Why not something like this:
$re = qr{
\<
(?:
(?> [^<>]+ ) # Non-parens without backtracking
|
(??{ $re }) # Group with matching parens
)*
\>
}x;
$s = "B<I<U<bold underlined text>>> and B<bold text>";
1 while $s =~ s{([BUI])<([^<>]*(?:$re[^<>]*)*)>}{<$1>$2</$1>}g;
print $s,"\n";
Jenda
We'd like to help you learn to help yourself
Look around you, all you see are sympathetic eyes
Stroll around the grounds until you feel at home
-- P. Simon in Mrs. Robinson |
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