phpman > perldoc > Regexp::Common::_support(3pm)

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 AT abigail.be*).

BUGS AND IRRITATIONS
    Bound to be plenty.

LICENSE and COPYRIGHT
    This software is Copyright (c) 2001 - 2017, 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 License.               See the file COPYRIGHT.BSD.
     4) The MIT License.               See the file COPYRIGHT.MIT.