use strict;
use warnings;
use Data::Dump qw/pp dd/;
use Test::More;
my $wiki =
'_/one *two*/ three_ null _/four *five*/ six_ null _/seven *eight*/ nine_';
my $expected =
'one two three null four five six null seven eight nine';
my $pre = qr/(^|\s|>)/;
my $post = qr/($|\s|<)/;
my %h = (
'*' => 'b' ,
'/' => 'i' ,
'_' => 'u' ,
);
sub tf { s{ $pre ([_*/]) (.*?) \2 (?=$post)}{$1<$h{$2}>$3$h{$2}>}xg };
$_=$wiki;
my $DBG = 1;
diag "IN <= '$wiki'\n\n" if $DBG;
for my $i (1..3) {
tf();
diag "$i: '$_'\n\n" if $DBG;
}
is($_,$expected," repeated replace works");
done_testing;