Clone::PP - Recursively copy Perl datatypes

       Developed by Matthew Simon Cavalletto at Evolution Softworks.  More free Perl software is available at
       "www.evoscript.org".

       Some data types, such as globs, regexes, and code refs, are always copied shallowly.

       References to hash elements are not properly duplicated. (This is why two tests in t/dclone.t that are
       marked "todo".) For example, the following test should succeed but does not:

         my $hash = { foo => 1 };
         $hash->{bar} = \{ $hash->{foo} };
         my $copy = clone( \%hash );
         $hash->{foo} = 2;
         $copy->{foo} = 2;
         ok( $hash->{bar} == $copy->{bar} );

       To report bugs via the CPAN web tracking system, go to
       "http://rt.cpan.org/NoAuth/Bugs.html?Dist=Clone-PP" or send mail to "Dist=Clone-PP#rt.cpan.org",
       replacing "#" with "@".

       Copyright 2003 Matthew Simon Cavalletto. You may contact the author directly at "evo@cpan.org" or
       "simonm@cavalletto.org".

       Code initially derived from Ref.pm. Portions Copyright 1994 David Muir Sharnoff.

       Interface based by Clone by Ray Finch with contributions from chocolateboy.  Portions Copyright 2001 Ray
       Finch. Portions Copyright 2001 chocolateboy.

       You may use, modify, and distribute this software under the same terms as Perl.

perl v5.36.0                                       2022-10-13                                     Clone::PP(3pm)

       This module provides a general-purpose clone function to make deep copies of Perl data structures. It
       calls itself recursively to copy nested hash, array, scalar and reference types, including tied variables
       and objects.

       The clone() function takes a scalar argument to copy. To duplicate arrays or hashes, pass them in by
       reference:

         my $copy = clone(\@array);    my @copy = @{ clone(\@array) };
         my $copy = clone(\%hash);     my %copy = %{ clone(\%hash) };

       The clone() function also accepts an optional second parameter that can be used to limit the depth of the
       copy. If you pass a limit of 0, clone will return the same value you supplied; for a limit of 1, a
       shallow copy is constructed; for a limit of 2, two layers of copying are done, and so on.

         my $shallow_copy = clone( $item, 1 );

       To allow objects to intervene in the way they are copied, the clone() function checks for a couple of
       optional methods. If an object provides a method named "clone_self", it is called and the result returned
       without further processing. Alternately, if an object provides a method named "clone_init", it is called
       on the copied object before it is returned.

       Clone::PP - Recursively copy Perl datatypes

       <https://github.com/neilbowers/Clone-PP>

       Clone - a baseclass which provides a "clone()" method.

       MooseX::Clone - find-grained cloning for Moose objects.

       The "dclone()" function in Storable.

       Data::Clone - polymorphic data cloning (see its documentation for what that means).

       Clone::Any - use whichever of the cloning methods is available.

         use Clone::PP qw(clone);

         $item = { 'foo' => 'bar', 'move' => [ 'zig', 'zag' ]  };
         $copy = clone( $item );

         $item = [ 'alpha', 'beta', { 'gamma' => 'vlissides' } ];
         $copy = clone( $item );

         $item = Foo->new();
         $copy = clone( $item );

       Or as an object method:

         require Clone::PP;
         push @Foo::ISA, 'Clone::PP';

         $item = Foo->new();
         $copy = $item->clone();