[clang] [attributes][-Wunsafe-buffer-usage] Support adding unsafe_buffer_usage attribute to struct fields (PR #101585)

[Malavika Samak via cfe-commits]

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@@ -927,21 +927,28 @@ class CArrayToPtrAssignmentGadget : public FixableGadget {
 /// over one of its pointer parameters.
 class UnsafeBufferUsageAttrGadget : public WarningGadget {
   constexpr static const char *const OpTag = "call_expr";
-  const CallExpr *Op;
+  const Expr *Op;
 
 public:
   UnsafeBufferUsageAttrGadget(const MatchFinder::MatchResult &Result)
       : WarningGadget(Kind::UnsafeBufferUsageAttr),
-        Op(Result.Nodes.getNodeAs<CallExpr>(OpTag)) {}
+        Op(Result.Nodes.getNodeAs<Expr>(OpTag)) {}
 
   static bool classof(const Gadget *G) {
     return G->getKind() == Kind::UnsafeBufferUsageAttr;
   }
 
   static Matcher matcher() {
+    auto HasUnsafeFielDecl = 
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malavikasamak wrote:

Sounds good. I didn't want to duplicate a bunch of code here, as the only change was to the matcher. Perhaps when we extend the attribute to be added to other program locations we can separate them if necessary?

https://github.com/llvm/llvm-project/pull/101585