.\" -*- mode: troff; coding: utf-8 -*-
.\" Automatically generated by Pod::Man 5.01 (Pod::Simple 3.43)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>.
.ie n \{\
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds C`
.    ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
.    if \nF \{\
.        de IX
.        tm Index:\\$1\t\\n%\t"\\$2"
..
.        if !\nF==2 \{\
.            nr % 0
.            nr F 2
.        \}
.    \}
.\}
.rr rF
.\" ========================================================================
.\"
.IX Title "Regexp::Common::_support 3"
.TH Regexp::Common::_support 3 2023-07-25 "perl v5.38.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH NAME
Regexp::Common::support \-\- Support functions for Regexp::Common.
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\&    use Regexp::Common::_support qw /luhn/;
\&
\&    luhn ($number)    # Returns true/false.
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
This module contains some subroutines to be used by other \f(CW\*(C`Regexp::Common\*(C'\fR
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.
.IP luhn 4
.IX Item "luhn"
This subroutine returns true if its argument passes the luhn checksum test.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
<http://www.webopedia.com/TERM/L/Luhn_formula.html>.
.SH AUTHOR
.IX Header "AUTHOR"
Abigail (\fIregexp\-common@abigail.be\fR).
.SH "BUGS AND IRRITATIONS"
.IX Header "BUGS AND IRRITATIONS"
Bound to be plenty.
.SH "LICENSE and COPYRIGHT"
.IX Header "LICENSE and COPYRIGHT"
This software is Copyright (c) 2001 \- 2017, Damian Conway and Abigail.
.PP
This module is free software, and maybe used under any of the following
licenses:
.PP
.Vb 4
\& 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.
.Ve