Regexp::Common::_support(3)

NAME
Regexp::Common::support -- Support functions for Regexp::Common.

SYNOPSIS
    use Regexp::Common::_support qw /luhn/;

    luhn ($number)    # Returns true/false.

DESCRIPTION
This module contains some subroutines to be used by other "Regexp::Common" modules. It's not intended to be used directly. Subroutines from the module may disappear without any notice, or their meaning or interface may change without notice.

luhn
    This subroutine returns true if its argument passes the luhn checksum test.

SEE ALSO
<http://www.webopedia.com/TERM/L/Luhn_formula.html>.

AUTHOR
Abigail (regexp-common@abigail.be).

BUGS AND IRRITATIONS
Bound to be plenty.

LICENSE and COPYRIGHT
This software is Copyright (c) 2001 - 2009, Damian Conway and Abigail.

This module is free software, and maybe used under any of the following licenses:

 1) The Perl Artistic License.     See the file COPYRIGHT.AL.
 2) The Perl Artistic License 2.0. See the file COPYRIGHT.AL2.
 3) The BSD Licence.               See the file COPYRIGHT.BSD.
 4) The MIT Licence.               See the file COPYRIGHT.MIT.