namespace {
llvm::cl::OptionCategory UseOverrideCategory("Use override options");
llvm::cl::extrahelp UseOverrideCategoryHelp(R"(
This tool ensures that you use the 'override' keyword appropriately.
For example, given this snippet of code:
  struct Base {
    virtual void method(int);
  };
  struct Derived : public Base {
    void method(int);
  };
Running this tool over the code will produce a warning message stating that the
declaration 'method()' should be followed by the keyword 'override'.
)");
}

auto main(int argc, const char* argv[]) -> int {
  using namespace clang::tooling;

  CommonOptionsParser OptionsParser(argc, argv, UseOverrideCategory);
  ClangTool Tool(OptionsParser.getCompilations(),
                 OptionsParser.getSourcePathList());

  auto action = newFrontendActionFactory<UseOverride::Action>();
  return Tool.run(action.get());
}