Ah I see. The key is to change the capturing group to match one or more times instead of just once. It just becomes )+ from ).
Added: I goofed. That is *part* of the key. The above change has a maximal match but loses the contents of the non-innermost matches. Here's a version that *works*
$re = qr/
\[ # Opening bracket
((?: # Capture the contents
[^][]+ # Body of a link
|
(??{$re}) # Or recurse
)+) # and allow repeats internally
\] # Closing bracket
/x;
Noted: for a brief period there was also some pushing into @f. That shouldn't have been posted so I removed it.
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