use strict;
use warnings;
+use 5.008;
+
our $VERSION = '0.56';
+$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use Scalar::Util 'blessed';
use Moose::Exporter;
-use Class::MOP 0.64;
+use Class::MOP 0.65;
use Moose::Meta::Class;
use Moose::Meta::TypeConstraint;
use Moose::Meta::Attribute;
use Moose::Meta::Instance;
+use Moose::Object;
+
use Moose::Meta::Role;
+use Moose::Meta::Role::Composite;
+use Moose::Meta::Role::Application;
+use Moose::Meta::Role::Application::RoleSummation;
+use Moose::Meta::Role::Application::ToClass;
+use Moose::Meta::Role::Application::ToRole;
+use Moose::Meta::Role::Application::ToInstance;
-use Moose::Object;
use Moose::Util::TypeConstraints;
use Moose::Util ();
# this checks the metaclass to make sure
# it is correct, sometimes it can get out
# of sync when the classes are being built
- my $meta = $class->meta->_fix_metaclass_incompatability(@supers);
+ my $meta = Moose::Meta::Class->initialize($class)->_fix_metaclass_incompatability(@supers);
$meta->superclasses(@supers);
}
sub with {
my $class = shift;
- Moose::Util::apply_all_roles($class->meta, @_);
+ Moose::Util::apply_all_roles(Class::MOP::Class->initialize($class), @_);
}
sub has {
croak 'Usage: has \'name\' => ( key => value, ... )' if @_ == 1;
my %options = @_;
my $attrs = ( ref($name) eq 'ARRAY' ) ? $name : [ ($name) ];
- $class->meta->add_attribute( $_, %options ) for @$attrs;
+ Class::MOP::Class->initialize($class)->add_attribute( $_, %options ) for @$attrs;
}
sub before {
sub override {
my $class = shift;
my ( $name, $method ) = @_;
- $class->meta->add_override_method_modifier( $name => $method );
+ Class::MOP::Class->initialize($class)->add_override_method_modifier( $name => $method );
}
sub inner {
sub augment {
my $class = shift;
my ( $name, $method ) = @_;
- $class->meta->add_augment_method_modifier( $name => $method );
+ Class::MOP::Class->initialize($class)->add_augment_method_modifier( $name => $method );
}
sub make_immutable {
my $class = shift;
cluck "The make_immutable keyword has been deprecated, " .
"please go back to __PACKAGE__->meta->make_immutable\n";
- $class->meta->make_immutable(@_);
+ Class::MOP::Class->initialize($class)->make_immutable(@_);
}
-my $exporter = Moose::Exporter->build_exporter(
+Moose::Exporter->setup_import_methods(
with_caller => [
qw( extends with has before after around override augment make_immutable )
],
],
);
-sub import {
- my $caller = Moose::Exporter->get_caller(@_);
-
- # this works because both pragmas set $^H (see perldoc perlvar)
- # which affects the current compilation - i.e. the file who use'd
- # us - which is why we don't need to do anything special to make
- # it affect that file rather than this one (which is already compiled)
-
- strict->import;
- warnings->import;
-
- # we should never export to main
- if ($caller eq 'main') {
- warn qq{Moose does not export its sugar to the 'main' package.\n};
- return;
+sub init_meta {
+ # This used to be called as a function. This hack preserves
+ # backwards compatibility.
+ if ( $_[0] ne __PACKAGE__ ) {
+ return __PACKAGE__->init_meta(
+ for_class => $_[0],
+ base_class => $_[1],
+ metaclass => $_[2],
+ );
}
- init_meta($caller, 'Moose::Object');
-
- goto $exporter;
-}
-
-# NOTE:
-# This is for special use by
-# some modules and stuff, I
-# dont know if it is sane enough
-# to document actually.
-# - SL
-sub __CURRY_EXPORTS_FOR_CLASS__ {
- my $caller = shift;
- ($caller ne 'Moose')
- || croak "_import_into must be called a function, not a method";
- ($caller->can('meta') && $caller->meta->isa('Class::MOP::Class'))
- || croak "Cannot call _import_into on a package ($caller) without a metaclass";
-# return map { $_ => $exports{$_}->() } (@_ ? @_ : keys %exports);
-}
-
-sub unimport {
- my $caller = Moose::Exporter->get_caller(@_);
-
- Moose::Exporter->remove_keywords(
- source => __PACKAGE__,
- from => $caller,
- );
-}
+ shift;
+ my %args = @_;
-sub init_meta {
- my ( $class, $base_class, $metaclass ) = @_;
- $base_class = 'Moose::Object' unless defined $base_class;
- $metaclass = 'Moose::Meta::Class' unless defined $metaclass;
+ my $class = $args{for_class}
+ or confess "Cannot call init_meta without specifying a for_class";
+ my $base_class = $args{base_class} || 'Moose::Object';
+ my $metaclass = $args{metaclass} || 'Moose::Meta::Class';
confess
"The Metaclass $metaclass must be a subclass of Moose::Meta::Class."
unless find_type_constraint($class);
my $meta;
+
+ if ( $meta = Class::MOP::get_metaclass_by_name($class) ) {
+ unless ( $meta->isa("Moose::Meta::Class") ) {
+ confess "$class already has a metaclass, but it does not inherit $metaclass ($meta)";
+ }
+ } else {
+ # no metaclass, no 'meta' method
+
+ # now we check whether our ancestors have metaclass, and if so borrow that
+ my ( undef, @isa ) = @{ $class->mro::get_linear_isa };
+
+ foreach my $ancestor ( @isa ) {
+ my $ancestor_meta = Class::MOP::get_metaclass_by_name($ancestor) || next;
+
+ my $ancestor_meta_class = ($ancestor_meta->is_immutable
+ ? $ancestor_meta->get_mutable_metaclass_name
+ : ref($ancestor_meta));
+
+ # if we have an ancestor metaclass that inherits $metaclass, we use
+ # that. This is like _fix_metaclass_incompatability, but we can do it now.
+
+ # the case of having an ancestry is not very common, but arises in
+ # e.g. Reaction
+ unless ( $metaclass->isa( $ancestor_meta_class ) ) {
+ if ( $ancestor_meta_class->isa($metaclass) ) {
+ $metaclass = $ancestor_meta_class;
+ }
+ }
+ }
+
+ $meta = $metaclass->initialize($class);
+ }
+
if ( $class->can('meta') ) {
+ # check 'meta' method
+
+ # it may be inherited
+
# NOTE:
# this is the case where the metaclass pragma
# was used before the 'use Moose' statement to
# override a specific class
- $meta = $class->meta();
- ( blessed($meta) && $meta->isa('Moose::Meta::Class') )
- || confess "You already have a &meta function, but it does not return a Moose::Meta::Class";
+ my $method_meta = $class->meta;
+
+ ( blessed($method_meta) && $method_meta->isa('Moose::Meta::Class') )
+ || confess "$class already has a &meta function, but it does not return a Moose::Meta::Class ($meta)";
+
+ $meta = $method_meta;
}
- else {
- # NOTE:
- # this is broken currently, we actually need
- # to allow the possiblity of an inherited
- # meta, which will not be visible until the
- # user 'extends' first. This needs to have
- # more intelligence to it
- $meta = $metaclass->initialize($class);
+
+ unless ( $meta->has_method("meta") ) { # don't overwrite
+ # also check for inherited non moose 'meta' method?
+ # FIXME also skip this if the user requested by passing an option
$meta->add_method(
'meta' => sub {
# re-initialize so it inherits properly
- $metaclass->initialize( blessed( $_[0] ) || $_[0] );
+ $metaclass->initialize( ref($_[0]) || $_[0] );
}
);
}
return $meta;
}
+# This may be used in some older MooseX extensions.
+sub _get_caller {
+ goto &Moose::Exporter::_get_caller;
+}
+
## make 'em all immutable
$_->meta->make_immutable(
- inline_constructor => 0,
+ inline_constructor => 1,
+ constructor_name => "_new",
inline_accessors => 1, # these are Class::MOP accessors, so they need inlining
)
- for (
- 'Moose::Meta::Attribute',
- 'Moose::Meta::Class',
- 'Moose::Meta::Instance',
-
- 'Moose::Meta::TypeConstraint',
- 'Moose::Meta::TypeConstraint::Union',
- 'Moose::Meta::TypeConstraint::Parameterized',
- 'Moose::Meta::TypeCoercion',
-
- 'Moose::Meta::Method',
- 'Moose::Meta::Method::Accessor',
- 'Moose::Meta::Method::Constructor',
- 'Moose::Meta::Method::Destructor',
- 'Moose::Meta::Method::Overriden',
-
- 'Moose::Meta::Role',
- 'Moose::Meta::Role::Method',
- 'Moose::Meta::Role::Method::Required',
- );
+ for (qw(
+ Moose::Meta::Attribute
+ Moose::Meta::Class
+ Moose::Meta::Instance
+
+ Moose::Meta::TypeConstraint
+ Moose::Meta::TypeConstraint::Union
+ Moose::Meta::TypeConstraint::Parameterized
+ Moose::Meta::TypeConstraint::Parameterizable
+ Moose::Meta::TypeConstraint::Enum
+ Moose::Meta::TypeConstraint::Class
+ Moose::Meta::TypeConstraint::Role
+ Moose::Meta::TypeConstraint::Registry
+ Moose::Meta::TypeCoercion
+ Moose::Meta::TypeCoercion::Union
+
+ Moose::Meta::Method
+ Moose::Meta::Method::Accessor
+ Moose::Meta::Method::Constructor
+ Moose::Meta::Method::Destructor
+ Moose::Meta::Method::Overriden
+ Moose::Meta::Method::Augmented
+
+ Moose::Meta::Role
+ Moose::Meta::Role::Method
+ Moose::Meta::Role::Method::Required
+
+ Moose::Meta::Role::Composite
+
+ Moose::Meta::Role::Application
+ Moose::Meta::Role::Application::RoleSummation
+ Moose::Meta::Role::Application::ToClass
+ Moose::Meta::Role::Application::ToRole
+ Moose::Meta::Role::Application::ToInstance
+));
1;
building normal Perl 5 objects better, but it provides the power of
metaclass programming as well.
+=head2 New to Moose?
+
+If you're new to Moose, the best place to start is the
+L<Moose::Cookbook>. The recipes on Moose basics will get you up to
+speed with many of Moose's features quickly. Once you have an idea of
+what Moose can do, you can use the API documentation to get more
+detail on features which interest you.
+
=head2 Moose Extensions
The C<MooseX::> namespace is the official place to find Moose extensions.
This tells Moose to take the list of C<@role_names> and apply them to the
attribute meta-object. This is very similar to the I<metaclass> option, but
-allows you to use more than one extension at a time. This too is an advanced
-topic, we don't yet have a cookbook for it though.
+allows you to use more than one extension at a time.
-As with I<metaclass>, the default behavior is to just load C<$role_name>; however,
-we also have a way to alias to a shorter name. This will first look to see if
-B<Moose::Meta::Attribute::Custom::Trait::$role_name> exists. If it does, Moose
-will then check to see if that has the method C<register_implementation>, which
-should return the actual name of the custom attribute trait. If there is no
-C<register_implementation> method, it will fall back to using
-B<Moose::Meta::Attribute::Custom::Trait::$metaclass_name> as the trait name.
+See L<TRAIT NAME RESOLUTION> for details on how a trait name is
+resolved to a class name.
+
+Also see L<Moose::Cookbook::Meta::Recipe3> for a metaclass trait
+example.
=back
=back
+=head1 METACLASS TRAITS
+
+When you use Moose, you can also specify traits which will be applied
+to your metaclass:
+
+ use Moose -traits => 'My::Trait';
+
+This is very similar to the attribute traits feature. When you do
+this, your class's C<meta> object will have the specified traits
+applied to it. See L<TRAIT NAME RESOLUTION> for more details.
+
+=head1 TRAIT NAME RESOLUTION
+
+By default, when given a trait name, Moose simply tries to load a
+class of the same name. If such a class does not exist, it then looks
+for for a class matching
+B<Moose::Meta::$type::Custom::Trait::$trait_name>. The C<$type>
+variable here will be one of B<Attribute> or B<Class>, depending on
+what the trait is being applied to.
+
+If a class with this long name exists, Moose checks to see if it has
+the method C<register_implementation>. This method is expected to
+return the I<real> class name of the trait. If there is no
+C<register_implementation> method, it will fall back to using
+B<Moose::Meta::$type::Custom::Trait::$trait> as the trait name.
+
+If all this is confusing, take a look at
+L<Moose::Cookbook::Meta::Recipe3>, which demonstrates how to create an
+attribute trait.
+
=head1 UNIMPORTING FUNCTIONS
=head2 B<unimport>
=head1 EXTENDING AND EMBEDDING MOOSE
-Moose also offers some options for extending or embedding it into your own
-framework. The basic premise is to have something that sets up your class'
-metaclass and export the moose declarators (C<has>, C<with>, C<extends>,...).
-Here is an example:
+Moose also offers some options for extending or embedding it into your
+own framework. There are several things you might want to do as part
+of such a framework. First, you probably want to export Moose's sugar
+functions (C<has>, C<extends>, etc) for users of the
+framework. Second, you may want to provide additional sugar of your
+own. Third, you may want to provide your own object base class instead
+of L<Moose::Object>, and/or your own metaclass class instead of
+L<Moose::Meta::Class>.
- package MyFramework;
- use Moose;
+The exporting needs can be asily satisfied by using
+L<Moose::Exporter>, which is what C<Moose.pm> itself uses for
+exporting. L<Moose::Exporter> lets you "export like Moose".
- sub import {
- my $CALLER = caller();
+If you define an C<init_meta> method in a module that uses
+L<Moose::Exporter>, then this method will be called I<before>
+C<Moose.pm>'s own C<init_meta>. This gives you a chance to provide an
+alternate object base class or metaclass class.
- strict->import;
- warnings->import;
+Here is a simple example:
- # we should never export to main
- return if $CALLER eq 'main';
- Moose::init_meta( $CALLER, 'MyFramework::Base' );
- Moose->import({into => $CALLER});
+ package MyFramework;
+
+ use strict;
+ use warnings;
- # Do my custom framework stuff
+ use Moose (); # no need to get Moose's exports
+ use Moose::Exporter;
- return 1;
+ Moose::Exporter->setup_import_methods( also => 'Moose' );
+
+ sub init_meta {
+ shift;
+ return Moose->init_meta( @_, base_class => 'MyFramework::Base' );
}
-=head2 B<import>
+In this example, any class that includes C<use MyFramework> will get
+all of C<Moose.pm>'s sugar functions, and will have their superclass
+set to C<MyFramework::Base>.
-Moose's C<import> method supports the L<Sub::Exporter> form of C<{into =E<gt> $pkg}>
-and C<{into_level =E<gt> 1}>
+Additionally, that class can include C<no MyFramework> to unimport
+
+=head2 B<< Moose->init_meta(for_class => $class, base_class => $baseclass, metaclass => $metaclass) >>
-=head2 B<init_meta ($class, $baseclass, $metaclass)>
+The C<init_meta> method sets up the metaclass object for the class
+specified by C<for_class>. This method injects a a C<meta> accessor
+into the class so you can get at this object. It also sets the class's
+superclass to C<base_class>, with L<Moose::Object> as the default.
-Moose does some boot strapping: it creates a metaclass object for your class,
-and then injects a C<meta> accessor into your class to retrieve it. Then it
-sets your baseclass to Moose::Object or the value you pass in unless you already
-have one. This is all done via C<init_meta> which takes the name of your class
-and optionally a baseclass and a metaclass as arguments.
+You can specify an alternate metaclass with the C<metaclass> parameter.
For more detail on this topic, see L<Moose::Cookbook::Extending::Recipe2>.
+This method used to be documented as a function which accepted
+positional parameters. This calling style will still work for
+backwards compatibility, but is deprecated.
+
+=head2 B<import>
+
+Moose's C<import> method supports the L<Sub::Exporter> form of C<{into =E<gt> $pkg}>
+and C<{into_level =E<gt> 1}>.
+
+B<NOTE>: Doing this is more or less deprecated. Use L<Moose::Exporter>
+instead, which lets you stack multiple C<Moose.pm>-alike modules
+sanely. It handles getting the exported functions into the right place
+for you.
+
=head1 CAVEATS
=over 4
projects / gitmo/Moose.git / blobdiff