6 our $VERSION = '0.009001'; # 0.9.1
7 $VERSION = eval $VERSION;
15 return if $MAKERS{$target}; # already exported into this package
16 *{_getglob("${target}::extends")} = sub {
17 _load_module($_) for @_;
18 *{_getglob("${target}::ISA")} = \@_;
20 *{_getglob("${target}::with")} = sub {
22 die "Only one role supported at a time by with" if @_ > 1;
23 Moo::Role->apply_role_to_package($_[0], $target);
25 $MAKERS{$target} = {};
26 *{_getglob("${target}::has")} = sub {
27 my ($name, %spec) = @_;
28 ($MAKERS{$target}{accessor} ||= do {
29 require Method::Generate::Accessor;
30 Method::Generate::Accessor->new
31 })->generate_method($target, $name, \%spec);
32 $class->_constructor_maker_for($target)
33 ->register_attribute_specs($name, \%spec);
35 foreach my $type (qw(before after around)) {
36 *{_getglob "${target}::${type}"} = sub {
37 require Class::Method::Modifiers;
38 _install_modifier($target, $type, @_);
43 @{"${target}::ISA"} = do {
44 require Moo::Object; ('Moo::Object');
45 } unless @{"${target}::ISA"};
49 sub _constructor_maker_for {
50 my ($class, $target) = @_;
51 return unless $MAKERS{$target};
52 $MAKERS{$target}{constructor} ||= do {
53 require Method::Generate::Constructor;
54 Method::Generate::Constructor
57 accessor_generator => do {
58 require Method::Generate::Accessor;
59 Method::Generate::Accessor->new;
63 ->register_attribute_specs(do {
65 # using the -last- entry in @ISA means that classes created by
66 # Role::Tiny as N roles + superclass will still get the attributes
68 if (my $super = do { no strict 'refs'; ${"${target}::ISA"}[-1] }) {
69 if (my $con = $MAKERS{$super}{constructor}) {
70 @spec = %{$con->all_attribute_specs};
91 my $amount = shift || 1;
93 $self->pounds( $self->pounds - $amount );
103 die "Only SWEET-TREATZ supported!" unless $_[0] eq 'SWEET-TREATZ'
109 isa => quote_sub q{ die "$_[0] is too much cat food!" unless $_[0] < 15 },
116 my $full = Cat::Food->new(
117 taste => 'DELICIOUS.',
118 brand => 'SWEET-TREATZ',
128 This module is an extremely light-weight, high-performance L<Moose> replacement.
129 It also avoids depending on any XS modules to allow simple deployments. The
130 name C<Moo> is based on the idea that it provides almost -but not quite- two
133 Unlike C<Mouse> this module does not aim at full L<Moose> compatibility. See
134 L</INCOMPATIBILITIES> for more details.
136 =head1 IMPORTED METHODS
140 Foo::Bar->new( attr1 => 3 );
144 Foo::Bar->new({ attr1 => 3 });
148 Don't override (or probably even call) this method. Instead, you can define
149 a C<BUILD> method on your class and the constructor will automatically call the
150 C<BUILD> method from parent down to child after the object has been
151 instantiated. Typically this is used for object validation or possibly logging.
155 if ($foo->does('Some::Role1')) {
159 Returns true if the object composes in the passed role.
161 =head1 IMPORTED SUBROUTINES
165 extends 'Parent::Class';
174 Composes a L<Role::Tiny> into current class. Only one role may be composed in
175 at a time to allow the code to remain as simple as possible.
183 Declares an attribute for the class.
185 The options for C<has> are as follows:
191 B<required>, must be C<ro> or C<rw>. Unsurprisingly, C<ro> generates an
192 accessor that will not respond to arguments; to be clear: a setter only. C<rw>
193 will create a perlish getter/setter.
197 Takes a coderef which is meant to validate the attribute. Unlike L<Moose> Moo
198 does not include a basic type system, so instead of doing C<< isa => 'Num' >>,
202 die "$_[0] is not a number!" unless looks_like_number $_[0]
205 L<Sub::Quote aware|/SUB QUOTE AWARE>
209 Takes a coderef which is meant to coerce the attribute. The basic idea is to
210 do something like the following:
212 coerce => quote_sub q{
213 $_[0] + 1 unless $_[0] % 2
216 L<Sub::Quote aware|/SUB QUOTE AWARE>
220 Takes a coderef which will get called any time the attribute is set. Coderef
221 will be invoked against the object with the new value as an argument.
223 L<Sub::Quote aware|/SUB QUOTE AWARE>
227 Takes a coderef which will get called to populate an attribute.
229 L<Sub::Quote aware|/SUB QUOTE AWARE>
233 Takes a method name which will return true if an attribute has been set.
235 A common example of this would be to call it C<has_$foo>, implying that the
236 object has a C<$foo> set.
240 Takes a method name which will be called to create the attribute.
244 Takes a method name which will clear the attribute.
248 B<Boolean>. Set this if you want values for the attribute to be grabbed
249 lazily. This is usually a good idea if you have a L</builder> which requires
250 another attribute to be set.
254 B<Boolean>. Set this if the attribute must be passed on instantiation.
258 B<Boolean>. Set this if you want the reference that the attribute contains to
259 be weakened; use this when circular references are possible, which will cause
264 Takes the name of the key to look for at instantiation time of the object. A
265 common use of this is to make an underscored attribute have a non-underscored
266 initialization name. C<undef> means that passing the value in on instantiation
272 before foo => sub { ... };
274 See L<< Class::Method::Modifiers/before method(s) => sub { ... } >> for full
279 around foo => sub { ... };
281 See L<< Class::Method::Modifiers/around method(s) => sub { ... } >> for full
286 after foo => sub { ... };
288 See L<< Class::Method::Modifiers/after method(s) => sub { ... } >> for full
292 =head1 SUB QUOTE AWARE
294 L<Sub::Quote/quote_sub> allows us to create coderefs that are "inlineable,"
295 giving us a handy, XS-free speed boost. Any option that is L<Sub::Quote>
296 aware can take advantage of this.
298 =head1 INCOMPATIBILITIES
300 You can only compose one role at a time. If your application is large or
301 complex enough to warrant complex composition, you wanted L<Moose>.
303 There is no complex type system. C<isa> is verified with a coderef, if you
304 need complex types, just make a library of coderefs, or better yet, functions
305 that return quoted subs.
307 C<initializer> is not supported in core, but with an extension it is supported.
309 There is no meta object. If you need this level of complexity you wanted
312 No support for C<super>, C<override>, C<inner>, or C<augment>.
314 L</default> only supports coderefs, because doing otherwise is usually a
317 C<lazy_build> is not supported per se, but of course it will work if you
318 manually set all the options it implies.
320 C<auto_deref> is not supported.
322 C<documentation> is not supported.