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, 45 insertions, 0 deletions

diff --git a/src/test/ui/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs b/src/test/ui/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs
new file mode 100644
index 000000000..6b911dd98
--- /dev/null
+++ b/src/test/ui/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs
@@ -0,0 +1,45 @@
+#![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() {}