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package Clone; use strict; use Carp; use vars qw($VERSION @ISA @EXPORT @EXPORT_OK $AUTOLOAD); require Exporter; require DynaLoader; require AutoLoader; @ISA = qw(Exporter DynaLoader); # Items to export into callers namespace by default. Note: do not export # names by default without a very good reason. Use EXPORT_OK instead. # Do not simply export all your public functions/methods/constants. @EXPORT = qw(); @EXPORT_OK = qw( clone ); $VERSION = '0.34'; bootstrap Clone $VERSION; # Preloaded methods go here. # Autoload methods go after =cut, and are processed by the autosplit program. 1; __END__ =head1 NAME Clone - recursively copy Perl datatypes =head1 SYNOPSIS package Foo; use parent 'Clone'; package main; my $original = Foo->new; $copy = $original->clone; # or use Clone qw(clone); $a = { 'foo' => 'bar', 'move' => 'zig' }; $b = [ 'alpha', 'beta', 'gamma', 'vlissides' ]; $c = Foo->new; $d = clone($a); $e = clone($b); $f = clone($c); =head1 DESCRIPTION This module provides a clone() method which makes recursive copies of nested hash, array, scalar and reference types, including tied variables and objects. 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 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 less levels, while dclone() can be faster for structures 4 or more levels deep. =head1 COPYRIGHT Copyright 2001-2012 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