The word borders are tricky and certainly should not be used with Unicode data, as
/\b/ means a border between
\W and
\w, i.e. between
[A-Za-z0-9] and
[^A-Za-z0-9].
You must decide what you call a 'word'. In my opinion it is any alphanumeric sequence with apostrophes and hyphens, but your definition may differ.
#!/usr/bin/perl
use warnings;
use strict;
my $test = "TEST TESt TE'st T 12TE";
while ($test =~ /(?<![\pL\pN\'-]) #NOT a hyphen, apostroph, lett
+er or number before
(\p{Lu}{2,}) # two or more uppercase letter
+s
(?![\pL\pN\'-]) #NOT a hyphen, apostroph, lett
+er or number after
/xg)
{
print "$1\n";
}
My regex matches only "TEST" at the beginning of the string in the example.
s;;Just-me-not-h-Ni-m-P-Ni-lm-I-ar-O-Ni;;tr?IerONim-?HAcker ?d;print