Commit | Line | Data |
b1eebd55 |
1 | package Moo; |
6c74d087 |
2 | |
3 | use strictures 1; |
b1eebd55 |
4 | use Moo::_Utils; |
e0e12d16 |
5 | use B 'perlstring'; |
a41e15c3 |
6 | use Sub::Defer (); |
6c74d087 |
7 | |
ef5bce02 |
8 | our $VERSION = '0.091004'; # 0.91.4 |
6d71fae7 |
9 | $VERSION = eval $VERSION; |
10 | |
c2cb1fed |
11 | require Moo::sification; |
8c46a8f6 |
12 | |
14f32032 |
13 | our %MAKERS; |
14 | |
6c74d087 |
15 | sub import { |
16 | my $target = caller; |
a16d301e |
17 | my $class = shift; |
de3d4906 |
18 | strictures->import; |
1ba11455 |
19 | return if $MAKERS{$target}; # already exported into this package |
167455a0 |
20 | _install_coderef "${target}::extends" => "Moo::extends" => sub { |
fb5074f6 |
21 | _load_module($_) for @_; |
786e5ba0 |
22 | # Can't do *{...} = \@_ or 5.10.0's mro.pm stops seeing @ISA |
23 | @{*{_getglob("${target}::ISA")}{ARRAY}} = @_; |
3b0d7efd |
24 | if (my $old = delete $Moo::MAKERS{$target}{constructor}) { |
25 | delete _getstash($target)->{new}; |
26 | Moo->_constructor_maker_for($target) |
27 | ->register_attribute_specs(%{$old->all_attribute_specs}); |
28 | } |
c100c04c |
29 | $Moo::HandleMoose::MOUSE{$target} = [ |
30 | grep defined, map Mouse::Util::find_meta($_), @_ |
31 | ] if $INC{"Mouse.pm"}; |
6c49212f |
32 | $class->_maybe_reset_handlemoose($target); |
6c74d087 |
33 | }; |
167455a0 |
34 | _install_coderef "${target}::with" => "Moo::with" => sub { |
faa9ce11 |
35 | require Moo::Role; |
6893ea30 |
36 | Moo::Role->apply_roles_to_package($target, $_[0]); |
6c49212f |
37 | $class->_maybe_reset_handlemoose($target); |
6c74d087 |
38 | }; |
a16d301e |
39 | $MAKERS{$target} = {}; |
167455a0 |
40 | _install_coderef "${target}::has" => "Moo::has" => sub { |
14f32032 |
41 | my ($name, %spec) = @_; |
a16d301e |
42 | $class->_constructor_maker_for($target) |
43 | ->register_attribute_specs($name, \%spec); |
02e9ef74 |
44 | $class->_accessor_maker_for($target) |
45 | ->generate_method($target, $name, \%spec); |
6c49212f |
46 | $class->_maybe_reset_handlemoose($target); |
14f32032 |
47 | }; |
6c74d087 |
48 | foreach my $type (qw(before after around)) { |
167455a0 |
49 | _install_coderef "${target}::${type}" => "Moo::${type}" => sub { |
faa9ce11 |
50 | require Class::Method::Modifiers; |
6c74d087 |
51 | _install_modifier($target, $type, @_); |
52 | }; |
53 | } |
54 | { |
55 | no strict 'refs'; |
56 | @{"${target}::ISA"} = do { |
faa9ce11 |
57 | require Moo::Object; ('Moo::Object'); |
6c74d087 |
58 | } unless @{"${target}::ISA"}; |
59 | } |
3362e41c |
60 | if ($INC{'Moo/HandleMoose.pm'}) { |
61 | Moo::HandleMoose::inject_fake_metaclass_for($target); |
62 | } |
6c74d087 |
63 | } |
64 | |
6c49212f |
65 | sub _maybe_reset_handlemoose { |
66 | my ($class, $target) = @_; |
67 | if ($INC{"Moo/HandleMoose.pm"}) { |
68 | Moo::HandleMoose::maybe_reinject_fake_metaclass_for($target); |
69 | } |
70 | } |
71 | |
02e9ef74 |
72 | sub _accessor_maker_for { |
73 | my ($class, $target) = @_; |
74 | return unless $MAKERS{$target}; |
75 | $MAKERS{$target}{accessor} ||= do { |
76 | my $maker_class = do { |
77 | if (my $m = do { |
78 | if (my $defer_target = |
79 | (Sub::Defer::defer_info($target->can('new'))||[])->[0] |
80 | ) { |
81 | my ($pkg) = ($defer_target =~ /^(.*)::[^:]+$/); |
82 | $MAKERS{$pkg} && $MAKERS{$pkg}{accessor}; |
83 | } else { |
84 | undef; |
85 | } |
86 | }) { |
87 | ref($m); |
88 | } else { |
89 | require Method::Generate::Accessor; |
90 | 'Method::Generate::Accessor' |
91 | } |
92 | }; |
93 | $maker_class->new; |
94 | } |
95 | } |
96 | |
a16d301e |
97 | sub _constructor_maker_for { |
c4570291 |
98 | my ($class, $target, $select_super) = @_; |
a16d301e |
99 | return unless $MAKERS{$target}; |
100 | $MAKERS{$target}{constructor} ||= do { |
faa9ce11 |
101 | require Method::Generate::Constructor; |
102 | require Sub::Defer; |
c4570291 |
103 | my ($moo_constructor, $con); |
de5c0e53 |
104 | |
c4570291 |
105 | if ($select_super && $MAKERS{$select_super}) { |
106 | $moo_constructor = 1; |
107 | $con = $MAKERS{$select_super}{constructor}; |
108 | } else { |
de5c0e53 |
109 | my $t_new = $target->can('new'); |
c4570291 |
110 | if ($t_new) { |
111 | if ($t_new == Moo::Object->can('new')) { |
112 | $moo_constructor = 1; |
113 | } elsif (my $defer_target = (Sub::Defer::defer_info($t_new)||[])->[0]) { |
114 | my ($pkg) = ($defer_target =~ /^(.*)::[^:]+$/); |
115 | if ($MAKERS{$pkg}) { |
116 | $moo_constructor = 1; |
117 | $con = $MAKERS{$pkg}{constructor}; |
118 | } |
119 | } |
120 | } else { |
121 | $moo_constructor = 1; # no other constructor, make a Moo one |
122 | } |
de5c0e53 |
123 | }; |
02e9ef74 |
124 | ($con ? ref($con) : 'Method::Generate::Constructor') |
a16d301e |
125 | ->new( |
126 | package => $target, |
02e9ef74 |
127 | accessor_generator => $class->_accessor_maker_for($target), |
53875e2c |
128 | construction_string => ( |
129 | $moo_constructor |
130 | ? ($con ? $con->construction_string : undef) |
131 | : ('$class->'.$target.'::SUPER::new(@_)') |
e0e12d16 |
132 | ), |
76ab3977 |
133 | subconstructor_handler => ( |
134 | ' if ($Moo::MAKERS{$class}) {'."\n" |
135 | .' '.$class.'->_constructor_maker_for($class,'.perlstring($target).');'."\n" |
136 | .' return $class->new(@_)'.";\n" |
137 | .' }'."\n" |
e0e12d16 |
138 | ), |
a16d301e |
139 | ) |
140 | ->install_delayed |
de5c0e53 |
141 | ->register_attribute_specs(%{$con?$con->all_attribute_specs:{}}) |
a16d301e |
142 | } |
143 | } |
144 | |
6c74d087 |
145 | 1; |
a17be455 |
146 | =pod |
147 | |
148 | =encoding utf-8 |
8146585e |
149 | |
505f8b7a |
150 | =head1 NAME |
151 | |
152 | Moo - Minimalist Object Orientation (with Moose compatiblity) |
153 | |
8146585e |
154 | =head1 SYNOPSIS |
155 | |
156 | package Cat::Food; |
157 | |
158 | use Moo; |
159 | use Sub::Quote; |
160 | |
161 | sub feed_lion { |
162 | my $self = shift; |
163 | my $amount = shift || 1; |
164 | |
165 | $self->pounds( $self->pounds - $amount ); |
166 | } |
167 | |
168 | has taste => ( |
169 | is => 'ro', |
170 | ); |
171 | |
172 | has brand => ( |
173 | is => 'ro', |
174 | isa => sub { |
175 | die "Only SWEET-TREATZ supported!" unless $_[0] eq 'SWEET-TREATZ' |
176 | }, |
177 | ); |
178 | |
179 | has pounds => ( |
180 | is => 'rw', |
181 | isa => quote_sub q{ die "$_[0] is too much cat food!" unless $_[0] < 15 }, |
182 | ); |
183 | |
184 | 1; |
185 | |
186 | and else where |
187 | |
188 | my $full = Cat::Food->new( |
189 | taste => 'DELICIOUS.', |
190 | brand => 'SWEET-TREATZ', |
191 | pounds => 10, |
192 | ); |
193 | |
194 | $full->feed_lion; |
195 | |
196 | say $full->pounds; |
197 | |
198 | =head1 DESCRIPTION |
199 | |
200 | This module is an extremely light-weight, high-performance L<Moose> replacement. |
201 | It also avoids depending on any XS modules to allow simple deployments. The |
202 | name C<Moo> is based on the idea that it provides almost -but not quite- two |
203 | thirds of L<Moose>. |
204 | |
205 | Unlike C<Mouse> this module does not aim at full L<Moose> compatibility. See |
206 | L</INCOMPATIBILITIES> for more details. |
207 | |
5d5bb71d |
208 | =head1 WHY MOO EXISTS |
209 | |
210 | If you want a full object system with a rich Metaprotocol, L<Moose> is |
211 | already wonderful. |
212 | |
213 | I've tried several times to use L<Mouse> but it's 3x the size of Moo and |
214 | takes longer to load than most of my Moo based CGI scripts take to run. |
215 | |
216 | If you don't want L<Moose>, you don't want "less metaprotocol" like L<Mouse>, |
217 | you want "as little as possible" - which means "no metaprotocol", which is |
218 | what Moo provides. |
219 | |
220 | By Moo 1.0 I intend to have Moo's equivalent of L<Any::Moose> built in - |
221 | if Moose gets loaded, any Moo class or role will act as a Moose equivalent |
222 | if treated as such. |
223 | |
224 | Hence - Moo exists as its name - Minimal Object Orientation - with a pledge |
225 | to make it smooth to upgrade to L<Moose> when you need more than minimal |
226 | features. |
227 | |
1fce5bc9 |
228 | =head1 Moo and Moose - NEW, EXPERIMENTAL |
229 | |
230 | If L<Moo> detects L<Moose> being loaded, it will automatically register |
231 | metaclasses for your L<Moo> and L<Moo::Role> packages, so you should be able |
232 | to use them in L<Moose> code without it ever realising you aren't using |
233 | L<Moose> everywhere. |
234 | |
235 | Extending a L<Moose> class or consuming a L<Moose::Role> should also work. |
236 | |
c100c04c |
237 | So should extending a L<Mouse> class or consuming a L<Mouse::Role>. |
238 | |
660f3db2 |
239 | This means that there is no need for anything like L<Any::Moose> for Moo |
c100c04c |
240 | code - Moo and Moose code should simply interoperate without problem. To |
241 | handle L<Mouse> code, you'll likely need an empty Moo role or class consuming |
242 | or extending the L<Mouse> stuff since it doesn't register true L<Moose> |
243 | metaclasses like we do. |
660f3db2 |
244 | |
245 | However, these features are new as of 0.91.0 (0.091000) so while serviceable, |
246 | they are absolutely certain to not be 100% yet; please do report bugs. |
1fce5bc9 |
247 | |
248 | If you need to disable the metaclass creation, add: |
249 | |
250 | no Moo::sification; |
251 | |
252 | to your code before Moose is loaded, but bear in mind that this switch is |
253 | currently global and turns the mechanism off entirely, so don't put this |
254 | in library code, only in a top level script as a temporary measure while |
255 | you send a bug report. |
256 | |
8146585e |
257 | =head1 IMPORTED METHODS |
258 | |
259 | =head2 new |
260 | |
261 | Foo::Bar->new( attr1 => 3 ); |
262 | |
263 | or |
264 | |
265 | Foo::Bar->new({ attr1 => 3 }); |
266 | |
2e575bcd |
267 | =head2 BUILDARGS |
268 | |
f2eac33e |
269 | sub BUILDARGS { |
a17be455 |
270 | my ( $class, @args ) = @_; |
271 | |
272 | unshift @args, "attr1" if @args % 2 == 1; |
273 | |
f2eac33e |
274 | return { @args }; |
a17be455 |
275 | }; |
276 | |
277 | Foo::Bar->new( 3 ); |
278 | |
279 | The default implementation of this method accepts a hash or hash reference of |
280 | named parameters. If it receives a single argument that isn't a hash reference |
281 | it throws an error. |
282 | |
283 | You can override this method in your class to handle other types of options |
284 | passed to the constructor. |
285 | |
286 | This method should always return a hash reference of named options. |
2e575bcd |
287 | |
2d00f3d6 |
288 | =head2 BUILD |
8146585e |
289 | |
2d00f3d6 |
290 | Define a C<BUILD> method on your class and the constructor will automatically |
291 | call the C<BUILD> method from parent down to child after the object has |
292 | been instantiated. Typically this is used for object validation or possibly |
293 | logging. |
8146585e |
294 | |
2d00f3d6 |
295 | =head2 DEMOLISH |
c2cc003f |
296 | |
debb3fcd |
297 | If you have a C<DEMOLISH> method anywhere in your inheritance hierarchy, |
298 | a C<DESTROY> method is created on first object construction which will call |
c2cc003f |
299 | C<< $instance->DEMOLISH($in_global_destruction) >> for each C<DEMOLISH> |
debb3fcd |
300 | method from child upwards to parents. |
301 | |
302 | Note that the C<DESTROY> method is created on first construction of an object |
303 | of your class in order to not add overhead to classes without C<DEMOLISH> |
304 | methods; this may prove slightly surprising if you try and define your own. |
c2cc003f |
305 | |
8146585e |
306 | =head2 does |
307 | |
308 | if ($foo->does('Some::Role1')) { |
309 | ... |
310 | } |
311 | |
312 | Returns true if the object composes in the passed role. |
313 | |
314 | =head1 IMPORTED SUBROUTINES |
315 | |
316 | =head2 extends |
317 | |
318 | extends 'Parent::Class'; |
319 | |
2e575bcd |
320 | Declares base class. Multiple superclasses can be passed for multiple |
321 | inheritance (but please use roles instead). |
322 | |
323 | Calling extends more than once will REPLACE your superclasses, not add to |
324 | them like 'use base' would. |
8146585e |
325 | |
326 | =head2 with |
327 | |
328 | with 'Some::Role1'; |
8146585e |
329 | |
f9755246 |
330 | or |
331 | |
332 | with 'Some::Role1', 'Some::Role2'; |
333 | |
334 | Composes one or more L<Moo::Role> (or L<Role::Tiny>) roles into the current |
335 | class. An error will be raised if these roles have conflicting methods. |
8146585e |
336 | |
337 | =head2 has |
338 | |
339 | has attr => ( |
340 | is => 'ro', |
341 | ); |
342 | |
343 | Declares an attribute for the class. |
344 | |
345 | The options for C<has> are as follows: |
346 | |
347 | =over 2 |
348 | |
349 | =item * is |
350 | |
71db76ce |
351 | B<required>, may be C<ro>, C<rw>, C<lazy> or C<rwp>. |
352 | |
353 | C<ro> generates an accessor that dies if you attempt to write to it - i.e. |
354 | a getter only - by defaulting C<reader> to the name of the attribute. |
355 | |
356 | C<rw> generates a normal getter/setter by defauting C<accessor> to the |
357 | name of the attribute. |
358 | |
359 | C<lazy> generates a reader like C<ro>, but also sets C<lazy> to 1 and |
360 | C<builder> to C<_build_${attribute_name}> to allow on-demand generated |
361 | attributes. This feature was my attempt to fix my incompetence when |
362 | originally designing C<lazy_build>, and is also implemented by |
363 | L<MooseX::AttributeShortcuts>. |
364 | |
365 | C<rwp> generates a reader like C<ro>, but also sets C<writer> to |
366 | C<_set_${attribute_name}> for attributes that are designed to be written |
367 | from inside of the class, but read-only from outside. |
368 | This feature comes from L<MooseX::AttributeShortcuts>. |
8146585e |
369 | |
370 | =item * isa |
371 | |
372 | Takes a coderef which is meant to validate the attribute. Unlike L<Moose> Moo |
373 | does not include a basic type system, so instead of doing C<< isa => 'Num' >>, |
374 | one should do |
375 | |
376 | isa => quote_sub q{ |
377 | die "$_[0] is not a number!" unless looks_like_number $_[0] |
378 | }, |
379 | |
380 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
381 | |
c4074652 |
382 | Since L<Moo> does B<not> run the C<isa> check before C<coerce> if a coercion |
383 | subroutine has been supplied, C<isa> checks are not structural to your code |
384 | and can, if desired, be omitted on non-debug builds (although if this results |
385 | in an uncaught bug causing your program to break, the L<Moo> authors guarantee |
386 | nothing except that you get to keep both halves). |
387 | |
71db76ce |
388 | If you want L<MooseX::Types> style named types, look at |
389 | L<MooX::Types::MooseLike>. |
390 | |
391 | To cause your C<isa> entries to be automatically mapped to named |
392 | L<Moose::Meta::TypeConstraint> objects (rather than the default behaviour |
393 | of creating an anonymous type), set: |
394 | |
395 | $Moo::HandleMoose::TYPE_MAP{$isa_coderef} = sub { |
396 | require MooseX::Types::Something; |
397 | return MooseX::Types::Something::TypeName(); |
398 | }; |
399 | |
400 | Note that this example is purely illustrative; anything that returns a |
401 | L<Moose::Meta::TypeConstraint> object or something similar enough to it to |
402 | make L<Moose> happy is fine. |
403 | |
8146585e |
404 | =item * coerce |
405 | |
406 | Takes a coderef which is meant to coerce the attribute. The basic idea is to |
407 | do something like the following: |
408 | |
409 | coerce => quote_sub q{ |
410 | $_[0] + 1 unless $_[0] % 2 |
411 | }, |
412 | |
c4074652 |
413 | Note that L<Moo> will always fire your coercion - this is to permit |
414 | isa entries to be used purely for bug trapping, whereas coercions are |
415 | always structural to your code. We do, however, apply any supplied C<isa> |
416 | check after the coercion has run to ensure that it returned a valid value. |
8146585e |
417 | |
23a3e34e |
418 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
2e575bcd |
419 | |
e1efec09 |
420 | =item * handles |
421 | |
422 | Takes a string |
423 | |
69673ca7 |
424 | handles => 'RobotRole' |
425 | |
426 | Where C<RobotRole> is a role (L<Moo::Role>) that defines an interface which |
427 | becomes the list of methods to handle. |
e1efec09 |
428 | |
429 | Takes a list of methods |
430 | |
431 | handles => [ qw( one two ) ] |
432 | |
433 | Takes a hashref |
434 | |
435 | handles => { |
436 | un => 'one', |
437 | } |
438 | |
8146585e |
439 | =item * trigger |
440 | |
6fe5100d |
441 | Takes a coderef which will get called any time the attribute is set. This |
442 | includes the constructor. Coderef will be invoked against the object with the |
443 | new value as an argument. |
8146585e |
444 | |
71db76ce |
445 | If you set this to just C<1>, it generates a trigger which calls the |
446 | C<_trigger_${attr_name}> method on C<$self>. This feature comes from |
447 | L<MooseX::AttributeShortcuts>. |
448 | |
2e575bcd |
449 | Note that Moose also passes the old value, if any; this feature is not yet |
450 | supported. |
451 | |
8146585e |
452 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
453 | |
454 | =item * default |
455 | |
2e575bcd |
456 | Takes a coderef which will get called with $self as its only argument |
457 | to populate an attribute if no value is supplied to the constructor - or |
458 | if the attribute is lazy, when the attribute is first retrieved if no |
459 | value has yet been provided. |
460 | |
461 | Note that if your default is fired during new() there is no guarantee that |
462 | other attributes have been populated yet so you should not rely on their |
463 | existence. |
8146585e |
464 | |
465 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
466 | |
467 | =item * predicate |
468 | |
2e575bcd |
469 | Takes a method name which will return true if an attribute has a value. |
8146585e |
470 | |
71db76ce |
471 | If you set this to just C<1>, the predicate is automatically named |
472 | C<has_${attr_name}> if your attribute's name does not start with an |
473 | underscore, or <_has_${attr_name_without_the_underscore}> if it does. |
474 | This feature comes from L<MooseX::AttributeShortcuts>. |
8146585e |
475 | |
476 | =item * builder |
477 | |
2e575bcd |
478 | Takes a method name which will be called to create the attribute - functions |
479 | exactly like default except that instead of calling |
480 | |
481 | $default->($self); |
482 | |
483 | Moo will call |
484 | |
485 | $self->$builder; |
8146585e |
486 | |
71db76ce |
487 | If you set this to just C<1>, the predicate is automatically named |
488 | C<_build_${attr_name}>. This feature comes from L<MooseX::AttributeShortcuts>. |
489 | |
8146585e |
490 | =item * clearer |
491 | |
492 | Takes a method name which will clear the attribute. |
493 | |
71db76ce |
494 | If you set this to just C<1>, the clearer is automatically named |
495 | C<clear_${attr_name}> if your attribute's name does not start with an |
496 | underscore, or <_clear_${attr_name_without_the_underscore}> if it does. |
497 | This feature comes from L<MooseX::AttributeShortcuts>. |
498 | |
8146585e |
499 | =item * lazy |
500 | |
501 | B<Boolean>. Set this if you want values for the attribute to be grabbed |
502 | lazily. This is usually a good idea if you have a L</builder> which requires |
503 | another attribute to be set. |
504 | |
505 | =item * required |
506 | |
507 | B<Boolean>. Set this if the attribute must be passed on instantiation. |
508 | |
1eba910c |
509 | =item * reader |
510 | |
511 | The value of this attribute will be the name of the method to get the value of |
512 | the attribute. If you like Java style methods, you might set this to |
513 | C<get_foo> |
514 | |
515 | =item * writer |
516 | |
517 | The value of this attribute will be the name of the method to set the value of |
518 | the attribute. If you like Java style methods, you might set this to |
519 | C<set_foo> |
520 | |
8146585e |
521 | =item * weak_ref |
522 | |
523 | B<Boolean>. Set this if you want the reference that the attribute contains to |
524 | be weakened; use this when circular references are possible, which will cause |
525 | leaks. |
526 | |
527 | =item * init_arg |
528 | |
529 | Takes the name of the key to look for at instantiation time of the object. A |
530 | common use of this is to make an underscored attribute have a non-underscored |
531 | initialization name. C<undef> means that passing the value in on instantiation |
71db76ce |
532 | is ignored. |
8146585e |
533 | |
534 | =back |
535 | |
536 | =head2 before |
537 | |
538 | before foo => sub { ... }; |
539 | |
540 | See L<< Class::Method::Modifiers/before method(s) => sub { ... } >> for full |
541 | documentation. |
542 | |
543 | =head2 around |
544 | |
545 | around foo => sub { ... }; |
546 | |
547 | See L<< Class::Method::Modifiers/around method(s) => sub { ... } >> for full |
548 | documentation. |
549 | |
550 | =head2 after |
551 | |
552 | after foo => sub { ... }; |
553 | |
554 | See L<< Class::Method::Modifiers/after method(s) => sub { ... } >> for full |
555 | documentation. |
556 | |
8146585e |
557 | =head1 SUB QUOTE AWARE |
558 | |
559 | L<Sub::Quote/quote_sub> allows us to create coderefs that are "inlineable," |
560 | giving us a handy, XS-free speed boost. Any option that is L<Sub::Quote> |
561 | aware can take advantage of this. |
562 | |
2e575bcd |
563 | =head1 INCOMPATIBILITIES WITH MOOSE |
8146585e |
564 | |
5902c1fc |
565 | There is no built in type system. C<isa> is verified with a coderef, if you |
8146585e |
566 | need complex types, just make a library of coderefs, or better yet, functions |
5902c1fc |
567 | that return quoted subs. L<MooX::Types::MooseLike> provides a similar API |
568 | to L<MooseX::Types::Moose> so that you can write |
569 | |
570 | has days_to_live => (is => 'ro', isa => Int); |
571 | |
572 | and have it work with both; it is hoped that providing only subrefs as an |
573 | API will encourage the use of other type systems as well, since it's |
574 | probably the weakest part of Moose design-wise. |
8146585e |
575 | |
2e575bcd |
576 | C<initializer> is not supported in core since the author considers it to be a |
f88623a1 |
577 | bad idea but may be supported by an extension in future. Meanwhile C<trigger> or |
578 | C<coerce> are more likely to be able to fulfill your needs. |
8146585e |
579 | |
580 | There is no meta object. If you need this level of complexity you wanted |
2e575bcd |
581 | L<Moose> - Moo succeeds at being small because it explicitly does not |
f9755246 |
582 | provide a metaprotocol. However, if you load L<Moose>, then |
583 | |
584 | Class::MOP::class_of($moo_class_or_role) |
585 | |
586 | will return an appropriate metaclass pre-populated by L<Moo>. |
8146585e |
587 | |
2e575bcd |
588 | No support for C<super>, C<override>, C<inner>, or C<augment> - override can |
589 | be handled by around albeit with a little more typing, and the author considers |
590 | augment to be a bad idea. |
8146585e |
591 | |
f2eac33e |
592 | The C<dump> method is not provided by default. The author suggests loading |
c96a6326 |
593 | L<Devel::Dwarn> into C<main::> (via C<perl -MDevel::Dwarn ...> for example) and |
594 | using C<$obj-E<gt>$::Dwarn()> instead. |
595 | |
8146585e |
596 | L</default> only supports coderefs, because doing otherwise is usually a |
597 | mistake anyway. |
598 | |
f9755246 |
599 | C<lazy_build> is not supported; you are instead encouraged to use the |
600 | C<is => 'lazy'> option supported by L<Moo> and L<MooseX::AttributeShortcuts>. |
8146585e |
601 | |
2e575bcd |
602 | C<auto_deref> is not supported since the author considers it a bad idea. |
8146585e |
603 | |
f9755246 |
604 | C<documentation> will show up in a L<Moose> metaclass created from your class |
c4074652 |
605 | but is otherwise ignored. Then again, L<Moose> ignores it as well, so this |
f9755246 |
606 | is arguably not an incompatibility. |
40f3e3aa |
607 | |
c4074652 |
608 | Since C<coerce> does not require C<isa> to be defined but L<Moose> does |
609 | require it, the metaclass inflation for coerce-alone is a trifle insane |
610 | and if you attempt to subtype the result will almost certainly break. |
611 | |
69673ca7 |
612 | Handling of warnings: when you C<use Moo> we enable FATAL warnings. The nearest |
613 | similar invocation for L<Moose> would be: |
614 | |
615 | use Moose; |
616 | use warnings FATAL => "all"; |
617 | |
618 | Additionally, L<Moo> supports a set of attribute option shortcuts intended to |
619 | reduce common boilerplate. The set of shortcuts is the same as in the L<Moose> |
239d4711 |
620 | module L<MooseX::AttributeShortcuts> as of its version 0.009+. So if you: |
69673ca7 |
621 | |
622 | package MyClass; |
623 | use Moo; |
624 | |
625 | The nearest L<Moose> invocation would be: |
626 | |
627 | package MyClass; |
628 | |
629 | use Moose; |
630 | use warnings FATAL => "all"; |
631 | use MooseX::AttributeShortcuts; |
632 | |
5902c1fc |
633 | or, if you're inheriting from a non-Moose class, |
634 | |
635 | package MyClass; |
636 | |
637 | use Moose; |
638 | use MooseX::NonMoose; |
639 | use warnings FATAL => "all"; |
640 | use MooseX::AttributeShortcuts; |
641 | |
642 | Finally, Moose requires you to call |
643 | |
644 | __PACKAGE__->meta->make_immutable; |
645 | |
646 | at the end of your class to get an inlined (i.e. not horribly slow) |
647 | constructor. Moo does it automatically the first time ->new is called |
648 | on your class. |
649 | |
660f3db2 |
650 | =head1 SUPPORT |
651 | |
652 | IRC: #web-simple on irc.perl.org |
653 | |
40f3e3aa |
654 | =head1 AUTHOR |
655 | |
656 | mst - Matt S. Trout (cpan:MSTROUT) <mst@shadowcat.co.uk> |
657 | |
658 | =head1 CONTRIBUTORS |
659 | |
5da684a2 |
660 | dg - David Leadbeater (cpan:DGL) <dgl@dgl.cx> |
661 | |
662 | frew - Arthur Axel "fREW" Schmidt (cpan:FREW) <frioux@gmail.com> |
663 | |
664 | hobbs - Andrew Rodland (cpan:ARODLAND) <arodland@cpan.org> |
665 | |
666 | jnap - John Napiorkowski (cpan:JJNAPIORK) <jjn1056@yahoo.com> |
667 | |
668 | ribasushi - Peter Rabbitson (cpan:RIBASUSHI) <ribasushi@cpan.org> |
40f3e3aa |
669 | |
11f7a042 |
670 | chip - Chip Salzenberg (cpan:CHIPS) <chip@pobox.com> |
671 | |
a17be455 |
672 | ajgb - Alex J. G. Burzyński (cpan:AJGB) <ajgb@cpan.org> |
673 | |
7b8177f8 |
674 | doy - Jesse Luehrs (cpan:DOY) <doy at tozt dot net> |
675 | |
1fb2de92 |
676 | perigrin - Chris Prather (cpan:PERIGRIN) <chris@prather.org> |
677 | |
40f3e3aa |
678 | =head1 COPYRIGHT |
679 | |
a958e36d |
680 | Copyright (c) 2010-2011 the Moo L</AUTHOR> and L</CONTRIBUTORS> |
40f3e3aa |
681 | as listed above. |
682 | |
683 | =head1 LICENSE |
684 | |
685 | This library is free software and may be distributed under the same terms |
686 | as perl itself. |
687 | |
688 | =cut |