Current File : C:/xampp/perl/vendor/lib/Moose/Meta/Role/Application/ToRole.pm
package Moose::Meta::Role::Application::ToRole;
our $VERSION = '2.2012';
use strict;
use warnings;
use metaclass;
use parent 'Moose::Meta::Role::Application';
use Moose::Util 'throw_exception';
sub apply {
my ($self, $role1, $role2) = @_;
$self->SUPER::apply($role1, $role2);
$role2->add_role($role1);
}
sub check_role_exclusions {
my ($self, $role1, $role2) = @_;
if ( $role2->excludes_role($role1->name) ) {
throw_exception( ConflictDetectedInCheckRoleExclusions => role_name => $role2->name,
excluded_role_name => $role1->name,
);
}
foreach my $excluded_role_name ($role1->get_excluded_roles_list) {
if ( $role2->does_role($excluded_role_name) ) {
throw_exception( RoleDoesTheExcludedRole => role_name => $role2->name,
excluded_role_name => $excluded_role_name,
second_role_name => $role1->name,
);
}
$role2->add_excluded_roles($excluded_role_name);
}
}
sub check_required_methods {
my ($self, $role1, $role2) = @_;
foreach my $required_method ($role1->get_required_method_list) {
my $required_method_name = $required_method->name;
next if $self->is_aliased_method($required_method_name);
$role2->add_required_methods($required_method)
unless $role2->find_method_by_name($required_method_name);
}
}
sub check_required_attributes {
}
sub apply_attributes {
my ($self, $role1, $role2) = @_;
foreach my $attribute_name ($role1->get_attribute_list) {
# it if it has one already
if ($role2->has_attribute($attribute_name) &&
# make sure we haven't seen this one already too
$role2->get_attribute($attribute_name) != $role1->get_attribute($attribute_name)) {
my $role2_name = $role2->name;
throw_exception( AttributeConflictInRoles => role_name => $role1->name,
second_role_name => $role2->name,
attribute_name => $attribute_name
);
}
else {
$role2->add_attribute(
$role1->get_attribute($attribute_name)->clone
);
}
}
}
sub apply_methods {
my ( $self, $role1, $role2 ) = @_;
foreach my $method ( $role1->_get_local_methods ) {
my $method_name = $method->name;
next if $method->isa('Class::MOP::Method::Meta');
unless ( $self->is_method_excluded($method_name) ) {
my $role2_method = $role2->get_method($method_name);
if ( $role2_method
&& $role2_method->body != $method->body ) {
# method conflicts between roles used to result in the method
# becoming a requirement but now are permitted just like
# for classes, hence no code in this branch anymore.
}
else {
$role2->add_method(
$method_name,
$method,
);
}
}
next unless $self->is_method_aliased($method_name);
my $aliased_method_name = $self->get_method_aliases->{$method_name};
my $role2_method = $role2->get_method($aliased_method_name);
if ( $role2_method
&& $role2_method->body != $method->body ) {
throw_exception( CannotCreateMethodAliasLocalMethodIsPresent => aliased_method_name => $aliased_method_name,
method => $method,
role_name => $role2->name,
role_being_applied_name => $role1->name,
);
}
$role2->add_method(
$aliased_method_name,
$role1->get_method($method_name)
);
if ( !$role2->has_method($method_name) ) {
$role2->add_required_methods($method_name)
unless $self->is_method_excluded($method_name);
}
}
}
sub apply_override_method_modifiers {
my ($self, $role1, $role2) = @_;
foreach my $method_name ($role1->get_method_modifier_list('override')) {
# it if it has one already then ...
if ($role2->has_method($method_name)) {
# if it is being composed into another role
# we have a conflict here, because you cannot
# combine an overridden method with a locally
# defined one
throw_exception( OverrideConflictInComposition => role_name => $role2->name,
role_being_applied_name => $role1->name,
method_name => $method_name
);
}
else {
# if we are a role, we need to make sure
# we don't have a conflict with the role
# we are composing into
if ($role2->has_override_method_modifier($method_name) &&
$role1->get_override_method_modifier($method_name) != $role2->get_override_method_modifier($method_name)) {
throw_exception( OverrideConflictInComposition => role_name => $role2->name,
role_being_applied_name => $role1->name,
method_name => $method_name,
two_overrides_found => 1
);
}
else {
# if there is no conflict,
# just add it to the role
$role2->add_override_method_modifier(
$method_name,
$role1->get_override_method_modifier($method_name)
);
}
}
}
}
sub apply_method_modifiers {
my ($self, $modifier_type, $role1, $role2) = @_;
my $add = "add_${modifier_type}_method_modifier";
my $get = "get_${modifier_type}_method_modifiers";
foreach my $method_name ($role1->get_method_modifier_list($modifier_type)) {
$role2->$add(
$method_name,
$_
) foreach $role1->$get($method_name);
}
}
1;
# ABSTRACT: Compose a role into another role
__END__
=pod
=encoding UTF-8
=head1 NAME
Moose::Meta::Role::Application::ToRole - Compose a role into another role
=head1 VERSION
version 2.2012
=head1 DESCRIPTION
=head2 METHODS
=over 4
=item B<new>
=item B<meta>
=item B<apply>
=item B<check_role_exclusions>
=item B<check_required_methods>
=item B<check_required_attributes>
=item B<apply_attributes>
=item B<apply_methods>
=item B<apply_method_modifiers>
=item B<apply_override_method_modifiers>
=back
=head1 BUGS
See L<Moose/BUGS> for details on reporting bugs.
=head1 AUTHORS
=over 4
=item *
Stevan Little <stevan.little@iinteractive.com>
=item *
Dave Rolsky <autarch@urth.org>
=item *
Jesse Luehrs <doy@tozt.net>
=item *
Shawn M Moore <code@sartak.org>
=item *
יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
=item *
Karen Etheridge <ether@cpan.org>
=item *
Florian Ragwitz <rafl@debian.org>
=item *
Hans Dieter Pearcey <hdp@weftsoar.net>
=item *
Chris Prather <chris@prather.org>
=item *
Matt S Trout <mst@shadowcat.co.uk>
=back
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2006 by Infinity Interactive, Inc.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
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