Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/test/ui/rfc-2008-non-exhaustive/uninhabited/coercions.rs b/src/test/ui/rfc-2008-non-exhaustive/uninhabited/coercions.rs
new file mode 100644
index 000000000..80b9dc4c1
--- /dev/null
+++ b/src/test/ui/rfc-2008-non-exhaustive/uninhabited/coercions.rs
@@ -0,0 +1,38 @@
+// 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() {}