|  line  | 
 stmt  | 
 bran  | 
 cond  | 
 sub  | 
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 time  | 
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 package exported::constants;  | 
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15657
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 use strict;  | 
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 use warnings;  | 
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 use vars '$VERSION'; $VERSION = '1.0';  | 
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5
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 use Carp qw/ carp /;  | 
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 sub import {  | 
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     my ($class, @args) = @_;  | 
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     my $pkg = caller();  | 
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1
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     no strict 'refs';  | 
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1
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 50
  
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     push @{$pkg.'::ISA'}, 'Exporter' unless grep { $_ eq 'Exporter' } @{$pkg.'::ISA'};  | 
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6
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1
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     while (@args) {  | 
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2
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 50
  
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         carp "Last constant $args[0] is missing a definition" unless @args >= 2;  | 
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2
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         my ($name, $value) = splice @args, 0, 2;  | 
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2
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         *{$pkg.'::'.$name} = sub () { $value };  | 
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2
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1
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         push @{$pkg.'::EXPORT'}, $name;  | 
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2
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41
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 1;  | 
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 =head1 NAME  | 
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34
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 exported::constants - Declare constants and export them automatically  | 
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35
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 =head1 SYNOPSIS  | 
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38
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     package MyProg::Constants;  | 
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40
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     use exported::constants  | 
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41
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         USER_TYPE_USER => 'U',  | 
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42
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         USER_TYPE_APPLICATION => 'A',  | 
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43
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         USER_TYPE_ROBOT => 'B',  | 
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44
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     ;  | 
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45
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46
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     package MyProg::App;  | 
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47
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48
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     use MyProg::Constants;  | 
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49
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50
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     my @real_users = $users->search({ user_type => USER_TYPE_USER, });  | 
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51
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52
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 =head1 DESCRIPTION  | 
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53
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54
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 This is a boilerplate-removal module for creating modules of just constants in your program.  | 
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55
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 This is useful if you have a lot of magic numbers you want to eliminate,  | 
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 especially things that show up in database schemas or APIs that you want to re-use across multiple modules.  | 
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58
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 It's pretty simple to use;  | 
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60
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     use exported::constants  | 
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62
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         CONSTANT1 => $value1,  | 
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63
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         CONSTANT2 => $value2,  | 
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64
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65
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66
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 and your package is automatically an exporter,  | 
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67
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 and automatically exports (by default) all the constants listed.  | 
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68
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69
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 =head1 RESTRICTIONS  | 
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71
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 =over  | 
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72
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73
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 =item * List constants don't work, because C is intended to always create multiple constants in a single invocation.  | 
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75
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 =item * This module always works using C<@EXPORT> in L; this is unfortunate for developers who want to explicitly import all their constants.  | 
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76
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77
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 =back  | 
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78
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79
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 =head1 SEE ALSO  | 
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80
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81
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 =over  | 
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82
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83
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 =item * L  | 
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84
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85
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 =item * L  | 
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86
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87
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 =back  | 
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88
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89
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 =head1 AUTHOR  | 
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90
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91
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 Jonathan Cast   | 
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92
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93
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 =head1 COPYRIGHT AND LICENSE  | 
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94
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95
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 Copyright 2017 Jonathan Cast  | 
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96
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97
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 Licensed under the Apache License, Version 2.0 (the "License").  |