_anything(x: IndirectUninhabitedStruct) -> A {
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match x {} //~ ERROR non-exhaustive patterns
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}
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fn cannot_empty_match_on_empty_tuple_struct_to_anything(x: IndirectUninhabitedTupleStruct) -> A {
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match x {} //~ ERROR non-exhaustive patterns
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}
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fn cannot_empty_match_on_enum_with_empty_variants_struct_to_anything(
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x: IndirectUninhabitedVariants,
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) -> A {
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match x {} //~ ERROR non-exhaustive patterns
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}
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fn main() {}
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