Mercurial > pub > Impl
annotate Lib/IMPL/require.pm @ 259:b92f19630d33
Merge with 91bae9f41a9cf2d52f5cff5a5c3e7c8683c7d47e
author | sergey |
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date | Fri, 21 Dec 2012 00:09:11 +0400 |
parents | 34a3f8668b58 |
children | 0f59b2de72af |
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1 package IMPL::require; |
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2 use Scalar::Util qw(set_prototype); |
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3 use strict; |
251 | 4 #require IMPL::Code::Loader; |
5 | |
6 our %PENDING; | |
7 our $LOADER_LOG; | |
8 | |
9 our $level = 0; | |
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10 |
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11 sub import { |
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12 my ($self, $aliases) = @_; |
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13 |
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14 return unless $aliases; |
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15 |
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16 die "A hash reference is required" unless ref $aliases eq 'HASH'; |
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17 |
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18 my $caller = caller; |
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19 |
252 | 20 $PENDING{$caller} = 1; |
21 | |
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22 no strict 'refs'; |
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23 |
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24 while( my ($alias, $class) = each %$aliases ) { |
251 | 25 _trace("$alias => $class"); |
26 $level++; | |
27 | |
238 | 28 $class = _require($class); |
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29 |
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30 *{"${caller}::$alias"} = set_prototype(sub { |
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31 $class |
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32 }, ''); |
251 | 33 |
34 $level--; | |
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35 } |
252 | 36 |
37 delete $PENDING{$caller}; | |
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38 } |
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39 |
230 | 40 sub _require { |
41 my ($class) = @_; | |
42 | |
43 if ( not $class =~ s/^-// ) { | |
44 ( my $file = $class ) =~ s/::|'/\//g; | |
252 | 45 _trace("already pending") and return $class |
251 | 46 if $PENDING{$class}; |
47 $PENDING{$class} = 1; | |
48 _trace("loading $file.pm"); | |
49 $level++; | |
230 | 50 require "$file.pm"; |
251 | 51 $level--; |
52 _trace("loaded $file.pm"); | |
53 delete $PENDING{$class}; | |
230 | 54 } |
55 $class; | |
56 } | |
57 | |
251 | 58 sub _trace { |
59 my ($message) = @_; | |
60 | |
61 $LOADER_LOG->print("\t" x $level ,"$message\n") if $LOADER_LOG; | |
62 | |
63 return 1; | |
64 } | |
65 | |
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66 1; |
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67 |
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68 __END__ |
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69 |
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70 =pod |
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71 |
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72 =head1 NAME |
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73 |
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74 C<IMPL::require> загружает и назначет псевдонимы модулям. |
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75 |
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76 =head1 SYNOPSIS |
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77 |
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78 =begin code |
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79 |
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80 use IMPL::require { |
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81 TFoo => 'My::Nested::Package::Foo', |
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82 FS => 'File::Spec' |
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83 }; |
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84 |
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85 my $obj = My::Nested::Package::Foo->new('foo'); |
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86 $obj = TFoo->new('foo'); # ditto |
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87 |
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88 FS->catdir('one','two','three'); |
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89 |
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90 =end code |
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91 |
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92 =head1 DESCRIPTION |
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93 |
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94 Загружает модули с помощью C<require> и создает константы которые возвращаю полное имя модуля. |
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95 |
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96 |
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97 =cut |