# NAME Clone::Choose - Choose appropriate clone utility # SYNOPSIS use Clone::Choose; my $data = { value => 42, href => { set => [ 'foo', 'bar' ], value => 'baz', }, }; my $cloned_data = clone $data; # it's also possible to use Clone::Choose and pass a clone preference use Clone::Choose qw(:Storable); # DESCRIPTION `Clone::Choose` checks several different modules which provides a `clone()` function and selects an appropriate one. The default preference is Clone Storable Clone::PP This list might evolve in future. Please see ["EXPORTS"](#exports) how to pick a particular one. # EXPORTS `Clone::Choose` exports `clone()` by default. One can explicitly import `clone` by using use Clone::Choose qw(clone); or pick a particular `clone` implementation use Clone::Choose qw(:Storable clone); The exported implementation is resolved dynamically, which means that any using module can either rely on the default backend preference or choose a particular one. It is also possible to select a particular `clone` backend by setting the environment variable CLONE\_CHOOSE\_PREFERRED\_BACKEND to your preferred backend. This also means, an already chosen import can't be modified like use Clone::Choose qw(clone :Storable); When one seriously needs different clone implementations, our _recommended_ way to use them would be: use Clone::Choose (); # do not import my ($xs_clone, $st_clone); { local @Clone::Choose::BACKENDS = (Clone => "clone"); $xs_clone = Clone::Choose->can("clone"); } { local @Clone::Choose::BACKENDS = (Storable => "dclone"); $st_clone = Clone::Choose->can("clone"); } Don't misinterpret _recommended_ - modifying `@Clone::Choose::BACKENDS` has a lot of pitfalls and is unreliable beside such small examples. Do not hesitate open a request with an appropriate proposal for choosing implementations dynamically. The use of `@Clone::Choose::BACKENDS` is discouraged and will be deprecated as soon as anyone provides a better idea. # PACKAGE METHODS ## backend `backend` tells the caller about the dynamic chosen backend: use Clone::Choose; say Clone::Choose->backend; # Clone This method currently exists for debug purposes only. ## get\_backends `get_backends` returns a list of the currently supported backends. # AUTHOR Jens Rehsack Stefan Hermes # BUGS Please report any bugs or feature requests to `bug-Clone-Choose at rt.cpan.org`, or through the web interface at [http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Clone-Choose](http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Clone-Choose). I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. # SUPPORT You can find documentation for this module with the perldoc command. perldoc Clone::Choose You can also look for information at: - RT: CPAN's request tracker [http://rt.cpan.org/NoAuth/Bugs.html?Dist=Clone-Choose](http://rt.cpan.org/NoAuth/Bugs.html?Dist=Clone-Choose) - AnnoCPAN: Annotated CPAN documentation [http://annocpan.org/dist/Clone-Choose](http://annocpan.org/dist/Clone-Choose) - CPAN Ratings [http://cpanratings.perl.org/d/Clone-Choose](http://cpanratings.perl.org/d/Clone-Choose) - Search CPAN [http://search.cpan.org/dist/Clone-Choose/](http://search.cpan.org/dist/Clone-Choose/) # LICENSE AND COPYRIGHT Copyright 2017 Jens Rehsack Copyright 2017 Stefan Hermes This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License. See http://dev.perl.org/licenses/ for more information. # SEE ALSO [Clone](https://metacpan.org/pod/Clone), [Clone::PP](https://metacpan.org/pod/Clone::PP), [Storable](https://metacpan.org/pod/Storable)