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package PerlX::SafeNav; |
2
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5
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5
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912640
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use strict; |
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34
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5
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145
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3
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5
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24
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use warnings; |
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10
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5
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188
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4
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our $VERSION = '0.003'; |
5
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6
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5
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5
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25
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use Exporter 'import'; |
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5
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10
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5
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1273
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7
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8
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our @EXPORT = ('$safenav', '$unsafenav'); |
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our @EXPORT_OK = ('&safenav'); |
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11
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our $safenav = sub { |
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41
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41
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14733
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my $o = shift; |
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41
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209
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bless \$o, 'PerlX::SafeNav::Object'; |
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}; |
15
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16
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our $unsafenav = sub { |
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11
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11
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19
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${ $_[0] } |
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11
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56
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18
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}; |
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20
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sub safenav (&@) { |
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5
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5
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1
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13145
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my ($block, $o) = @_; |
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5
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13
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local $_ = $o->$safenav; |
23
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5
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17
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$block->()->$unsafenav; |
24
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} |
25
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26
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package PerlX::SafeNav::Object; |
27
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28
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use overload |
29
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'@{}' => sub { |
30
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16
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16
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33
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my $self = shift; |
31
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16
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55
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tie my @a, 'PerlX::SafeNav::ArrayRef', $$self; |
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16
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87
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return \@a; |
33
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}, |
34
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'%{}' => sub { |
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18
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18
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39
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my $self = shift; |
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18
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58
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tie my %h, 'PerlX::SafeNav::HashRef', $$self; |
37
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18
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77
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return \%h; |
38
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5
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5
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36
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}; |
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5
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12
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5
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81
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39
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40
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sub AUTOLOAD { |
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44
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44
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106
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our $AUTOLOAD; |
42
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44
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122
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my $method = substr $AUTOLOAD, 2 + rindex($AUTOLOAD, '::'); |
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44
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44
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85
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my ($self, @args) = @_; |
45
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46
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44
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100
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253
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(defined $$self) ? |
47
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$$self -> $method(@args) -> $safenav : |
48
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$self; |
49
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} |
50
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51
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0
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sub DESTROY {} |
52
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53
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package PerlX::SafeNav::ArrayRef; |
54
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5
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5
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3148
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use Tie::Array; |
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5
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6094
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5
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680
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55
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our @ISA = ('Tie::Array'); |
56
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57
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sub TIEARRAY { |
58
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16
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16
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54
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my ($class, $o) = @_; |
59
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16
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45
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return bless \$o, $class; |
60
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} |
61
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62
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sub FETCH { |
63
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16
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16
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38
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my ($self, $i) = @_; |
64
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16
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51
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@$$self[$i] -> $safenav; |
65
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} |
66
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67
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sub FETCHSIZE { |
68
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0
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0
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0
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my ($self) = @_; |
69
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0
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0
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@$$self |
70
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} |
71
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72
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package PerlX::SafeNav::HashRef; |
73
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5
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5
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47
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use Tie::Hash; |
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5
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12
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5
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613
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74
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our @ISA = ('Tie::Hash'); |
75
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76
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sub TIEHASH { |
77
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18
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18
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38
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my ($class, $o) = @_; |
78
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18
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37
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bless \$o, $class; |
79
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} |
80
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81
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sub FETCH { |
82
|
18
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18
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34
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my ($self, $k) = @_; |
83
|
18
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64
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$$self->{$k} -> $safenav; |
84
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} |
85
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86
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1; |
87
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88
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__END__ |