/*....v....1....v....2....v....3....v....4....v....5....v....6....v....7....v....8....v....9....v....0 */
/*drwx------   2 gmgauthier gmgauthier 4.0K Feb 28 20:58 .a68g/                                        */
/*-rw-r--r--   1 gmgauthier gmgauthier 3.1K Feb 23 22:41 .tmux.conf                                    */

dir_str = "drwx------   2 gmgauthier gmgauthier 4.0K Feb 28 20:58 .a68g/"
filestr = "-rw-r--r--   1 gmgauthier gmgauthier 3.1K Feb 23 22:41 .tmux.conf"
/*                                  attrs num  o     g     sz   mo           dy           tm                  filename         */
dir_regex = .RegularExpression~new("?{10} ?{3} ?{10} ?{10} ?{4} [:alpha:]{3} [:digit:]{2} [:digit::punct:]{5} ([:xdigit::punct:]*)", "MINIMAL")
say "String to Match: " filestr
say "Match Result:    " dir_regex~match(filestr)
say "Match Location:  " dir_regex~Position
say "Match String:    " filestr~substr(dir_regex~position+1)
say
nrs = 1, 42, 0, 5436412, "1A", "f43g"
re = .RegularExpression~new("[1-9][0-9]*")
do nr over nrs
   say nr "is" re~match(nr)~?("a valid", "an invalid") "number"
end
say
-- allow hexadecimal numbers and a single 0
re~parse("0|([1-9a-fA-F][:xdigit:]*)")
do nr over nrs
  say nr "is" re~match(nr)~?("a valid", "an invalid") "number"
end

say
text = "It's the year 2025!"
say text
re = .RegularExpression~new("[1-9][0-9]*")
begin = re~pos(text)
if begin > 0 then
do
   year = text~substr(begin, re~position - begin + 1)
   say "Found the number" year "in this sentence."
end

Exit

::requires "rxregexp.cls"