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package Clone;
use strict;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK $AUTOLOAD);
require Exporter;
require DynaLoader;
require AutoLoader;
@ISA = qw(Exporter DynaLoader);
@EXPORT = qw();
@EXPORT_OK = qw( clone );
$VERSION = '0.38';
bootstrap Clone $VERSION;
1;
__END__
=head1 NAME
Clone - recursively copy Perl datatypes
=for html
<a href="https://travis-ci.org/garu/Clone"><img src="https://travis-ci.org/garu/Clone.png?branch=master" alt="Build Status"></a>
<a href="https://coveralls.io/r/garu/Clone?branch=master"><img src="https://coveralls.io/repos/garu/Clone/badge.png?branch=master" alt="Coverage Status"></a>
<a href="https://metacpan.org/pod/Clone"><img src="https://badge.fury.io/pl/Clone.svg" alt="CPAN version"></a>
=head1 SYNOPSIS
use Clone 'clone';
my $data = {
set => [ 1 .. 50 ],
foo => {
answer => 42,
object => SomeObject->new,
},
};
my $cloned_data = clone($data);
$cloned_data->{foo}{answer} = 1;
print $cloned_data->{foo}{answer}; # '1'
print $data->{foo}{answer}; # '42'
You can also add it to your class:
package Foo;
use parent 'Clone';
sub new { bless {}, shift }
package main;
my $obj = Foo->new;
my $copy = $obj->clone;
=head1 DESCRIPTION
This module provides a C<clone()> method which makes recursive
copies of nested hash, array, scalar and reference types,
including tied variables and objects.
C<clone()> takes a scalar argument and duplicates it. To duplicate lists,
arrays or hashes, pass them in by reference, e.g.
my $copy = clone (\@array);
# or
my %copy = %{ clone (\%hash) };
=head1 SEE ALSO
L<Storable>'s C<dclone()> is a flexible solution for cloning variables,
albeit slower for average-sized data structures. Simple
and naive benchmarks show that Clone is faster for data structures
with 3 or fewer levels, while C<dclone()> can be faster for structures
4 or more levels deep.
=head1 COPYRIGHT
Copyright 2001-2015 Ray Finch. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 AUTHOR
Ray Finch C<< <rdf@cpan.org> >>
Breno G. de Oliveira C<< <garu@cpan.org> >> and
Florian Ragwitz C<< <rafl@debian.org> >> perform routine maintenance
releases since 2012.
=cut