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, 59 insertions, 0 deletions

diff --git a/src/test/ui/binding/empty-types-in-patterns.rs b/src/test/ui/binding/empty-types-in-patterns.rs
new file mode 100644
index 000000000..0d0dbcaf4
--- /dev/null
+++ b/src/test/ui/binding/empty-types-in-patterns.rs
@@ -0,0 +1,59 @@
+// run-pass
+
+#![feature(never_type, never_type_fallback)]
+#![feature(exhaustive_patterns)]
+
+#![allow(unreachable_patterns)]
+#![allow(unreachable_code)]
+#![allow(unused_variables)]
+
+#[allow(dead_code)]
+fn foo(z: !) {
+    let x: Result<!, !> = Ok(z);
+
+    let Ok(_y) = x;
+    let Err(_y) = x;
+
+    let x = [z; 1];
+
+    match x {};
+    match x {
+        [q] => q,
+    };
+}
+
+fn bar(nevers: &[!]) {
+    match nevers {
+        &[]  => (),
+    };
+
+    match nevers {
+        &[]  => (),
+        &[_]  => (),
+        &[_, _, _, ..]  => (),
+    };
+}
+
+fn main() {
+    let x: Result<u32, !> = Ok(123);
+    let Ok(y) = x;
+
+    assert_eq!(123, y);
+
+    match x {
+        Ok(y) => y,
+    };
+
+    match x {
+        Ok(y) => y,
+        Err(e) => match e {},
+    };
+
+    let x: Result<u32, &!> = Ok(123);
+    match x {
+        Ok(y) => y,
+        Err(_) => unimplemented!(),
+    };
+
+    bar(&[]);
+}