2 package Moose::Meta::Attribute;
7 use Scalar::Util 'blessed', 'weaken';
11 our $VERSION = '0.50';
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',
55 # we need to have a ->does method in here to
56 # more easily support traits, and the introspection
57 # of those traits. So in order to do this we
58 # just alias Moose::Object's version of it.
60 *does = \&Moose::Object::does;
64 my $class = ( ref $self && $self->associated_class ) || "Moose::Meta::Class";
65 unshift @_, "message" if @_ % 2 == 1;
66 unshift @_, attr => $self if ref $self;
68 goto $class->can("throw_error"); # to avoid incrementing depth by 1
72 my ($class, $name, %options) = @_;
73 $class->_process_options($name, \%options) unless $options{__hack_no_process_options}; # used from clone()... YECHKKK FIXME ICKY YUCK GROSS
74 return $class->SUPER::new($name, %options);
77 sub interpolate_class_and_new {
78 my ($class, $name, @args) = @_;
80 my ( $new_class, @traits ) = $class->interpolate_class(@args);
82 $new_class->new($name, @args, ( scalar(@traits) ? ( traits => \@traits ) : () ) );
85 sub interpolate_class {
86 my ($class, %options) = @_;
88 $class = ref($class) || $class;
90 if ( my $metaclass_name = delete $options{metaclass} ) {
91 my $new_class = Moose::Util::resolve_metaclass_alias( Attribute => $metaclass_name );
93 if ( $class ne $new_class ) {
94 if ( $new_class->can("interpolate_class") ) {
95 return $new_class->interpolate_class(%options);
104 if (my $traits = $options{traits}) {
105 if ( @traits = grep { not $class->does($_) } map {
106 Moose::Util::resolve_metatrait_alias( Attribute => $_ )
110 my $anon_class = Moose::Meta::Class->create_anon_class(
111 superclasses => [ $class ],
112 roles => [ @traits ],
116 $class = $anon_class->name;
120 return ( wantarray ? ( $class, @traits ) : $class );
123 sub clone_and_inherit_options {
124 my ($self, %options) = @_;
126 # you can change default, required, coerce, documentation, lazy, handles, builder, type_constraint (explicitly or using isa/does), metaclass and traits
128 foreach my $legal_option (qw(default coerce required documentation lazy handles builder type_constraint)) {
129 if (exists $options{$legal_option}) {
130 $actual_options{$legal_option} = $options{$legal_option};
131 delete $options{$legal_option};
137 if (blessed($options{isa}) && $options{isa}->isa('Moose::Meta::TypeConstraint')) {
138 $type_constraint = $options{isa};
141 $type_constraint = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($options{isa});
142 (defined $type_constraint)
143 || $self->throw_error("Could not find the type constraint '" . $options{isa} . "'", data => $options{isa});
146 $actual_options{type_constraint} = $type_constraint;
147 delete $options{isa};
150 if ($options{does}) {
152 if (blessed($options{does}) && $options{does}->isa('Moose::Meta::TypeConstraint')) {
153 $type_constraint = $options{does};
156 $type_constraint = Moose::Util::TypeConstraints::find_or_create_does_type_constraint($options{does});
157 (defined $type_constraint)
158 || $self->throw_error("Could not find the type constraint '" . $options{does} . "'", data => $options{does});
161 $actual_options{type_constraint} = $type_constraint;
162 delete $options{does};
166 # this doesn't apply to Class::MOP::Attributes,
167 # so we can ignore it for them.
169 if ($self->can('interpolate_class')) {
170 ( $actual_options{metaclass}, my @traits ) = $self->interpolate_class(%options);
173 my @all_traits = grep { $seen{$_}++ } @{ $self->applied_traits || [] }, @traits;
174 $actual_options{traits} = \@all_traits if @all_traits;
176 delete @options{qw(metaclass traits)};
179 (scalar keys %options == 0)
180 || $self->throw_error("Illegal inherited options => (" . (join ', ' => keys %options) . ")", data => \%options);
183 $self->clone(%actual_options);
187 my ( $self, %params ) = @_;
189 my $class = $params{metaclass} || ref $self;
191 if ( 0 and $class eq ref $self ) {
192 return $self->SUPER::clone(%params);
194 my ( @init, @non_init );
196 foreach my $attr ( grep { $_->has_value($self) } $self->meta->compute_all_applicable_attributes ) {
197 push @{ $attr->has_init_arg ? \@init : \@non_init }, $attr;
200 my %new_params = ( ( map { $_->init_arg => $_->get_value($self) } @init ), %params );
202 my $name = delete $new_params{name};
204 my $clone = $class->new($name, %new_params, __hack_no_process_options => 1 );
206 foreach my $attr ( @non_init ) {
207 $attr->set_value($clone, $attr->get_value($self));
215 sub _process_options {
216 my ($class, $name, $options) = @_;
218 if (exists $options->{is}) {
222 is => ro, writer => _foo # turns into (reader => foo, writer => _foo) as before
223 is => rw, writer => _foo # turns into (reader => foo, writer => _foo)
224 is => rw, accessor => _foo # turns into (accessor => _foo)
225 is => ro, accessor => _foo # error, accesor is rw
229 if ($options->{is} eq 'ro') {
230 $class->throw_error("Cannot define an accessor name on a read-only attribute, accessors are read/write", data => $options)
231 if exists $options->{accessor};
232 $options->{reader} ||= $name;
234 elsif ($options->{is} eq 'rw') {
235 if ($options->{writer}) {
236 $options->{reader} ||= $name;
239 $options->{accessor} ||= $name;
243 $class->throw_error("I do not understand this option (is => " . $options->{is} . ") on attribute $name", data => $options->{is});
247 if (exists $options->{isa}) {
248 if (exists $options->{does}) {
249 if (eval { $options->{isa}->can('does') }) {
250 ($options->{isa}->does($options->{does}))
251 || $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);
254 $class->throw_error("Cannot have an isa option which cannot ->does() on attribute $name", data => $options);
258 # allow for anon-subtypes here ...
259 if (blessed($options->{isa}) && $options->{isa}->isa('Moose::Meta::TypeConstraint')) {
260 $options->{type_constraint} = $options->{isa};
263 $options->{type_constraint} = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($options->{isa});
266 elsif (exists $options->{does}) {
267 # allow for anon-subtypes here ...
268 if (blessed($options->{does}) && $options->{does}->isa('Moose::Meta::TypeConstraint')) {
269 $options->{type_constraint} = $options->{does};
272 $options->{type_constraint} = Moose::Util::TypeConstraints::find_or_create_does_type_constraint($options->{does});
276 if (exists $options->{coerce} && $options->{coerce}) {
277 (exists $options->{type_constraint})
278 || $class->throw_error("You cannot have coercion without specifying a type constraint on attribute $name", data => $options);
279 $class->throw_error("You cannot have a weak reference to a coerced value on attribute $name", data => $options)
280 if $options->{weak_ref};
283 if (exists $options->{trigger}) {
284 ('CODE' eq ref $options->{trigger})
285 || $class->throw_error("Trigger must be a CODE ref", data => $options->{trigger});
288 if (exists $options->{auto_deref} && $options->{auto_deref}) {
289 (exists $options->{type_constraint})
290 || $class->throw_error("You cannot auto-dereference without specifying a type constraint on attribute $name", data => $options);
291 ($options->{type_constraint}->is_a_type_of('ArrayRef') ||
292 $options->{type_constraint}->is_a_type_of('HashRef'))
293 || $class->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute $name", data => $options);
296 if (exists $options->{lazy_build} && $options->{lazy_build} == 1) {
297 $class->throw_error("You can not use lazy_build and default for the same attribute $name", data => $options)
298 if exists $options->{default};
299 $options->{lazy} = 1;
300 $options->{required} = 1;
301 $options->{builder} ||= "_build_${name}";
303 $options->{clearer} ||= "_clear${name}";
304 $options->{predicate} ||= "_has${name}";
307 $options->{clearer} ||= "clear_${name}";
308 $options->{predicate} ||= "has_${name}";
312 if (exists $options->{lazy} && $options->{lazy}) {
313 (exists $options->{default} || defined $options->{builder} )
314 || $class->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it", data => $options);
317 if ( $options->{required} && !( ( !exists $options->{init_arg} || defined $options->{init_arg} ) || exists $options->{default} || defined $options->{builder} ) ) {
318 $class->throw_error("You cannot have a required attribute ($name) without a default, builder, or an init_arg", data => $options);
323 sub initialize_instance_slot {
324 my ($self, $meta_instance, $instance, $params) = @_;
325 my $init_arg = $self->init_arg();
326 # try to fetch the init arg from the %params ...
330 if ( defined($init_arg) and exists $params->{$init_arg}) {
331 $val = $params->{$init_arg};
335 # skip it if it's lazy
336 return if $self->is_lazy;
337 # and die if it's required and doesn't have a default value
338 $self->throw_error("Attribute (" . $self->name . ") is required", object => $instance, data => $params)
339 if $self->is_required && !$self->has_default && !$self->has_builder;
341 # if nothing was in the %params, we can use the
342 # attribute's default value (if it has one)
343 if ($self->has_default) {
344 $val = $self->default($instance);
347 elsif ($self->has_builder) {
348 if (my $builder = $instance->can($self->builder)){
349 $val = $instance->$builder;
353 $self->throw_error(blessed($instance)." does not support builder method '".$self->builder."' for attribute '" . $self->name . "'", object => $instance, data => $params);
358 return unless $value_is_set;
360 if ($self->has_type_constraint) {
361 my $type_constraint = $self->type_constraint;
362 if ($self->should_coerce && $type_constraint->has_coercion) {
363 $val = $type_constraint->coerce($val);
365 $type_constraint->check($val)
366 || $self->throw_error("Attribute ("
368 . ") does not pass the type constraint because: "
369 . $type_constraint->get_message($val), data => $val, object => $instance);
372 $self->set_initial_value($instance, $val);
373 $meta_instance->weaken_slot_value($instance, $self->name)
374 if ref $val && $self->is_weak_ref;
380 # this duplicates too much code from
381 # Class::MOP::Attribute, we need to
382 # refactor these bits eventually.
384 sub _set_initial_slot_value {
385 my ($self, $meta_instance, $instance, $value) = @_;
387 my $slot_name = $self->name;
389 return $meta_instance->set_slot_value($instance, $slot_name, $value)
390 unless $self->has_initializer;
392 my ($type_constraint, $can_coerce);
393 if ($self->has_type_constraint) {
394 $type_constraint = $self->type_constraint;
395 $can_coerce = ($self->should_coerce && $type_constraint->has_coercion);
400 if ($type_constraint) {
401 $val = $type_constraint->coerce($val)
403 $type_constraint->check($val)
404 || $self->throw_error("Attribute ("
406 . ") does not pass the type constraint because: "
407 . $type_constraint->get_message($val), data => $val, object => $instance);
409 $meta_instance->set_slot_value($instance, $slot_name, $val);
412 my $initializer = $self->initializer;
414 # most things will just want to set a value, so make it first arg
415 $instance->$initializer($value, $callback, $self);
419 my ($self, $instance, @args) = @_;
420 my $value = $args[0];
422 my $attr_name = $self->name;
424 if ($self->is_required and not @args) {
425 $self->throw_error("Attribute ($attr_name) is required", object => $instance);
428 if ($self->has_type_constraint) {
430 my $type_constraint = $self->type_constraint;
432 if ($self->should_coerce) {
433 $value = $type_constraint->coerce($value);
435 $type_constraint->_compiled_type_constraint->($value)
436 || $self->throw_error("Attribute ("
438 . ") does not pass the type constraint because "
439 . $type_constraint->get_message($value), object => $instance, data => $value);
442 my $meta_instance = Class::MOP::Class->initialize(blessed($instance))
445 $meta_instance->set_slot_value($instance, $attr_name, $value);
447 if (ref $value && $self->is_weak_ref) {
448 $meta_instance->weaken_slot_value($instance, $attr_name);
451 if ($self->has_trigger) {
452 $self->trigger->($instance, $value, $self);
457 my ($self, $instance) = @_;
459 if ($self->is_lazy) {
460 unless ($self->has_value($instance)) {
461 if ($self->has_default) {
462 my $default = $self->default($instance);
463 $self->set_initial_value($instance, $default);
464 } elsif ( $self->has_builder ) {
465 if (my $builder = $instance->can($self->builder)){
466 $self->set_initial_value($instance, $instance->$builder);
469 $self->throw_error(blessed($instance)
470 . " does not support builder method '"
472 . "' for attribute '"
474 . "'", object => $instance);
478 $self->set_initial_value($instance, undef);
483 if ($self->should_auto_deref) {
485 my $type_constraint = $self->type_constraint;
487 if ($type_constraint->is_a_type_of('ArrayRef')) {
488 my $rv = $self->SUPER::get_value($instance);
489 return unless defined $rv;
490 return wantarray ? @{ $rv } : $rv;
492 elsif ($type_constraint->is_a_type_of('HashRef')) {
493 my $rv = $self->SUPER::get_value($instance);
494 return unless defined $rv;
495 return wantarray ? %{ $rv } : $rv;
498 $self->throw_error("Can not auto de-reference the type constraint '" . $type_constraint->name . "'", object => $instance, data => $type_constraint);
504 return $self->SUPER::get_value($instance);
508 ## installing accessors
510 sub accessor_metaclass { 'Moose::Meta::Method::Accessor' }
512 sub install_accessors {
514 $self->SUPER::install_accessors(@_);
516 if ($self->has_handles) {
519 # Here we canonicalize the 'handles' option
520 # this will sort out any details and always
521 # return an hash of methods which we want
522 # to delagate to, see that method for details
523 my %handles = $self->_canonicalize_handles();
525 # find the accessor method for this attribute
526 my $accessor = $self->get_read_method_ref;
527 # then unpack it if we need too ...
528 $accessor = $accessor->body if blessed $accessor;
530 # install the delegation ...
531 my $associated_class = $self->associated_class;
532 foreach my $handle (keys %handles) {
533 my $method_to_call = $handles{$handle};
534 my $class_name = $associated_class->name;
535 my $name = "${class_name}::${handle}";
537 (!$associated_class->has_method($handle))
538 || $self->throw_error("You cannot overwrite a locally defined method ($handle) with a delegation", method => $handle);
541 # handles is not allowed to delegate
542 # any of these methods, as they will
543 # override the ones in your class, which
544 # is almost certainly not what you want.
546 # FIXME warn when $handle was explicitly specified, but not if the source is a regex or something
547 #cluck("Not delegating method '$handle' because it is a core method") and
548 next if $class_name->isa("Moose::Object") and $handle =~ /^BUILD|DEMOLISH$/ || Moose::Object->can($handle);
550 if ('CODE' eq ref($method_to_call)) {
551 $associated_class->add_method($handle => Class::MOP::subname($name, $method_to_call));
555 # we used to do a goto here, but the
556 # goto didn't handle failure correctly
557 # (it just returned nothing), so I took
558 # that out. However, the more I thought
559 # about it, the less I liked it doing
560 # the goto, and I prefered the act of
561 # delegation being actually represented
562 # in the stack trace.
564 $associated_class->add_method($handle => Class::MOP::subname($name, sub {
565 my $instance = shift;
566 my $proxy = $instance->$accessor();
568 || $self->throw_error("Cannot delegate $handle to $method_to_call because " .
569 "the value of " . $self->name . " is not defined", method => $method_to_call, object => $instance);
570 $proxy->$method_to_call(@_);
579 # private methods to help delegation ...
581 sub _canonicalize_handles {
583 my $handles = $self->handles;
584 if (my $handle_type = ref($handles)) {
585 if ($handle_type eq 'HASH') {
588 elsif ($handle_type eq 'ARRAY') {
589 return map { $_ => $_ } @{$handles};
591 elsif ($handle_type eq 'Regexp') {
592 ($self->has_type_constraint)
593 || $self->throw_error("Cannot delegate methods based on a RegExpr without a type constraint (isa)", data => $handles);
594 return map { ($_ => $_) }
595 grep { /$handles/ } $self->_get_delegate_method_list;
597 elsif ($handle_type eq 'CODE') {
598 return $handles->($self, $self->_find_delegate_metaclass);
601 $self->throw_error("Unable to canonicalize the 'handles' option with $handles", data => $handles);
605 my $role_meta = eval { $handles->meta };
607 $self->throw_error("Unable to canonicalize the 'handles' option with $handles because : $@", data => $handles, error => $@);
610 (blessed $role_meta && $role_meta->isa('Moose::Meta::Role'))
611 || $self->throw_error("Unable to canonicalize the 'handles' option with $handles because ->meta is not a Moose::Meta::Role", data => $handles);
613 return map { $_ => $_ } (
614 $role_meta->get_method_list,
615 $role_meta->get_required_method_list
620 sub _find_delegate_metaclass {
622 if (my $class = $self->_isa_metadata) {
623 # if the class does have
624 # a meta method, use it
625 return $class->meta if $class->can('meta');
626 # otherwise we might be
627 # dealing with a non-Moose
628 # class, and need to make
630 return Moose::Meta::Class->initialize($class);
632 elsif (my $role = $self->_does_metadata) {
633 # our role will always have
638 $self->throw_error("Cannot find delegate metaclass for attribute " . $self->name);
642 sub _get_delegate_method_list {
644 my $meta = $self->_find_delegate_metaclass;
645 if ($meta->isa('Class::MOP::Class')) {
646 return map { $_->{name} } # NOTE: !never! delegate &meta
647 grep { $_->{class} ne 'Moose::Object' && $_->{name} ne 'meta' }
648 $meta->compute_all_applicable_methods;
650 elsif ($meta->isa('Moose::Meta::Role')) {
651 return $meta->get_method_list;
654 $self->throw_error("Unable to recognize the delegate metaclass '$meta'", data => $meta);
658 package Moose::Meta::Attribute::Custom::Moose;
659 sub register_implementation { 'Moose::Meta::Attribute' }
669 Moose::Meta::Attribute - The Moose attribute metaclass
673 This is a subclass of L<Class::MOP::Attribute> with Moose specific
676 For the most part, the only time you will ever encounter an
677 instance of this class is if you are doing some serious deep
678 introspection. To really understand this class, you need to refer
679 to the L<Class::MOP::Attribute> documentation.
683 =head2 Overridden methods
685 These methods override methods in L<Class::MOP::Attribute> and add
686 Moose specific features. You can safely assume though that they
687 will behave just as L<Class::MOP::Attribute> does.
697 =item B<initialize_instance_slot>
699 =item B<install_accessors>
701 =item B<accessor_metaclass>
707 eval { $point->meta->get_attribute('x')->set_value($point, 'fourty-two') };
712 I<Attribute (x) does not pass the type constraint (Int) with 'fourty-two'>
714 Before setting the value, a check is made on the type constraint of
715 the attribute, if it has one, to see if the value passes it. If the
716 value fails to pass, the set operation dies with a L<Carp/confess>.
718 Any coercion to convert values is done before checking the type constraint.
720 To check a value against a type constraint before setting it, fetch the
721 attribute instance using L<Class::MOP::Class/find_attribute_by_name>,
722 fetch the type_constraint from the attribute using L<Moose::Meta::Attribute/type_constraint>
723 and call L<Moose::Meta::TypeConstraint/check>. See L<Moose::Cookbook::RecipeX>
728 =head2 Additional Moose features
730 Moose attributes support type-constraint checking, weak reference
731 creation and type coercion.
737 Delegates to C<associated_class> or C<Moose::Meta::Class> if there is none.
739 =item B<interpolate_class_and_new>
741 =item B<interpolate_class>
743 When called as a class method causes interpretation of the C<metaclass> and
746 =item B<clone_and_inherit_options>
748 This is to support the C<has '+foo'> feature, it clones an attribute
749 from a superclass and allows a very specific set of changes to be made
752 =item B<has_type_constraint>
754 Returns true if this meta-attribute has a type constraint.
756 =item B<type_constraint>
758 A read-only accessor for this meta-attribute's type constraint. For
759 more information on what you can do with this, see the documentation
760 for L<Moose::Meta::TypeConstraint>.
764 Returns true if this meta-attribute performs delegation.
768 This returns the value which was passed into the handles option.
772 Returns true if this meta-attribute produces a weak reference.
776 Returns true if this meta-attribute is required to have a value.
780 Returns true if this meta-attribute should be initialized lazily.
782 NOTE: lazy attributes, B<must> have a C<default> or C<builder> field set.
784 =item B<is_lazy_build>
786 Returns true if this meta-attribute should be initialized lazily through
787 the builder generated by lazy_build. Using C<lazy_build =E<gt> 1> will
788 make your attribute required and lazy. In addition it will set the builder, clearer
789 and predicate options for you using the following convention.
791 #If your attribute name starts with an underscore:
792 has '_foo' => (lazy_build => 1);
794 has '_foo' => (lazy => 1, required => 1, predicate => '_has_foo', clearer => '_clear_foo', builder => '_build__foo);
796 has '_foo' => (lazy => 1, required => 1, predicate => '_has_foo', clearer => '_clear_foo', default => sub{shift->_build__foo});
798 #If your attribute name does not start with an underscore:
799 has 'foo' => (lazy_build => 1);
801 has 'foo' => (lazy => 1, required => 1, predicate => 'has_foo', clearer => 'clear_foo', builder => '_build_foo);
803 has 'foo' => (lazy => 1, required => 1, predicate => 'has_foo', clearer => 'clear_foo', default => sub{shift->_build_foo});
805 The reason for the different naming of the C<builder> is that the C<builder>
806 method is a private method while the C<clearer> and C<predicate> methods
809 NOTE: This means your class should provide a method whose name matches the value
810 of the builder part, in this case _build__foo or _build_foo.
812 =item B<should_coerce>
814 Returns true if this meta-attribute should perform type coercion.
816 =item B<should_auto_deref>
818 Returns true if this meta-attribute should perform automatic
821 NOTE: This can only be done for attributes whose type constraint is
822 either I<ArrayRef> or I<HashRef>.
826 Returns true if this meta-attribute has a trigger set.
830 This is a CODE reference which will be executed every time the
831 value of an attribute is assigned. The CODE ref will get two values,
832 the invocant and the new value. This can be used to handle I<basic>
833 bi-directional relations.
835 =item B<documentation>
837 This is a string which contains the documentation for this attribute.
838 It serves no direct purpose right now, but it might in the future
839 in some kind of automated documentation system perhaps.
841 =item B<has_documentation>
843 Returns true if this meta-attribute has any documentation.
845 =item B<applied_traits>
847 This will return the ARRAY ref of all the traits applied to this
848 attribute, or if no traits have been applied, it returns C<undef>.
850 =item B<has_applied_traits>
852 Returns true if this meta-attribute has any traits applied.
858 All complex software has bugs lurking in it, and this module is no
859 exception. If you find a bug please either email me, or add the bug
864 Stevan Little E<lt>stevan@iinteractive.comE<gt>
866 Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
868 =head1 COPYRIGHT AND LICENSE
870 Copyright 2006-2008 by Infinity Interactive, Inc.
872 L<http://www.iinteractive.com>
874 This library is free software; you can redistribute it and/or modify
875 it under the same terms as Perl itself.