text: //
  //
  //
  /// @brief Returns the current username from the enviroment variable.
  //
  /// @return A string pattern.
  //
  inline std::string check_current_username()
  {
  //
  //  The Linux version:
  	#if defined(LINUX)
  	return tools::convert<std::string>(getenv("LOGNAME"));
  	#endif
  //
  //  The Microsoft Windows version:
  	#if defined(WIN32)
  	return "";
  	#endif
  //
  //  The Apple OS-X version:
  	#if defined(OS_X)
  	return "";
  	#endif
  };
  