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package Devel::Constants; |
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24742
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use 5.006; |
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2
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97
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use strict; |
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93
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use warnings; |
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71
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use vars qw( $VERSION %EXPORT_OK ); |
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$VERSION = '1.03'; |
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%EXPORT_OK = |
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( |
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flag_to_names => \&flag_to_names, |
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to_name => \&to_name, |
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); |
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2
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use constant; |
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46
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2172
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use subs 'oldimport'; |
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2
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{ |
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86
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no warnings; |
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446
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*oldimport = \&constant::import; |
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*constant::import = \&_newimport; |
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} |
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my %constants; |
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sub import |
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{ |
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3482
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my $class = shift; |
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my $pkg = my $import = caller(); |
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my $flagholder = {}; |
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7
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my @exports; |
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while ( my $arg = shift ) |
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{ |
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100
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if ( ref($arg) eq 'HASH' ) |
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100
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100
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50
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{ |
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$flagholder = $arg; |
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} |
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elsif ( $arg eq 'package' ) |
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{ |
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1
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$pkg = shift if @_; |
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} |
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elsif ( $arg eq 'import' ) |
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{ |
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1
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$import = shift if @_; |
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} |
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elsif ( exists $EXPORT_OK{$arg} ) |
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{ |
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5
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100
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100
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my $name = (@_ and ! exists $EXPORT_OK{ $_[0] }) ? shift : $arg; |
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push @exports, [ $name, $EXPORT_OK{$arg} ]; |
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} |
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} |
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7
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$constants{$pkg} = $flagholder; |
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59
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2
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2
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11
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no strict 'refs'; |
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2
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4
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2
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686
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60
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7
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26
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for my $export (@exports) |
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{ |
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5
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8
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*{ $import . "::$export->[0]" } = $export->[1]; |
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63
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} |
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65
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} |
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67
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sub _newimport |
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{ |
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36
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36
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19306
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my ( $class, @args ) = @_; |
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36
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55
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my $pkg = caller(); |
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72
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36
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100
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931
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if ( defined $constants{$pkg} ) |
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{ |
74
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10
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20
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while (@args) |
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{ |
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10
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25
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my ( $name, $val ) = splice( @args, 0, 2 ); |
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10
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50
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22
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last unless $val; |
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10
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$constants{$pkg}{$val} = $name; |
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} |
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} |
81
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82
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36
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3631
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goto &oldimport; |
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} |
84
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85
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sub flag_to_names |
86
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{ |
87
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3
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3
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1
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2000
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my ( $val, $pkg ) = @_; |
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3
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66
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22
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$pkg ||= caller(); |
89
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90
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3
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50
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15
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return unless my $constants = $constants{$pkg}; |
91
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92
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3
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5
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my @flags; |
93
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3
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15
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for my $flag ( keys %$constants ) |
94
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{ |
95
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12
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100
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47
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push @flags, $constants->{$flag} if $val & $flag; |
96
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} |
97
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3
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100
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24
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return wantarray() ? @flags : join( ' ', @flags ); |
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} |
99
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100
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sub to_name |
101
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{ |
102
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1
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1
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1
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939
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my ( $val, $pkg ) = @_; |
103
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1
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33
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9
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$pkg ||= caller(); |
104
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105
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1
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50
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5
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return unless my $constants = $constants{$pkg}; |
106
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1
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50
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12
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return $constants->{$val} if exists $constants->{$val}; |
107
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} |
108
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109
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1; |
110
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111
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__END__ |