dgoldman added inline comments.

================
Comment at: clang-tools-extra/clangd/SemanticHighlighting.cpp:131
     return HighlightingKind::Interface;
-  if (isa<ObjCCategoryDecl>(D))
+  if (isa<ObjCCategoryDecl, ObjCCategoryImplDecl>(D))
     return HighlightingKind::Namespace;
----------------
kadircet wrote:
> let's do this in a separate change, with some tests
Given the other changes, this is needed otherwise the semantic highlighting 
test fails.


================
Comment at: clang-tools-extra/clangd/refactor/Rename.cpp:171-177
+    if (const auto *C = dyn_cast<ObjCCategoryDecl>(D)) {
+      if (C->getLocation() == TokenStartLoc)
+        D = C->getClassInterface();
+      else if (const auto *I = C->getImplementation())
+        if (I->getLocation() == TokenStartLoc)
+          D = C->getClassInterface();
+    }
----------------
kadircet wrote:
> sorry i don't follow what's the logic doing here and we're likely doing these 
> in the wrong layer.
> 
> we should either:
> - Fix selection tree to pick the correct ASTNode, if it's picking the wrong 
> one due to not having special cases for these locations here
> - Fix the `targetDecl` logic to make sure it emits all the declarations that 
> might be referenced by this ast node, if it's missing ClassInterface.
> - Fix the canonicalRenameDecl, if we should always prefer `ClassInterface` in 
> these cases.
Replied to you in chat, LMK what you think.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D152720/new/

https://reviews.llvm.org/D152720

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