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173
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1 package IMPL::clone;
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2
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3 use Scalar::Util qw(blessed reftype);
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4
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5 use base qw(Exporter);
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6 our @EXPORT_OK = qw(&clone);
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7
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8 {
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9 my %handlers = (
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10 HASH => sub {
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11 my $class = blessed($_[0]);
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12
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13 my $new = {};
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14 while (my ($key,$val) = each %{$_[0]}) {
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15 $new->{$key} = clone($val);
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16 }
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17 $class ? bless $new, $class : $new;
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18 },
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19 ARRAY => sub {
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20 my $class = blessed($_[0]);
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21 $class ? bless( [ map clone($_), @{$_[0]} ], $class ) : [ map clone($_), @{$_[0]} ];
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22 },
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23 SCALAR => sub {
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24 my $class = blessed($_[0]);
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25
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26 my $v = ${$_[0]};
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27 $class ? bless \$v, $class : \$v;
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28 },
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29 REF => sub {
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30 my $class = blessed($_[0]);
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31 my $v = clone ( ${$_[0]} );
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32 $class ? bless \$v, $class : \$v;
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33
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34 },
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35 REGEXP => sub {
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36 $_[0];
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37 }
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38 );
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39 sub clone {
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40 return unless @_;
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41
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42 return $_[0] unless ref $_[0];
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43
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44 return ($handlers{reftype($_[0])} || sub { die "Unknown reftype " . reftype($_[0])} )->($_[0]);
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45 }
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46 }
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47
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48 1;
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