Class registry_error

Source/cmWindowsRegistry.cxx:91–104

class registry_exception

// class registry_exception
class registry_error : public std::exception
{
public:
  registry_error(std::string msg)
    : What(std::move(msg))
  {
  }
  ~registry_error() override = default;

  char const* what() const noexcept override { return What.c_str(); }

private:
  std::string What;
};

// Class KeyHandler
class KeyHandler