39 lines
845 B
Rust
39 lines
845 B
Rust
//@ aux-build:uninhabited.rs
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#![feature(never_type)]
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extern crate uninhabited;
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use uninhabited::{
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UninhabitedEnum,
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UninhabitedStruct,
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UninhabitedTupleStruct,
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UninhabitedVariants,
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};
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// This test checks that uninhabited non-exhaustive types cannot coerce to any type, as the never
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// type can.
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struct A;
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fn can_coerce_never_type_to_anything(x: !) -> A {
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x
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}
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fn cannot_coerce_empty_enum_to_anything(x: UninhabitedEnum) -> A {
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x //~ ERROR mismatched types
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}
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fn cannot_coerce_empty_tuple_struct_to_anything(x: UninhabitedTupleStruct) -> A {
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x //~ ERROR mismatched types
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}
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fn cannot_coerce_empty_struct_to_anything(x: UninhabitedStruct) -> A {
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x //~ ERROR mismatched types
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}
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fn cannot_coerce_enum_with_empty_variants_to_anything(x: UninhabitedVariants) -> A {
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x //~ ERROR mismatched types
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}
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fn main() {}
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