use warnings;
use Mouse::Util qw(not_supported english_list);
+use Mouse::Meta::Module;
+
use base qw(Mouse::Meta::Module);
sub method_metaclass(){ 'Mouse::Meta::Role::Method' } # required for get_method()
-sub _new {
+sub _construct_meta {
my $class = shift;
+
my %args = @_;
$args{methods} ||= {};
$args{required_methods} ||= [];
$args{roles} ||= [];
- bless \%args, $class;
+# return Mouse::Meta::Class->initialize($class)->new_object(%args)
+# if $class ne __PACKAGE__;
+
+ return bless \%args, ref($class) || $class;
+}
+
+sub create_anon_role{
+ my $self = shift;
+ return $self->create(undef, @_);
+}
+
+sub is_anon_role{
+ return exists $_[0]->{anon_serial_id};
}
sub get_roles { $_[0]->{roles} }
}
sub add_required_methods {
- my $self = shift;
- my @methods = @_;
+ my($self, @methods) = @_;
push @{$self->{required_methods}}, @methods;
}
$self->{attributes}->{$name} = (@_ == 1) ? $_[0] : { @_ };
}
+sub _canonicalize_apply_args{
+ my($self, $applicant, %args) = @_;
+
+ if($applicant->isa('Mouse::Meta::Class')){
+ $args{_to} = 'class';
+ }
+ elsif($applicant->isa('Mouse::Meta::Role')){
+ $args{_to} = 'role';
+ }
+ else{
+ $args{_to} = 'instance';
+
+ not_supported 'Application::ToInstance';
+ }
+
+ if($args{alias} && !exists $args{-alias}){
+ $args{-alias} = $args{alias};
+ }
+ if($args{excludes} && !exists $args{-excludes}){
+ $args{-excludes} = $args{excludes};
+ }
+
+ if(my $excludes = $args{-excludes}){
+ $args{-excludes} = {}; # replace with a hash ref
+ if(ref $excludes){
+ %{$args{-excludes}} = (map{ $_ => undef } @{$excludes});
+ }
+ else{
+ $args{-excludes}{$excludes} = undef;
+ }
+ }
+
+ return \%args;
+}
+
sub _check_required_methods{
my($role, $class, $args, @other_roles) = @_;
- if($class->isa('Mouse::Meta::Class')){
+ if($args->{_to} eq 'class'){
my $class_name = $class->name;
+ my $role_name = $role->name;
+ my @missing;
foreach my $method_name(@{$role->{required_methods}}){
- unless($class_name->can($method_name)){
- my $role_name = $role->name;
+ if(!$class_name->can($method_name)){
my $has_method = 0;
foreach my $another_role_spec(@other_roles){
last;
}
}
-
- $role->throw_error("'$role_name' requires the method '$method_name' to be implemented by '$class_name'")
- unless $has_method;
+
+ push @missing, $method_name if !$has_method;
}
}
+ if(@missing){
+ $class->throw_error("'$role_name' requires the "
+ . (@missing == 1 ? 'method' : 'methods')
+ . " "
+ . english_list(map{ sprintf q{'%s'}, $_ } @missing)
+ . " to be implemented by '$class_name'");
+ }
+ }
+ elsif($args->{_to} eq 'role'){
+ # apply role($role) to role($class)
+ foreach my $method_name($role->get_required_method_list){
+ next if $class->has_method($method_name); # already has it
+ $class->add_required_methods($method_name);
+ }
}
return;
my $role_name = $role->name;
my $class_name = $class->name;
- my $alias = (exists $args->{alias} && !exists $args->{-alias}) ? $args->{alias} : $args->{-alias};
- my $excludes = (exists $args->{excludes} && !exists $args->{-excludes}) ? $args->{excludes} : $args->{-excludes};
-
- my %exclude_map;
-
- if(defined $excludes){
- if(ref $excludes){
- %exclude_map = map{ $_ => undef } @{$excludes};
- }
- else{
- $exclude_map{$excludes} = undef;
- }
- }
+ my $alias = $args->{-alias};
+ my $excludes = $args->{-excludes};
foreach my $method_name($role->get_method_list){
next if $method_name eq 'meta';
my $code = $role_name->can($method_name);
- if(!exists $exclude_map{$method_name}){
+ if(!exists $excludes->{$method_name}){
if(!$class->has_method($method_name)){
$class->add_method($method_name => $code);
}
if($alias && $alias->{$method_name}){
my $dstname = $alias->{$method_name};
- my $slot = do{ no strict 'refs'; \*{$class_name . '::' . $dstname} };
- if(defined(*{$slot}{CODE}) && *{$slot}{CODE} != $code){
+ my $dstcode = do{ no strict 'refs'; *{$class_name . '::' . $dstname}{CODE} };
+
+ if(defined($dstcode) && $dstcode != $code){
$class->throw_error("Cannot create a method alias if a local method of the same name exists");
}
else{
sub _apply_attributes{
my($role, $class, $args) = @_;
- if ($class->isa('Mouse::Meta::Class')) {
+ if ($args->{_to} eq 'class') {
# apply role to class
for my $attr_name ($role->get_attribute_list) {
next if $class->has_attribute($attr_name);
my $spec = $role->get_attribute($attr_name);
- my $attr_metaclass = 'Mouse::Meta::Attribute';
- if ( my $metaclass_name = $spec->{metaclass} ) {
- $attr_metaclass = Mouse::Util::resolve_metaclass_alias(
- 'Attribute',
- $metaclass_name
- );
- }
-
- $attr_metaclass->create($class, $attr_name => %$spec);
+ $class->add_attribute($attr_name => %{$spec});
}
- } else {
+ }
+ elsif($args->{_to} eq 'role'){
# apply role to role
for my $attr_name ($role->get_attribute_list) {
next if $class->has_attribute($attr_name);
sub _apply_modifiers{
my($role, $class, $args) = @_;
- for my $modifier_type (qw/before after around override/) {
+ for my $modifier_type (qw/override before around after/) {
my $add_modifier = "add_${modifier_type}_method_modifier";
my $modifiers = $role->{"${modifier_type}_method_modifiers"};
sub _append_roles{
my($role, $class, $args) = @_;
- my $roles = $class->isa('Mouse::Meta::Class') ? $class->roles : $class->get_roles;
+ my $roles = ($args->{_to} eq 'class') ? $class->roles : $class->get_roles;
foreach my $r($role, @{$role->get_roles}){
if(!$class->does_role($r->name)){
# Moose uses Application::ToInstance, Application::ToClass, Application::ToRole
sub apply {
- my($self, $class, %args) = @_;
+ my $self = shift;
+ my $applicant = shift;
- if ($class->isa('Mouse::Object')) {
- not_supported 'Application::ToInstance';
- }
+ my $args = $self->_canonicalize_apply_args($applicant, @_);
- $self->_check_required_methods($class, \%args);
- $self->_apply_methods($class, \%args);
- $self->_apply_attributes($class, \%args);
- $self->_apply_modifiers($class, \%args);
- $self->_append_roles($class, \%args);
+ $self->_check_required_methods($applicant, $args);
+ $self->_apply_methods($applicant, $args);
+ $self->_apply_attributes($applicant, $args);
+ $self->_apply_modifiers($applicant, $args);
+ $self->_append_roles($applicant, $args);
return;
}
sub combine_apply {
my(undef, $class, @roles) = @_;
+ if($class->isa('Mouse::Object')){
+ not_supported 'Application::ToInstance';
+ }
+
# check conflicting
my %method_provided;
my @method_conflicts;
my $attr = $role->get_attribute($attr_name);
my $c = $attr_provided{$attr_name};
if($c && $c != $attr){
- $class->throw_error("We have encountered an attribute conflict with '$attr_name' "\r
+ $class->throw_error("We have encountered an attribute conflict with '$attr_name' "
. "during composition. This is fatal error and cannot be disambiguated.")
}
else{
my $override = $role->get_override_method_modifier($method_name);
my $c = $override_provided{$method_name};
if($c && $c != $override){
- $class->throw_error( "We have encountered an 'override' method conflict with '$method_name' during "\r
- . "composition (Two 'override' methods of the same name encountered). "\r
+ $class->throw_error( "We have encountered an 'override' method conflict with '$method_name' during "
+ . "composition (Two 'override' methods of the same name encountered). "
. "This is fatal error.")
}
else{
my $role = $role_name->meta;
+ $args = $role->_canonicalize_apply_args($class, %{$args});
+
$role->_check_required_methods($class, $args, @roles);
$role->_apply_methods($class, $args);
$role->_apply_attributes($class, $args);
if($self->has_method($method_name)){
# This error happens in the override keyword or during role composition,
# so I added a message, "A local method of ...", only for compatibility (gfx)
- $self->throw_error("Cannot add an override of method '$method_name' "\r
+ $self->throw_error("Cannot add an override of method '$method_name' "
. "because there is a local version of '$method_name'"
. "(A local method of the same name as been found)");
}
$self->{override_method_modifiers}->{$method_name} = $method;
}
-sub has_override_method_modifier {\r
- my ($self, $method_name) = @_;\r
- return exists $self->{override_method_modifiers}->{$method_name};\r
-}\r
-\r
-sub get_override_method_modifier {\r
- my ($self, $method_name) = @_;\r
- return $self->{override_method_modifiers}->{$method_name};\r
+sub has_override_method_modifier {
+ my ($self, $method_name) = @_;
+ return exists $self->{override_method_modifiers}->{$method_name};
+}
+
+sub get_override_method_modifier {
+ my ($self, $method_name) = @_;
+ return $self->{override_method_modifiers}->{$method_name};
}
sub get_method_modifier_list {
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