[clang] [clang][ptrauth] Add support for querying the ptrauth schema of a type (PR #138482)

[Oliver Hunt via cfe-commits]

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@@ -9561,6 +9561,41 @@ class PointerExprEvaluator
     return true;
   }
 
+  bool VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E) {
+    // This is the only UETT we evaluate here.
+    assert(E->getKind() == UETT_PtrAuthSchemaOptions &&
+           "Unknown UnaryExprOrTypeTraitExpr");
+
+    // Note for review: there are other UETTs down the road
+    // that make a switch make sense, but for now this is the only
+    // one should this just be an
+    //   if (E->getKind() != UETT_PtrAuthSchemaOptions)
+    //     return false;
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ojhunt wrote:

- [ ] todo

https://github.com/llvm/llvm-project/pull/138482