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16
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16
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355802
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use 5.006; # our |
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60
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2
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16
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16
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167
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use strict; |
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16
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33
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16
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363
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3
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16
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16
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98
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use warnings; |
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16
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45
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16
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1549
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4
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5
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package PPIx::Element::Sub; |
6
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7
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our $VERSION = '0.001000'; # TRIAL |
8
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9
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# ABSTRACT: Find subroutines associated with any element. |
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11
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our $AUTHORITY = 'cpan:KENTNL'; # AUTHORITY |
12
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13
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our @EXPORT_OK = qw( identify_sub identify_next_sub identify_associated_sub ); |
14
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15
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16
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16
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84
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use Exporter 5.57 qw( import ); |
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16
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276
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16
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539
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16
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16
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16
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84
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use Scalar::Util qw( refaddr ); |
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16
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30
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16
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7063
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17
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18
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sub identify_sub { |
19
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108
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108
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1
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2022625
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my ($element) = @_; |
20
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21
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# any contains itself. |
22
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108
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100
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627
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return $element if $element->isa('PPI::Statement::Sub'); |
23
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24
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# no parents => can't find a sub => must be main execution |
25
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94
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100
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100
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770
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return unless $element->can('parent') and defined( my $parent = $element->parent ); |
26
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27
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# If we have a parent, ask it for which sub we're in. |
28
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76
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836
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return identify_sub($parent); |
29
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} |
30
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31
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sub identify_next_sub { |
32
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81
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81
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1
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10273
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my ($element) = @_; |
33
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34
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# Parentless nodes can't have siblings |
35
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81
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100
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100
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506
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return unless $element->can('parent') and defined( my $parent = $element->parent ); |
36
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37
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# parents without children can't give us siblings |
38
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# but *their* parents could |
39
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65
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100
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796
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return identify_next_sub($parent) unless $parent->can('children'); |
40
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41
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64
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154
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my $own_addr = refaddr($element); |
42
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64
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84
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my $seen_self = 0; |
43
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44
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# Search direct siblings deeply |
45
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64
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196
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for my $sibling ( $parent->children ) { |
46
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47
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# Iterate forwards until self is found. |
48
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200
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100
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2258
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if ( not $seen_self ) { |
49
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145
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100
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454
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$seen_self = 1 if refaddr($sibling) eq $own_addr; |
50
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145
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220
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next; |
51
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} |
52
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53
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# For successive siblings |
54
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# return the first sub found |
55
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55
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100
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299
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return $sibling if $sibling->isa('PPI::Statement::Sub'); |
56
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57
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# If a sibling has children, a sub could be one of them |
58
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# note: a false value == fail, but explit undef is invalid query |
59
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48
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100
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100
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341
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if ( $sibling->can('find_first') and my $result = $sibling->find_first('PPI::Statement::Sub') ) { |
60
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2
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1286
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return $result; |
61
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} |
62
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} |
63
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64
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# When no sibling is a sub, assume that the sub is further down |
65
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# the document, making it a sibling that succeeds a parent, or a descendent |
66
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# of a parents sibling. |
67
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55
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213
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return identify_next_sub($parent); |
68
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} |
69
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70
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sub identify_associated_sub { |
71
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16
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16
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1
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7126
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my ($element) = @_; |
72
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73
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# First, resolve to the containers, as all comments inside a |
74
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# sub are related to the sub itself |
75
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16
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100
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73
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if ( my $parent = identify_sub($element) ) { |
76
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7
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21
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return $parent; |
77
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} |
78
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79
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# Otherwise, look into the next-sibling tree to find the subsequent sub |
80
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9
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119
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return identify_next_sub($element); |
81
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} |
82
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83
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1; |
84
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85
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__END__ |