use strict;
my $str = 'Русское слово имЕющее роВНо ОДНу заглавнуЮ';
my $regex = qr/(?(DEFINE)
(?<u>[А-ЯЁ])
(?<l>[а-яё])
(?<b>
(?<=^)(?=[а-яёА-ЯЁ])
|
(?<=[а-яёА-ЯЁ])(?=$)
|
(?<=[^а-яёА-ЯЁ])(?=[а-яёА-ЯЁ])
|
(?<=[а-яёА-ЯЁ])(?=[^а-яёА-ЯЁ])
)
)
(?P>b)
(?:
(?P>l)+(?P>u)(?P>l)+
|
(?P>u)(?P>l)+
|
(?P>l)+(?P>u)
)
(?P>b)/umxp;
if ( $str =~ /$regex/g ) {
print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n";
# print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n";
# print "Capture Group 2 is $2 ... and so on\n";
}
# ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p'
# Named capture groups can be called via $+{name}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html