VitaNuo added a comment.

Thank you!



================
Comment at: clang-tools-extra/clangd/IncludeCleaner.cpp:419
       });
+  // Put possibly equal diagnostics together for deduplication.
+  // The duplicates might be from macro arguments that get expanded multiple
----------------
Could you move the below to a separate function with a descriptive name? IMO 
taking care of the special cases inline makes functions very long and distracts 
the reader from their main purpose.


================
Comment at: clang-tools-extra/clangd/IncludeCleaner.cpp:432
+  });
+  MissingIncludes.erase(llvm::unique(MissingIncludes), MissingIncludes.end());
   std::vector<const Inclusion *> UnusedIncludes =
----------------
Nit: maybe add a comment explaining that `llvm::unique` returns a past-the-end 
iterator after deduplicating elements? I've spent a bit of time deciphering 
this line.


================
Comment at: clang-tools-extra/clangd/unittests/IncludeCleanerTests.cpp:417
+    #include "all.h"
+    FOO([[Foo]]);)cpp");
+
----------------
Nit: move `)cpp");` to the next line please.


================
Comment at: clang-tools-extra/clangd/unittests/IncludeCleanerTests.cpp:421
+  TU.AdditionalFiles["foo.h"] = guard("struct Foo {};");
+  TU.AdditionalFiles["all.h"] = guard(R"(
+    #include "foo.h"
----------------
Nit: use the same style for multiline strings, i.e., `R"cpp(`.


================
Comment at: clang-tools-extra/clangd/unittests/IncludeCleanerTests.cpp:423
+    #include "foo.h"
+    #define FOO(X) X y; X z)");
+
----------------
Nit: move closing tokens of the multiline string to next line.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D149165/new/

https://reviews.llvm.org/D149165

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