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package Exception::Class; |
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235367
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use 5.008001; |
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use strict; |
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use warnings; |
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236
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our $VERSION = '1.45'; |
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use Carp qw( croak ); |
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236
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use Exception::Class::Base; |
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use Scalar::Util qw( blessed reftype ); |
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our $BASE_EXC_CLASS; |
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BEGIN { $BASE_EXC_CLASS ||= 'Exception::Class::Base'; } |
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our %CLASSES; |
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sub import { |
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my $class = shift; |
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## no critic (Variables::ProhibitPackageVars) |
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local $Exception::Class::Caller = caller(); |
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my %c; |
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my %needs_parent; |
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while ( my $subclass = shift ) { |
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my $def = ref $_[0] ? shift : {}; |
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$def->{isa} |
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= $def->{isa} |
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? ( ref $def->{isa} ? $def->{isa} : [ $def->{isa} ] ) |
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100
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: []; |
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35
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66
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$c{$subclass} = $def; |
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} |
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38
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# We need to sort by length because if we check for keys in the |
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# Foo::Bar:: stash, this creates a "Bar::" key in the Foo:: stash! |
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MAKE_CLASSES: |
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50
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foreach my $subclass ( sort { length $a <=> length $b } keys %c ) { |
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46
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42
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37
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my $def = $c{$subclass}; |
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44
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# We already made this one. |
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48
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next if $CLASSES{$subclass}; |
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47
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{ |
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## no critic (TestingAndDebugging::ProhibitNoStrict) |
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5
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5
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29
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no strict 'refs'; |
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907
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23
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29
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50
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23
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foreach my $parent ( @{ $def->{isa} } ) { |
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47
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51
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7
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100
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10
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unless ( keys %{"$parent\::"} ) { |
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32
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52
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$needs_parent{$subclass} = { |
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parents => $def->{isa}, |
54
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4
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13
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def => $def |
55
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}; |
56
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4
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18
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next MAKE_CLASSES; |
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} |
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} |
59
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} |
60
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61
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$class->_make_subclass( |
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19
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50
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80
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subclass => $subclass, |
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def => $def || {}, |
64
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); |
65
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} |
66
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67
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10
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3886
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foreach my $subclass ( keys %needs_parent ) { |
68
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69
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# This will be used to spot circular references. |
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4
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9
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my %seen; |
71
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4
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11
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$class->_make_parents( \%needs_parent, $subclass, \%seen ); |
72
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} |
73
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} |
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75
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sub _make_parents { |
76
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6
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6
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20
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my $class = shift; |
77
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6
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8
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my $needs = shift; |
78
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6
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8
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my $subclass = shift; |
79
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6
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8
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my $seen = shift; |
80
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6
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9
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my $child = shift; # Just for error messages. |
81
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82
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## no critic (TestingAndDebugging::ProhibitNoStrict, TestingAndDebugging::ProhibitProlongedStrictureOverride) |
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5
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5
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31
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no strict 'refs'; |
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8
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5
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2519
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84
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85
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# What if someone makes a typo in specifying their 'isa' param? |
86
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# This should catch it. Either it's been made because it didn't |
87
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# have missing parents OR it's in our hash as needing a parent. |
88
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# If neither of these is true then the _only_ place it is |
89
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# mentioned is in the 'isa' param for some other class, which is |
90
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# not a good enough reason to make a new class. |
91
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die |
92
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"Class $subclass appears to be a typo as it is only specified in the 'isa' param for $child\n" |
93
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unless exists $needs->{$subclass} |
94
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|| $CLASSES{$subclass} |
95
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6
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0
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33
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13
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|| keys %{"$subclass\::"}; |
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0
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0
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0
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96
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97
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6
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7
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foreach my $c ( @{ $needs->{$subclass}{parents} } ) { |
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6
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12
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98
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99
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# It's been made |
100
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6
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100
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66
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26
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next if $CLASSES{$c} || keys %{"$c\::"}; |
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20
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101
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102
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die "There appears to be some circularity involving $subclass\n" |
103
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2
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50
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4
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if $seen->{$subclass}; |
104
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105
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2
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4
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$seen->{$subclass} = 1; |
106
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107
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2
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8
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$class->_make_parents( $needs, $c, $seen, $subclass ); |
108
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} |
109
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110
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6
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100
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66
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827
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return if $CLASSES{$subclass} || keys %{"$subclass\::"}; |
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28
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111
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112
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$class->_make_subclass( |
113
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subclass => $subclass, |
114
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def => $needs->{$subclass}{def} |
115
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4
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13
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); |
116
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} |
117
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118
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sub _make_subclass { |
119
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23
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23
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32
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my $class = shift; |
120
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23
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64
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my %p = @_; |
121
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122
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23
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35
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my $subclass = $p{subclass}; |
123
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23
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31
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my $def = $p{def}; |
124
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125
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23
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34
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my $isa; |
126
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23
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50
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62
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if ( $def->{isa} ) { |
127
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23
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50
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49
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$isa = ref $def->{isa} ? join q{ }, @{ $def->{isa} } : $def->{isa}; |
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23
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52
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128
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} |
129
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23
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66
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99
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$isa ||= $BASE_EXC_CLASS; |
130
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131
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23
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26
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my $version_name = 'VERSION'; |
132
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133
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23
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52
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my $code = <<"EOPERL"; |
134
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package $subclass; |
135
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136
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use base qw($isa); |
137
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138
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our \$$version_name = '1.1'; |
139
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140
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1; |
141
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142
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EOPERL |
143
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144
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23
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100
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45
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if ( $def->{description} ) { |
145
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1
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10
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( my $desc = $def->{description} ) =~ s/([\\\'])/\\$1/g; |
146
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1
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4
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$code .= <<"EOPERL"; |
147
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sub description |
148
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{ |
149
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return '$desc'; |
150
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} |
151
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EOPERL |
152
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} |
153
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154
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23
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30
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my @fields; |
155
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23
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100
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47
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if ( my $fields = $def->{fields} ) { |
156
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@fields |
157
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8
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100
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66
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40
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= ref $fields && reftype $fields eq 'ARRAY' ? @$fields : $fields; |
158
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159
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$code |
160
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.= 'sub Fields { return ($_[0]->SUPER::Fields, ' |
161
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8
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32
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. join( ', ', map {"'$_'"} @fields ) |
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9
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34
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162
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. ") }\n\n"; |
163
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164
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8
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16
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foreach my $field (@fields) { |
165
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9
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100
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400
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croak |
166
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"Invalid field name <$field>. A field name must be a legal Perl identifier." |
167
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unless $field =~ /\A[a-z_][a-z0-9_]*\z/i; |
168
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6
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23
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$code .= sprintf( "sub %s { \$_[0]->{%s} }\n", $field, $field ); |
169
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} |
170
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} |
171
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172
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20
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100
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39
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if ( my $alias = $def->{alias} ) { |
173
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## no critic (Variables::ProhibitPackageVars) |
174
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2
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50
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5
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die 'Cannot make alias without caller' |
175
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unless defined $Exception::Class::Caller; |
176
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177
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## no critic (TestingAndDebugging::ProhibitNoStrict) |
178
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5
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5
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33
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no strict 'refs'; |
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5
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8
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5
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1709
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179
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2
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38
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*{"$Exception::Class::Caller\::$alias"} |
180
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2
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2
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15
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= sub { $subclass->throw(@_) }; |
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2
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476
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181
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} |
182
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183
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20
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50
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37
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if ( my $defaults = $def->{defaults} ) { |
184
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0
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0
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$code |
185
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.= "sub _defaults { return shift->SUPER::_defaults, our \%_DEFAULTS }\n"; |
186
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## no critic (TestingAndDebugging::ProhibitNoStrict) |
187
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5
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5
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45
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no strict 'refs'; |
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5
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16
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5
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1161
|
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188
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0
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0
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*{"$subclass\::_DEFAULTS"} = {%$defaults}; |
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0
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0
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189
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} |
190
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191
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## no critic (BuiltinFunctions::ProhibitStringyEval, ErrorHandling::RequireCheckingReturnValueOfEval) |
192
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5
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5
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1
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30
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eval $code; |
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5
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3
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1
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15
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5
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1
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1
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580
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3
|
|
|
1
|
1
|
18
|
|
|
3
|
|
|
1
|
0
|
14
|
|
|
3
|
|
|
1
|
1
|
249
|
|
|
1
|
|
|
1
|
0
|
6
|
|
|
1
|
|
|
1
|
0
|
1
|
|
|
1
|
|
|
1
|
0
|
86
|
|
|
1
|
|
|
1
|
0
|
5
|
|
|
1
|
|
|
1
|
|
2
|
|
|
1
|
|
|
1
|
|
86
|
|
|
1
|
|
|
1
|
|
6
|
|
|
1
|
|
|
1
|
|
1
|
|
|
1
|
|
|
0
|
|
110
|
|
|
1
|
|
|
4
|
|
6
|
|
|
1
|
|
|
1
|
|
2
|
|
|
1
|
|
|
2
|
|
110
|
|
|
1
|
|
|
1
|
|
7
|
|
|
1
|
|
|
1
|
|
2
|
|
|
1
|
|
|
4
|
|
561
|
|
|
1
|
|
|
0
|
|
6
|
|
|
1
|
|
|
1
|
|
2
|
|
|
1
|
|
|
1
|
|
128
|
|
|
1
|
|
|
|
|
6
|
|
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
82
|
|
|
1
|
|
|
|
|
6
|
|
|
1
|
|
|
|
|
10
|
|
|
1
|
|
|
|
|
441
|
|
|
1
|
|
|
|
|
6
|
|
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
142
|
|
|
1
|
|
|
|
|
7
|
|
|
1
|
|
|
|
|
3
|
|
|
1
|
|
|
|
|
89
|
|
|
1
|
|
|
|
|
7
|
|
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
153
|
|
|
1
|
|
|
|
|
6
|
|
|
1
|
|
|
|
|
1
|
|
|
1
|
|
|
|
|
257
|
|
|
20
|
|
|
|
|
4516
|
|
|
0
|
|
|
|
|
0
|
|
|
4
|
|
|
|
|
17
|
|
|
1
|
|
|
|
|
22
|
|
|
2
|
|
|
|
|
10
|
|
|
1
|
|
|
|
|
5
|
|
|
1
|
|
|
|
|
990
|
|
|
4
|
|
|
|
|
721
|
|
|
0
|
|
|
|
|
0
|
|
|
1
|
|
|
|
|
6
|
|
|
1
|
|
|
|
|
5
|
|
193
|
20
|
50
|
|
|
|
57
|
die $@ if $@; |
194
|
|
|
|
|
|
|
|
195
|
20
|
|
|
|
|
64
|
( my $filename = "$subclass.pm" ) =~ s{::}{/}g; |
196
|
20
|
|
|
|
|
52
|
$INC{$filename} = __FILE__; |
197
|
|
|
|
|
|
|
|
198
|
20
|
|
|
|
|
1581
|
$CLASSES{$subclass} = 1; |
199
|
|
|
|
|
|
|
} |
200
|
|
|
|
|
|
|
|
201
|
|
|
|
|
|
|
sub caught { |
202
|
5
|
|
|
5
|
0
|
26
|
my $e = $@; |
203
|
|
|
|
|
|
|
|
204
|
5
|
100
|
|
|
|
13
|
return $e unless $_[1]; |
205
|
|
|
|
|
|
|
|
206
|
2
|
100
|
66
|
|
|
18
|
return unless blessed($e) && $e->isa( $_[1] ); |
207
|
1
|
|
|
|
|
2
|
return $e; |
208
|
|
|
|
|
|
|
} |
209
|
|
|
|
|
|
|
|
210
|
1
|
|
|
1
|
0
|
545
|
sub Classes { sort keys %Exception::Class::CLASSES } |
211
|
|
|
|
|
|
|
|
212
|
|
|
|
|
|
|
1; |
213
|
|
|
|
|
|
|
|
214
|
|
|
|
|
|
|
# ABSTRACT: A module that allows you to declare real exception classes in Perl |
215
|
|
|
|
|
|
|
|
216
|
|
|
|
|
|
|
__END__ |