[clangd] Replace HighlightingKind::NumKinds with LastKind. NFC

Summary:
The latter simplifies the client code by avoiding the need to handle it
as a separate case statement.

Reviewers: hokein

Reviewed By: hokein

Subscribers: nridge, MaskRay, jkorous, arphaman, kadircet, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D67277

llvm-svn: 371375

clang-tools-extra/clangd/ClangdLSPServer.cpp

@@ -87,7 +87,7 @@ CompletionItemKindBitset defaultCompletionItemKinds() {
 std::vector<std::vector<std::string>> buildHighlightScopeLookupTable() {
   std::vector<std::vector<std::string>> LookupTable;
   // HighlightingKind is using as the index.
-  for (int KindValue = 0; KindValue < (int)HighlightingKind::NumKinds;
+  for (int KindValue = 0; KindValue <= (int)HighlightingKind::LastKind;
        ++KindValue)
     LookupTable.push_back({toTextMateScope((HighlightingKind)(KindValue))});
   return LookupTable;

clang-tools-extra/clangd/SemanticHighlighting.cpp

@@ -383,9 +383,8 @@ llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, HighlightingKind K) {
     return OS << "Primitive";
   case HighlightingKind::Macro:
     return OS << "Macro";
-  case HighlightingKind::NumKinds:
-    llvm_unreachable("NumKinds is not a valid HighlightingKind");
   }
+  llvm_unreachable("invalid HighlightingKind");
 }
 
 std::vector<LineHighlightings>
@@ -511,8 +510,6 @@ llvm::StringRef toTextMateScope(HighlightingKind Kind) {
     return "storage.type.primitive.cpp";
   case HighlightingKind::Macro:
     return "entity.name.function.preprocessor.cpp";
-  case HighlightingKind::NumKinds:
-    llvm_unreachable("must not pass NumKinds to the function");
   }
   llvm_unreachable("unhandled HighlightingKind");
 }

clang-tools-extra/clangd/SemanticHighlighting.h

@@ -41,7 +41,7 @@ enum class HighlightingKind {
   Primitive,
   Macro,
 
-  NumKinds,
+  LastKind = Macro
 };
 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, HighlightingKind K);