2 package Moose::Meta::Attribute;
7 use Scalar::Util 'blessed', 'weaken';
10 our $VERSION = '0.50';
11 our $AUTHORITY = 'cpan:STEVAN';
13 use Moose::Meta::Method::Accessor;
15 use Moose::Util::TypeConstraints ();
17 use base 'Class::MOP::Attribute';
19 # options which are not directly used
20 # but we store them for metadata purposes
21 __PACKAGE__->meta->add_attribute('isa' => (reader => '_isa_metadata'));
22 __PACKAGE__->meta->add_attribute('does' => (reader => '_does_metadata'));
23 __PACKAGE__->meta->add_attribute('is' => (reader => '_is_metadata'));
25 # these are actual options for the attrs
26 __PACKAGE__->meta->add_attribute('required' => (reader => 'is_required' ));
27 __PACKAGE__->meta->add_attribute('lazy' => (reader => 'is_lazy' ));
28 __PACKAGE__->meta->add_attribute('lazy_build' => (reader => 'is_lazy_build' ));
29 __PACKAGE__->meta->add_attribute('coerce' => (reader => 'should_coerce' ));
30 __PACKAGE__->meta->add_attribute('weak_ref' => (reader => 'is_weak_ref' ));
31 __PACKAGE__->meta->add_attribute('auto_deref' => (reader => 'should_auto_deref'));
32 __PACKAGE__->meta->add_attribute('type_constraint' => (
33 reader => 'type_constraint',
34 predicate => 'has_type_constraint',
36 __PACKAGE__->meta->add_attribute('trigger' => (
38 predicate => 'has_trigger',
40 __PACKAGE__->meta->add_attribute('handles' => (
42 predicate => 'has_handles',
44 __PACKAGE__->meta->add_attribute('documentation' => (
45 reader => 'documentation',
46 predicate => 'has_documentation',
48 __PACKAGE__->meta->add_attribute('traits' => (
49 reader => 'applied_traits',
50 predicate => 'has_applied_traits',
54 # we need to have a ->does method in here to
55 # more easily support traits, and the introspection
56 # of those traits. So in order to do this we
57 # just alias Moose::Object's version of it.
59 *does = \&Moose::Object::does;
63 my $class = ( ref $self && $self->associated_class ) || "Moose::Meta::Class";
64 unshift @_, "message" if @_ % 2 == 1;
65 unshift @_, attr => $self if ref $self;
67 goto $class->can("throw_error"); # to avoid incrementing depth by 1
71 my ($class, $name, %options) = @_;
72 $class->_process_options($name, \%options) unless $options{__hack_no_process_options}; # used from clone()... YECHKKK FIXME ICKY YUCK GROSS
73 return $class->SUPER::new($name, %options);
76 sub interpolate_class_and_new {
77 my ($class, $name, @args) = @_;
79 my ( $new_class, @traits ) = $class->interpolate_class(@args);
81 $new_class->new($name, @args, ( scalar(@traits) ? ( traits => \@traits ) : () ) );
84 sub interpolate_class {
85 my ($class, %options) = @_;
87 $class = ref($class) || $class;
89 if ( my $metaclass_name = delete $options{metaclass} ) {
90 my $new_class = Moose::Util::resolve_metaclass_alias( Attribute => $metaclass_name );
92 if ( $class ne $new_class ) {
93 if ( $new_class->can("interpolate_class") ) {
94 return $new_class->interpolate_class(%options);
103 if (my $traits = $options{traits}) {
104 if ( @traits = grep { not $class->does($_) } map {
105 Moose::Util::resolve_metatrait_alias( Attribute => $_ )
109 my $anon_class = Moose::Meta::Class->create_anon_class(
110 superclasses => [ $class ],
111 roles => [ @traits ],
115 $class = $anon_class->name;
119 return ( wantarray ? ( $class, @traits ) : $class );
122 sub clone_and_inherit_options {
123 my ($self, %options) = @_;
125 # you can change default, required, coerce, documentation, lazy, handles, builder, type_constraint (explicitly or using isa/does), metaclass and traits
127 foreach my $legal_option (qw(default coerce required documentation lazy handles builder type_constraint)) {
128 if (exists $options{$legal_option}) {
129 $actual_options{$legal_option} = $options{$legal_option};
130 delete $options{$legal_option};
136 if (blessed($options{isa}) && $options{isa}->isa('Moose::Meta::TypeConstraint')) {
137 $type_constraint = $options{isa};
140 $type_constraint = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($options{isa});
141 (defined $type_constraint)
142 || $self->throw_error("Could not find the type constraint '" . $options{isa} . "'", data => $options{isa});
145 $actual_options{type_constraint} = $type_constraint;
146 delete $options{isa};
149 if ($options{does}) {
151 if (blessed($options{does}) && $options{does}->isa('Moose::Meta::TypeConstraint')) {
152 $type_constraint = $options{does};
155 $type_constraint = Moose::Util::TypeConstraints::find_or_create_does_type_constraint($options{does});
156 (defined $type_constraint)
157 || $self->throw_error("Could not find the type constraint '" . $options{does} . "'", data => $options{does});
160 $actual_options{type_constraint} = $type_constraint;
161 delete $options{does};
165 # this doesn't apply to Class::MOP::Attributes,
166 # so we can ignore it for them.
168 if ($self->can('interpolate_class')) {
169 ( $actual_options{metaclass}, my @traits ) = $self->interpolate_class(%options);
172 my @all_traits = grep { $seen{$_}++ } @{ $self->applied_traits || [] }, @traits;
173 $actual_options{traits} = \@all_traits if @all_traits;
175 delete @options{qw(metaclass traits)};
178 (scalar keys %options == 0)
179 || $self->throw_error("Illegal inherited options => (" . (join ', ' => keys %options) . ")", data => \%options);
182 $self->clone(%actual_options);
186 my ( $self, %params ) = @_;
188 my $class = $params{metaclass} || ref $self;
190 if ( 0 and $class eq ref $self ) {
191 return $self->SUPER::clone(%params);
193 my ( @init, @non_init );
195 foreach my $attr ( grep { $_->has_value($self) } $self->meta->compute_all_applicable_attributes ) {
196 push @{ $attr->has_init_arg ? \@init : \@non_init }, $attr;
199 my %new_params = ( ( map { $_->init_arg => $_->get_value($self) } @init ), %params );
201 my $name = delete $new_params{name};
203 my $clone = $class->new($name, %new_params, __hack_no_process_options => 1 );
205 foreach my $attr ( @non_init ) {
206 $attr->set_value($clone, $attr->get_value($self));
214 sub _process_options {
215 my ($class, $name, $options) = @_;
217 if (exists $options->{is}) {
221 is => ro, writer => _foo # turns into (reader => foo, writer => _foo) as before
222 is => rw, writer => _foo # turns into (reader => foo, writer => _foo)
223 is => rw, accessor => _foo # turns into (accessor => _foo)
224 is => ro, accessor => _foo # error, accesor is rw
228 if ($options->{is} eq 'ro') {
229 $class->throw_error("Cannot define an accessor name on a read-only attribute, accessors are read/write", data => $options)
230 if exists $options->{accessor};
231 $options->{reader} ||= $name;
233 elsif ($options->{is} eq 'rw') {
234 if ($options->{writer}) {
235 $options->{reader} ||= $name;
238 $options->{accessor} ||= $name;
242 $class->throw_error("I do not understand this option (is => " . $options->{is} . ") on attribute $name", data => $options->{is});
246 if (exists $options->{isa}) {
247 if (exists $options->{does}) {
248 if (eval { $options->{isa}->can('does') }) {
249 ($options->{isa}->does($options->{does}))
250 || $class->throw_error("Cannot have an isa option and a does option if the isa does not do the does on attribute $name", data => $options);
253 $class->throw_error("Cannot have an isa option which cannot ->does() on attribute $name", data => $options);
257 # allow for anon-subtypes here ...
258 if (blessed($options->{isa}) && $options->{isa}->isa('Moose::Meta::TypeConstraint')) {
259 $options->{type_constraint} = $options->{isa};
262 $options->{type_constraint} = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($options->{isa});
265 elsif (exists $options->{does}) {
266 # allow for anon-subtypes here ...
267 if (blessed($options->{does}) && $options->{does}->isa('Moose::Meta::TypeConstraint')) {
268 $options->{type_constraint} = $options->{does};
271 $options->{type_constraint} = Moose::Util::TypeConstraints::find_or_create_does_type_constraint($options->{does});
275 if (exists $options->{coerce} && $options->{coerce}) {
276 (exists $options->{type_constraint})
277 || $class->throw_error("You cannot have coercion without specifying a type constraint on attribute $name", data => $options);
278 $class->throw_error("You cannot have a weak reference to a coerced value on attribute $name", data => $options)
279 if $options->{weak_ref};
282 if (exists $options->{trigger}) {
283 ('CODE' eq ref $options->{trigger})
284 || $class->throw_error("Trigger must be a CODE ref", data => $options->{trigger});
287 if (exists $options->{auto_deref} && $options->{auto_deref}) {
288 (exists $options->{type_constraint})
289 || $class->throw_error("You cannot auto-dereference without specifying a type constraint on attribute $name", data => $options);
290 ($options->{type_constraint}->is_a_type_of('ArrayRef') ||
291 $options->{type_constraint}->is_a_type_of('HashRef'))
292 || $class->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute $name", data => $options);
295 if (exists $options->{lazy_build} && $options->{lazy_build} == 1) {
296 $class->throw_error("You can not use lazy_build and default for the same attribute $name", data => $options)
297 if exists $options->{default};
298 $options->{lazy} = 1;
299 $options->{required} = 1;
300 $options->{builder} ||= "_build_${name}";
302 $options->{clearer} ||= "_clear${name}";
303 $options->{predicate} ||= "_has${name}";
306 $options->{clearer} ||= "clear_${name}";
307 $options->{predicate} ||= "has_${name}";
311 if (exists $options->{lazy} && $options->{lazy}) {
312 (exists $options->{default} || defined $options->{builder} )
313 || $class->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it", data => $options);
316 if ( $options->{required} && !( ( !exists $options->{init_arg} || defined $options->{init_arg} ) || exists $options->{default} || defined $options->{builder} ) ) {
317 $class->throw_error("You cannot have a required attribute ($name) without a default, builder, or an init_arg", data => $options);
322 sub initialize_instance_slot {
323 my ($self, $meta_instance, $instance, $params) = @_;
324 my $init_arg = $self->init_arg();
325 # try to fetch the init arg from the %params ...
329 if ( defined($init_arg) and exists $params->{$init_arg}) {
330 $val = $params->{$init_arg};
334 # skip it if it's lazy
335 return if $self->is_lazy;
336 # and die if it's required and doesn't have a default value
337 $self->throw_error("Attribute (" . $self->name . ") is required", object => $instance, data => $params)
338 if $self->is_required && !$self->has_default && !$self->has_builder;
340 # if nothing was in the %params, we can use the
341 # attribute's default value (if it has one)
342 if ($self->has_default) {
343 $val = $self->default($instance);
346 elsif ($self->has_builder) {
347 if (my $builder = $instance->can($self->builder)){
348 $val = $instance->$builder;
352 $self->throw_error(blessed($instance)." does not support builder method '".$self->builder."' for attribute '" . $self->name . "'", object => $instance, data => $params);
357 return unless $value_is_set;
359 if ($self->has_type_constraint) {
360 my $type_constraint = $self->type_constraint;
361 if ($self->should_coerce && $type_constraint->has_coercion) {
362 $val = $type_constraint->coerce($val);
364 $type_constraint->check($val)
365 || $self->throw_error("Attribute ("
367 . ") does not pass the type constraint because: "
368 . $type_constraint->get_message($val), data => $val, object => $instance);
371 $self->set_initial_value($instance, $val);
372 $meta_instance->weaken_slot_value($instance, $self->name)
373 if ref $val && $self->is_weak_ref;
379 # this duplicates too much code from
380 # Class::MOP::Attribute, we need to
381 # refactor these bits eventually.
383 sub _set_initial_slot_value {
384 my ($self, $meta_instance, $instance, $value) = @_;
386 my $slot_name = $self->name;
388 return $meta_instance->set_slot_value($instance, $slot_name, $value)
389 unless $self->has_initializer;
391 my ($type_constraint, $can_coerce);
392 if ($self->has_type_constraint) {
393 $type_constraint = $self->type_constraint;
394 $can_coerce = ($self->should_coerce && $type_constraint->has_coercion);
399 if ($type_constraint) {
400 $val = $type_constraint->coerce($val)
402 $type_constraint->check($val)
403 || $self->throw_error("Attribute ("
405 . ") does not pass the type constraint because: "
406 . $type_constraint->get_message($val), data => $val, object => $instance);
408 $meta_instance->set_slot_value($instance, $slot_name, $val);
411 my $initializer = $self->initializer;
413 # most things will just want to set a value, so make it first arg
414 $instance->$initializer($value, $callback, $self);
418 my ($self, $instance, @args) = @_;
419 my $value = $args[0];
421 my $attr_name = $self->name;
423 if ($self->is_required and not @args) {
424 $self->throw_error("Attribute ($attr_name) is required", object => $instance);
427 if ($self->has_type_constraint) {
429 my $type_constraint = $self->type_constraint;
431 if ($self->should_coerce) {
432 $value = $type_constraint->coerce($value);
434 $type_constraint->_compiled_type_constraint->($value)
435 || $self->throw_error("Attribute ("
437 . ") does not pass the type constraint because "
438 . $type_constraint->get_message($value), object => $instance, data => $value);
441 my $meta_instance = Class::MOP::Class->initialize(blessed($instance))
444 $meta_instance->set_slot_value($instance, $attr_name, $value);
446 if (ref $value && $self->is_weak_ref) {
447 $meta_instance->weaken_slot_value($instance, $attr_name);
450 if ($self->has_trigger) {
451 $self->trigger->($instance, $value, $self);
456 my ($self, $instance) = @_;
458 if ($self->is_lazy) {
459 unless ($self->has_value($instance)) {
460 if ($self->has_default) {
461 my $default = $self->default($instance);
462 $self->set_initial_value($instance, $default);
463 } elsif ( $self->has_builder ) {
464 if (my $builder = $instance->can($self->builder)){
465 $self->set_initial_value($instance, $instance->$builder);
468 $self->throw_error(blessed($instance)
469 . " does not support builder method '"
471 . "' for attribute '"
473 . "'", object => $instance);
477 $self->set_initial_value($instance, undef);
482 if ($self->should_auto_deref) {
484 my $type_constraint = $self->type_constraint;
486 if ($type_constraint->is_a_type_of('ArrayRef')) {
487 my $rv = $self->SUPER::get_value($instance);
488 return unless defined $rv;
489 return wantarray ? @{ $rv } : $rv;
491 elsif ($type_constraint->is_a_type_of('HashRef')) {
492 my $rv = $self->SUPER::get_value($instance);
493 return unless defined $rv;
494 return wantarray ? %{ $rv } : $rv;
497 $self->throw_error("Can not auto de-reference the type constraint '" . $type_constraint->name . "'", object => $instance, data => $type_constraint);
503 return $self->SUPER::get_value($instance);
507 ## installing accessors
509 sub accessor_metaclass { 'Moose::Meta::Method::Accessor' }
511 sub install_accessors {
513 $self->SUPER::install_accessors(@_);
515 if ($self->has_handles) {
518 # Here we canonicalize the 'handles' option
519 # this will sort out any details and always
520 # return an hash of methods which we want
521 # to delagate to, see that method for details
522 my %handles = $self->_canonicalize_handles();
524 # find the accessor method for this attribute
525 my $accessor = $self->get_read_method_ref;
526 # then unpack it if we need too ...
527 $accessor = $accessor->body if blessed $accessor;
529 # install the delegation ...
530 my $associated_class = $self->associated_class;
531 foreach my $handle (keys %handles) {
532 my $method_to_call = $handles{$handle};
533 my $class_name = $associated_class->name;
534 my $name = "${class_name}::${handle}";
536 (!$associated_class->has_method($handle))
537 || $self->throw_error("You cannot overwrite a locally defined method ($handle) with a delegation", method => $handle);
540 # handles is not allowed to delegate
541 # any of these methods, as they will
542 # override the ones in your class, which
543 # is almost certainly not what you want.
545 # FIXME warn when $handle was explicitly specified, but not if the source is a regex or something
546 #cluck("Not delegating method '$handle' because it is a core method") and
547 next if $class_name->isa("Moose::Object") and $handle =~ /^BUILD|DEMOLISH$/ || Moose::Object->can($handle);
549 if ('CODE' eq ref($method_to_call)) {
550 $associated_class->add_method($handle => Class::MOP::subname($name, $method_to_call));
554 # we used to do a goto here, but the
555 # goto didn't handle failure correctly
556 # (it just returned nothing), so I took
557 # that out. However, the more I thought
558 # about it, the less I liked it doing
559 # the goto, and I prefered the act of
560 # delegation being actually represented
561 # in the stack trace.
563 $associated_class->add_method($handle => Class::MOP::subname($name, sub {
564 my $instance = shift;
565 my $proxy = $instance->$accessor();
567 || $self->throw_error("Cannot delegate $handle to $method_to_call because " .
568 "the value of " . $self->name . " is not defined", method => $method_to_call, object => $instance);
569 $proxy->$method_to_call(@_);
578 # private methods to help delegation ...
580 sub _canonicalize_handles {
582 my $handles = $self->handles;
583 if (my $handle_type = ref($handles)) {
584 if ($handle_type eq 'HASH') {
587 elsif ($handle_type eq 'ARRAY') {
588 return map { $_ => $_ } @{$handles};
590 elsif ($handle_type eq 'Regexp') {
591 ($self->has_type_constraint)
592 || $self->throw_error("Cannot delegate methods based on a RegExpr without a type constraint (isa)", data => $handles);
593 return map { ($_ => $_) }
594 grep { /$handles/ } $self->_get_delegate_method_list;
596 elsif ($handle_type eq 'CODE') {
597 return $handles->($self, $self->_find_delegate_metaclass);
600 $self->throw_error("Unable to canonicalize the 'handles' option with $handles", data => $handles);
604 my $role_meta = eval { $handles->meta };
606 $self->throw_error("Unable to canonicalize the 'handles' option with $handles because : $@", data => $handles, error => $@);
609 (blessed $role_meta && $role_meta->isa('Moose::Meta::Role'))
610 || $self->throw_error("Unable to canonicalize the 'handles' option with $handles because ->meta is not a Moose::Meta::Role", data => $handles);
612 return map { $_ => $_ } (
613 $role_meta->get_method_list,
614 $role_meta->get_required_method_list
619 sub _find_delegate_metaclass {
621 if (my $class = $self->_isa_metadata) {
622 # if the class does have
623 # a meta method, use it
624 return $class->meta if $class->can('meta');
625 # otherwise we might be
626 # dealing with a non-Moose
627 # class, and need to make
629 return Moose::Meta::Class->initialize($class);
631 elsif (my $role = $self->_does_metadata) {
632 # our role will always have
637 $self->throw_error("Cannot find delegate metaclass for attribute " . $self->name);
641 sub _get_delegate_method_list {
643 my $meta = $self->_find_delegate_metaclass;
644 if ($meta->isa('Class::MOP::Class')) {
645 return map { $_->{name} } # NOTE: !never! delegate &meta
646 grep { $_->{class} ne 'Moose::Object' && $_->{name} ne 'meta' }
647 $meta->compute_all_applicable_methods;
649 elsif ($meta->isa('Moose::Meta::Role')) {
650 return $meta->get_method_list;
653 $self->throw_error("Unable to recognize the delegate metaclass '$meta'", data => $meta);
657 package Moose::Meta::Attribute::Custom::Moose;
658 sub register_implementation { 'Moose::Meta::Attribute' }
668 Moose::Meta::Attribute - The Moose attribute metaclass
672 This is a subclass of L<Class::MOP::Attribute> with Moose specific
675 For the most part, the only time you will ever encounter an
676 instance of this class is if you are doing some serious deep
677 introspection. To really understand this class, you need to refer
678 to the L<Class::MOP::Attribute> documentation.
682 =head2 Overridden methods
684 These methods override methods in L<Class::MOP::Attribute> and add
685 Moose specific features. You can safely assume though that they
686 will behave just as L<Class::MOP::Attribute> does.
696 =item B<initialize_instance_slot>
698 =item B<install_accessors>
700 =item B<accessor_metaclass>
706 eval { $point->meta->get_attribute('x')->set_value($point, 'fourty-two') };
711 I<Attribute (x) does not pass the type constraint (Int) with 'fourty-two'>
713 Before setting the value, a check is made on the type constraint of
714 the attribute, if it has one, to see if the value passes it. If the
715 value fails to pass, the set operation dies with a L<Carp/confess>.
717 Any coercion to convert values is done before checking the type constraint.
719 To check a value against a type constraint before setting it, fetch the
720 attribute instance using L<Class::MOP::Class/find_attribute_by_name>,
721 fetch the type_constraint from the attribute using L<Moose::Meta::Attribute/type_constraint>
722 and call L<Moose::Meta::TypeConstraint/check>. See L<Moose::Cookbook::RecipeX>
727 =head2 Additional Moose features
729 Moose attributes support type-constraint checking, weak reference
730 creation and type coercion.
736 Delegates to C<associated_class> or C<Moose::Meta::Class> if there is none.
738 =item B<interpolate_class_and_new>
740 =item B<interpolate_class>
742 When called as a class method causes interpretation of the C<metaclass> and
745 =item B<clone_and_inherit_options>
747 This is to support the C<has '+foo'> feature, it clones an attribute
748 from a superclass and allows a very specific set of changes to be made
751 =item B<has_type_constraint>
753 Returns true if this meta-attribute has a type constraint.
755 =item B<type_constraint>
757 A read-only accessor for this meta-attribute's type constraint. For
758 more information on what you can do with this, see the documentation
759 for L<Moose::Meta::TypeConstraint>.
763 Returns true if this meta-attribute performs delegation.
767 This returns the value which was passed into the handles option.
771 Returns true if this meta-attribute produces a weak reference.
775 Returns true if this meta-attribute is required to have a value.
779 Returns true if this meta-attribute should be initialized lazily.
781 NOTE: lazy attributes, B<must> have a C<default> or C<builder> field set.
783 =item B<is_lazy_build>
785 Returns true if this meta-attribute should be initialized lazily through
786 the builder generated by lazy_build. Using C<lazy_build =E<gt> 1> will
787 make your attribute required and lazy. In addition it will set the builder, clearer
788 and predicate options for you using the following convention.
790 #If your attribute name starts with an underscore:
791 has '_foo' => (lazy_build => 1);
793 has '_foo' => (lazy => 1, required => 1, predicate => '_has_foo', clearer => '_clear_foo', builder => '_build__foo);
795 has '_foo' => (lazy => 1, required => 1, predicate => '_has_foo', clearer => '_clear_foo', default => sub{shift->_build__foo});
797 #If your attribute name does not start with an underscore:
798 has 'foo' => (lazy_build => 1);
800 has 'foo' => (lazy => 1, required => 1, predicate => 'has_foo', clearer => 'clear_foo', builder => '_build_foo);
802 has 'foo' => (lazy => 1, required => 1, predicate => 'has_foo', clearer => 'clear_foo', default => sub{shift->_build_foo});
804 The reason for the different naming of the C<builder> is that the C<builder>
805 method is a private method while the C<clearer> and C<predicate> methods
808 NOTE: This means your class should provide a method whose name matches the value
809 of the builder part, in this case _build__foo or _build_foo.
811 =item B<should_coerce>
813 Returns true if this meta-attribute should perform type coercion.
815 =item B<should_auto_deref>
817 Returns true if this meta-attribute should perform automatic
820 NOTE: This can only be done for attributes whose type constraint is
821 either I<ArrayRef> or I<HashRef>.
825 Returns true if this meta-attribute has a trigger set.
829 This is a CODE reference which will be executed every time the
830 value of an attribute is assigned. The CODE ref will get two values,
831 the invocant and the new value. This can be used to handle I<basic>
832 bi-directional relations.
834 =item B<documentation>
836 This is a string which contains the documentation for this attribute.
837 It serves no direct purpose right now, but it might in the future
838 in some kind of automated documentation system perhaps.
840 =item B<has_documentation>
842 Returns true if this meta-attribute has any documentation.
844 =item B<applied_traits>
846 This will return the ARRAY ref of all the traits applied to this
847 attribute, or if no traits have been applied, it returns C<undef>.
849 =item B<has_applied_traits>
851 Returns true if this meta-attribute has any traits applied.
857 All complex software has bugs lurking in it, and this module is no
858 exception. If you find a bug please either email me, or add the bug
863 Stevan Little E<lt>stevan@iinteractive.comE<gt>
865 Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
867 =head1 COPYRIGHT AND LICENSE
869 Copyright 2006-2008 by Infinity Interactive, Inc.
871 L<http://www.iinteractive.com>
873 This library is free software; you can redistribute it and/or modify
874 it under the same terms as Perl itself.