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package MooseX::NonMoose::Meta::Role::Class;
use Moose::Role;
=head1 NAME
MooseX::NonMoose::Meta::Role::Class - metaclass trait for L<MooseX::NonMoose>
=head1 SYNOPSIS
package Foo;
use Moose -traits => 'MooseX::NonMoose::Meta::Role::Class';
# or
package My::Moose;
use Moose ();
use Moose::Exporter;
Moose::Exporter->setup_import_methods;
sub init_meta {
shift;
my %options = @_;
Moose->init_meta(%options);
Moose::Util::MetaRole::apply_metaclass_roles(
for_class => $options{for_class},
metaclass_roles => ['MooseX::NonMoose::Meta::Role::Class'],
);
return Class::MOP::class_of($options{for_class});
}
=head1 DESCRIPTION
This trait implements everything involved with extending non-Moose classes,
other than doing the actual inlining at C<make_immutable> time. See
L<MooseX::NonMoose> for more details.
=cut
has has_nonmoose_constructor => (
is => 'rw',
isa => 'Bool',
default => 0,
);
around _immutable_options => sub {
my $orig = shift;
my $self = shift;
my @options = $self->$orig(@_);
# do nothing if extends was never called
return @options if !$self->has_nonmoose_constructor;
# if we're using just the metaclass trait, but not the constructor trait,
# then suppress the warning about not inlining a constructor
my $cc_meta = Class::MOP::class_of($self->constructor_class);
return (@options, inline_constructor => 0)
unless $cc_meta->can('does_role')
&& $cc_meta->does_role('MooseX::NonMoose::Meta::Role::Constructor');
# do nothing if extends was called, but we then added a method modifier to
# the constructor (this will warn, but that's okay)
# XXX: this is a fairly big hack, but it should cover most of the cases
# that actually show up in practice... it would be nice to do this properly
# though
# XXX: get constructor name from the constructor metaclass?
return @options
if $self->get_method('new')->isa('Class::MOP::Method::Wrapped');
# do nothing if we explicitly ask for the constructor to not be inlined
my %options = @options;
return @options if !$options{inline_constructor};
# otherwise, explicitly ask for the constructor to be replaced (to suppress
# the warning message), since this is the expected usage, and shouldn't
# cause a warning
return (replace_constructor => 1, @options);
};
around superclasses => sub {
my $orig = shift;
my $self = shift;
return $self->$orig unless @_;
my @superclasses = @_;
push @superclasses, 'Moose::Object'
unless grep { $_->isa('Moose::Object') } @superclasses;
my @ret = $self->$orig(@superclasses);
# we need to get the non-moose constructor from the superclass
# of the class where this method actually exists, regardless of what class
# we're calling it on
# XXX: get constructor name from the constructor metaclass?
my $super_new = $self->find_next_method_by_name('new');
# if we're trying to extend a (non-immutable) moose class, just do nothing
return @ret if $super_new->package_name eq 'Moose::Object';
if ($super_new->associated_metaclass->can('constructor_class')) {
my $constructor_class_meta = Class::MOP::Class->initialize(
$super_new->associated_metaclass->constructor_class
);
# if the constructor we're inheriting is already one of ours, there's
# no reason to install a new one
return @ret if $constructor_class_meta->can('does_role')
&& $constructor_class_meta->does_role('MooseX::NonMoose::Meta::Role::Constructor');
# if the constructor we're inheriting is an inlined version of the
# default moose constructor, don't do anything either
# XXX: wrong if the class overrode new manually?
return @ret if $constructor_class_meta->name eq 'Moose::Meta::Method::Constructor';
}
$self->add_method(new => sub {
my $class = shift;
my $params = $class->BUILDARGS(@_);
my $instance = $super_new->execute($class, @_);
my $self = Class::MOP::Class->initialize($class)->new_object(
__INSTANCE__ => $instance,
%$params,
);
$self->BUILDALL($params);
return $self;
});
$self->has_nonmoose_constructor(1);
return @ret;
};
no Moose::Role;
=head1 AUTHOR
Jesse Luehrs <doy at tozt dot net>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2009 by Jesse Luehrs.
This is free software; you can redistribute it and/or modify it under
the same terms as perl itself.
=cut
1;
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