annotate Lib/IMPL/require.pm @ 259:b92f19630d33

Merge with 91bae9f41a9cf2d52f5cff5a5c3e7c8683c7d47e
author sergey
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;
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4 #require IMPL::Code::Loader;
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5
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6 our %PENDING;
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7 our $LOADER_LOG;
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8
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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
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20 $PENDING{$caller} = 1;
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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 ) {
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25 _trace("$alias => $class");
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26 $level++;
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27
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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 }, '');
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33
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34 $level--;
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35 }
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36
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37 delete $PENDING{$caller};
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38 }
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39
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40 sub _require {
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41 my ($class) = @_;
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42
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43 if ( not $class =~ s/^-// ) {
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44 ( my $file = $class ) =~ s/::|'/\//g;
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45 _trace("already pending") and return $class
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46 if $PENDING{$class};
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47 $PENDING{$class} = 1;
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48 _trace("loading $file.pm");
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49 $level++;
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50 require "$file.pm";
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51 $level--;
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52 _trace("loaded $file.pm");
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53 delete $PENDING{$class};
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54 }
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55 $class;
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56 }
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57
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58 sub _trace {
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59 my ($message) = @_;
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60
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61 $LOADER_LOG->print("\t" x $level ,"$message\n") if $LOADER_LOG;
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62
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63 return 1;
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64 }
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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