use strict;
use warnings;
-use Carp 'confess';
+use Carp 'confess';
+use Scalar::Util 'weaken', 'blessed';
-our $VERSION = '0.02';
+our $VERSION = '0.04';
use base 'Class::MOP::Class';
+__PACKAGE__->meta->add_attribute('@:roles' => (
+ reader => 'roles',
+ default => sub { [] }
+));
+
+sub add_role {
+ my ($self, $role) = @_;
+ (blessed($role) && $role->isa('Moose::Meta::Role'))
+ || confess "Roles must be instances of Moose::Meta::Role";
+ push @{$self->roles} => $role;
+}
+
+sub does_role {
+ my ($self, $role_name) = @_;
+ (defined $role_name)
+ || confess "You must supply a role name to look for";
+ foreach my $role (@{$self->roles}) {
+ return 1 if $role->name eq $role_name;
+ }
+ return 0;
+}
+
sub construct_instance {
my ($class, %params) = @_;
my $instance = $params{'__INSTANCE__'} || {};
my $init_arg = $attr->init_arg();
# try to fetch the init arg from the %params ...
my $val;
- $val = $params{$init_arg} if exists $params{$init_arg};
+ if (exists $params{$init_arg}) {
+ $val = $params{$init_arg};
+ }
+ else {
+ # skip it if it's lazy
+ next if $attr->is_lazy;
+ # and die if it is required
+ confess "Attribute (" . $attr->name . ") is required"
+ if $attr->is_required
+ }
# if nothing was in the %params, we can use the
# attribute's default value (if it has one)
- $val ||= $attr->default($instance) if $attr->has_default;
+ if (!defined $val && $attr->has_default) {
+ $val = $attr->default($instance);
+ }
if (defined $val) {
if ($attr->has_type_constraint) {
- if ($attr->has_coercion && $attr->type_constraint->has_coercion) {
- $val = $attr->type_constraint->coercion_code->($val);
+ if ($attr->should_coerce && $attr->type_constraint->has_coercion) {
+ $val = $attr->type_constraint->coercion->coerce($val);
}
- (defined($attr->type_constraint->constraint_code->($val)))
- || confess "Attribute (" . $attr->name . ") does not pass the type contraint with";
+ (defined($attr->type_constraint->check($val)))
+ || confess "Attribute (" . $attr->name . ") does not pass the type contraint with '$val'";
}
}
$instance->{$attr->name} = $val;
+ if (defined $val && $attr->is_weak_ref) {
+ weaken($instance->{$attr->name});
+ }
}
return $instance;
}
+sub has_method {
+ my ($self, $method_name) = @_;
+ (defined $method_name && $method_name)
+ || confess "You must define a method name";
+
+ my $sub_name = ($self->name . '::' . $method_name);
+
+ no strict 'refs';
+ return 0 if !defined(&{$sub_name});
+ my $method = \&{$sub_name};
+
+ return 1 if blessed($method) && $method->isa('Moose::Meta::Role::Method');
+ return $self->SUPER::has_method($method_name);
+}
+
+
+sub add_override_method_modifier {
+ my ($self, $name, $method, $_super_package) = @_;
+ # need this for roles ...
+ $_super_package ||= $self->name;
+ my $super = $self->find_next_method_by_name($name);
+ (defined $super)
+ || confess "You cannot override '$name' because it has no super method";
+ $self->add_method($name => bless sub {
+ my @args = @_;
+ no strict 'refs';
+ no warnings 'redefine';
+ local *{$_super_package . '::super'} = sub { $super->(@args) };
+ return $method->(@args);
+ } => 'Moose::Meta::Method::Overriden');
+}
+
+sub add_augment_method_modifier {
+ my ($self, $name, $method) = @_;
+ my $super = $self->find_next_method_by_name($name);
+ (defined $super)
+ || confess "You cannot augment '$name' because it has no super method";
+ my $_super_package = $super->package_name;
+ # BUT!,... if this is an overriden method ....
+ if ($super->isa('Moose::Meta::Method::Overriden')) {
+ # we need to be sure that we actually
+ # find the next method, which is not
+ # an 'override' method, the reason is
+ # that an 'override' method will not
+ # be the one calling inner()
+ my $real_super = $self->_find_next_method_by_name_which_is_not_overridden($name);
+ $_super_package = $real_super->package_name;
+ }
+ $self->add_method($name => sub {
+ my @args = @_;
+ no strict 'refs';
+ no warnings 'redefine';
+ local *{$_super_package . '::inner'} = sub { $method->(@args) };
+ return $super->(@args);
+ });
+}
+
+sub _find_next_method_by_name_which_is_not_overridden {
+ my ($self, $name) = @_;
+ my @methods = $self->find_all_methods_by_name($name);
+ foreach my $method (@methods) {
+ return $method->{code}
+ if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overriden');
+ }
+ return undef;
+}
+
+package Moose::Meta::Method::Overriden;
+
+use strict;
+use warnings;
+
+our $VERSION = '0.01';
+
+use base 'Class::MOP::Method';
+
1;
__END__
Moose::Meta::Class - The Moose metaclass
-=head1 SYNOPSIS
-
=head1 DESCRIPTION
This is a subclass of L<Class::MOP::Class> with Moose specific
extensions.
+For the most part, the only time you will ever encounter an
+instance of this class is if you are doing some serious deep
+introspection. To really understand this class, you need to refer
+to the L<Class::MOP::Class> documentation.
+
=head1 METHODS
=over 4
=item B<construct_instance>
-=item B<mixed_in>
+This provides some Moose specific extensions to this method, you
+almost never call this method directly unless you really know what
+you are doing.
+
+This method makes sure to handle the moose weak-ref, type-constraint
+and type coercion features.
+
+=item B<has_method ($name)>
+
+This accomidates Moose::Meta::Role::Method instances, which are
+aliased, instead of added, but still need to be counted as valid
+methods.
+
+=item B<add_override_method_modifier ($name, $method)>
+
+=item B<add_augment_method_modifier ($name, $method)>
+
+=item B<roles>
+
+=item B<add_role ($role)>
+
+=item B<does_role ($role_name)>
=back
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