Function appDataPath

Returns application data directory

string appDataPath(
  string subdir = null
);

On unix, it will return path to subdirectory in home directory - e.g. /home/user/.subdir if ".subdir" is passed as a paramter.

On windows, it will return path to subdir in APPDATA directory - e.g. C:\Users\User\AppData\Roaming\.subdir.