StringRegExp with repeating group

[c.haslam]

I have a string that contains a number of tabstops. Each tabstop has a position, a kind (left, right, centre, decimal) and sometimes a leader. So the string might look like "1.5r_4c=", and so on.

So each tab has the syntax <number><l|c|r|d><.|-|_|t| > where | means or .

I have

$a = StringRegExp("2.4c=15r ","([0-9.]{1,}[lcrd][\,\_\=\t ])*",4)
$s = ""
For $i = 0 To UBound($a)-1
    $b = $a[$i]
    For $j = 0 To UBound($B)-1
        $s = $s&$b[$j]&"|"
    Next
Next
MsgBox(0,"",$s&@error&"|"&@extended)

What expression can I use if the last character, the dot leader, is optional, i.e. it is left off if there is no dot leader?

[SmOke_N]

I have a string that contains a number of tabstops. Each tabstop has a position, a kind (left, right, centre, decimal) and sometimes a leader. So the string might look like "1.5r_4c=", and so on.

So each tab has the syntax <number><l|c|r|d><.|-|_|t| > where | means or .

I have

$a = StringRegExp("2.4c=15r ","([0-9.]{1,}[lcrd][\,\_\=\t ])*",4)
$s = ""
For $i = 0 To UBound($a)-1
    $b = $a[$i]
    For $j = 0 To UBound($B)-1
        $s = $s&$b[$j]&"|"
    Next
Next
MsgBox(0,"",$s&@error&"|"&@extended)

What expression can I use if the last character, the dot leader, is optional, i.e. it is left off if there is no dot leader?

Use the left to right one followed by center and a kick in the ass by the right one.