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 | |
33c6cfea |
8 | our $VERSION = '0.091009'; # 0.91.9 |
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); |
3d49ee27 |
33 | return; |
6c74d087 |
34 | }; |
167455a0 |
35 | _install_coderef "${target}::with" => "Moo::with" => sub { |
faa9ce11 |
36 | require Moo::Role; |
6067158c |
37 | Moo::Role->apply_roles_to_package($target, @_); |
6c49212f |
38 | $class->_maybe_reset_handlemoose($target); |
6c74d087 |
39 | }; |
a16d301e |
40 | $MAKERS{$target} = {}; |
167455a0 |
41 | _install_coderef "${target}::has" => "Moo::has" => sub { |
14f32032 |
42 | my ($name, %spec) = @_; |
a16d301e |
43 | $class->_constructor_maker_for($target) |
44 | ->register_attribute_specs($name, \%spec); |
02e9ef74 |
45 | $class->_accessor_maker_for($target) |
46 | ->generate_method($target, $name, \%spec); |
6c49212f |
47 | $class->_maybe_reset_handlemoose($target); |
3d49ee27 |
48 | return; |
14f32032 |
49 | }; |
6c74d087 |
50 | foreach my $type (qw(before after around)) { |
167455a0 |
51 | _install_coderef "${target}::${type}" => "Moo::${type}" => sub { |
faa9ce11 |
52 | require Class::Method::Modifiers; |
6c74d087 |
53 | _install_modifier($target, $type, @_); |
3d49ee27 |
54 | return; |
6c74d087 |
55 | }; |
56 | } |
57 | { |
58 | no strict 'refs'; |
59 | @{"${target}::ISA"} = do { |
faa9ce11 |
60 | require Moo::Object; ('Moo::Object'); |
6c74d087 |
61 | } unless @{"${target}::ISA"}; |
62 | } |
3362e41c |
63 | if ($INC{'Moo/HandleMoose.pm'}) { |
64 | Moo::HandleMoose::inject_fake_metaclass_for($target); |
65 | } |
6c74d087 |
66 | } |
67 | |
6c49212f |
68 | sub _maybe_reset_handlemoose { |
69 | my ($class, $target) = @_; |
70 | if ($INC{"Moo/HandleMoose.pm"}) { |
71 | Moo::HandleMoose::maybe_reinject_fake_metaclass_for($target); |
72 | } |
73 | } |
74 | |
02e9ef74 |
75 | sub _accessor_maker_for { |
76 | my ($class, $target) = @_; |
77 | return unless $MAKERS{$target}; |
78 | $MAKERS{$target}{accessor} ||= do { |
79 | my $maker_class = do { |
80 | if (my $m = do { |
81 | if (my $defer_target = |
82 | (Sub::Defer::defer_info($target->can('new'))||[])->[0] |
83 | ) { |
84 | my ($pkg) = ($defer_target =~ /^(.*)::[^:]+$/); |
85 | $MAKERS{$pkg} && $MAKERS{$pkg}{accessor}; |
86 | } else { |
87 | undef; |
88 | } |
89 | }) { |
90 | ref($m); |
91 | } else { |
92 | require Method::Generate::Accessor; |
93 | 'Method::Generate::Accessor' |
94 | } |
95 | }; |
96 | $maker_class->new; |
97 | } |
98 | } |
99 | |
a16d301e |
100 | sub _constructor_maker_for { |
c4570291 |
101 | my ($class, $target, $select_super) = @_; |
a16d301e |
102 | return unless $MAKERS{$target}; |
103 | $MAKERS{$target}{constructor} ||= do { |
faa9ce11 |
104 | require Method::Generate::Constructor; |
105 | require Sub::Defer; |
c4570291 |
106 | my ($moo_constructor, $con); |
de5c0e53 |
107 | |
c4570291 |
108 | if ($select_super && $MAKERS{$select_super}) { |
109 | $moo_constructor = 1; |
110 | $con = $MAKERS{$select_super}{constructor}; |
111 | } else { |
de5c0e53 |
112 | my $t_new = $target->can('new'); |
c4570291 |
113 | if ($t_new) { |
114 | if ($t_new == Moo::Object->can('new')) { |
115 | $moo_constructor = 1; |
116 | } elsif (my $defer_target = (Sub::Defer::defer_info($t_new)||[])->[0]) { |
117 | my ($pkg) = ($defer_target =~ /^(.*)::[^:]+$/); |
118 | if ($MAKERS{$pkg}) { |
119 | $moo_constructor = 1; |
120 | $con = $MAKERS{$pkg}{constructor}; |
121 | } |
122 | } |
123 | } else { |
124 | $moo_constructor = 1; # no other constructor, make a Moo one |
125 | } |
de5c0e53 |
126 | }; |
02e9ef74 |
127 | ($con ? ref($con) : 'Method::Generate::Constructor') |
a16d301e |
128 | ->new( |
129 | package => $target, |
02e9ef74 |
130 | accessor_generator => $class->_accessor_maker_for($target), |
53875e2c |
131 | construction_string => ( |
132 | $moo_constructor |
133 | ? ($con ? $con->construction_string : undef) |
134 | : ('$class->'.$target.'::SUPER::new(@_)') |
e0e12d16 |
135 | ), |
76ab3977 |
136 | subconstructor_handler => ( |
137 | ' if ($Moo::MAKERS{$class}) {'."\n" |
138 | .' '.$class.'->_constructor_maker_for($class,'.perlstring($target).');'."\n" |
139 | .' return $class->new(@_)'.";\n" |
346177ba |
140 | .' } elsif ($INC{"Moose.pm"} and my $meta = Class::MOP::get_metaclass_by_name($class)) {'."\n" |
141 | .' return $meta->new_object(@_);'."\n" |
76ab3977 |
142 | .' }'."\n" |
e0e12d16 |
143 | ), |
a16d301e |
144 | ) |
145 | ->install_delayed |
de5c0e53 |
146 | ->register_attribute_specs(%{$con?$con->all_attribute_specs:{}}) |
a16d301e |
147 | } |
148 | } |
149 | |
6c74d087 |
150 | 1; |
a17be455 |
151 | =pod |
152 | |
153 | =encoding utf-8 |
8146585e |
154 | |
505f8b7a |
155 | =head1 NAME |
156 | |
157 | Moo - Minimalist Object Orientation (with Moose compatiblity) |
158 | |
8146585e |
159 | =head1 SYNOPSIS |
160 | |
161 | package Cat::Food; |
162 | |
163 | use Moo; |
164 | use Sub::Quote; |
165 | |
166 | sub feed_lion { |
167 | my $self = shift; |
168 | my $amount = shift || 1; |
169 | |
170 | $self->pounds( $self->pounds - $amount ); |
171 | } |
172 | |
173 | has taste => ( |
174 | is => 'ro', |
175 | ); |
176 | |
177 | has brand => ( |
178 | is => 'ro', |
179 | isa => sub { |
180 | die "Only SWEET-TREATZ supported!" unless $_[0] eq 'SWEET-TREATZ' |
181 | }, |
182 | ); |
183 | |
184 | has pounds => ( |
185 | is => 'rw', |
186 | isa => quote_sub q{ die "$_[0] is too much cat food!" unless $_[0] < 15 }, |
187 | ); |
188 | |
189 | 1; |
190 | |
191 | and else where |
192 | |
193 | my $full = Cat::Food->new( |
194 | taste => 'DELICIOUS.', |
195 | brand => 'SWEET-TREATZ', |
196 | pounds => 10, |
197 | ); |
198 | |
199 | $full->feed_lion; |
200 | |
201 | say $full->pounds; |
202 | |
203 | =head1 DESCRIPTION |
204 | |
205 | This module is an extremely light-weight, high-performance L<Moose> replacement. |
206 | It also avoids depending on any XS modules to allow simple deployments. The |
207 | name C<Moo> is based on the idea that it provides almost -but not quite- two |
208 | thirds of L<Moose>. |
209 | |
210 | Unlike C<Mouse> this module does not aim at full L<Moose> compatibility. See |
211 | L</INCOMPATIBILITIES> for more details. |
212 | |
5d5bb71d |
213 | =head1 WHY MOO EXISTS |
214 | |
215 | If you want a full object system with a rich Metaprotocol, L<Moose> is |
216 | already wonderful. |
217 | |
218 | I've tried several times to use L<Mouse> but it's 3x the size of Moo and |
219 | takes longer to load than most of my Moo based CGI scripts take to run. |
220 | |
221 | If you don't want L<Moose>, you don't want "less metaprotocol" like L<Mouse>, |
222 | you want "as little as possible" - which means "no metaprotocol", which is |
223 | what Moo provides. |
224 | |
225 | By Moo 1.0 I intend to have Moo's equivalent of L<Any::Moose> built in - |
226 | if Moose gets loaded, any Moo class or role will act as a Moose equivalent |
227 | if treated as such. |
228 | |
229 | Hence - Moo exists as its name - Minimal Object Orientation - with a pledge |
230 | to make it smooth to upgrade to L<Moose> when you need more than minimal |
231 | features. |
232 | |
1fce5bc9 |
233 | =head1 Moo and Moose - NEW, EXPERIMENTAL |
234 | |
235 | If L<Moo> detects L<Moose> being loaded, it will automatically register |
236 | metaclasses for your L<Moo> and L<Moo::Role> packages, so you should be able |
237 | to use them in L<Moose> code without it ever realising you aren't using |
238 | L<Moose> everywhere. |
239 | |
240 | Extending a L<Moose> class or consuming a L<Moose::Role> should also work. |
241 | |
c100c04c |
242 | So should extending a L<Mouse> class or consuming a L<Mouse::Role>. |
243 | |
660f3db2 |
244 | This means that there is no need for anything like L<Any::Moose> for Moo |
c100c04c |
245 | code - Moo and Moose code should simply interoperate without problem. To |
246 | handle L<Mouse> code, you'll likely need an empty Moo role or class consuming |
247 | or extending the L<Mouse> stuff since it doesn't register true L<Moose> |
248 | metaclasses like we do. |
660f3db2 |
249 | |
250 | However, these features are new as of 0.91.0 (0.091000) so while serviceable, |
251 | they are absolutely certain to not be 100% yet; please do report bugs. |
1fce5bc9 |
252 | |
253 | If you need to disable the metaclass creation, add: |
254 | |
255 | no Moo::sification; |
256 | |
257 | to your code before Moose is loaded, but bear in mind that this switch is |
258 | currently global and turns the mechanism off entirely, so don't put this |
259 | in library code, only in a top level script as a temporary measure while |
260 | you send a bug report. |
261 | |
8146585e |
262 | =head1 IMPORTED METHODS |
263 | |
264 | =head2 new |
265 | |
266 | Foo::Bar->new( attr1 => 3 ); |
267 | |
268 | or |
269 | |
270 | Foo::Bar->new({ attr1 => 3 }); |
271 | |
2e575bcd |
272 | =head2 BUILDARGS |
273 | |
f2eac33e |
274 | sub BUILDARGS { |
a17be455 |
275 | my ( $class, @args ) = @_; |
276 | |
277 | unshift @args, "attr1" if @args % 2 == 1; |
278 | |
f2eac33e |
279 | return { @args }; |
a17be455 |
280 | }; |
281 | |
282 | Foo::Bar->new( 3 ); |
283 | |
284 | The default implementation of this method accepts a hash or hash reference of |
285 | named parameters. If it receives a single argument that isn't a hash reference |
286 | it throws an error. |
287 | |
288 | You can override this method in your class to handle other types of options |
289 | passed to the constructor. |
290 | |
291 | This method should always return a hash reference of named options. |
2e575bcd |
292 | |
2d00f3d6 |
293 | =head2 BUILD |
8146585e |
294 | |
2d00f3d6 |
295 | Define a C<BUILD> method on your class and the constructor will automatically |
296 | call the C<BUILD> method from parent down to child after the object has |
297 | been instantiated. Typically this is used for object validation or possibly |
298 | logging. |
8146585e |
299 | |
2d00f3d6 |
300 | =head2 DEMOLISH |
c2cc003f |
301 | |
debb3fcd |
302 | If you have a C<DEMOLISH> method anywhere in your inheritance hierarchy, |
303 | a C<DESTROY> method is created on first object construction which will call |
c2cc003f |
304 | C<< $instance->DEMOLISH($in_global_destruction) >> for each C<DEMOLISH> |
debb3fcd |
305 | method from child upwards to parents. |
306 | |
307 | Note that the C<DESTROY> method is created on first construction of an object |
308 | of your class in order to not add overhead to classes without C<DEMOLISH> |
309 | methods; this may prove slightly surprising if you try and define your own. |
c2cc003f |
310 | |
8146585e |
311 | =head2 does |
312 | |
313 | if ($foo->does('Some::Role1')) { |
314 | ... |
315 | } |
316 | |
317 | Returns true if the object composes in the passed role. |
318 | |
319 | =head1 IMPORTED SUBROUTINES |
320 | |
321 | =head2 extends |
322 | |
323 | extends 'Parent::Class'; |
324 | |
2e575bcd |
325 | Declares base class. Multiple superclasses can be passed for multiple |
326 | inheritance (but please use roles instead). |
327 | |
328 | Calling extends more than once will REPLACE your superclasses, not add to |
329 | them like 'use base' would. |
8146585e |
330 | |
331 | =head2 with |
332 | |
333 | with 'Some::Role1'; |
8146585e |
334 | |
f9755246 |
335 | or |
336 | |
337 | with 'Some::Role1', 'Some::Role2'; |
338 | |
339 | Composes one or more L<Moo::Role> (or L<Role::Tiny>) roles into the current |
340 | class. An error will be raised if these roles have conflicting methods. |
8146585e |
341 | |
342 | =head2 has |
343 | |
344 | has attr => ( |
345 | is => 'ro', |
346 | ); |
347 | |
348 | Declares an attribute for the class. |
349 | |
350 | The options for C<has> are as follows: |
351 | |
352 | =over 2 |
353 | |
354 | =item * is |
355 | |
6577509a |
356 | B<required>, may be C<ro>, C<lazy>, C<rwp> or C<rw>. |
71db76ce |
357 | |
358 | C<ro> generates an accessor that dies if you attempt to write to it - i.e. |
359 | a getter only - by defaulting C<reader> to the name of the attribute. |
360 | |
71db76ce |
361 | C<lazy> generates a reader like C<ro>, but also sets C<lazy> to 1 and |
362 | C<builder> to C<_build_${attribute_name}> to allow on-demand generated |
363 | attributes. This feature was my attempt to fix my incompetence when |
364 | originally designing C<lazy_build>, and is also implemented by |
365 | L<MooseX::AttributeShortcuts>. |
366 | |
367 | C<rwp> generates a reader like C<ro>, but also sets C<writer> to |
368 | C<_set_${attribute_name}> for attributes that are designed to be written |
369 | from inside of the class, but read-only from outside. |
370 | This feature comes from L<MooseX::AttributeShortcuts>. |
8146585e |
371 | |
6577509a |
372 | C<rw> generates a normal getter/setter by defaulting C<accessor> to the |
373 | name of the attribute. |
374 | |
8146585e |
375 | =item * isa |
376 | |
377 | Takes a coderef which is meant to validate the attribute. Unlike L<Moose> Moo |
378 | does not include a basic type system, so instead of doing C<< isa => 'Num' >>, |
379 | one should do |
380 | |
381 | isa => quote_sub q{ |
382 | die "$_[0] is not a number!" unless looks_like_number $_[0] |
383 | }, |
384 | |
385 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
386 | |
c4074652 |
387 | Since L<Moo> does B<not> run the C<isa> check before C<coerce> if a coercion |
388 | subroutine has been supplied, C<isa> checks are not structural to your code |
389 | and can, if desired, be omitted on non-debug builds (although if this results |
390 | in an uncaught bug causing your program to break, the L<Moo> authors guarantee |
391 | nothing except that you get to keep both halves). |
392 | |
71db76ce |
393 | If you want L<MooseX::Types> style named types, look at |
394 | L<MooX::Types::MooseLike>. |
395 | |
396 | To cause your C<isa> entries to be automatically mapped to named |
397 | L<Moose::Meta::TypeConstraint> objects (rather than the default behaviour |
398 | of creating an anonymous type), set: |
399 | |
400 | $Moo::HandleMoose::TYPE_MAP{$isa_coderef} = sub { |
401 | require MooseX::Types::Something; |
402 | return MooseX::Types::Something::TypeName(); |
403 | }; |
404 | |
405 | Note that this example is purely illustrative; anything that returns a |
406 | L<Moose::Meta::TypeConstraint> object or something similar enough to it to |
407 | make L<Moose> happy is fine. |
408 | |
8146585e |
409 | =item * coerce |
410 | |
411 | Takes a coderef which is meant to coerce the attribute. The basic idea is to |
412 | do something like the following: |
413 | |
414 | coerce => quote_sub q{ |
415 | $_[0] + 1 unless $_[0] % 2 |
416 | }, |
417 | |
c4074652 |
418 | Note that L<Moo> will always fire your coercion - this is to permit |
419 | isa entries to be used purely for bug trapping, whereas coercions are |
420 | always structural to your code. We do, however, apply any supplied C<isa> |
421 | check after the coercion has run to ensure that it returned a valid value. |
8146585e |
422 | |
23a3e34e |
423 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
2e575bcd |
424 | |
e1efec09 |
425 | =item * handles |
426 | |
427 | Takes a string |
428 | |
69673ca7 |
429 | handles => 'RobotRole' |
430 | |
431 | Where C<RobotRole> is a role (L<Moo::Role>) that defines an interface which |
432 | becomes the list of methods to handle. |
e1efec09 |
433 | |
434 | Takes a list of methods |
435 | |
436 | handles => [ qw( one two ) ] |
437 | |
438 | Takes a hashref |
439 | |
440 | handles => { |
441 | un => 'one', |
442 | } |
443 | |
8146585e |
444 | =item * trigger |
445 | |
6fe5100d |
446 | Takes a coderef which will get called any time the attribute is set. This |
447 | includes the constructor. Coderef will be invoked against the object with the |
448 | new value as an argument. |
8146585e |
449 | |
71db76ce |
450 | If you set this to just C<1>, it generates a trigger which calls the |
451 | C<_trigger_${attr_name}> method on C<$self>. This feature comes from |
452 | L<MooseX::AttributeShortcuts>. |
453 | |
2e575bcd |
454 | Note that Moose also passes the old value, if any; this feature is not yet |
455 | supported. |
456 | |
8146585e |
457 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
458 | |
459 | =item * default |
460 | |
2e575bcd |
461 | Takes a coderef which will get called with $self as its only argument |
462 | to populate an attribute if no value is supplied to the constructor - or |
463 | if the attribute is lazy, when the attribute is first retrieved if no |
464 | value has yet been provided. |
465 | |
466 | Note that if your default is fired during new() there is no guarantee that |
467 | other attributes have been populated yet so you should not rely on their |
468 | existence. |
8146585e |
469 | |
470 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
471 | |
472 | =item * predicate |
473 | |
2e575bcd |
474 | Takes a method name which will return true if an attribute has a value. |
8146585e |
475 | |
71db76ce |
476 | If you set this to just C<1>, the predicate is automatically named |
477 | C<has_${attr_name}> if your attribute's name does not start with an |
478 | underscore, or <_has_${attr_name_without_the_underscore}> if it does. |
479 | This feature comes from L<MooseX::AttributeShortcuts>. |
8146585e |
480 | |
481 | =item * builder |
482 | |
2e575bcd |
483 | Takes a method name which will be called to create the attribute - functions |
484 | exactly like default except that instead of calling |
485 | |
486 | $default->($self); |
487 | |
488 | Moo will call |
489 | |
490 | $self->$builder; |
8146585e |
491 | |
71db76ce |
492 | If you set this to just C<1>, the predicate is automatically named |
493 | C<_build_${attr_name}>. This feature comes from L<MooseX::AttributeShortcuts>. |
494 | |
8146585e |
495 | =item * clearer |
496 | |
497 | Takes a method name which will clear the attribute. |
498 | |
71db76ce |
499 | If you set this to just C<1>, the clearer is automatically named |
500 | C<clear_${attr_name}> if your attribute's name does not start with an |
501 | underscore, or <_clear_${attr_name_without_the_underscore}> if it does. |
502 | This feature comes from L<MooseX::AttributeShortcuts>. |
503 | |
8146585e |
504 | =item * lazy |
505 | |
506 | B<Boolean>. Set this if you want values for the attribute to be grabbed |
507 | lazily. This is usually a good idea if you have a L</builder> which requires |
508 | another attribute to be set. |
509 | |
510 | =item * required |
511 | |
512 | B<Boolean>. Set this if the attribute must be passed on instantiation. |
513 | |
1eba910c |
514 | =item * reader |
515 | |
516 | The value of this attribute will be the name of the method to get the value of |
517 | the attribute. If you like Java style methods, you might set this to |
518 | C<get_foo> |
519 | |
520 | =item * writer |
521 | |
522 | The value of this attribute will be the name of the method to set the value of |
523 | the attribute. If you like Java style methods, you might set this to |
524 | C<set_foo> |
525 | |
8146585e |
526 | =item * weak_ref |
527 | |
528 | B<Boolean>. Set this if you want the reference that the attribute contains to |
529 | be weakened; use this when circular references are possible, which will cause |
530 | leaks. |
531 | |
532 | =item * init_arg |
533 | |
534 | Takes the name of the key to look for at instantiation time of the object. A |
535 | common use of this is to make an underscored attribute have a non-underscored |
536 | initialization name. C<undef> means that passing the value in on instantiation |
71db76ce |
537 | is ignored. |
8146585e |
538 | |
539 | =back |
540 | |
541 | =head2 before |
542 | |
543 | before foo => sub { ... }; |
544 | |
545 | See L<< Class::Method::Modifiers/before method(s) => sub { ... } >> for full |
546 | documentation. |
547 | |
548 | =head2 around |
549 | |
550 | around foo => sub { ... }; |
551 | |
552 | See L<< Class::Method::Modifiers/around method(s) => sub { ... } >> for full |
553 | documentation. |
554 | |
555 | =head2 after |
556 | |
557 | after foo => sub { ... }; |
558 | |
559 | See L<< Class::Method::Modifiers/after method(s) => sub { ... } >> for full |
560 | documentation. |
561 | |
8146585e |
562 | =head1 SUB QUOTE AWARE |
563 | |
564 | L<Sub::Quote/quote_sub> allows us to create coderefs that are "inlineable," |
565 | giving us a handy, XS-free speed boost. Any option that is L<Sub::Quote> |
566 | aware can take advantage of this. |
567 | |
2e575bcd |
568 | =head1 INCOMPATIBILITIES WITH MOOSE |
8146585e |
569 | |
5902c1fc |
570 | There is no built in type system. C<isa> is verified with a coderef, if you |
8146585e |
571 | need complex types, just make a library of coderefs, or better yet, functions |
5902c1fc |
572 | that return quoted subs. L<MooX::Types::MooseLike> provides a similar API |
573 | to L<MooseX::Types::Moose> so that you can write |
574 | |
575 | has days_to_live => (is => 'ro', isa => Int); |
576 | |
577 | and have it work with both; it is hoped that providing only subrefs as an |
578 | API will encourage the use of other type systems as well, since it's |
579 | probably the weakest part of Moose design-wise. |
8146585e |
580 | |
2e575bcd |
581 | C<initializer> is not supported in core since the author considers it to be a |
f88623a1 |
582 | bad idea but may be supported by an extension in future. Meanwhile C<trigger> or |
583 | C<coerce> are more likely to be able to fulfill your needs. |
8146585e |
584 | |
585 | There is no meta object. If you need this level of complexity you wanted |
2e575bcd |
586 | L<Moose> - Moo succeeds at being small because it explicitly does not |
f9755246 |
587 | provide a metaprotocol. However, if you load L<Moose>, then |
588 | |
589 | Class::MOP::class_of($moo_class_or_role) |
590 | |
591 | will return an appropriate metaclass pre-populated by L<Moo>. |
8146585e |
592 | |
13e41b70 |
593 | No support for C<super>, C<override>, C<inner>, or C<augment> - the author |
594 | considers augment to be a bad idea, and override can be translated: |
595 | |
596 | override foo => sub { |
597 | ... |
598 | super(); |
599 | ... |
600 | }; |
601 | |
602 | around foo => sub { |
603 | my ($orig, $self) = (shift, shift); |
604 | ... |
605 | $self->$orig(@_); |
606 | ... |
607 | }; |
8146585e |
608 | |
f2eac33e |
609 | The C<dump> method is not provided by default. The author suggests loading |
c96a6326 |
610 | L<Devel::Dwarn> into C<main::> (via C<perl -MDevel::Dwarn ...> for example) and |
611 | using C<$obj-E<gt>$::Dwarn()> instead. |
612 | |
8146585e |
613 | L</default> only supports coderefs, because doing otherwise is usually a |
614 | mistake anyway. |
615 | |
f9755246 |
616 | C<lazy_build> is not supported; you are instead encouraged to use the |
617 | C<is => 'lazy'> option supported by L<Moo> and L<MooseX::AttributeShortcuts>. |
8146585e |
618 | |
2e575bcd |
619 | C<auto_deref> is not supported since the author considers it a bad idea. |
8146585e |
620 | |
f9755246 |
621 | C<documentation> will show up in a L<Moose> metaclass created from your class |
c4074652 |
622 | but is otherwise ignored. Then again, L<Moose> ignores it as well, so this |
f9755246 |
623 | is arguably not an incompatibility. |
40f3e3aa |
624 | |
c4074652 |
625 | Since C<coerce> does not require C<isa> to be defined but L<Moose> does |
626 | require it, the metaclass inflation for coerce-alone is a trifle insane |
627 | and if you attempt to subtype the result will almost certainly break. |
628 | |
69673ca7 |
629 | Handling of warnings: when you C<use Moo> we enable FATAL warnings. The nearest |
630 | similar invocation for L<Moose> would be: |
631 | |
632 | use Moose; |
633 | use warnings FATAL => "all"; |
634 | |
635 | Additionally, L<Moo> supports a set of attribute option shortcuts intended to |
636 | reduce common boilerplate. The set of shortcuts is the same as in the L<Moose> |
239d4711 |
637 | module L<MooseX::AttributeShortcuts> as of its version 0.009+. So if you: |
69673ca7 |
638 | |
639 | package MyClass; |
640 | use Moo; |
641 | |
642 | The nearest L<Moose> invocation would be: |
643 | |
644 | package MyClass; |
645 | |
646 | use Moose; |
647 | use warnings FATAL => "all"; |
648 | use MooseX::AttributeShortcuts; |
649 | |
5902c1fc |
650 | or, if you're inheriting from a non-Moose class, |
651 | |
652 | package MyClass; |
653 | |
654 | use Moose; |
655 | use MooseX::NonMoose; |
656 | use warnings FATAL => "all"; |
657 | use MooseX::AttributeShortcuts; |
658 | |
659 | Finally, Moose requires you to call |
660 | |
661 | __PACKAGE__->meta->make_immutable; |
662 | |
663 | at the end of your class to get an inlined (i.e. not horribly slow) |
664 | constructor. Moo does it automatically the first time ->new is called |
665 | on your class. |
666 | |
660f3db2 |
667 | =head1 SUPPORT |
668 | |
669 | IRC: #web-simple on irc.perl.org |
670 | |
40f3e3aa |
671 | =head1 AUTHOR |
672 | |
673 | mst - Matt S. Trout (cpan:MSTROUT) <mst@shadowcat.co.uk> |
674 | |
675 | =head1 CONTRIBUTORS |
676 | |
5da684a2 |
677 | dg - David Leadbeater (cpan:DGL) <dgl@dgl.cx> |
678 | |
679 | frew - Arthur Axel "fREW" Schmidt (cpan:FREW) <frioux@gmail.com> |
680 | |
681 | hobbs - Andrew Rodland (cpan:ARODLAND) <arodland@cpan.org> |
682 | |
683 | jnap - John Napiorkowski (cpan:JJNAPIORK) <jjn1056@yahoo.com> |
684 | |
685 | ribasushi - Peter Rabbitson (cpan:RIBASUSHI) <ribasushi@cpan.org> |
40f3e3aa |
686 | |
11f7a042 |
687 | chip - Chip Salzenberg (cpan:CHIPS) <chip@pobox.com> |
688 | |
a17be455 |
689 | ajgb - Alex J. G. Burzyński (cpan:AJGB) <ajgb@cpan.org> |
690 | |
7b8177f8 |
691 | doy - Jesse Luehrs (cpan:DOY) <doy at tozt dot net> |
692 | |
1fb2de92 |
693 | perigrin - Chris Prather (cpan:PERIGRIN) <chris@prather.org> |
694 | |
40f3e3aa |
695 | =head1 COPYRIGHT |
696 | |
a958e36d |
697 | Copyright (c) 2010-2011 the Moo L</AUTHOR> and L</CONTRIBUTORS> |
40f3e3aa |
698 | as listed above. |
699 | |
700 | =head1 LICENSE |
701 | |
702 | This library is free software and may be distributed under the same terms |
703 | as perl itself. |
704 | |
705 | =cut |