[clang] [Clang] Properly parse enumeration declarations with fixed underlying type in generic associations (PR #210353)

[Aaron Ballman via cfe-commits]

================
@@ -290,6 +290,21 @@ namespace clang {
     }
   };
 
+  class GenericAssociationTypeRAIIObject {
+    Parser &P;
+    bool OldVal;
+
+  public:
+    GenericAssociationTypeRAIIObject(Parser &p, bool Value = true)
+        : P(p), OldVal(P.ParsingGenericAssociationType) {
----------------
AaronBallman wrote:

```suggestion
    GenericAssociationTypeRAIIObject(Parser &P, bool Value = true)
        : P(P), OldVal(P.ParsingGenericAssociationType) {
```

https://github.com/llvm/llvm-project/pull/210353