Commit | Line | Data |
4093c859 |
1 | package Mouse::Util; |
2 | use strict; |
3 | use warnings; |
5c12655d |
4 | use base qw/Exporter/; |
d72006ca |
5 | use Carp; |
4093c859 |
6 | |
eae80759 |
7 | our @EXPORT_OK = qw( |
eae80759 |
8 | get_linear_isa |
e2578812 |
9 | apply_all_roles |
67199842 |
10 | version |
11 | authority |
12 | identifier |
eae80759 |
13 | ); |
14 | our %EXPORT_TAGS = ( |
15 | all => \@EXPORT_OK, |
16 | ); |
17 | |
42d7df00 |
18 | BEGIN { |
272a1930 |
19 | my $impl; |
bcd39bf4 |
20 | if ($] >= 5.009_005) { |
388b8ebd |
21 | require mro; |
272a1930 |
22 | $impl = \&mro::get_linear_isa; |
23 | } else { |
f172d4e7 |
24 | my $loaded = do { |
25 | local $SIG{__DIE__} = 'DEFAULT'; |
52c48ad7 |
26 | eval { require MRO::Compat; 1 }; |
f172d4e7 |
27 | }; |
272a1930 |
28 | if ($loaded) { |
29 | $impl = \&mro::get_linear_isa; |
30 | } else { |
31 | # VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV |
32 | my $code; # this recurses so it isn't pretty |
33 | $code = sub { |
34 | no strict 'refs'; |
35 | |
36 | my $classname = shift; |
37 | |
38 | my @lin = ($classname); |
39 | my %stored; |
40 | foreach my $parent (@{"$classname\::ISA"}) { |
41 | my $plin = $code->($parent); |
42 | foreach (@$plin) { |
43 | next if exists $stored{$_}; |
44 | push(@lin, $_); |
45 | $stored{$_} = 1; |
46 | } |
47 | } |
48 | return \@lin; |
49 | }; |
50 | # ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^ |
51 | $impl = $code; |
eae80759 |
52 | } |
53 | } |
bcd39bf4 |
54 | |
272a1930 |
55 | no strict 'refs'; |
56 | *{ __PACKAGE__ . '::get_linear_isa'} = $impl; |
eae80759 |
57 | } |
58 | |
67199842 |
59 | { # adapted from Class::MOP::Module |
60 | |
61 | sub version { no strict 'refs'; ${shift->name.'::VERSION'} } |
62 | sub authority { no strict 'refs'; ${shift->name.'::AUTHORITY'} } |
63 | sub identifier { |
64 | my $self = shift; |
65 | join '-' => ( |
66 | $self->name, |
67 | ($self->version || ()), |
68 | ($self->authority || ()), |
69 | ); |
70 | } |
71 | } |
72 | |
abfdffe0 |
73 | # taken from Class/MOP.pm |
74 | { |
75 | my %cache; |
76 | |
77 | sub resolve_metaclass_alias { |
78 | my ( $type, $metaclass_name, %options ) = @_; |
79 | |
80 | my $cache_key = $type; |
81 | return $cache{$cache_key}{$metaclass_name} |
82 | if $cache{$cache_key}{$metaclass_name}; |
83 | |
84 | my $possible_full_name = |
85 | 'Mouse::Meta::' |
86 | . $type |
87 | . '::Custom::' |
88 | . $metaclass_name; |
89 | |
90 | my $loaded_class = |
91 | load_first_existing_class( $possible_full_name, |
92 | $metaclass_name ); |
93 | |
94 | return $cache{$cache_key}{$metaclass_name} = |
95 | $loaded_class->can('register_implementation') |
96 | ? $loaded_class->register_implementation |
97 | : $loaded_class; |
98 | } |
99 | } |
100 | |
101 | # taken from Class/MOP.pm |
102 | sub _is_valid_class_name { |
103 | my $class = shift; |
104 | |
105 | return 0 if ref($class); |
106 | return 0 unless defined($class); |
107 | return 0 unless length($class); |
108 | |
109 | return 1 if $class =~ /^\w+(?:::\w+)*$/; |
110 | |
111 | return 0; |
112 | } |
113 | |
114 | # taken from Class/MOP.pm |
115 | sub load_first_existing_class { |
116 | my @classes = @_ |
117 | or return; |
118 | |
119 | foreach my $class (@classes) { |
120 | unless ( _is_valid_class_name($class) ) { |
121 | my $display = defined($class) ? $class : 'undef'; |
122 | confess "Invalid class name ($display)"; |
123 | } |
124 | } |
125 | |
126 | my $found; |
127 | my %exceptions; |
128 | for my $class (@classes) { |
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 | |
2e92bb89 |
166 | sub apply_all_roles { |
167 | my $meta = Mouse::Meta::Class->initialize(shift); |
2e92bb89 |
168 | |
21498b08 |
169 | my @roles; |
f6715552 |
170 | |
171 | # Basis of Data::OptList |
21498b08 |
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') ) |
186 | || croak("You can only consume roles, " |
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 | } |
198 | |
2e92bb89 |
199 | } |
200 | |
4093c859 |
201 | 1; |
202 | |
f38ce2d0 |
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 | |
f38ce2d0 |
215 | =cut |
216 | |