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-rw-r--r--tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions.rs38
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diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions.rs
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+++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions.rs
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+// aux-build:uninhabited.rs
+#![feature(never_type)]
+
+extern crate uninhabited;
+
+use uninhabited::{
+ UninhabitedEnum,
+ UninhabitedStruct,
+ UninhabitedTupleStruct,
+ UninhabitedVariants,
+};
+
+// This test checks that uninhabited non-exhaustive types cannot coerce to any type, as the never
+// type can.
+
+struct A;
+
+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() {}