dired-sort-R-check

dired-sort-R-check is a compiled Lisp function in `dired.el'.

(dired-sort-R-check SWITCHES)

Additional processing of -R in ls option string SWITCHES.
Saves `dired-subdir-alist' when R is set and restores saved value
minus any directories explicitly deleted when R is cleared.
To be called first in body of `dired-sort-other', etc.