fix: add parenthesis for or-pattern

Author: roife

src/tools/rust-analyzer/crates/hir-def/src/body/pretty.rs

@@ -599,12 +599,14 @@ impl Printer<'_> {
                 w!(self, ")");
             }
             Pat::Or(pats) => {
+                w!(self, "(");
                 for (i, pat) in pats.iter().enumerate() {
                     if i != 0 {
                         w!(self, " | ");
                     }
                     self.print_pat(*pat);
                 }
+                w!(self, ")");
             }
             Pat::Record { path, args, ellipsis } => {
                 match path {

src/tools/rust-analyzer/crates/ide/src/hover/tests.rs

@@ -8743,7 +8743,6 @@ fn foo() {
     );
 }
 
-
 #[test]
 fn test_hover_function_with_pat_param() {
     check(
@@ -8856,4 +8855,20 @@ fn test_hover_function_with_pat_param() {
             ```
         "#]],
     );
+
+    // Test case with Enum and Or pattern
+    check(
+        r#"enum MyEnum { A(i32), B(i32) } fn test_8$0((MyEnum::A(x) | MyEnum::B(x)): MyEnum) {}"#,
+        expect![[r#"
+            *test_8*
+
+            ```rust
+            test
+            ```
+
+            ```rust
+            fn test_8((MyEnum::A(x) | MyEnum::B(x)): MyEnum)
+            ```
+        "#]],
+    );
 }