9 use Scalar::Util 'blessed', 'reftype';
11 use Sub::Name 'subname';
13 use UNIVERSAL::require;
17 use Moose::Meta::Class;
18 use Moose::Meta::Attribute;
19 use Moose::Meta::TypeConstraint;
20 use Moose::Meta::TypeCoercion;
23 use Moose::Util::TypeConstraints;
29 # we should never export to main
30 return if $pkg eq 'main';
32 Moose::Util::TypeConstraints->import($pkg);
34 # make a subtype for each Moose class
37 => where { $_->isa($pkg) };
40 if ($pkg->can('meta')) {
42 (blessed($meta) && $meta->isa('Class::MOP::Class'))
43 || confess "Whoops, not møøsey enough";
46 $meta = Moose::Meta::Class->initialize($pkg => (
47 ':attribute_metaclass' => 'Moose::Meta::Attribute'
49 $meta->add_method('meta' => sub {
50 # re-initialize so it inherits properly
51 Moose::Meta::Class->initialize($pkg => (
52 ':attribute_metaclass' => 'Moose::Meta::Attribute'
58 # &alias_method will install the method, but it
59 # will not name it with
62 $meta->alias_method('extends' => subname 'Moose::extends' => sub {
64 $meta->superclasses(@_)
68 $meta->alias_method('has' => subname 'Moose::has' => sub {
69 my ($name, %options) = @_;
70 if (exists $options{is}) {
71 if ($options{is} eq 'ro') {
72 $options{reader} = $name;
74 elsif ($options{is} eq 'rw') {
75 $options{accessor} = $name;
78 if (exists $options{isa}) {
79 # allow for anon-subtypes here ...
80 if (blessed($options{isa}) && $options{isa}->isa('Moose::Meta::TypeConstraint')) {
81 $options{type_constraint} = $options{isa};
84 # otherwise assume it is a constraint
85 my $constraint = find_type_constraint($options{isa});
86 # if the constraing it not found ....
87 unless (defined $constraint) {
88 # assume it is a foreign class, and make
89 # an anon constraint for it
90 $constraint = subtype Object => where { $_->isa($options{isa}) };
92 $options{type_constraint} = $constraint;
95 $meta->add_attribute($name, %options)
98 # handle method modifers
99 $meta->alias_method('before' => subname 'Moose::before' => sub {
101 $meta->add_before_method_modifier($_, $code) for @_;
103 $meta->alias_method('after' => subname 'Moose::after' => sub {
105 $meta->add_after_method_modifier($_, $code) for @_;
107 $meta->alias_method('around' => subname 'Moose::around' => sub {
109 $meta->add_around_method_modifier($_, $code) for @_;
112 # make sure they inherit from Moose::Object
113 $meta->superclasses('Moose::Object')
114 unless $meta->superclasses();
116 # we recommend using these things
117 # so export them for them
118 $meta->alias_method('confess' => \&Carp::confess);
119 $meta->alias_method('blessed' => \&Scalar::Util::blessed);
130 Moose - Moose, it's the new Camel
137 has 'x' => (isa => 'Int', is => 'rw');
138 has 'y' => (isa => 'Int', is => 'rw');
151 has 'z' => (isa => 'Int');
153 after 'clear' => sub {
160 This is a B<very> early release of this module, it still needs
161 some fine tuning and B<lots> more documentation. I am adopting
162 the I<release early and release often> approach with this module,
163 so keep an eye on your favorite CPAN mirror!
167 Moose is an extension of the Perl 5 object system.
169 =head2 Another object system!?!?
171 Yes, I know there has been an explosion recently of new ways to
172 build object's in Perl 5, most of them based on inside-out objects,
173 and other such things. Moose is different because it is not a new
174 object system for Perl 5, but instead an extension of the existing
177 Moose is built on top of L<Class::MOP>, which is a metaclass system
178 for Perl 5. This means that Moose not only makes building normal
179 Perl 5 objects better, but it also provides the power of metaclass
182 =head2 What does Moose stand for??
184 Moose doesn't stand for one thing in particular, however, if you
185 want, here are a few of my favorites, feel free to contribute
190 =item Make Other Object Systems Envious
192 =item Makes Object Orientation So Easy
194 =item Makes Object Orientation Spiffy- Er (sorry ingy)
196 =item Most Other Object Systems Emasculate
198 =item My Overcraft Overfilled (with) Some Eels
200 =item Moose Often Ovulate Sorta Early
202 =item Many Overloaded Object Systems Exists
204 =item Moose Offers Often Super Extensions
208 =head1 ACKNOWLEDGEMENTS
212 =item I blame Sam Vilain for giving me my first hit of meta-model crack.
214 =item I blame Audrey Tang for encouraging that meta-crack habit in #perl6.
216 =item Without the love and encouragement of Yuval "nothingmuch" Kogman,
217 this module would not be possible (and it wouldn't have a name).
219 =item The basis of the TypeContraints module was Rob Kinyon's idea
220 originally, I just ran with it.
222 =item Much love to mst & chansen and the whole #moose poose for all the
223 ideas/feature-requests/encouragement
231 =item L<http://forum2.org/moose/>
237 All complex software has bugs lurking in it, and this module is no
238 exception. If you find a bug please either email me, or add the bug
243 Stevan Little E<lt>stevan@iinteractive.comE<gt>
245 =head1 COPYRIGHT AND LICENSE
247 Copyright 2006 by Infinity Interactive, Inc.
249 L<http://www.iinteractive.com>
251 This library is free software; you can redistribute it and/or modify
252 it under the same terms as Perl itself.