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#!/usr/bin/perl
package MooseX::Clone::Meta::Attribute::Trait::NoClone;
use Moose::Role;
use namespace::clean -except => [qw(meta)];
with qw(MooseX::Clone::Meta::Attribute::Trait::Clone::Base);
sub Moose::Meta::Attribute::Custom::Trait::NoClone::register_implementation { __PACKAGE__ }
sub clone_value {
my ( $self, $target, $proto, %args ) = @_;
# FIXME default cloning behavior works like this
#if ( exists $args{init_arg} ) {
# $self->set_value($args{init_arg});
#} else {
# but i think this is more correct
$self->clear_value($target);
$self->initialize_instance_slot(
$self->meta->get_meta_instance,
$target,
{ exists $args{init_arg} ? ( $self->init_arg => $args{init_arg} ) : () },
);
}
__PACKAGE__
__END__
=pod
=head1 NAME
MooseX::Clone::Meta::Attribute::Trait::NoClone - A trait for attrs that should
not be copied while cloning.
=head1 SYNOPSIS
with qw(MooseX::Clone);
has _some_special_thingy => (
traits => [qw(NoClone)],
);
=head1 DESCRIPTION
Sometimes certain values should not be carried over when cloning an object.
This attribute trait implements just that.
=head1 METHODS
=over 4
=item clone_value
If the C<init_arg> param is set (that means an explicit value was given to
C<clone>) sets the attribute to that value.
Otherwise calls C<clear_value> and C<initialize_instance_slot>.
=back
=cut
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