[PATCH] D64127: [clangd] Deduplicate clang-tidy diagnostic messages.

[Sam McCall via Phabricator via cfe-commits]

sammccall accepted this revision.
sammccall added inline comments.
This revision is now accepted and ready to land.


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Comment at: clang-tools-extra/clangd/Diagnostics.cpp:427
   }
+  // Deduplicate clang-tidy diagnostics -- some clang-tidy checks may emit
+  // duplicated messages due to various reasons (e.g. the check doesn't handle
----------------
hokein wrote:
> sammccall wrote:
> > This sorting/partitioning seems a bit heavyweight... what about
> > 
> > ```
> > DenseSet<pair<Range, Message>> SeenDiagnostics;
> > llvm::erase_if([&](const Diag &D) {
> >   return !SeenDiagnostics.try_emplace(D.Range, D.Message).second;
> > });
> > ```
> This is neat. DenseSet requires a hashvalue function of the value, which we don't have, switched to use `set`
Can we add one instead? It'd be nice to get rid of the `operator<` on range, use of `set` etc.
I can do this is a followup if you prefer.


Repository:
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  https://reviews.llvm.org/D64127/new/

https://reviews.llvm.org/D64127