2 package Moose::Meta::Attribute;
7 use Scalar::Util 'blessed', 'weaken';
11 our $VERSION = '0.54';
12 our $AUTHORITY = 'cpan:STEVAN';
14 use Moose::Meta::Method::Accessor;
16 use Moose::Util::TypeConstraints ();
18 use base 'Class::MOP::Attribute';
20 # options which are not directly used
21 # but we store them for metadata purposes
22 __PACKAGE__->meta->add_attribute('isa' => (reader => '_isa_metadata'));
23 __PACKAGE__->meta->add_attribute('does' => (reader => '_does_metadata'));
24 __PACKAGE__->meta->add_attribute('is' => (reader => '_is_metadata'));
26 # these are actual options for the attrs
27 __PACKAGE__->meta->add_attribute('required' => (reader => 'is_required' ));
28 __PACKAGE__->meta->add_attribute('lazy' => (reader => 'is_lazy' ));
29 __PACKAGE__->meta->add_attribute('lazy_build' => (reader => 'is_lazy_build' ));
30 __PACKAGE__->meta->add_attribute('coerce' => (reader => 'should_coerce' ));
31 __PACKAGE__->meta->add_attribute('weak_ref' => (reader => 'is_weak_ref' ));
32 __PACKAGE__->meta->add_attribute('auto_deref' => (reader => 'should_auto_deref'));
33 __PACKAGE__->meta->add_attribute('type_constraint' => (
34 reader => 'type_constraint',
35 predicate => 'has_type_constraint',
37 __PACKAGE__->meta->add_attribute('trigger' => (
39 predicate => 'has_trigger',
41 __PACKAGE__->meta->add_attribute('handles' => (
43 predicate => 'has_handles',
45 __PACKAGE__->meta->add_attribute('documentation' => (
46 reader => 'documentation',
47 predicate => 'has_documentation',
49 __PACKAGE__->meta->add_attribute('traits' => (
50 reader => 'applied_traits',
51 predicate => 'has_applied_traits',
54 # we need to have a ->does method in here to
55 # more easily support traits, and the introspection
56 # of those traits. We extend the does check to look
57 # for metatrait aliases.
59 my ($self, $role_name) = @_;
61 Moose::Util::resolve_metatrait_alias(Attribute => $role_name)
63 return 0 if !defined($name); # failed to load class
64 return Moose::Object::does($self, $name);
68 my ($class, $name, %options) = @_;
69 $class->_process_options($name, \%options) unless $options{__hack_no_process_options}; # used from clone()... YECHKKK FIXME ICKY YUCK GROSS
70 return $class->SUPER::new($name, %options);
73 sub interpolate_class_and_new {
74 my ($class, $name, @args) = @_;
76 my ( $new_class, @traits ) = $class->interpolate_class(@args);
78 $new_class->new($name, @args, ( scalar(@traits) ? ( traits => \@traits ) : () ) );
81 sub interpolate_class {
82 my ($class, %options) = @_;
84 $class = ref($class) || $class;
86 if ( my $metaclass_name = delete $options{metaclass} ) {
87 my $new_class = Moose::Util::resolve_metaclass_alias( Attribute => $metaclass_name );
89 if ( $class ne $new_class ) {
90 if ( $new_class->can("interpolate_class") ) {
91 return $new_class->interpolate_class(%options);
100 if (my $traits = $options{traits}) {
101 if ( @traits = grep { not $class->does($_) } map {
102 Moose::Util::resolve_metatrait_alias( Attribute => $_ )
106 my $anon_class = Moose::Meta::Class->create_anon_class(
107 superclasses => [ $class ],
108 roles => [ @traits ],
112 $class = $anon_class->name;
116 return ( wantarray ? ( $class, @traits ) : $class );
121 my @legal_options_for_inheritance = qw(
122 default coerce required
123 documentation lazy handles
124 builder type_constraint
127 sub legal_options_for_inheritance { @legal_options_for_inheritance }
130 # This method *must* be able to handle
131 # Class::MOP::Attribute instances as
132 # well. Yes, I know that is wrong, but
133 # apparently we didn't realize it was
134 # doing that and now we have some code
135 # which is dependent on it. The real
136 # solution of course is to push this
137 # feature back up into Class::MOP::Attribute
138 # but I not right now, I am too lazy.
139 # However if you are reading this and
140 # looking for something to do,.. please
143 sub clone_and_inherit_options {
144 my ($self, %options) = @_;
151 # we may want to extends a Class::MOP::Attribute
152 # in which case we need to be able to use the
153 # core set of legal options that have always
154 # been here. But we allows Moose::Meta::Attribute
155 # instances to changes them.
157 my @legal_options = $self->can('legal_options_for_inheritance')
158 ? $self->legal_options_for_inheritance
159 : @legal_options_for_inheritance;
161 foreach my $legal_option (@legal_options) {
162 if (exists $options{$legal_option}) {
163 $actual_options{$legal_option} = $options{$legal_option};
164 delete $options{$legal_option};
170 if (blessed($options{isa}) && $options{isa}->isa('Moose::Meta::TypeConstraint')) {
171 $type_constraint = $options{isa};
174 $type_constraint = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($options{isa});
175 (defined $type_constraint)
176 || confess "Could not find the type constraint '" . $options{isa} . "'";
179 $actual_options{type_constraint} = $type_constraint;
180 delete $options{isa};
183 if ($options{does}) {
185 if (blessed($options{does}) && $options{does}->isa('Moose::Meta::TypeConstraint')) {
186 $type_constraint = $options{does};
189 $type_constraint = Moose::Util::TypeConstraints::find_or_create_does_type_constraint($options{does});
190 (defined $type_constraint)
191 || confess "Could not find the type constraint '" . $options{does} . "'";
194 $actual_options{type_constraint} = $type_constraint;
195 delete $options{does};
199 # this doesn't apply to Class::MOP::Attributes,
200 # so we can ignore it for them.
202 if ($self->can('interpolate_class')) {
203 ( $actual_options{metaclass}, my @traits ) = $self->interpolate_class(%options);
206 my @all_traits = grep { $seen{$_}++ } @{ $self->applied_traits || [] }, @traits;
207 $actual_options{traits} = \@all_traits if @all_traits;
209 delete @options{qw(metaclass traits)};
212 (scalar keys %options == 0)
213 || confess "Illegal inherited options => (" . (join ', ' => keys %options) . ")";
216 $self->clone(%actual_options);
220 my ( $self, %params ) = @_;
222 my $class = $params{metaclass} || ref $self;
224 if ( 0 and $class eq ref $self ) {
225 return $self->SUPER::clone(%params);
227 my ( @init, @non_init );
229 foreach my $attr ( grep { $_->has_value($self) } $self->meta->compute_all_applicable_attributes ) {
230 push @{ $attr->has_init_arg ? \@init : \@non_init }, $attr;
233 my %new_params = ( ( map { $_->init_arg => $_->get_value($self) } @init ), %params );
235 my $name = delete $new_params{name};
237 my $clone = $class->new($name, %new_params, __hack_no_process_options => 1 );
239 foreach my $attr ( @non_init ) {
240 $attr->set_value($clone, $attr->get_value($self));
248 sub _process_options {
249 my ($class, $name, $options) = @_;
251 if (exists $options->{is}) {
253 ### -------------------------
254 ## is => ro, writer => _foo # turns into (reader => foo, writer => _foo) as before
255 ## is => rw, writer => _foo # turns into (reader => foo, writer => _foo)
256 ## is => rw, accessor => _foo # turns into (accessor => _foo)
257 ## is => ro, accessor => _foo # error, accesor is rw
258 ### -------------------------
260 if ($options->{is} eq 'ro') {
261 confess "Cannot define an accessor name on a read-only attribute, accessors are read/write"
262 if exists $options->{accessor};
263 $options->{reader} ||= $name;
265 elsif ($options->{is} eq 'rw') {
266 if ($options->{writer}) {
267 $options->{reader} ||= $name;
270 $options->{accessor} ||= $name;
274 confess "I do not understand this option (is => " . $options->{is} . ") on attribute ($name)"
278 if (exists $options->{isa}) {
279 if (exists $options->{does}) {
280 if (eval { $options->{isa}->can('does') }) {
281 ($options->{isa}->does($options->{does}))
282 || confess "Cannot have an isa option and a does option if the isa does not do the does on attribute ($name)";
285 confess "Cannot have an isa option which cannot ->does() on attribute ($name)";
289 # allow for anon-subtypes here ...
290 if (blessed($options->{isa}) && $options->{isa}->isa('Moose::Meta::TypeConstraint')) {
291 $options->{type_constraint} = $options->{isa};
294 $options->{type_constraint} = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($options->{isa});
297 elsif (exists $options->{does}) {
298 # allow for anon-subtypes here ...
299 if (blessed($options->{does}) && $options->{does}->isa('Moose::Meta::TypeConstraint')) {
300 $options->{type_constraint} = $options->{does};
303 $options->{type_constraint} = Moose::Util::TypeConstraints::find_or_create_does_type_constraint($options->{does});
307 if (exists $options->{coerce} && $options->{coerce}) {
308 (exists $options->{type_constraint})
309 || confess "You cannot have coercion without specifying a type constraint on attribute ($name)";
310 confess "You cannot have a weak reference to a coerced value on attribute ($name)"
311 if $options->{weak_ref};
314 if (exists $options->{trigger}) {
315 ('CODE' eq ref $options->{trigger})
316 || confess "Trigger must be a CODE ref on attribute ($name)";
319 if (exists $options->{auto_deref} && $options->{auto_deref}) {
320 (exists $options->{type_constraint})
321 || confess "You cannot auto-dereference without specifying a type constraint on attribute ($name)";
322 ($options->{type_constraint}->is_a_type_of('ArrayRef') ||
323 $options->{type_constraint}->is_a_type_of('HashRef'))
324 || confess "You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)";
327 if (exists $options->{lazy_build} && $options->{lazy_build} == 1) {
328 confess("You can not use lazy_build and default for the same attribute ($name)")
329 if exists $options->{default};
330 $options->{lazy} = 1;
331 $options->{required} = 1;
332 $options->{builder} ||= "_build_${name}";
334 $options->{clearer} ||= "_clear${name}";
335 $options->{predicate} ||= "_has${name}";
338 $options->{clearer} ||= "clear_${name}";
339 $options->{predicate} ||= "has_${name}";
343 if (exists $options->{lazy} && $options->{lazy}) {
344 (exists $options->{default} || defined $options->{builder} )
345 || confess "You cannot have lazy attribute ($name) without specifying a default value for it";
348 if ( $options->{required} && !( ( !exists $options->{init_arg} || defined $options->{init_arg} ) || exists $options->{default} || defined $options->{builder} ) ) {
349 confess "You cannot have a required attribute ($name) without a default, builder, or an init_arg";
354 sub initialize_instance_slot {
355 my ($self, $meta_instance, $instance, $params) = @_;
356 my $init_arg = $self->init_arg();
357 # try to fetch the init arg from the %params ...
361 if ( defined($init_arg) and exists $params->{$init_arg}) {
362 $val = $params->{$init_arg};
366 # skip it if it's lazy
367 return if $self->is_lazy;
368 # and die if it's required and doesn't have a default value
369 confess "Attribute (" . $self->name . ") is required"
370 if $self->is_required && !$self->has_default && !$self->has_builder;
372 # if nothing was in the %params, we can use the
373 # attribute's default value (if it has one)
374 if ($self->has_default) {
375 $val = $self->default($instance);
378 elsif ($self->has_builder) {
379 if (my $builder = $instance->can($self->builder)){
380 $val = $instance->$builder;
384 confess(blessed($instance)." does not support builder method '".$self->builder."' for attribute '" . $self->name . "'");
389 return unless $value_is_set;
391 if ($self->has_type_constraint) {
392 my $type_constraint = $self->type_constraint;
393 if ($self->should_coerce && $type_constraint->has_coercion) {
394 $val = $type_constraint->coerce($val);
396 $type_constraint->check($val)
397 || confess "Attribute ("
399 . ") does not pass the type constraint because: "
400 . $type_constraint->get_message($val);
403 $self->set_initial_value($instance, $val);
404 $meta_instance->weaken_slot_value($instance, $self->name)
405 if ref $val && $self->is_weak_ref;
411 # this duplicates too much code from
412 # Class::MOP::Attribute, we need to
413 # refactor these bits eventually.
415 sub _set_initial_slot_value {
416 my ($self, $meta_instance, $instance, $value) = @_;
418 my $slot_name = $self->name;
420 return $meta_instance->set_slot_value($instance, $slot_name, $value)
421 unless $self->has_initializer;
423 my ($type_constraint, $can_coerce);
424 if ($self->has_type_constraint) {
425 $type_constraint = $self->type_constraint;
426 $can_coerce = ($self->should_coerce && $type_constraint->has_coercion);
431 if ($type_constraint) {
432 $val = $type_constraint->coerce($val)
434 $type_constraint->check($val)
435 || confess "Attribute ("
437 . ") does not pass the type constraint because: "
438 . $type_constraint->get_message($val);
440 $meta_instance->set_slot_value($instance, $slot_name, $val);
443 my $initializer = $self->initializer;
445 # most things will just want to set a value, so make it first arg
446 $instance->$initializer($value, $callback, $self);
450 my ($self, $instance, @args) = @_;
451 my $value = $args[0];
453 my $attr_name = $self->name;
455 if ($self->is_required and not @args) {
456 confess "Attribute ($attr_name) is required";
459 if ($self->has_type_constraint) {
461 my $type_constraint = $self->type_constraint;
463 if ($self->should_coerce) {
464 $value = $type_constraint->coerce($value);
466 $type_constraint->_compiled_type_constraint->($value)
467 || confess "Attribute ("
469 . ") does not pass the type constraint because "
470 . $type_constraint->get_message($value);
473 my $meta_instance = Class::MOP::Class->initialize(blessed($instance))
476 $meta_instance->set_slot_value($instance, $attr_name, $value);
478 if (ref $value && $self->is_weak_ref) {
479 $meta_instance->weaken_slot_value($instance, $attr_name);
482 if ($self->has_trigger) {
483 $self->trigger->($instance, $value, $self);
488 my ($self, $instance) = @_;
490 if ($self->is_lazy) {
491 unless ($self->has_value($instance)) {
492 if ($self->has_default) {
493 my $default = $self->default($instance);
494 $self->set_initial_value($instance, $default);
495 } elsif ( $self->has_builder ) {
496 if (my $builder = $instance->can($self->builder)){
497 $self->set_initial_value($instance, $instance->$builder);
500 confess(blessed($instance)
501 . " does not support builder method '"
503 . "' for attribute '"
509 $self->set_initial_value($instance, undef);
514 if ($self->should_auto_deref) {
516 my $type_constraint = $self->type_constraint;
518 if ($type_constraint->is_a_type_of('ArrayRef')) {
519 my $rv = $self->SUPER::get_value($instance);
520 return unless defined $rv;
521 return wantarray ? @{ $rv } : $rv;
523 elsif ($type_constraint->is_a_type_of('HashRef')) {
524 my $rv = $self->SUPER::get_value($instance);
525 return unless defined $rv;
526 return wantarray ? %{ $rv } : $rv;
529 confess "Can not auto de-reference the type constraint '" . $type_constraint->name . "'";
535 return $self->SUPER::get_value($instance);
539 ## installing accessors
541 sub accessor_metaclass { 'Moose::Meta::Method::Accessor' }
543 sub install_accessors {
545 $self->SUPER::install_accessors(@_);
546 $self->install_delegation if $self->has_handles;
550 sub install_delegation {
554 # Here we canonicalize the 'handles' option
555 # this will sort out any details and always
556 # return an hash of methods which we want
557 # to delagate to, see that method for details
558 my %handles = $self->_canonicalize_handles();
560 # find the accessor method for this attribute
561 my $accessor = $self->get_read_method_ref;
562 # then unpack it if we need too ...
563 $accessor = $accessor->body if blessed $accessor;
565 # install the delegation ...
566 my $associated_class = $self->associated_class;
567 foreach my $handle (keys %handles) {
568 my $method_to_call = $handles{$handle};
569 my $class_name = $associated_class->name;
570 my $name = "${class_name}::${handle}";
572 (!$associated_class->has_method($handle))
573 || confess "You cannot overwrite a locally defined method ($handle) with a delegation";
576 # handles is not allowed to delegate
577 # any of these methods, as they will
578 # override the ones in your class, which
579 # is almost certainly not what you want.
581 # FIXME warn when $handle was explicitly specified, but not if the source is a regex or something
582 #cluck("Not delegating method '$handle' because it is a core method") and
583 next if $class_name->isa("Moose::Object") and $handle =~ /^BUILD|DEMOLISH$/ || Moose::Object->can($handle);
585 if ('CODE' eq ref($method_to_call)) {
586 $associated_class->add_method($handle => Class::MOP::subname($name, $method_to_call));
590 # we used to do a goto here, but the
591 # goto didn't handle failure correctly
592 # (it just returned nothing), so I took
593 # that out. However, the more I thought
594 # about it, the less I liked it doing
595 # the goto, and I prefered the act of
596 # delegation being actually represented
597 # in the stack trace.
599 $associated_class->add_method($handle => Class::MOP::subname($name, sub {
600 my $proxy = (shift)->$accessor();
602 || confess "Cannot delegate $handle to $method_to_call because " .
603 "the value of " . $self->name . " is not defined";
604 $proxy->$method_to_call(@_);
610 # private methods to help delegation ...
612 sub _canonicalize_handles {
614 my $handles = $self->handles;
615 if (my $handle_type = ref($handles)) {
616 if ($handle_type eq 'HASH') {
619 elsif ($handle_type eq 'ARRAY') {
620 return map { $_ => $_ } @{$handles};
622 elsif ($handle_type eq 'Regexp') {
623 ($self->has_type_constraint)
624 || confess "Cannot delegate methods based on a RegExpr without a type constraint (isa)";
625 return map { ($_ => $_) }
626 grep { /$handles/ } $self->_get_delegate_method_list;
628 elsif ($handle_type eq 'CODE') {
629 return $handles->($self, $self->_find_delegate_metaclass);
632 confess "Unable to canonicalize the 'handles' option with $handles";
636 my $role_meta = eval { $handles->meta };
638 confess "Unable to canonicalize the 'handles' option with $handles because : $@";
641 (blessed $role_meta && $role_meta->isa('Moose::Meta::Role'))
642 || confess "Unable to canonicalize the 'handles' option with $handles because ->meta is not a Moose::Meta::Role";
644 return map { $_ => $_ } (
645 $role_meta->get_method_list,
646 $role_meta->get_required_method_list
651 sub _find_delegate_metaclass {
653 if (my $class = $self->_isa_metadata) {
654 # if the class does have
655 # a meta method, use it
656 return $class->meta if $class->can('meta');
657 # otherwise we might be
658 # dealing with a non-Moose
659 # class, and need to make
661 return Moose::Meta::Class->initialize($class);
663 elsif (my $role = $self->_does_metadata) {
664 # our role will always have
669 confess "Cannot find delegate metaclass for attribute " . $self->name;
673 sub _get_delegate_method_list {
675 my $meta = $self->_find_delegate_metaclass;
676 if ($meta->isa('Class::MOP::Class')) {
677 return map { $_->{name} } # NOTE: !never! delegate &meta
678 grep { $_->{class} ne 'Moose::Object' && $_->{name} ne 'meta' }
679 $meta->compute_all_applicable_methods;
681 elsif ($meta->isa('Moose::Meta::Role')) {
682 return $meta->get_method_list;
685 confess "Unable to recognize the delegate metaclass '$meta'";
689 package Moose::Meta::Attribute::Custom::Moose;
690 sub register_implementation { 'Moose::Meta::Attribute' }
700 Moose::Meta::Attribute - The Moose attribute metaclass
704 This is a subclass of L<Class::MOP::Attribute> with Moose specific
707 For the most part, the only time you will ever encounter an
708 instance of this class is if you are doing some serious deep
709 introspection. To really understand this class, you need to refer
710 to the L<Class::MOP::Attribute> documentation.
714 =head2 Overridden methods
716 These methods override methods in L<Class::MOP::Attribute> and add
717 Moose specific features. You can safely assume though that they
718 will behave just as L<Class::MOP::Attribute> does.
728 =item B<initialize_instance_slot>
730 =item B<install_accessors>
732 =item B<install_delegation>
734 =item B<accessor_metaclass>
740 eval { $point->meta->get_attribute('x')->set_value($point, 'fourty-two') };
745 I<Attribute (x) does not pass the type constraint (Int) with 'fourty-two'>
747 Before setting the value, a check is made on the type constraint of
748 the attribute, if it has one, to see if the value passes it. If the
749 value fails to pass, the set operation dies with a L<Carp/confess>.
751 Any coercion to convert values is done before checking the type constraint.
753 To check a value against a type constraint before setting it, fetch the
754 attribute instance using L<Class::MOP::Class/find_attribute_by_name>,
755 fetch the type_constraint from the attribute using L<Moose::Meta::Attribute/type_constraint>
756 and call L<Moose::Meta::TypeConstraint/check>. See L<Moose::Cookbook::RecipeX>
761 =head2 Additional Moose features
763 Moose attributes support type-constraint checking, weak reference
764 creation and type coercion.
768 =item B<interpolate_class_and_new>
770 =item B<interpolate_class>
772 When called as a class method causes interpretation of the C<metaclass> and
775 =item B<clone_and_inherit_options>
777 This is to support the C<has '+foo'> feature, it clones an attribute
778 from a superclass and allows a very specific set of changes to be made
781 =item B<legal_options_for_inheritance>
783 Whitelist with options you can change. You can overload it in your custom
784 metaclass to allow your options be inheritable.
786 =item B<has_type_constraint>
788 Returns true if this meta-attribute has a type constraint.
790 =item B<type_constraint>
792 A read-only accessor for this meta-attribute's type constraint. For
793 more information on what you can do with this, see the documentation
794 for L<Moose::Meta::TypeConstraint>.
798 Returns true if this meta-attribute performs delegation.
802 This returns the value which was passed into the handles option.
806 Returns true if this meta-attribute produces a weak reference.
810 Returns true if this meta-attribute is required to have a value.
814 Returns true if this meta-attribute should be initialized lazily.
816 NOTE: lazy attributes, B<must> have a C<default> or C<builder> field set.
818 =item B<is_lazy_build>
820 Returns true if this meta-attribute should be initialized lazily through
821 the builder generated by lazy_build. Using C<lazy_build =E<gt> 1> will
822 make your attribute required and lazy. In addition it will set the builder, clearer
823 and predicate options for you using the following convention.
825 #If your attribute name starts with an underscore:
826 has '_foo' => (lazy_build => 1);
828 has '_foo' => (lazy => 1, required => 1, predicate => '_has_foo', clearer => '_clear_foo', builder => '_build__foo);
830 has '_foo' => (lazy => 1, required => 1, predicate => '_has_foo', clearer => '_clear_foo', default => sub{shift->_build__foo});
832 #If your attribute name does not start with an underscore:
833 has 'foo' => (lazy_build => 1);
835 has 'foo' => (lazy => 1, required => 1, predicate => 'has_foo', clearer => 'clear_foo', builder => '_build_foo);
837 has 'foo' => (lazy => 1, required => 1, predicate => 'has_foo', clearer => 'clear_foo', default => sub{shift->_build_foo});
839 The reason for the different naming of the C<builder> is that the C<builder>
840 method is a private method while the C<clearer> and C<predicate> methods
843 NOTE: This means your class should provide a method whose name matches the value
844 of the builder part, in this case _build__foo or _build_foo.
846 =item B<should_coerce>
848 Returns true if this meta-attribute should perform type coercion.
850 =item B<should_auto_deref>
852 Returns true if this meta-attribute should perform automatic
855 NOTE: This can only be done for attributes whose type constraint is
856 either I<ArrayRef> or I<HashRef>.
860 Returns true if this meta-attribute has a trigger set.
864 This is a CODE reference which will be executed every time the
865 value of an attribute is assigned. The CODE ref will get two values,
866 the invocant and the new value. This can be used to handle I<basic>
867 bi-directional relations.
869 =item B<documentation>
871 This is a string which contains the documentation for this attribute.
872 It serves no direct purpose right now, but it might in the future
873 in some kind of automated documentation system perhaps.
875 =item B<has_documentation>
877 Returns true if this meta-attribute has any documentation.
879 =item B<applied_traits>
881 This will return the ARRAY ref of all the traits applied to this
882 attribute, or if no traits have been applied, it returns C<undef>.
884 =item B<has_applied_traits>
886 Returns true if this meta-attribute has any traits applied.
892 All complex software has bugs lurking in it, and this module is no
893 exception. If you find a bug please either email me, or add the bug
898 Stevan Little E<lt>stevan@iinteractive.comE<gt>
900 Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
902 =head1 COPYRIGHT AND LICENSE
904 Copyright 2006-2008 by Infinity Interactive, Inc.
906 L<http://www.iinteractive.com>
908 This library is free software; you can redistribute it and/or modify
909 it under the same terms as Perl itself.