command! togglesort
         \ :if &sort == '-size,+name'
         \ |    set sort=+mtime
         \ |    echo 'Sorted by modification date'
         \ |elseif &sort == '+name'
         \ |    set sort=-size
         \ |    echo 'Sorted by size'
         \ |else
         \ |    set sort=+name
         \ |    echo 'Sorted by name'
         \ |endif
