Commit | Line | Data |
b1eebd55 |
1 | package Moo; |
6c74d087 |
2 | |
3 | use strictures 1; |
b1eebd55 |
4 | use Moo::_Utils; |
e0e12d16 |
5 | use B 'perlstring'; |
6c74d087 |
6 | |
35ddd7d1 |
7 | our $VERSION = '0.091001'; # 0.91.1 |
6d71fae7 |
8 | $VERSION = eval $VERSION; |
9 | |
c2cb1fed |
10 | require Moo::sification; |
8c46a8f6 |
11 | |
14f32032 |
12 | our %MAKERS; |
13 | |
6c74d087 |
14 | sub import { |
15 | my $target = caller; |
a16d301e |
16 | my $class = shift; |
de3d4906 |
17 | strictures->import; |
1ba11455 |
18 | return if $MAKERS{$target}; # already exported into this package |
575ba24c |
19 | _install_coderef "${target}::extends" => sub { |
fb5074f6 |
20 | _load_module($_) for @_; |
786e5ba0 |
21 | # Can't do *{...} = \@_ or 5.10.0's mro.pm stops seeing @ISA |
22 | @{*{_getglob("${target}::ISA")}{ARRAY}} = @_; |
3b0d7efd |
23 | if (my $old = delete $Moo::MAKERS{$target}{constructor}) { |
24 | delete _getstash($target)->{new}; |
25 | Moo->_constructor_maker_for($target) |
26 | ->register_attribute_specs(%{$old->all_attribute_specs}); |
27 | } |
6c74d087 |
28 | }; |
575ba24c |
29 | _install_coderef "${target}::with" => sub { |
faa9ce11 |
30 | require Moo::Role; |
6893ea30 |
31 | Moo::Role->apply_roles_to_package($target, $_[0]); |
6c74d087 |
32 | }; |
a16d301e |
33 | $MAKERS{$target} = {}; |
575ba24c |
34 | _install_coderef "${target}::has" => sub { |
14f32032 |
35 | my ($name, %spec) = @_; |
36 | ($MAKERS{$target}{accessor} ||= do { |
faa9ce11 |
37 | require Method::Generate::Accessor; |
14f32032 |
38 | Method::Generate::Accessor->new |
39 | })->generate_method($target, $name, \%spec); |
a16d301e |
40 | $class->_constructor_maker_for($target) |
41 | ->register_attribute_specs($name, \%spec); |
14f32032 |
42 | }; |
6c74d087 |
43 | foreach my $type (qw(before after around)) { |
575ba24c |
44 | _install_coderef "${target}::${type}" => sub { |
faa9ce11 |
45 | require Class::Method::Modifiers; |
6c74d087 |
46 | _install_modifier($target, $type, @_); |
47 | }; |
48 | } |
49 | { |
50 | no strict 'refs'; |
51 | @{"${target}::ISA"} = do { |
faa9ce11 |
52 | require Moo::Object; ('Moo::Object'); |
6c74d087 |
53 | } unless @{"${target}::ISA"}; |
54 | } |
3362e41c |
55 | if ($INC{'Moo/HandleMoose.pm'}) { |
56 | Moo::HandleMoose::inject_fake_metaclass_for($target); |
57 | } |
6c74d087 |
58 | } |
59 | |
a16d301e |
60 | sub _constructor_maker_for { |
c4570291 |
61 | my ($class, $target, $select_super) = @_; |
a16d301e |
62 | return unless $MAKERS{$target}; |
63 | $MAKERS{$target}{constructor} ||= do { |
faa9ce11 |
64 | require Method::Generate::Constructor; |
65 | require Sub::Defer; |
c4570291 |
66 | my ($moo_constructor, $con); |
de5c0e53 |
67 | |
c4570291 |
68 | if ($select_super && $MAKERS{$select_super}) { |
69 | $moo_constructor = 1; |
70 | $con = $MAKERS{$select_super}{constructor}; |
71 | } else { |
de5c0e53 |
72 | my $t_new = $target->can('new'); |
c4570291 |
73 | if ($t_new) { |
74 | if ($t_new == Moo::Object->can('new')) { |
75 | $moo_constructor = 1; |
76 | } elsif (my $defer_target = (Sub::Defer::defer_info($t_new)||[])->[0]) { |
77 | my ($pkg) = ($defer_target =~ /^(.*)::[^:]+$/); |
78 | if ($MAKERS{$pkg}) { |
79 | $moo_constructor = 1; |
80 | $con = $MAKERS{$pkg}{constructor}; |
81 | } |
82 | } |
83 | } else { |
84 | $moo_constructor = 1; # no other constructor, make a Moo one |
85 | } |
de5c0e53 |
86 | }; |
a16d301e |
87 | Method::Generate::Constructor |
88 | ->new( |
89 | package => $target, |
90 | accessor_generator => do { |
faa9ce11 |
91 | require Method::Generate::Accessor; |
a16d301e |
92 | Method::Generate::Accessor->new; |
de5c0e53 |
93 | }, |
53875e2c |
94 | construction_string => ( |
95 | $moo_constructor |
96 | ? ($con ? $con->construction_string : undef) |
97 | : ('$class->'.$target.'::SUPER::new(@_)') |
e0e12d16 |
98 | ), |
76ab3977 |
99 | subconstructor_handler => ( |
100 | ' if ($Moo::MAKERS{$class}) {'."\n" |
101 | .' '.$class.'->_constructor_maker_for($class,'.perlstring($target).');'."\n" |
102 | .' return $class->new(@_)'.";\n" |
103 | .' }'."\n" |
e0e12d16 |
104 | ), |
a16d301e |
105 | ) |
106 | ->install_delayed |
de5c0e53 |
107 | ->register_attribute_specs(%{$con?$con->all_attribute_specs:{}}) |
a16d301e |
108 | } |
109 | } |
110 | |
6c74d087 |
111 | 1; |
a17be455 |
112 | =pod |
113 | |
114 | =encoding utf-8 |
8146585e |
115 | |
505f8b7a |
116 | =head1 NAME |
117 | |
118 | Moo - Minimalist Object Orientation (with Moose compatiblity) |
119 | |
8146585e |
120 | =head1 SYNOPSIS |
121 | |
122 | package Cat::Food; |
123 | |
124 | use Moo; |
125 | use Sub::Quote; |
126 | |
127 | sub feed_lion { |
128 | my $self = shift; |
129 | my $amount = shift || 1; |
130 | |
131 | $self->pounds( $self->pounds - $amount ); |
132 | } |
133 | |
134 | has taste => ( |
135 | is => 'ro', |
136 | ); |
137 | |
138 | has brand => ( |
139 | is => 'ro', |
140 | isa => sub { |
141 | die "Only SWEET-TREATZ supported!" unless $_[0] eq 'SWEET-TREATZ' |
142 | }, |
143 | ); |
144 | |
145 | has pounds => ( |
146 | is => 'rw', |
147 | isa => quote_sub q{ die "$_[0] is too much cat food!" unless $_[0] < 15 }, |
148 | ); |
149 | |
150 | 1; |
151 | |
152 | and else where |
153 | |
154 | my $full = Cat::Food->new( |
155 | taste => 'DELICIOUS.', |
156 | brand => 'SWEET-TREATZ', |
157 | pounds => 10, |
158 | ); |
159 | |
160 | $full->feed_lion; |
161 | |
162 | say $full->pounds; |
163 | |
164 | =head1 DESCRIPTION |
165 | |
166 | This module is an extremely light-weight, high-performance L<Moose> replacement. |
167 | It also avoids depending on any XS modules to allow simple deployments. The |
168 | name C<Moo> is based on the idea that it provides almost -but not quite- two |
169 | thirds of L<Moose>. |
170 | |
171 | Unlike C<Mouse> this module does not aim at full L<Moose> compatibility. See |
172 | L</INCOMPATIBILITIES> for more details. |
173 | |
5d5bb71d |
174 | =head1 WHY MOO EXISTS |
175 | |
176 | If you want a full object system with a rich Metaprotocol, L<Moose> is |
177 | already wonderful. |
178 | |
179 | I've tried several times to use L<Mouse> but it's 3x the size of Moo and |
180 | takes longer to load than most of my Moo based CGI scripts take to run. |
181 | |
182 | If you don't want L<Moose>, you don't want "less metaprotocol" like L<Mouse>, |
183 | you want "as little as possible" - which means "no metaprotocol", which is |
184 | what Moo provides. |
185 | |
186 | By Moo 1.0 I intend to have Moo's equivalent of L<Any::Moose> built in - |
187 | if Moose gets loaded, any Moo class or role will act as a Moose equivalent |
188 | if treated as such. |
189 | |
190 | Hence - Moo exists as its name - Minimal Object Orientation - with a pledge |
191 | to make it smooth to upgrade to L<Moose> when you need more than minimal |
192 | features. |
193 | |
1fce5bc9 |
194 | =head1 Moo and Moose - NEW, EXPERIMENTAL |
195 | |
196 | If L<Moo> detects L<Moose> being loaded, it will automatically register |
197 | metaclasses for your L<Moo> and L<Moo::Role> packages, so you should be able |
198 | to use them in L<Moose> code without it ever realising you aren't using |
199 | L<Moose> everywhere. |
200 | |
201 | Extending a L<Moose> class or consuming a L<Moose::Role> should also work. |
202 | |
660f3db2 |
203 | This means that there is no need for anything like L<Any::Moose> for Moo |
204 | code - Moo and Moose code should simply interoperate without problem. |
205 | |
206 | However, these features are new as of 0.91.0 (0.091000) so while serviceable, |
207 | they are absolutely certain to not be 100% yet; please do report bugs. |
1fce5bc9 |
208 | |
209 | If you need to disable the metaclass creation, add: |
210 | |
211 | no Moo::sification; |
212 | |
213 | to your code before Moose is loaded, but bear in mind that this switch is |
214 | currently global and turns the mechanism off entirely, so don't put this |
215 | in library code, only in a top level script as a temporary measure while |
216 | you send a bug report. |
217 | |
8146585e |
218 | =head1 IMPORTED METHODS |
219 | |
220 | =head2 new |
221 | |
222 | Foo::Bar->new( attr1 => 3 ); |
223 | |
224 | or |
225 | |
226 | Foo::Bar->new({ attr1 => 3 }); |
227 | |
2e575bcd |
228 | =head2 BUILDARGS |
229 | |
f2eac33e |
230 | sub BUILDARGS { |
a17be455 |
231 | my ( $class, @args ) = @_; |
232 | |
233 | unshift @args, "attr1" if @args % 2 == 1; |
234 | |
f2eac33e |
235 | return { @args }; |
a17be455 |
236 | }; |
237 | |
238 | Foo::Bar->new( 3 ); |
239 | |
240 | The default implementation of this method accepts a hash or hash reference of |
241 | named parameters. If it receives a single argument that isn't a hash reference |
242 | it throws an error. |
243 | |
244 | You can override this method in your class to handle other types of options |
245 | passed to the constructor. |
246 | |
247 | This method should always return a hash reference of named options. |
2e575bcd |
248 | |
2d00f3d6 |
249 | =head2 BUILD |
8146585e |
250 | |
2d00f3d6 |
251 | Define a C<BUILD> method on your class and the constructor will automatically |
252 | call the C<BUILD> method from parent down to child after the object has |
253 | been instantiated. Typically this is used for object validation or possibly |
254 | logging. |
8146585e |
255 | |
2d00f3d6 |
256 | =head2 DEMOLISH |
c2cc003f |
257 | |
debb3fcd |
258 | If you have a C<DEMOLISH> method anywhere in your inheritance hierarchy, |
259 | a C<DESTROY> method is created on first object construction which will call |
c2cc003f |
260 | C<< $instance->DEMOLISH($in_global_destruction) >> for each C<DEMOLISH> |
debb3fcd |
261 | method from child upwards to parents. |
262 | |
263 | Note that the C<DESTROY> method is created on first construction of an object |
264 | of your class in order to not add overhead to classes without C<DEMOLISH> |
265 | methods; this may prove slightly surprising if you try and define your own. |
c2cc003f |
266 | |
8146585e |
267 | =head2 does |
268 | |
269 | if ($foo->does('Some::Role1')) { |
270 | ... |
271 | } |
272 | |
273 | Returns true if the object composes in the passed role. |
274 | |
275 | =head1 IMPORTED SUBROUTINES |
276 | |
277 | =head2 extends |
278 | |
279 | extends 'Parent::Class'; |
280 | |
2e575bcd |
281 | Declares base class. Multiple superclasses can be passed for multiple |
282 | inheritance (but please use roles instead). |
283 | |
284 | Calling extends more than once will REPLACE your superclasses, not add to |
285 | them like 'use base' would. |
8146585e |
286 | |
287 | =head2 with |
288 | |
289 | with 'Some::Role1'; |
290 | with 'Some::Role2'; |
291 | |
292 | Composes a L<Role::Tiny> into current class. Only one role may be composed in |
293 | at a time to allow the code to remain as simple as possible. |
294 | |
295 | =head2 has |
296 | |
297 | has attr => ( |
298 | is => 'ro', |
299 | ); |
300 | |
301 | Declares an attribute for the class. |
302 | |
303 | The options for C<has> are as follows: |
304 | |
305 | =over 2 |
306 | |
307 | =item * is |
308 | |
309 | B<required>, must be C<ro> or C<rw>. Unsurprisingly, C<ro> generates an |
0654a8fa |
310 | accessor that will not respond to arguments; to be clear: a getter only. C<rw> |
8146585e |
311 | will create a perlish getter/setter. |
312 | |
313 | =item * isa |
314 | |
315 | Takes a coderef which is meant to validate the attribute. Unlike L<Moose> Moo |
316 | does not include a basic type system, so instead of doing C<< isa => 'Num' >>, |
317 | one should do |
318 | |
319 | isa => quote_sub q{ |
320 | die "$_[0] is not a number!" unless looks_like_number $_[0] |
321 | }, |
322 | |
323 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
324 | |
325 | =item * coerce |
326 | |
327 | Takes a coderef which is meant to coerce the attribute. The basic idea is to |
328 | do something like the following: |
329 | |
330 | coerce => quote_sub q{ |
331 | $_[0] + 1 unless $_[0] % 2 |
332 | }, |
333 | |
23a3e34e |
334 | Coerce does not require C<isa> to be defined. |
8146585e |
335 | |
23a3e34e |
336 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
2e575bcd |
337 | |
e1efec09 |
338 | =item * handles |
339 | |
340 | Takes a string |
341 | |
69673ca7 |
342 | handles => 'RobotRole' |
343 | |
344 | Where C<RobotRole> is a role (L<Moo::Role>) that defines an interface which |
345 | becomes the list of methods to handle. |
e1efec09 |
346 | |
347 | Takes a list of methods |
348 | |
349 | handles => [ qw( one two ) ] |
350 | |
351 | Takes a hashref |
352 | |
353 | handles => { |
354 | un => 'one', |
355 | } |
356 | |
8146585e |
357 | =item * trigger |
358 | |
6fe5100d |
359 | Takes a coderef which will get called any time the attribute is set. This |
360 | includes the constructor. Coderef will be invoked against the object with the |
361 | new value as an argument. |
8146585e |
362 | |
2e575bcd |
363 | Note that Moose also passes the old value, if any; this feature is not yet |
364 | supported. |
365 | |
8146585e |
366 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
367 | |
368 | =item * default |
369 | |
2e575bcd |
370 | Takes a coderef which will get called with $self as its only argument |
371 | to populate an attribute if no value is supplied to the constructor - or |
372 | if the attribute is lazy, when the attribute is first retrieved if no |
373 | value has yet been provided. |
374 | |
375 | Note that if your default is fired during new() there is no guarantee that |
376 | other attributes have been populated yet so you should not rely on their |
377 | existence. |
8146585e |
378 | |
379 | L<Sub::Quote aware|/SUB QUOTE AWARE> |
380 | |
381 | =item * predicate |
382 | |
2e575bcd |
383 | Takes a method name which will return true if an attribute has a value. |
8146585e |
384 | |
385 | A common example of this would be to call it C<has_$foo>, implying that the |
386 | object has a C<$foo> set. |
387 | |
388 | =item * builder |
389 | |
2e575bcd |
390 | Takes a method name which will be called to create the attribute - functions |
391 | exactly like default except that instead of calling |
392 | |
393 | $default->($self); |
394 | |
395 | Moo will call |
396 | |
397 | $self->$builder; |
8146585e |
398 | |
399 | =item * clearer |
400 | |
401 | Takes a method name which will clear the attribute. |
402 | |
403 | =item * lazy |
404 | |
405 | B<Boolean>. Set this if you want values for the attribute to be grabbed |
406 | lazily. This is usually a good idea if you have a L</builder> which requires |
407 | another attribute to be set. |
408 | |
409 | =item * required |
410 | |
411 | B<Boolean>. Set this if the attribute must be passed on instantiation. |
412 | |
1eba910c |
413 | =item * reader |
414 | |
415 | The value of this attribute will be the name of the method to get the value of |
416 | the attribute. If you like Java style methods, you might set this to |
417 | C<get_foo> |
418 | |
419 | =item * writer |
420 | |
421 | The value of this attribute will be the name of the method to set the value of |
422 | the attribute. If you like Java style methods, you might set this to |
423 | C<set_foo> |
424 | |
8146585e |
425 | =item * weak_ref |
426 | |
427 | B<Boolean>. Set this if you want the reference that the attribute contains to |
428 | be weakened; use this when circular references are possible, which will cause |
429 | leaks. |
430 | |
431 | =item * init_arg |
432 | |
433 | Takes the name of the key to look for at instantiation time of the object. A |
434 | common use of this is to make an underscored attribute have a non-underscored |
435 | initialization name. C<undef> means that passing the value in on instantiation |
436 | |
437 | =back |
438 | |
439 | =head2 before |
440 | |
441 | before foo => sub { ... }; |
442 | |
443 | See L<< Class::Method::Modifiers/before method(s) => sub { ... } >> for full |
444 | documentation. |
445 | |
446 | =head2 around |
447 | |
448 | around foo => sub { ... }; |
449 | |
450 | See L<< Class::Method::Modifiers/around method(s) => sub { ... } >> for full |
451 | documentation. |
452 | |
453 | =head2 after |
454 | |
455 | after foo => sub { ... }; |
456 | |
457 | See L<< Class::Method::Modifiers/after method(s) => sub { ... } >> for full |
458 | documentation. |
459 | |
8146585e |
460 | =head1 SUB QUOTE AWARE |
461 | |
462 | L<Sub::Quote/quote_sub> allows us to create coderefs that are "inlineable," |
463 | giving us a handy, XS-free speed boost. Any option that is L<Sub::Quote> |
464 | aware can take advantage of this. |
465 | |
2e575bcd |
466 | =head1 INCOMPATIBILITIES WITH MOOSE |
8146585e |
467 | |
468 | You can only compose one role at a time. If your application is large or |
5902c1fc |
469 | complex enough to warrant complex composition, you wanted L<Moose>. Note that |
470 | this does not mean you can only compose one role per class - |
8146585e |
471 | |
5902c1fc |
472 | with 'FirstRole'; |
473 | with 'SecondRole'; |
474 | |
475 | is absolutely fine, there's just currently no equivalent of Moose's |
476 | |
477 | with 'FirstRole', 'SecondRole'; |
478 | |
479 | which composes the two roles together, and then applies them. |
480 | |
481 | There is no built in type system. C<isa> is verified with a coderef, if you |
8146585e |
482 | need complex types, just make a library of coderefs, or better yet, functions |
5902c1fc |
483 | that return quoted subs. L<MooX::Types::MooseLike> provides a similar API |
484 | to L<MooseX::Types::Moose> so that you can write |
485 | |
486 | has days_to_live => (is => 'ro', isa => Int); |
487 | |
488 | and have it work with both; it is hoped that providing only subrefs as an |
489 | API will encourage the use of other type systems as well, since it's |
490 | probably the weakest part of Moose design-wise. |
8146585e |
491 | |
2e575bcd |
492 | C<initializer> is not supported in core since the author considers it to be a |
f88623a1 |
493 | bad idea but may be supported by an extension in future. Meanwhile C<trigger> or |
494 | C<coerce> are more likely to be able to fulfill your needs. |
8146585e |
495 | |
496 | There is no meta object. If you need this level of complexity you wanted |
2e575bcd |
497 | L<Moose> - Moo succeeds at being small because it explicitly does not |
498 | provide a metaprotocol. |
8146585e |
499 | |
2e575bcd |
500 | No support for C<super>, C<override>, C<inner>, or C<augment> - override can |
501 | be handled by around albeit with a little more typing, and the author considers |
502 | augment to be a bad idea. |
8146585e |
503 | |
f2eac33e |
504 | The C<dump> method is not provided by default. The author suggests loading |
c96a6326 |
505 | L<Devel::Dwarn> into C<main::> (via C<perl -MDevel::Dwarn ...> for example) and |
506 | using C<$obj-E<gt>$::Dwarn()> instead. |
507 | |
8146585e |
508 | L</default> only supports coderefs, because doing otherwise is usually a |
509 | mistake anyway. |
510 | |
511 | C<lazy_build> is not supported per se, but of course it will work if you |
512 | manually set all the options it implies. |
513 | |
2e575bcd |
514 | C<auto_deref> is not supported since the author considers it a bad idea. |
8146585e |
515 | |
2e575bcd |
516 | C<documentation> is not supported since it's a very poor replacement for POD. |
40f3e3aa |
517 | |
69673ca7 |
518 | Handling of warnings: when you C<use Moo> we enable FATAL warnings. The nearest |
519 | similar invocation for L<Moose> would be: |
520 | |
521 | use Moose; |
522 | use warnings FATAL => "all"; |
523 | |
524 | Additionally, L<Moo> supports a set of attribute option shortcuts intended to |
525 | reduce common boilerplate. The set of shortcuts is the same as in the L<Moose> |
239d4711 |
526 | module L<MooseX::AttributeShortcuts> as of its version 0.009+. So if you: |
69673ca7 |
527 | |
528 | package MyClass; |
529 | use Moo; |
530 | |
531 | The nearest L<Moose> invocation would be: |
532 | |
533 | package MyClass; |
534 | |
535 | use Moose; |
536 | use warnings FATAL => "all"; |
537 | use MooseX::AttributeShortcuts; |
538 | |
5902c1fc |
539 | or, if you're inheriting from a non-Moose class, |
540 | |
541 | package MyClass; |
542 | |
543 | use Moose; |
544 | use MooseX::NonMoose; |
545 | use warnings FATAL => "all"; |
546 | use MooseX::AttributeShortcuts; |
547 | |
548 | Finally, Moose requires you to call |
549 | |
550 | __PACKAGE__->meta->make_immutable; |
551 | |
552 | at the end of your class to get an inlined (i.e. not horribly slow) |
553 | constructor. Moo does it automatically the first time ->new is called |
554 | on your class. |
555 | |
660f3db2 |
556 | =head1 SUPPORT |
557 | |
558 | IRC: #web-simple on irc.perl.org |
559 | |
40f3e3aa |
560 | =head1 AUTHOR |
561 | |
562 | mst - Matt S. Trout (cpan:MSTROUT) <mst@shadowcat.co.uk> |
563 | |
564 | =head1 CONTRIBUTORS |
565 | |
5da684a2 |
566 | dg - David Leadbeater (cpan:DGL) <dgl@dgl.cx> |
567 | |
568 | frew - Arthur Axel "fREW" Schmidt (cpan:FREW) <frioux@gmail.com> |
569 | |
570 | hobbs - Andrew Rodland (cpan:ARODLAND) <arodland@cpan.org> |
571 | |
572 | jnap - John Napiorkowski (cpan:JJNAPIORK) <jjn1056@yahoo.com> |
573 | |
574 | ribasushi - Peter Rabbitson (cpan:RIBASUSHI) <ribasushi@cpan.org> |
40f3e3aa |
575 | |
11f7a042 |
576 | chip - Chip Salzenberg (cpan:CHIPS) <chip@pobox.com> |
577 | |
a17be455 |
578 | ajgb - Alex J. G. Burzyński (cpan:AJGB) <ajgb@cpan.org> |
579 | |
7b8177f8 |
580 | doy - Jesse Luehrs (cpan:DOY) <doy at tozt dot net> |
581 | |
1fb2de92 |
582 | perigrin - Chris Prather (cpan:PERIGRIN) <chris@prather.org> |
583 | |
40f3e3aa |
584 | =head1 COPYRIGHT |
585 | |
a958e36d |
586 | Copyright (c) 2010-2011 the Moo L</AUTHOR> and L</CONTRIBUTORS> |
40f3e3aa |
587 | as listed above. |
588 | |
589 | =head1 LICENSE |
590 | |
591 | This library is free software and may be distributed under the same terms |
592 | as perl itself. |
593 | |
594 | =cut |