================
@@ -697,10 +697,46 @@ static TemplateParamInfo convertTemplateArgToInfo(const 
clang::Decl *D,
   return TemplateParamInfo(Str);
 }
 
+// Check if the DeclKind is one for which we support contextual relationships.
+// There might be other ContextDecls, like blocks, that we currently don't
+// handle at all.
+static bool isSupportedContext(Decl::Kind DeclKind) {
+  switch (DeclKind) {
+  case Decl::Kind::Record:
+  case Decl::Kind::CXXRecord:
+  case Decl::Kind::ClassTemplateSpecialization:
+  case Decl::Kind::ClassTemplatePartialSpecialization:
+  case Decl::Kind::Namespace:
+    return true;
+  default:
+    return false;
+  }
+}
+
+template <typename T> static void findParent(Info &I, const T *D) {
----------------
ilovepi wrote:

Actually, does this need to be a template? Aren't all the things passed in here 
`clangDecl`? IIRC all types that can be cast to `DeclContext` should also be 
`Decl`.  Besides, `getKind()` is a `Decl` method.

https://github.com/llvm/llvm-project/pull/173297
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