use strict;
my $str = 'Hace coincidir números decimales y exponenciales aislados para el sistema de numeración decimal. \'
test: 22e22 22e+22 +22e22 +22e+22
22.22 22. .22
22.e22 22.e+22 22.22e22 22.22e+22 .22e22 .22e+22
88e 88e+ e88 e+88 88e88.';
my $regex = qr/(?:^|(?<=\s)) # delimitador inicial
(?:[+-]?\d+e[+-]?\d+| # exponenciales puros
[+-]?\d+\.\d+|[+-]?\d+\.|[+-]?\.\d+) # punto flotante
(?:e[+-]?\d+)? # exponenciales de fracción
(?=\s) # delimitador de finalización/xip;
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