[PATCH] D60543: [clang] Update isDerivedFrom to support Objective-C classes 🔍

[Stephane Moore via Phabricator via cfe-commits]

stephanemoore marked 3 inline comments as done.
stephanemoore added inline comments.


================
Comment at: clang/lib/ASTMatchers/ASTMatchFinder.cpp:820
+  llvm::DenseMap<const ObjCInterfaceDecl *,
+                 std::set<const ObjCCompatibleAliasDecl *>>
+      CompatibleAliases;
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aaron.ballman wrote:
> gribozavr wrote:
> > `unordered_set`?
> or `SmallPtrSet`?
I went with `llvm::SmallPtrSet` as that seems more common in clang sources compared to `std::unordered_set`.


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