[clang-tidy][NFC] Use StringMap for ClangTidyCheckFactories::FacoryMap

[njames93]

Fix build errors

clang-tools-extra/clang-tidy/ClangTidy.cpp

#endif // CLANG_ENABLE_STATIC_ANALYZER
   return std::make_unique<ClangTidyASTConsumer>(
       std::move(Consumers), std::move(Profiling), std::move(Finder),
       std::move(Checks));
 }
 
 std::vector<std::string> ClangTidyASTConsumerFactory::getCheckNames() {
   std::vector<std::string> CheckNames;
   for (const auto &CheckFactory : *CheckFactories) {
-    if (Context.isCheckEnabled(CheckFactory.first))
-      CheckNames.push_back(CheckFactory.first);
+    if (Context.isCheckEnabled(CheckFactory.getKey()))
+      CheckNames.emplace_back(CheckFactory.getKey());
   }
 
 #if CLANG_ENABLE_STATIC_ANALYZER
   for (const auto &AnalyzerCheck : getAnalyzerCheckersAndPackages(
            Context, Context.canEnableAnalyzerAlphaCheckers()))
     CheckNames.push_back(AnalyzerCheckNamePrefix + AnalyzerCheck.first);
 #endif // CLANG_ENABLE_STATIC_ANALYZER
 

clang-tools-extra/clang-tidy/ClangTidyModule.h

registerCheckFactory(CheckName,
                            return std::make_unique<CheckType>(Name, Context);
                          });
   }
 
   /// Create instances of checks that are enabled.
   std::vector<std::unique_ptr<ClangTidyCheck>>
   createChecks(ClangTidyContext *Context);
 
-  typedef std::map<std::string, CheckFactory> FactoryMap;
+  typedef llvm::StringMap<CheckFactory> FactoryMap;
   FactoryMap::const_iterator begin() const { return Factories.begin(); }
   FactoryMap::const_iterator end() const { return Factories.end(); }
   bool empty() const { return Factories.empty(); }
 
 private:
   FactoryMap Factories;
 };
 

clang-tools-extra/clang-tidy/ClangTidyModule.cpp

 #include "ClangTidyModule.h"
 #include "ClangTidyCheck.h"
 
 namespace clang {
 namespace tidy {
 
 void ClangTidyCheckFactories::registerCheckFactory(StringRef Name,
                                                    CheckFactory Factory) {
-  Factories[std::string(Name)] = std::move(Factory);
+  Factories.insert_or_assign(Name, std::move(Factory));
 }
 
 std::vector<std::unique_ptr<ClangTidyCheck>>
 ClangTidyCheckFactories::createChecks(ClangTidyContext *Context) {
   std::vector<std::unique_ptr<ClangTidyCheck>> Checks;
   for (const auto &Factory : Factories) {
-    if (Context->isCheckEnabled(Factory.first))
-      Checks.emplace_back(Factory.second(Factory.first, Context));
+    if (Context->isCheckEnabled(Factory.getKey()))
+      Checks.emplace_back(Factory.getValue()(Factory.getKey(), Context));
   }
   return Checks;
 }
 
 ClangTidyOptions ClangTidyModule::getModuleOptions() {
   return ClangTidyOptions();
 }
 
 } // namespace tidy
 } // namespace clang