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, 18 insertions, 0 deletions

diff --git a/src/test/ui/hr-subtype/placeholder-pattern.rs b/src/test/ui/hr-subtype/placeholder-pattern.rs
new file mode 100644
index 000000000..061e66e54
--- /dev/null
+++ b/src/test/ui/hr-subtype/placeholder-pattern.rs
@@ -0,0 +1,18 @@
+// check-pass
+// Check that higher ranked subtyping correctly works when using
+// placeholder patterns.
+fn hr_subtype<'c>(f: for<'a, 'b> fn(&'a (), &'b ())) {
+    let _: for<'a> fn(&'a (), &'a ()) = f;
+    let _: for<'a, 'b> fn(&'a (), &'b ()) = f;
+    let _: for<'a> fn(&'a (), &'c ()) = f;
+    let _: fn(&'c (), &'c ()) = f;
+}
+
+fn simple<'c>(x: (&'static i32,)) {
+    let _: (&'c i32,) = x;
+}
+
+fn main() {
+    hr_subtype(|_, _| {});
+    simple((&3,));
+}