Rollup merge of #68842 - Centril:issue-68785, r=estebank

or_patterns: add regression test for #68785

Fixes https://github.com/rust-lang/rust/issues/68785.

(Fixed by https://github.com/rust-lang/rust/pull/67668.)

cc https://github.com/rust-lang/rust/issues/54883
r? @estebank

src/test/ui/or-patterns/issue-68785-irrefutable-param-with-at.rs

@@ -0,0 +1,14 @@
+// check-pass
+
+#![feature(or_patterns)]
+
+enum MyEnum {
+    FirstCase(u8),
+    OtherCase(u16),
+}
+
+fn my_fn(x @ (MyEnum::FirstCase(_) | MyEnum::OtherCase(_)): MyEnum) {}
+
+fn main() {
+    my_fn(MyEnum::FirstCase(0));
+}