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1 | package Mouse::Util; |
2 | use strict; |
3 | use warnings; |
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4 | use base qw/Exporter/; |
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5 | use Carp qw(confess); |
6 | use B (); |
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7 | |
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8 | our @EXPORT_OK = qw( |
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9 | get_linear_isa |
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10 | apply_all_roles |
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11 | get_code_info |
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12 | ); |
13 | our %EXPORT_TAGS = ( |
14 | all => \@EXPORT_OK, |
15 | ); |
16 | |
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17 | BEGIN { |
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18 | my $impl; |
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19 | if ($] >= 5.009_005) { |
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20 | require mro; |
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21 | $impl = \&mro::get_linear_isa; |
22 | } else { |
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23 | my $e = do { |
24 | local $@; |
25 | eval { require MRO::Compat }; |
26 | $@; |
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27 | }; |
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28 | if (!$e) { |
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29 | $impl = \&mro::get_linear_isa; |
30 | } else { |
31 | # VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV |
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32 | my $_get_linear_isa_dfs; # this recurses so it isn't pretty |
33 | $_get_linear_isa_dfs = sub { |
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34 | no strict 'refs'; |
35 | |
36 | my $classname = shift; |
37 | |
38 | my @lin = ($classname); |
39 | my %stored; |
40 | foreach my $parent (@{"$classname\::ISA"}) { |
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41 | my $plin = $_get_linear_isa_dfs->($parent); |
42 | foreach my $p(@$plin) { |
43 | next if exists $stored{$p}; |
44 | push(@lin, $p); |
45 | $stored{$p} = 1; |
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46 | } |
47 | } |
48 | return \@lin; |
49 | }; |
50 | # ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^ |
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51 | $impl = $_get_linear_isa_dfs; |
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52 | } |
53 | } |
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54 | |
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55 | |
56 | no warnings 'once'; |
57 | *get_linear_isa = $impl; |
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58 | } |
59 | |
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60 | { # taken from Sub::Identify |
61 | sub get_code_info($) {\r |
62 | my ($coderef) = @_;\r |
63 | ref($coderef) or return;\r |
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64 | |
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65 | my $cv = B::svref_2object($coderef);\r |
66 | $cv->isa('B::CV') or return; |
67 | |
68 | my $gv = $cv->GV;\r |
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69 | $gv->isa('B::GV') or return;\r |
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70 | \r |
71 | return ($gv->STASH->NAME, $gv->NAME);\r |
72 | }\r |
73 | } |
74 | |
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75 | # taken from Class/MOP.pm |
76 | { |
77 | my %cache; |
78 | |
79 | sub resolve_metaclass_alias { |
80 | my ( $type, $metaclass_name, %options ) = @_; |
81 | |
82 | my $cache_key = $type; |
83 | return $cache{$cache_key}{$metaclass_name} |
84 | if $cache{$cache_key}{$metaclass_name}; |
85 | |
86 | my $possible_full_name = |
87 | 'Mouse::Meta::' |
88 | . $type |
89 | . '::Custom::' |
90 | . $metaclass_name; |
91 | |
92 | my $loaded_class = |
93 | load_first_existing_class( $possible_full_name, |
94 | $metaclass_name ); |
95 | |
96 | return $cache{$cache_key}{$metaclass_name} = |
97 | $loaded_class->can('register_implementation') |
98 | ? $loaded_class->register_implementation |
99 | : $loaded_class; |
100 | } |
101 | } |
102 | |
103 | # taken from Class/MOP.pm |
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104 | sub is_valid_class_name { |
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105 | my $class = shift; |
106 | |
107 | return 0 if ref($class); |
108 | return 0 unless defined($class); |
109 | return 0 unless length($class); |
110 | |
111 | return 1 if $class =~ /^\w+(?:::\w+)*$/; |
112 | |
113 | return 0; |
114 | } |
115 | |
116 | # taken from Class/MOP.pm |
117 | sub load_first_existing_class { |
118 | my @classes = @_ |
119 | or return; |
120 | |
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121 | my $found; |
122 | my %exceptions; |
123 | for my $class (@classes) { |
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124 | unless ( is_valid_class_name($class) ) { |
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125 | my $display = defined($class) ? $class : 'undef'; |
126 | confess "Invalid class name ($display)"; |
127 | } |
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128 | |
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129 | my $e = _try_load_one_class($class); |
130 | |
131 | if ($e) { |
132 | $exceptions{$class} = $e; |
133 | } |
134 | else { |
135 | $found = $class; |
136 | last; |
137 | } |
138 | } |
139 | return $found if $found; |
140 | |
141 | confess join( |
142 | "\n", |
143 | map { |
144 | sprintf( "Could not load class (%s) because : %s", |
145 | $_, $exceptions{$_} ) |
146 | } @classes |
147 | ); |
148 | } |
149 | |
150 | # taken from Class/MOP.pm |
151 | sub _try_load_one_class { |
152 | my $class = shift; |
153 | |
154 | return if Mouse::is_class_loaded($class); |
155 | |
156 | my $file = $class . '.pm'; |
157 | $file =~ s{::}{/}g; |
158 | |
159 | return do { |
160 | local $@; |
161 | eval { require($file) }; |
162 | $@; |
163 | }; |
164 | } |
165 | |
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166 | sub apply_all_roles { |
167 | my $meta = Mouse::Meta::Class->initialize(shift); |
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168 | |
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169 | my @roles; |
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170 | |
171 | # Basis of Data::OptList |
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172 | my $max = scalar(@_); |
173 | for (my $i = 0; $i < $max ; $i++) { |
174 | if ($i + 1 < $max && ref($_[$i + 1])) { |
175 | push @roles, [ $_[$i++] => $_[$i] ]; |
176 | } else { |
177 | push @roles, [ $_[$i] => {} ]; |
178 | } |
179 | } |
180 | |
181 | foreach my $role_spec (@roles) { |
182 | Mouse::load_class( $role_spec->[0] ); |
183 | } |
184 | |
185 | ( $_->[0]->can('meta') && $_->[0]->meta->isa('Mouse::Meta::Role') ) |
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186 | || confess("You can only consume roles, " |
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187 | . $_->[0] |
188 | . " is not a Moose role") |
189 | foreach @roles; |
190 | |
191 | if ( scalar @roles == 1 ) { |
192 | my ( $role, $params ) = @{ $roles[0] }; |
193 | $role->meta->apply( $meta, ( defined $params ? %$params : () ) ); |
194 | } |
195 | else { |
196 | Mouse::Meta::Role->combine_apply($meta, @roles); |
197 | } |
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198 | return; |
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199 | } |
200 | |
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201 | 1; |
202 | |
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203 | __END__ |
204 | |
205 | =head1 NAME |
206 | |
207 | Mouse::Util - features, with or without their dependencies |
208 | |
209 | =head1 IMPLEMENTATIONS FOR |
210 | |
211 | =head2 L<MRO::Compat> |
212 | |
213 | =head3 get_linear_isa |
214 | |
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215 | =cut |
216 | |