Commit | Line | Data |
94b19069 |
1 | |
2 | package Class::MOP; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
3cf322a0 |
7 | use MRO::Compat; |
8 | |
4c105333 |
9 | use Carp 'confess'; |
10 | use Scalar::Util 'weaken'; |
8b978dd5 |
11 | |
2eb717d5 |
12 | use Class::MOP::Class; |
13 | use Class::MOP::Attribute; |
14 | use Class::MOP::Method; |
15 | |
c23184fc |
16 | use Class::MOP::Immutable; |
857f87a7 |
17 | |
b1f5f41d |
18 | BEGIN { |
c50b27ea |
19 | our $VERSION = '0.56'; |
b1f5f41d |
20 | our $AUTHORITY = 'cpan:STEVAN'; |
21 | |
11b56828 |
22 | *IS_RUNNING_ON_5_10 = ($] < 5.009_005) |
23 | ? sub () { 0 } |
4c105333 |
24 | : sub () { 1 }; |
46b23b44 |
25 | |
4c105333 |
26 | # NOTE: |
27 | # we may not use this yet, but once |
28 | # the get_code_info XS gets merged |
29 | # upstream to it, we will always use |
30 | # it. But for now it is just kinda |
31 | # extra overhead. |
32 | # - SL |
33 | require Sub::Identify; |
34 | |
35 | # stash these for a sec, and see how things go |
36 | my $_PP_subname = sub { $_[1] }; |
37 | my $_PP_get_code_info = sub ($) { |
38 | return ( |
39 | Sub::Identify::stash_name($_[0]), |
40 | Sub::Identify::sub_name($_[0]) |
41 | ) |
42 | }; |
43 | |
e2d4fc55 |
44 | if ($ENV{CLASS_MOP_NO_XS}) { |
4c105333 |
45 | # NOTE: |
46 | # this is if you really want things |
47 | # to be slow, then you can force the |
48 | # no-XS rule this way, otherwise we |
49 | # make an effort to load as much of |
50 | # the XS as possible. |
51 | # - SL |
52 | no warnings 'prototype', 'redefine'; |
6c34db07 |
53 | |
54 | unless (IS_RUNNING_ON_5_10()) { |
55 | # get this from MRO::Compat ... |
56 | *check_package_cache_flag = \&MRO::Compat::__get_pkg_gen_pp; |
57 | } |
58 | else { |
59 | # NOTE: |
60 | # but if we are running 5.10 |
61 | # there is no need to use the |
62 | # Pure Perl version since we |
63 | # can use the built in mro |
64 | # version instead. |
65 | # - SL |
66 | *check_package_cache_flag = \&mro::get_pkg_gen; |
67 | } |
4c105333 |
68 | # our own version of Sub::Name |
69 | *subname = $_PP_subname; |
70 | # and the Sub::Identify version of the get_code_info |
71 | *get_code_info = $_PP_get_code_info; |
72 | } |
73 | else { |
74 | # now try our best to get as much |
75 | # of the XS loaded as possible |
76 | { |
77 | local $@; |
78 | eval { |
79 | require XSLoader; |
80 | XSLoader::load( 'Class::MOP', $VERSION ); |
81 | }; |
82 | die $@ if $@ && $@ !~ /object version|loadable object/; |
83 | |
84 | # okay, so the XS failed to load, so |
85 | # use the pure perl one instead. |
86 | *get_code_info = $_PP_get_code_info if $@; |
87 | } |
88 | |
89 | # get it from MRO::Compat |
90 | *check_package_cache_flag = \&mro::get_pkg_gen; |
91 | |
92 | # now try and load the Sub::Name |
93 | # module and use that as a means |
94 | # for naming our CVs, if not, we |
95 | # use the workaround instead. |
96 | if ( eval { require Sub::Name } ) { |
6c34db07 |
97 | *subname = \&Sub::Name::subname; |
4c105333 |
98 | } |
99 | else { |
100 | *subname = $_PP_subname; |
101 | } |
102 | } |
b1f5f41d |
103 | } |
e0e4674a |
104 | |
be7677c7 |
105 | { |
106 | # Metaclasses are singletons, so we cache them here. |
107 | # there is no need to worry about destruction though |
108 | # because they should die only when the program dies. |
109 | # After all, do package definitions even get reaped? |
1d68af04 |
110 | my %METAS; |
111 | |
112 | # means of accessing all the metaclasses that have |
be7677c7 |
113 | # been initialized thus far (for mugwumps obj browser) |
1d68af04 |
114 | sub get_all_metaclasses { %METAS } |
115 | sub get_all_metaclass_instances { values %METAS } |
116 | sub get_all_metaclass_names { keys %METAS } |
be7677c7 |
117 | sub get_metaclass_by_name { $METAS{$_[0]} } |
1d68af04 |
118 | sub store_metaclass_by_name { $METAS{$_[0]} = $_[1] } |
119 | sub weaken_metaclass { weaken($METAS{$_[0]}) } |
be7677c7 |
120 | sub does_metaclass_exist { exists $METAS{$_[0]} && defined $METAS{$_[0]} } |
1d68af04 |
121 | sub remove_metaclass_by_name { $METAS{$_[0]} = undef } |
122 | |
be7677c7 |
123 | # NOTE: |
1d68af04 |
124 | # We only cache metaclasses, meaning instances of |
125 | # Class::MOP::Class. We do not cache instance of |
be7677c7 |
126 | # Class::MOP::Package or Class::MOP::Module. Mostly |
1d68af04 |
127 | # because I don't yet see a good reason to do so. |
be7677c7 |
128 | } |
129 | |
448b6e55 |
130 | sub load_class { |
131 | my $class = shift; |
1d68af04 |
132 | # see if this is already |
448b6e55 |
133 | # loaded in the symbol table |
134 | return 1 if is_class_loaded($class); |
135 | # otherwise require it ... |
136 | my $file = $class . '.pm'; |
137 | $file =~ s{::}{/}g; |
138 | eval { CORE::require($file) }; |
139 | confess "Could not load class ($class) because : $@" if $@; |
140 | unless (does_metaclass_exist($class)) { |
141 | eval { Class::MOP::Class->initialize($class) }; |
1d68af04 |
142 | confess "Could not initialize class ($class) because : $@" if $@; |
448b6e55 |
143 | } |
144 | 1; # return true if it worked |
145 | } |
146 | |
147 | sub is_class_loaded { |
c1d5345a |
148 | my $class = shift; |
149 | no strict 'refs'; |
150 | return 1 if defined ${"${class}::VERSION"} || defined @{"${class}::ISA"}; |
8861fab2 |
151 | foreach my $symbol (keys %{"${class}::"}) { |
152 | next if substr($symbol, -2, 2) eq '::'; |
153 | return 1 if defined &{"${class}::${symbol}"}; |
c1d5345a |
154 | } |
155 | return 0; |
448b6e55 |
156 | } |
157 | |
158 | |
aa448b16 |
159 | ## ---------------------------------------------------------------------------- |
160 | ## Setting up our environment ... |
161 | ## ---------------------------------------------------------------------------- |
1d68af04 |
162 | ## Class::MOP needs to have a few things in the global perl environment so |
aa448b16 |
163 | ## that it can operate effectively. Those things are done here. |
164 | ## ---------------------------------------------------------------------------- |
165 | |
3bf7644b |
166 | # ... nothing yet actually ;) |
8b978dd5 |
167 | |
b51af7f9 |
168 | ## ---------------------------------------------------------------------------- |
1d68af04 |
169 | ## Bootstrapping |
b51af7f9 |
170 | ## ---------------------------------------------------------------------------- |
1d68af04 |
171 | ## The code below here is to bootstrap our MOP with itself. This is also |
b51af7f9 |
172 | ## sometimes called "tying the knot". By doing this, we make it much easier |
173 | ## to extend the MOP through subclassing and such since now you can use the |
1d68af04 |
174 | ## MOP itself to extend itself. |
175 | ## |
b51af7f9 |
176 | ## Yes, I know, thats weird and insane, but it's a good thing, trust me :) |
1d68af04 |
177 | ## ---------------------------------------------------------------------------- |
727919c5 |
178 | |
1d68af04 |
179 | # We need to add in the meta-attributes here so that |
180 | # any subclass of Class::MOP::* will be able to |
727919c5 |
181 | # inherit them using &construct_instance |
182 | |
f0480c45 |
183 | ## -------------------------------------------------------- |
6d5355c3 |
184 | ## Class::MOP::Package |
727919c5 |
185 | |
6d5355c3 |
186 | Class::MOP::Package->meta->add_attribute( |
c23184fc |
187 | Class::MOP::Attribute->new('$!package' => ( |
b880e0de |
188 | reader => { |
1d68af04 |
189 | # NOTE: we need to do this in order |
190 | # for the instance meta-object to |
b880e0de |
191 | # not fall into meta-circular death |
1d68af04 |
192 | # |
ce2ae40f |
193 | # we just alias the original method |
1d68af04 |
194 | # rather than re-produce it here |
ce2ae40f |
195 | 'name' => \&Class::MOP::Package::name |
b880e0de |
196 | }, |
c23184fc |
197 | init_arg => 'package', |
727919c5 |
198 | )) |
199 | ); |
200 | |
a5e51f0b |
201 | Class::MOP::Package->meta->add_attribute( |
c23184fc |
202 | Class::MOP::Attribute->new('%!namespace' => ( |
a5e51f0b |
203 | reader => { |
56dcfc1a |
204 | # NOTE: |
ce2ae40f |
205 | # we just alias the original method |
206 | # rather than re-produce it here |
207 | 'namespace' => \&Class::MOP::Package::namespace |
a5e51f0b |
208 | }, |
2e877f58 |
209 | init_arg => undef, |
c4260b45 |
210 | default => sub { \undef } |
a5e51f0b |
211 | )) |
212 | ); |
213 | |
9d6dce77 |
214 | # NOTE: |
215 | # use the metaclass to construct the meta-package |
216 | # which is a superclass of the metaclass itself :P |
217 | Class::MOP::Package->meta->add_method('initialize' => sub { |
218 | my $class = shift; |
219 | my $package_name = shift; |
1d68af04 |
220 | $class->meta->new_object('package' => $package_name, @_); |
9d6dce77 |
221 | }); |
222 | |
f0480c45 |
223 | ## -------------------------------------------------------- |
224 | ## Class::MOP::Module |
225 | |
226 | # NOTE: |
1d68af04 |
227 | # yeah this is kind of stretching things a bit, |
f0480c45 |
228 | # but truthfully the version should be an attribute |
1d68af04 |
229 | # of the Module, the weirdness comes from having to |
230 | # stick to Perl 5 convention and store it in the |
231 | # $VERSION package variable. Basically if you just |
232 | # squint at it, it will look how you want it to look. |
f0480c45 |
233 | # Either as a package variable, or as a attribute of |
234 | # the metaclass, isn't abstraction great :) |
235 | |
236 | Class::MOP::Module->meta->add_attribute( |
c23184fc |
237 | Class::MOP::Attribute->new('$!version' => ( |
f0480c45 |
238 | reader => { |
ce2ae40f |
239 | # NOTE: |
240 | # we just alias the original method |
1d68af04 |
241 | # rather than re-produce it here |
ce2ae40f |
242 | 'version' => \&Class::MOP::Module::version |
f0480c45 |
243 | }, |
2e877f58 |
244 | init_arg => undef, |
c4260b45 |
245 | default => sub { \undef } |
f0480c45 |
246 | )) |
247 | ); |
248 | |
249 | # NOTE: |
1d68af04 |
250 | # By following the same conventions as version here, |
251 | # we are opening up the possibility that people can |
252 | # use the $AUTHORITY in non-Class::MOP modules as |
253 | # well. |
f0480c45 |
254 | |
255 | Class::MOP::Module->meta->add_attribute( |
c23184fc |
256 | Class::MOP::Attribute->new('$!authority' => ( |
f0480c45 |
257 | reader => { |
ce2ae40f |
258 | # NOTE: |
259 | # we just alias the original method |
1d68af04 |
260 | # rather than re-produce it here |
ce2ae40f |
261 | 'authority' => \&Class::MOP::Module::authority |
1d68af04 |
262 | }, |
2e877f58 |
263 | init_arg => undef, |
c4260b45 |
264 | default => sub { \undef } |
f0480c45 |
265 | )) |
266 | ); |
267 | |
268 | ## -------------------------------------------------------- |
6d5355c3 |
269 | ## Class::MOP::Class |
270 | |
727919c5 |
271 | Class::MOP::Class->meta->add_attribute( |
c23184fc |
272 | Class::MOP::Attribute->new('%!attributes' => ( |
f7259199 |
273 | reader => { |
1d68af04 |
274 | # NOTE: we need to do this in order |
275 | # for the instance meta-object to |
276 | # not fall into meta-circular death |
277 | # |
ce2ae40f |
278 | # we just alias the original method |
1d68af04 |
279 | # rather than re-produce it here |
ce2ae40f |
280 | 'get_attribute_map' => \&Class::MOP::Class::get_attribute_map |
f7259199 |
281 | }, |
c23184fc |
282 | init_arg => 'attributes', |
727919c5 |
283 | default => sub { {} } |
284 | )) |
285 | ); |
286 | |
351bd7d4 |
287 | Class::MOP::Class->meta->add_attribute( |
c23184fc |
288 | Class::MOP::Attribute->new('%!methods' => ( |
289 | init_arg => 'methods', |
1d68af04 |
290 | reader => { |
ce2ae40f |
291 | # NOTE: |
292 | # we just alias the original method |
1d68af04 |
293 | # rather than re-produce it here |
ce2ae40f |
294 | 'get_method_map' => \&Class::MOP::Class::get_method_map |
92330ee2 |
295 | }, |
7855ddba |
296 | default => sub { {} } |
c4260b45 |
297 | )) |
298 | ); |
299 | |
300 | Class::MOP::Class->meta->add_attribute( |
c23184fc |
301 | Class::MOP::Attribute->new('@!superclasses' => ( |
302 | accessor => { |
303 | # NOTE: |
304 | # we just alias the original method |
1d68af04 |
305 | # rather than re-produce it here |
c23184fc |
306 | 'superclasses' => \&Class::MOP::Class::superclasses |
307 | }, |
2e877f58 |
308 | init_arg => undef, |
c23184fc |
309 | default => sub { \undef } |
310 | )) |
311 | ); |
312 | |
313 | Class::MOP::Class->meta->add_attribute( |
314 | Class::MOP::Attribute->new('$!attribute_metaclass' => ( |
1d68af04 |
315 | reader => { |
6d2118a4 |
316 | # NOTE: |
317 | # we just alias the original method |
1d68af04 |
318 | # rather than re-produce it here |
6d2118a4 |
319 | 'attribute_metaclass' => \&Class::MOP::Class::attribute_metaclass |
1d68af04 |
320 | }, |
c23184fc |
321 | init_arg => 'attribute_metaclass', |
351bd7d4 |
322 | default => 'Class::MOP::Attribute', |
323 | )) |
324 | ); |
325 | |
326 | Class::MOP::Class->meta->add_attribute( |
c23184fc |
327 | Class::MOP::Attribute->new('$!method_metaclass' => ( |
1d68af04 |
328 | reader => { |
6d2118a4 |
329 | # NOTE: |
330 | # we just alias the original method |
1d68af04 |
331 | # rather than re-produce it here |
6d2118a4 |
332 | 'method_metaclass' => \&Class::MOP::Class::method_metaclass |
333 | }, |
c23184fc |
334 | init_arg => 'method_metaclass', |
1d68af04 |
335 | default => 'Class::MOP::Method', |
351bd7d4 |
336 | )) |
337 | ); |
338 | |
2bab2be6 |
339 | Class::MOP::Class->meta->add_attribute( |
c23184fc |
340 | Class::MOP::Attribute->new('$!instance_metaclass' => ( |
b880e0de |
341 | reader => { |
1d68af04 |
342 | # NOTE: we need to do this in order |
343 | # for the instance meta-object to |
344 | # not fall into meta-circular death |
345 | # |
ce2ae40f |
346 | # we just alias the original method |
1d68af04 |
347 | # rather than re-produce it here |
ce2ae40f |
348 | 'instance_metaclass' => \&Class::MOP::Class::instance_metaclass |
b880e0de |
349 | }, |
c23184fc |
350 | init_arg => 'instance_metaclass', |
1d68af04 |
351 | default => 'Class::MOP::Instance', |
2bab2be6 |
352 | )) |
353 | ); |
354 | |
9d6dce77 |
355 | # NOTE: |
1d68af04 |
356 | # we don't actually need to tie the knot with |
357 | # Class::MOP::Class here, it is actually handled |
358 | # within Class::MOP::Class itself in the |
359 | # construct_class_instance method. |
9d6dce77 |
360 | |
f0480c45 |
361 | ## -------------------------------------------------------- |
727919c5 |
362 | ## Class::MOP::Attribute |
363 | |
7b31baf4 |
364 | Class::MOP::Attribute->meta->add_attribute( |
c23184fc |
365 | Class::MOP::Attribute->new('$!name' => ( |
366 | init_arg => 'name', |
367 | reader => { |
1d68af04 |
368 | # NOTE: we need to do this in order |
369 | # for the instance meta-object to |
370 | # not fall into meta-circular death |
371 | # |
ce2ae40f |
372 | # we just alias the original method |
1d68af04 |
373 | # rather than re-produce it here |
ce2ae40f |
374 | 'name' => \&Class::MOP::Attribute::name |
b880e0de |
375 | } |
7b31baf4 |
376 | )) |
377 | ); |
378 | |
379 | Class::MOP::Attribute->meta->add_attribute( |
c23184fc |
380 | Class::MOP::Attribute->new('$!associated_class' => ( |
381 | init_arg => 'associated_class', |
382 | reader => { |
1d68af04 |
383 | # NOTE: we need to do this in order |
384 | # for the instance meta-object to |
385 | # not fall into meta-circular death |
386 | # |
ce2ae40f |
387 | # we just alias the original method |
1d68af04 |
388 | # rather than re-produce it here |
ce2ae40f |
389 | 'associated_class' => \&Class::MOP::Attribute::associated_class |
b880e0de |
390 | } |
7b31baf4 |
391 | )) |
392 | ); |
393 | |
394 | Class::MOP::Attribute->meta->add_attribute( |
c23184fc |
395 | Class::MOP::Attribute->new('$!accessor' => ( |
396 | init_arg => 'accessor', |
6d2118a4 |
397 | reader => { 'accessor' => \&Class::MOP::Attribute::accessor }, |
398 | predicate => { 'has_accessor' => \&Class::MOP::Attribute::has_accessor }, |
7b31baf4 |
399 | )) |
400 | ); |
401 | |
402 | Class::MOP::Attribute->meta->add_attribute( |
c23184fc |
403 | Class::MOP::Attribute->new('$!reader' => ( |
404 | init_arg => 'reader', |
6d2118a4 |
405 | reader => { 'reader' => \&Class::MOP::Attribute::reader }, |
406 | predicate => { 'has_reader' => \&Class::MOP::Attribute::has_reader }, |
7b31baf4 |
407 | )) |
408 | ); |
409 | |
410 | Class::MOP::Attribute->meta->add_attribute( |
0ab65f99 |
411 | Class::MOP::Attribute->new('$!initializer' => ( |
412 | init_arg => 'initializer', |
8ee74136 |
413 | reader => { 'initializer' => \&Class::MOP::Attribute::initializer }, |
414 | predicate => { 'has_initializer' => \&Class::MOP::Attribute::has_initializer }, |
0ab65f99 |
415 | )) |
416 | ); |
417 | |
418 | Class::MOP::Attribute->meta->add_attribute( |
c23184fc |
419 | Class::MOP::Attribute->new('$!writer' => ( |
420 | init_arg => 'writer', |
6d2118a4 |
421 | reader => { 'writer' => \&Class::MOP::Attribute::writer }, |
422 | predicate => { 'has_writer' => \&Class::MOP::Attribute::has_writer }, |
7b31baf4 |
423 | )) |
424 | ); |
425 | |
426 | Class::MOP::Attribute->meta->add_attribute( |
c23184fc |
427 | Class::MOP::Attribute->new('$!predicate' => ( |
428 | init_arg => 'predicate', |
6d2118a4 |
429 | reader => { 'predicate' => \&Class::MOP::Attribute::predicate }, |
430 | predicate => { 'has_predicate' => \&Class::MOP::Attribute::has_predicate }, |
7b31baf4 |
431 | )) |
432 | ); |
433 | |
434 | Class::MOP::Attribute->meta->add_attribute( |
c23184fc |
435 | Class::MOP::Attribute->new('$!clearer' => ( |
436 | init_arg => 'clearer', |
6d2118a4 |
437 | reader => { 'clearer' => \&Class::MOP::Attribute::clearer }, |
438 | predicate => { 'has_clearer' => \&Class::MOP::Attribute::has_clearer }, |
7d28758b |
439 | )) |
440 | ); |
441 | |
442 | Class::MOP::Attribute->meta->add_attribute( |
1d68af04 |
443 | Class::MOP::Attribute->new('$!builder' => ( |
444 | init_arg => 'builder', |
445 | reader => { 'builder' => \&Class::MOP::Attribute::builder }, |
446 | predicate => { 'has_builder' => \&Class::MOP::Attribute::has_builder }, |
447 | )) |
448 | ); |
449 | |
450 | Class::MOP::Attribute->meta->add_attribute( |
c23184fc |
451 | Class::MOP::Attribute->new('$!init_arg' => ( |
452 | init_arg => 'init_arg', |
6d2118a4 |
453 | reader => { 'init_arg' => \&Class::MOP::Attribute::init_arg }, |
454 | predicate => { 'has_init_arg' => \&Class::MOP::Attribute::has_init_arg }, |
7b31baf4 |
455 | )) |
456 | ); |
457 | |
458 | Class::MOP::Attribute->meta->add_attribute( |
c23184fc |
459 | Class::MOP::Attribute->new('$!default' => ( |
460 | init_arg => 'default', |
7b31baf4 |
461 | # default has a custom 'reader' method ... |
1d68af04 |
462 | predicate => { 'has_default' => \&Class::MOP::Attribute::has_default }, |
7b31baf4 |
463 | )) |
464 | ); |
465 | |
3545c727 |
466 | Class::MOP::Attribute->meta->add_attribute( |
c23184fc |
467 | Class::MOP::Attribute->new('@!associated_methods' => ( |
468 | init_arg => 'associated_methods', |
469 | reader => { 'associated_methods' => \&Class::MOP::Attribute::associated_methods }, |
1d68af04 |
470 | default => sub { [] } |
3545c727 |
471 | )) |
472 | ); |
727919c5 |
473 | |
474 | # NOTE: (meta-circularity) |
475 | # This should be one of the last things done |
476 | # it will "tie the knot" with Class::MOP::Attribute |
1d68af04 |
477 | # so that it uses the attributes meta-objects |
478 | # to construct itself. |
727919c5 |
479 | Class::MOP::Attribute->meta->add_method('new' => sub { |
480 | my $class = shift; |
481 | my $name = shift; |
1d68af04 |
482 | my %options = @_; |
483 | |
727919c5 |
484 | (defined $name && $name) |
485 | || confess "You must provide a name for the attribute"; |
1d68af04 |
486 | $options{init_arg} = $name |
5659d76e |
487 | if not exists $options{init_arg}; |
1d68af04 |
488 | |
489 | if(exists $options{builder}){ |
490 | confess("builder must be a defined scalar value which is a method name") |
491 | if ref $options{builder} || !(defined $options{builder}); |
492 | confess("Setting both default and builder is not allowed.") |
493 | if exists $options{default}; |
8fe581e5 |
494 | } else { |
495 | (Class::MOP::Attribute::is_default_a_coderef(\%options)) |
496 | || confess("References are not allowed as default values, you must ". |
3c0a8087 |
497 | "wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])") |
8fe581e5 |
498 | if exists $options{default} && ref $options{default}; |
1d68af04 |
499 | } |
5659d76e |
500 | # return the new object |
501 | $class->meta->new_object(name => $name, %options); |
502 | }); |
503 | |
504 | Class::MOP::Attribute->meta->add_method('clone' => sub { |
a740253a |
505 | my $self = shift; |
1d68af04 |
506 | $self->meta->clone_object($self, @_); |
727919c5 |
507 | }); |
508 | |
f0480c45 |
509 | ## -------------------------------------------------------- |
b6164407 |
510 | ## Class::MOP::Method |
511 | |
512 | Class::MOP::Method->meta->add_attribute( |
c23184fc |
513 | Class::MOP::Attribute->new('&!body' => ( |
514 | init_arg => 'body', |
515 | reader => { 'body' => \&Class::MOP::Method::body }, |
b6164407 |
516 | )) |
517 | ); |
518 | |
4c105333 |
519 | Class::MOP::Method->meta->add_attribute( |
520 | Class::MOP::Attribute->new('$!package_name' => ( |
521 | init_arg => 'package_name', |
522 | reader => { 'package_name' => \&Class::MOP::Method::package_name }, |
523 | )) |
524 | ); |
525 | |
526 | Class::MOP::Method->meta->add_attribute( |
527 | Class::MOP::Attribute->new('$!name' => ( |
528 | init_arg => 'name', |
529 | reader => { 'name' => \&Class::MOP::Method::name }, |
530 | )) |
531 | ); |
532 | |
533 | Class::MOP::Method->meta->add_method('wrap' => sub { |
534 | my $class = shift; |
535 | my $code = shift; |
536 | my %options = @_; |
537 | |
538 | ('CODE' eq (Scalar::Util::reftype($code) || '')) |
539 | || confess "You must supply a CODE reference to bless, not (" . ($code || 'undef') . ")"; |
540 | |
b38f3848 |
541 | ($options{package_name} && $options{name}) |
542 | || confess "You must supply the package_name and name parameters"; |
543 | |
4c105333 |
544 | # return the new object |
545 | $class->meta->new_object(body => $code, %options); |
546 | }); |
547 | |
548 | Class::MOP::Method->meta->add_method('clone' => sub { |
549 | my $self = shift; |
550 | $self->meta->clone_object($self, @_); |
551 | }); |
552 | |
b6164407 |
553 | ## -------------------------------------------------------- |
554 | ## Class::MOP::Method::Wrapped |
555 | |
556 | # NOTE: |
1d68af04 |
557 | # the way this item is initialized, this |
558 | # really does not follow the standard |
559 | # practices of attributes, but we put |
b6164407 |
560 | # it here for completeness |
561 | Class::MOP::Method::Wrapped->meta->add_attribute( |
c23184fc |
562 | Class::MOP::Attribute->new('%!modifier_table') |
b6164407 |
563 | ); |
564 | |
565 | ## -------------------------------------------------------- |
565f0cbb |
566 | ## Class::MOP::Method::Generated |
567 | |
568 | Class::MOP::Method::Generated->meta->add_attribute( |
569 | Class::MOP::Attribute->new('$!is_inline' => ( |
570 | init_arg => 'is_inline', |
571 | reader => { 'is_inline' => \&Class::MOP::Method::Generated::is_inline }, |
4c105333 |
572 | default => 0, |
1d68af04 |
573 | )) |
565f0cbb |
574 | ); |
575 | |
4c105333 |
576 | Class::MOP::Method::Generated->meta->add_method('new' => sub { |
577 | my ($class, %options) = @_; |
b38f3848 |
578 | ($options{package_name} && $options{name}) |
579 | || confess "You must supply the package_name and name parameters"; |
4c105333 |
580 | my $self = $class->meta->new_object(%options); |
581 | $self->initialize_body; |
582 | $self; |
583 | }); |
584 | |
565f0cbb |
585 | ## -------------------------------------------------------- |
d90b42a6 |
586 | ## Class::MOP::Method::Accessor |
587 | |
588 | Class::MOP::Method::Accessor->meta->add_attribute( |
c23184fc |
589 | Class::MOP::Attribute->new('$!attribute' => ( |
590 | init_arg => 'attribute', |
1d68af04 |
591 | reader => { |
592 | 'associated_attribute' => \&Class::MOP::Method::Accessor::associated_attribute |
d90b42a6 |
593 | }, |
1d68af04 |
594 | )) |
d90b42a6 |
595 | ); |
596 | |
597 | Class::MOP::Method::Accessor->meta->add_attribute( |
c23184fc |
598 | Class::MOP::Attribute->new('$!accessor_type' => ( |
599 | init_arg => 'accessor_type', |
600 | reader => { 'accessor_type' => \&Class::MOP::Method::Accessor::accessor_type }, |
1d68af04 |
601 | )) |
d90b42a6 |
602 | ); |
603 | |
4c105333 |
604 | Class::MOP::Method::Accessor->meta->add_method('new' => sub { |
605 | my $class = shift; |
606 | my %options = @_; |
607 | |
608 | (exists $options{attribute}) |
609 | || confess "You must supply an attribute to construct with"; |
610 | |
611 | (exists $options{accessor_type}) |
612 | || confess "You must supply an accessor_type to construct with"; |
613 | |
614 | (Scalar::Util::blessed($options{attribute}) && $options{attribute}->isa('Class::MOP::Attribute')) |
615 | || confess "You must supply an attribute which is a 'Class::MOP::Attribute' instance"; |
616 | |
b38f3848 |
617 | ($options{package_name} && $options{name}) |
618 | || confess "You must supply the package_name and name parameters"; |
619 | |
4c105333 |
620 | # return the new object |
621 | my $self = $class->meta->new_object(%options); |
622 | |
623 | # we don't want this creating |
624 | # a cycle in the code, if not |
625 | # needed |
626 | Scalar::Util::weaken($self->{'$!attribute'}); |
627 | |
628 | $self->initialize_body; |
629 | |
630 | $self; |
631 | }); |
632 | |
d90b42a6 |
633 | |
634 | ## -------------------------------------------------------- |
635 | ## Class::MOP::Method::Constructor |
636 | |
637 | Class::MOP::Method::Constructor->meta->add_attribute( |
c23184fc |
638 | Class::MOP::Attribute->new('%!options' => ( |
639 | init_arg => 'options', |
1d68af04 |
640 | reader => { |
641 | 'options' => \&Class::MOP::Method::Constructor::options |
d90b42a6 |
642 | }, |
4c105333 |
643 | default => sub { +{} } |
1d68af04 |
644 | )) |
d90b42a6 |
645 | ); |
646 | |
647 | Class::MOP::Method::Constructor->meta->add_attribute( |
c23184fc |
648 | Class::MOP::Attribute->new('$!associated_metaclass' => ( |
649 | init_arg => 'metaclass', |
1d68af04 |
650 | reader => { |
651 | 'associated_metaclass' => \&Class::MOP::Method::Constructor::associated_metaclass |
652 | }, |
653 | )) |
d90b42a6 |
654 | ); |
655 | |
4c105333 |
656 | Class::MOP::Method::Constructor->meta->add_method('new' => sub { |
657 | my $class = shift; |
658 | my %options = @_; |
659 | |
660 | (Scalar::Util::blessed $options{metaclass} && $options{metaclass}->isa('Class::MOP::Class')) |
661 | || confess "You must pass a metaclass instance if you want to inline" |
662 | if $options{is_inline}; |
663 | |
b38f3848 |
664 | ($options{package_name} && $options{name}) |
665 | || confess "You must supply the package_name and name parameters"; |
666 | |
4c105333 |
667 | # return the new object |
668 | my $self = $class->meta->new_object(%options); |
669 | |
670 | # we don't want this creating |
671 | # a cycle in the code, if not |
672 | # needed |
673 | Scalar::Util::weaken($self->{'$!associated_metaclass'}); |
674 | |
675 | $self->initialize_body; |
676 | |
677 | $self; |
678 | }); |
679 | |
d90b42a6 |
680 | ## -------------------------------------------------------- |
86482605 |
681 | ## Class::MOP::Instance |
682 | |
683 | # NOTE: |
1d68af04 |
684 | # these don't yet do much of anything, but are just |
86482605 |
685 | # included for completeness |
686 | |
687 | Class::MOP::Instance->meta->add_attribute( |
c23184fc |
688 | Class::MOP::Attribute->new('$!meta') |
86482605 |
689 | ); |
690 | |
691 | Class::MOP::Instance->meta->add_attribute( |
c23184fc |
692 | Class::MOP::Attribute->new('@!slots') |
86482605 |
693 | ); |
694 | |
695 | ## -------------------------------------------------------- |
f0480c45 |
696 | ## Now close all the Class::MOP::* classes |
4d47b77f |
697 | |
0b9372a2 |
698 | # NOTE: |
1d68af04 |
699 | # we don't need to inline the |
700 | # constructors or the accessors |
701 | # this only lengthens the compile |
702 | # time of the MOP, and gives us |
0b9372a2 |
703 | # no actual benefits. |
704 | |
705 | $_->meta->make_immutable( |
706 | inline_constructor => 0, |
707 | inline_accessors => 0, |
708 | ) for qw/ |
1d68af04 |
709 | Class::MOP::Package |
710 | Class::MOP::Module |
711 | Class::MOP::Class |
712 | |
0b9372a2 |
713 | Class::MOP::Attribute |
1d68af04 |
714 | Class::MOP::Method |
715 | Class::MOP::Instance |
716 | |
717 | Class::MOP::Object |
0b9372a2 |
718 | |
565f0cbb |
719 | Class::MOP::Method::Generated |
1d68af04 |
720 | |
ba38bf08 |
721 | Class::MOP::Method::Accessor |
1d68af04 |
722 | Class::MOP::Method::Constructor |
723 | Class::MOP::Method::Wrapped |
0b9372a2 |
724 | /; |
b6164407 |
725 | |
94b19069 |
726 | 1; |
727 | |
728 | __END__ |
729 | |
730 | =pod |
731 | |
1d68af04 |
732 | =head1 NAME |
94b19069 |
733 | |
734 | Class::MOP - A Meta Object Protocol for Perl 5 |
735 | |
94b19069 |
736 | =head1 DESCRIPTON |
737 | |
127d39a7 |
738 | This module is a fully functioning meta object protocol for the |
1d68af04 |
739 | Perl 5 object system. It makes no attempt to change the behavior or |
740 | characteristics of the Perl 5 object system, only to create a |
27e31eaf |
741 | protocol for its manipulation and introspection. |
94b19069 |
742 | |
1d68af04 |
743 | That said, it does attempt to create the tools for building a rich |
744 | set of extensions to the Perl 5 object system. Every attempt has been |
745 | made for these tools to keep to the spirit of the Perl 5 object |
94b19069 |
746 | system that we all know and love. |
747 | |
1d68af04 |
748 | This documentation is admittedly sparse on details, as time permits |
749 | I will try to improve them. For now, I suggest looking at the items |
750 | listed in the L<SEE ALSO> section for more information. In particular |
751 | the book "The Art of the Meta Object Protocol" was very influential |
40483095 |
752 | in the development of this system. |
753 | |
bfe4d0fc |
754 | =head2 What is a Meta Object Protocol? |
755 | |
1d68af04 |
756 | A meta object protocol is an API to an object system. |
bfe4d0fc |
757 | |
1d68af04 |
758 | To be more specific, it is a set of abstractions of the components of |
759 | an object system (typically things like; classes, object, methods, |
760 | object attributes, etc.). These abstractions can then be used to both |
bfe4d0fc |
761 | inspect and manipulate the object system which they describe. |
762 | |
1d68af04 |
763 | It can be said that there are two MOPs for any object system; the |
764 | implicit MOP, and the explicit MOP. The implicit MOP handles things |
765 | like method dispatch or inheritance, which happen automatically as |
766 | part of how the object system works. The explicit MOP typically |
767 | handles the introspection/reflection features of the object system. |
768 | All object systems have implicit MOPs, without one, they would not |
769 | work. Explict MOPs however as less common, and depending on the |
770 | language can vary from restrictive (Reflection in Java or C#) to |
771 | wide open (CLOS is a perfect example). |
bfe4d0fc |
772 | |
e16da3e6 |
773 | =head2 Yet Another Class Builder!! Why? |
774 | |
1d68af04 |
775 | This is B<not> a class builder so much as it is a I<class builder |
776 | B<builder>>. My intent is that an end user does not use this module |
777 | directly, but instead this module is used by module authors to |
778 | build extensions and features onto the Perl 5 object system. |
e16da3e6 |
779 | |
94b19069 |
780 | =head2 Who is this module for? |
781 | |
1d68af04 |
782 | This module is specifically for anyone who has ever created or |
783 | wanted to create a module for the Class:: namespace. The tools which |
784 | this module will provide will hopefully make it easier to do more |
785 | complex things with Perl 5 classes by removing such barriers as |
786 | the need to hack the symbol tables, or understand the fine details |
787 | of method dispatch. |
94b19069 |
788 | |
bfe4d0fc |
789 | =head2 What changes do I have to make to use this module? |
790 | |
1d68af04 |
791 | This module was designed to be as unintrusive as possible. Many of |
792 | its features are accessible without B<any> change to your existsing |
793 | code at all. It is meant to be a compliment to your existing code and |
794 | not an intrusion on your code base. Unlike many other B<Class::> |
795 | modules, this module B<does not> require you subclass it, or even that |
796 | you C<use> it in within your module's package. |
bfe4d0fc |
797 | |
1d68af04 |
798 | The only features which requires additions to your code are the |
2eb717d5 |
799 | attribute handling and instance construction features, and these are |
1d68af04 |
800 | both completely optional features. The only reason for this is because |
801 | Perl 5's object system does not actually have these features built |
2eb717d5 |
802 | in. More information about this feature can be found below. |
bfe4d0fc |
803 | |
804 | =head2 A Note about Performance? |
805 | |
1d68af04 |
806 | It is a common misconception that explict MOPs are performance drains. |
807 | But this is not a universal truth at all, it is an side-effect of |
808 | specific implementations. For instance, using Java reflection is much |
809 | slower because the JVM cannot take advantage of any compiler |
810 | optimizations, and the JVM has to deal with much more runtime type |
811 | information as well. Reflection in C# is marginally better as it was |
812 | designed into the language and runtime (the CLR). In contrast, CLOS |
813 | (the Common Lisp Object System) was built to support an explicit MOP, |
814 | and so performance is tuned for it. |
815 | |
816 | This library in particular does it's absolute best to avoid putting |
817 | B<any> drain at all upon your code's performance. In fact, by itself |
818 | it does nothing to affect your existing code. So you only pay for |
2eb717d5 |
819 | what you actually use. |
bfe4d0fc |
820 | |
550d56db |
821 | =head2 About Metaclass compatibility |
822 | |
1d68af04 |
823 | This module makes sure that all metaclasses created are both upwards |
824 | and downwards compatible. The topic of metaclass compatibility is |
825 | highly esoteric and is something only encountered when doing deep and |
826 | involved metaclass hacking. There are two basic kinds of metaclass |
827 | incompatibility; upwards and downwards. |
550d56db |
828 | |
1d68af04 |
829 | Upwards metaclass compatibility means that the metaclass of a |
830 | given class is either the same as (or a subclass of) all of the |
550d56db |
831 | class's ancestors. |
832 | |
1d68af04 |
833 | Downward metaclass compatibility means that the metaclasses of a |
834 | given class's anscestors are all either the same as (or a subclass |
550d56db |
835 | of) that metaclass. |
836 | |
1d68af04 |
837 | Here is a diagram showing a set of two classes (C<A> and C<B>) and |
838 | two metaclasses (C<Meta::A> and C<Meta::B>) which have correct |
550d56db |
839 | metaclass compatibility both upwards and downwards. |
840 | |
841 | +---------+ +---------+ |
842 | | Meta::A |<----| Meta::B | <....... (instance of ) |
1d68af04 |
843 | +---------+ +---------+ <------- (inherits from) |
550d56db |
844 | ^ ^ |
845 | : : |
846 | +---------+ +---------+ |
847 | | A |<----| B | |
848 | +---------+ +---------+ |
849 | |
1d68af04 |
850 | As I said this is a highly esoteric topic and one you will only run |
851 | into if you do a lot of subclassing of B<Class::MOP::Class>. If you |
852 | are interested in why this is an issue see the paper |
853 | I<Uniform and safe metaclass composition> linked to in the |
550d56db |
854 | L<SEE ALSO> section of this document. |
855 | |
aa448b16 |
856 | =head2 Using custom metaclasses |
857 | |
1d68af04 |
858 | Always use the metaclass pragma when using a custom metaclass, this |
859 | will ensure the proper initialization order and not accidentely |
860 | create an incorrect type of metaclass for you. This is a very rare |
861 | problem, and one which can only occur if you are doing deep metaclass |
aa448b16 |
862 | programming. So in other words, don't worry about it. |
863 | |
94b19069 |
864 | =head1 PROTOCOLS |
865 | |
127d39a7 |
866 | The protocol is divided into 4 main sub-protocols: |
94b19069 |
867 | |
868 | =over 4 |
869 | |
870 | =item The Class protocol |
871 | |
1d68af04 |
872 | This provides a means of manipulating and introspecting a Perl 5 |
873 | class. It handles all of symbol table hacking for you, and provides |
94b19069 |
874 | a rich set of methods that go beyond simple package introspection. |
875 | |
552e3d24 |
876 | See L<Class::MOP::Class> for more details. |
877 | |
94b19069 |
878 | =item The Attribute protocol |
879 | |
1d68af04 |
880 | This provides a consistent represenation for an attribute of a |
881 | Perl 5 class. Since there are so many ways to create and handle |
127d39a7 |
882 | attributes in Perl 5 OO, this attempts to provide as much of a |
1d68af04 |
883 | unified approach as possible, while giving the freedom and |
94b19069 |
884 | flexibility to subclass for specialization. |
885 | |
552e3d24 |
886 | See L<Class::MOP::Attribute> for more details. |
887 | |
94b19069 |
888 | =item The Method protocol |
889 | |
1d68af04 |
890 | This provides a means of manipulating and introspecting methods in |
891 | the Perl 5 object system. As with attributes, there are many ways to |
892 | approach this topic, so we try to keep it pretty basic, while still |
94b19069 |
893 | making it possible to extend the system in many ways. |
894 | |
552e3d24 |
895 | See L<Class::MOP::Method> for more details. |
94b19069 |
896 | |
127d39a7 |
897 | =item The Instance protocol |
898 | |
899 | This provides a layer of abstraction for creating object instances. |
900 | Since the other layers use this protocol, it is relatively easy to |
901 | change the type of your instances from the default HASH ref to other |
902 | types of references. Several examples are provided in the F<examples/> |
903 | directory included in this distribution. |
904 | |
905 | See L<Class::MOP::Instance> for more details. |
906 | |
94b19069 |
907 | =back |
908 | |
be7677c7 |
909 | =head1 FUNCTIONS |
910 | |
c1d5345a |
911 | =head2 Constants |
912 | |
913 | =over 4 |
914 | |
915 | =item I<IS_RUNNING_ON_5_10> |
916 | |
917 | We set this constant depending on what version perl we are on, this |
918 | allows us to take advantage of new 5.10 features and stay backwards |
919 | compat. |
920 | |
921 | =back |
922 | |
448b6e55 |
923 | =head2 Utility functions |
924 | |
925 | =over 4 |
926 | |
927 | =item B<load_class ($class_name)> |
928 | |
1d68af04 |
929 | This will load a given C<$class_name> and if it does not have an |
448b6e55 |
930 | already initialized metaclass, then it will intialize one for it. |
127d39a7 |
931 | This function can be used in place of tricks like |
932 | C<eval "use $module"> or using C<require>. |
448b6e55 |
933 | |
934 | =item B<is_class_loaded ($class_name)> |
935 | |
1d68af04 |
936 | This will return a boolean depending on if the C<$class_name> has |
937 | been loaded. |
448b6e55 |
938 | |
1d68af04 |
939 | NOTE: This does a basic check of the symbol table to try and |
448b6e55 |
940 | determine as best it can if the C<$class_name> is loaded, it |
1d68af04 |
941 | is probably correct about 99% of the time. |
448b6e55 |
942 | |
b1f5f41d |
943 | =item B<check_package_cache_flag ($pkg)> |
e0e4674a |
944 | |
127d39a7 |
945 | This will return an integer that is managed by C<Class::MOP::Class> |
946 | to determine if a module's symbol table has been altered. |
947 | |
948 | In Perl 5.10 or greater, this flag is package specific. However in |
949 | versions prior to 5.10, this will use the C<PL_sub_generation> variable |
950 | which is not package specific. |
951 | |
e0e4674a |
952 | =item B<get_code_info ($code)> |
953 | |
127d39a7 |
954 | This function returns two values, the name of the package the C<$code> |
955 | is from and the name of the C<$code> itself. This is used by several |
956 | elements of the MOP to detemine where a given C<$code> reference is from. |
957 | |
4c105333 |
958 | =item B<subname ($name, $code)> |
959 | |
960 | B<NOTE: DO NOT USE THIS FUNCTION, IT IS FOR INTERNAL USE ONLY!> |
961 | |
962 | If possible, we will load the L<Sub::Name> module and this will function |
963 | as C<Sub::Name::subname> does, otherwise it will just return the C<$code> |
964 | argument. |
965 | |
448b6e55 |
966 | =back |
967 | |
968 | =head2 Metaclass cache functions |
969 | |
1d68af04 |
970 | Class::MOP holds a cache of metaclasses, the following are functions |
971 | (B<not methods>) which can be used to access that cache. It is not |
972 | recommended that you mess with this, bad things could happen. But if |
be7677c7 |
973 | you are brave and willing to risk it, go for it. |
974 | |
975 | =over 4 |
976 | |
977 | =item B<get_all_metaclasses> |
978 | |
1d68af04 |
979 | This will return an hash of all the metaclass instances that have |
980 | been cached by B<Class::MOP::Class> keyed by the package name. |
b9d9fc0b |
981 | |
be7677c7 |
982 | =item B<get_all_metaclass_instances> |
983 | |
1d68af04 |
984 | This will return an array of all the metaclass instances that have |
b9d9fc0b |
985 | been cached by B<Class::MOP::Class>. |
986 | |
be7677c7 |
987 | =item B<get_all_metaclass_names> |
988 | |
1d68af04 |
989 | This will return an array of all the metaclass names that have |
b9d9fc0b |
990 | been cached by B<Class::MOP::Class>. |
991 | |
be7677c7 |
992 | =item B<get_metaclass_by_name ($name)> |
993 | |
127d39a7 |
994 | This will return a cached B<Class::MOP::Class> instance of nothing |
995 | if no metaclass exist by that C<$name>. |
996 | |
be7677c7 |
997 | =item B<store_metaclass_by_name ($name, $meta)> |
998 | |
127d39a7 |
999 | This will store a metaclass in the cache at the supplied C<$key>. |
1000 | |
be7677c7 |
1001 | =item B<weaken_metaclass ($name)> |
1002 | |
127d39a7 |
1003 | In rare cases it is desireable to store a weakened reference in |
1004 | the metaclass cache. This function will weaken the reference to |
1005 | the metaclass stored in C<$name>. |
1006 | |
be7677c7 |
1007 | =item B<does_metaclass_exist ($name)> |
1008 | |
127d39a7 |
1009 | This will return true of there exists a metaclass stored in the |
1010 | C<$name> key and return false otherwise. |
1011 | |
be7677c7 |
1012 | =item B<remove_metaclass_by_name ($name)> |
1013 | |
127d39a7 |
1014 | This will remove a the metaclass stored in the C<$name> key. |
1015 | |
be7677c7 |
1016 | =back |
1017 | |
552e3d24 |
1018 | =head1 SEE ALSO |
8b978dd5 |
1019 | |
552e3d24 |
1020 | =head2 Books |
8b978dd5 |
1021 | |
1d68af04 |
1022 | There are very few books out on Meta Object Protocols and Metaclasses |
1023 | because it is such an esoteric topic. The following books are really |
1024 | the only ones I have found. If you know of any more, B<I<please>> |
a2e85e6c |
1025 | email me and let me know, I would love to hear about them. |
1026 | |
8b978dd5 |
1027 | =over 4 |
1028 | |
552e3d24 |
1029 | =item "The Art of the Meta Object Protocol" |
8b978dd5 |
1030 | |
552e3d24 |
1031 | =item "Advances in Object-Oriented Metalevel Architecture and Reflection" |
8b978dd5 |
1032 | |
b51af7f9 |
1033 | =item "Putting MetaClasses to Work" |
1034 | |
a2e85e6c |
1035 | =item "Smalltalk: The Language" |
1036 | |
94b19069 |
1037 | =back |
1038 | |
550d56db |
1039 | =head2 Papers |
1040 | |
1041 | =over 4 |
1042 | |
1043 | =item Uniform and safe metaclass composition |
1044 | |
1d68af04 |
1045 | An excellent paper by the people who brought us the original Traits paper. |
1046 | This paper is on how Traits can be used to do safe metaclass composition, |
1047 | and offers an excellent introduction section which delves into the topic of |
550d56db |
1048 | metaclass compatibility. |
1049 | |
1050 | L<http://www.iam.unibe.ch/~scg/Archive/Papers/Duca05ySafeMetaclassTrait.pdf> |
1051 | |
1052 | =item Safe Metaclass Programming |
1053 | |
1d68af04 |
1054 | This paper seems to precede the above paper, and propose a mix-in based |
1055 | approach as opposed to the Traits based approach. Both papers have similar |
1056 | information on the metaclass compatibility problem space. |
550d56db |
1057 | |
1058 | L<http://citeseer.ist.psu.edu/37617.html> |
1059 | |
1060 | =back |
1061 | |
552e3d24 |
1062 | =head2 Prior Art |
8b978dd5 |
1063 | |
1064 | =over 4 |
1065 | |
7184ca14 |
1066 | =item The Perl 6 MetaModel work in the Pugs project |
8b978dd5 |
1067 | |
1068 | =over 4 |
1069 | |
552e3d24 |
1070 | =item L<http://svn.openfoundry.org/pugs/perl5/Perl6-MetaModel> |
8b978dd5 |
1071 | |
552e3d24 |
1072 | =item L<http://svn.openfoundry.org/pugs/perl5/Perl6-ObjectSpace> |
8b978dd5 |
1073 | |
1074 | =back |
1075 | |
94b19069 |
1076 | =back |
1077 | |
1d68af04 |
1078 | =head2 Articles |
f8dfcfb7 |
1079 | |
1080 | =over 4 |
1081 | |
1d68af04 |
1082 | =item CPAN Module Review of Class::MOP |
f8dfcfb7 |
1083 | |
1084 | L<http://www.oreillynet.com/onlamp/blog/2006/06/cpan_module_review_classmop.html> |
1085 | |
1086 | =back |
1087 | |
a2e85e6c |
1088 | =head1 SIMILAR MODULES |
1089 | |
1d68af04 |
1090 | As I have said above, this module is a class-builder-builder, so it is |
1091 | not the same thing as modules like L<Class::Accessor> and |
1092 | L<Class::MethodMaker>. That being said there are very few modules on CPAN |
1093 | with similar goals to this module. The one I have found which is most |
1094 | like this module is L<Class::Meta>, although it's philosophy and the MOP it |
1095 | creates are very different from this modules. |
94b19069 |
1096 | |
a2e85e6c |
1097 | =head1 BUGS |
1098 | |
1d68af04 |
1099 | All complex software has bugs lurking in it, and this module is no |
a2e85e6c |
1100 | exception. If you find a bug please either email me, or add the bug |
1101 | to cpan-RT. |
1102 | |
1103 | =head1 ACKNOWLEDGEMENTS |
1104 | |
1105 | =over 4 |
1106 | |
b9d9fc0b |
1107 | =item Rob Kinyon |
a2e85e6c |
1108 | |
1d68af04 |
1109 | Thanks to Rob for actually getting the development of this module kick-started. |
a2e85e6c |
1110 | |
1111 | =back |
1112 | |
1a09d9cc |
1113 | =head1 AUTHORS |
94b19069 |
1114 | |
a2e85e6c |
1115 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
552e3d24 |
1116 | |
9c8cda90 |
1117 | B<with contributions from:> |
1118 | |
1119 | Brandon (blblack) Black |
1120 | |
1121 | Guillermo (groditi) Roditi |
1122 | |
9195ddff |
1123 | Matt (mst) Trout |
1124 | |
9c8cda90 |
1125 | Rob (robkinyon) Kinyon |
1126 | |
1127 | Yuval (nothingmuch) Kogman |
1a09d9cc |
1128 | |
f430cfa4 |
1129 | Scott (konobi) McWhirter |
1130 | |
94b19069 |
1131 | =head1 COPYRIGHT AND LICENSE |
1132 | |
69e3ab0a |
1133 | Copyright 2006-2008 by Infinity Interactive, Inc. |
94b19069 |
1134 | |
1135 | L<http://www.iinteractive.com> |
1136 | |
1137 | This library is free software; you can redistribute it and/or modify |
1d68af04 |
1138 | it under the same terms as Perl itself. |
94b19069 |
1139 | |
1140 | =cut |