X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoose%2FMeta%2FRole.pm;h=f1fd0c76cae86739052f2b06edeff3a7a4fe49c5;hb=4b2189ce8dae168787b635b71a918bd64461ed7a;hp=ef60f781ffe3f21c5a884d5540b23fac4b0766f8;hpb=1c9db35c77752fc918e23bee1613dc6567087dc5;p=gitmo%2FMoose.git diff --git a/lib/Moose/Meta/Role.pm b/lib/Moose/Meta/Role.pm index ef60f78..f1fd0c7 100644 --- a/lib/Moose/Meta/Role.pm +++ b/lib/Moose/Meta/Role.pm @@ -5,11 +5,11 @@ use strict; use warnings; use metaclass; -use Sub::Name 'subname'; +use Scalar::Util 'blessed'; use Carp 'confess'; -use Scalar::Util 'blessed', 'reftype'; -our $VERSION = '0.12'; +our $VERSION = '0.72'; +$VERSION = eval $VERSION; our $AUTHORITY = 'cpan:STEVAN'; use Moose::Meta::Class; @@ -68,7 +68,7 @@ foreach my $action ( get_list => 'get_required_method_list', existence => 'requires_method', } - }, + }, { name => 'attribute_map', attr_reader => 'get_attribute_map', @@ -122,6 +122,10 @@ foreach my $action ( sub add_attribute { my $self = shift; my $name = shift; + unless ( defined $name && $name ) { + require Moose; + Moose->throw_error("You must provide a name for the attribute"); + } my $attr_desc; if (scalar @_ == 1 && ref($_[0]) eq 'HASH') { $attr_desc = $_[0]; @@ -132,13 +136,14 @@ sub add_attribute { $self->get_attribute_map->{$name} = $attr_desc; } -sub _clean_up_required_methods { - my $self = shift; - foreach my $method ($self->get_required_method_list) { - $self->remove_required_methods($method) - if $self->has_method($method); - } -} +# DEPRECATED +# sub _clean_up_required_methods { +# my $self = shift; +# foreach my $method ($self->get_required_method_list) { +# $self->remove_required_methods($method) +# if $self->has_method($method); +# } +# } ## ------------------------------------------------------------------ ## method modifiers @@ -214,8 +219,8 @@ $META->add_attribute('override_method_modifiers' => ( sub add_override_method_modifier { my ($self, $method_name, $method) = @_; (!$self->has_method($method_name)) - || confess "Cannot add an override of method '$method_name' " . - "because there is a local version of '$method_name'"; + || Moose->throw_error("Cannot add an override of method '$method_name' " . + "because there is a local version of '$method_name'"); $self->get_override_method_modifiers_map->{$method_name} = $method; } @@ -240,6 +245,14 @@ sub get_method_modifier_list { keys %{$self->$accessor}; } +sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef } +sub update_package_cache_flag { + my $self = shift; + $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name); +} + + + ## ------------------------------------------------------------------ ## subroles @@ -251,8 +264,9 @@ __PACKAGE__->meta->add_attribute('roles' => ( sub add_role { my ($self, $role) = @_; (blessed($role) && $role->isa('Moose::Meta::Role')) - || confess "Roles must be instances of Moose::Meta::Role"; + || Moose->throw_error("Roles must be instances of Moose::Meta::Role"); push @{$self->get_roles} => $role; + $self->reset_package_cache_flag; } sub calculate_all_roles { @@ -268,7 +282,7 @@ sub calculate_all_roles { sub does_role { my ($self, $role_name) = @_; (defined $role_name) - || confess "You must supply a role name to look for"; + || Moose->throw_error("You must supply a role name to look for"); # if we are it,.. then return true return 1 if $role_name eq $self->name; # otherwise.. check our children @@ -285,14 +299,28 @@ sub method_metaclass { 'Moose::Meta::Role::Method' } sub get_method_map { my $self = shift; - my $map = {}; + + my $current = Class::MOP::check_package_cache_flag($self->name); + + if (defined $self->{'_package_cache_flag'} && $self->{'_package_cache_flag'} == $current) { + return $self->{'methods'} ||= {}; + } + + $self->{_package_cache_flag} = $current; + + my $map = $self->{'methods'} ||= {}; my $role_name = $self->name; my $method_metaclass = $self->method_metaclass; - foreach my $symbol ($self->list_all_package_symbols('CODE')) { + my $all_code = $self->get_all_package_symbols('CODE'); + + foreach my $symbol (keys %{ $all_code }) { + my $code = $all_code->{$symbol}; - my $code = $self->get_package_symbol('&' . $symbol); + next if exists $map->{$symbol} && + defined $map->{$symbol} && + $map->{$symbol}->body == $code; my ($pkg, $name) = Class::MOP::get_code_info($code); @@ -304,17 +332,30 @@ sub get_method_map { # loudly (in the case of Curses.pm) so we # just be a little overly cautious here. # - SL - && eval { no warnings; blessed($pkg->meta) } + && eval { no warnings; blessed($pkg->meta) } # FIXME calls meta && $pkg->meta->isa('Moose::Meta::Role')) { my $role = $pkg->meta->name; next unless $self->does_role($role); } else { - next if ($pkg || '') ne $role_name && - ($name || '') ne '__ANON__'; + # NOTE: + # in 5.10 constant.pm the constants show up + # as being in the right package, but in pre-5.10 + # they show up as constant::__ANON__ so we + # make an exception here to be sure that things + # work as expected in both. + # - SL + unless ($pkg eq 'constant' && $name eq '__ANON__') { + next if ($pkg || '') ne $role_name || + (($name || '') ne '__ANON__' && ($pkg || '') ne $role_name); + } } - - $map->{$symbol} = $method_metaclass->wrap($code); + + $map->{$symbol} = $method_metaclass->wrap( + $code, + package_name => $role_name, + name => $name + ); } return $map; @@ -322,7 +363,7 @@ sub get_method_map { sub get_method { my ($self, $name) = @_; - $self->get_method_map->{$name} + $self->get_method_map->{$name}; } sub has_method { @@ -330,6 +371,53 @@ sub has_method { exists $self->get_method_map->{$name} ? 1 : 0 } +# FIXME this is copy-pasted from Class::MOP::Class +# refactor to inherit from some common base +sub wrap_method_body { + my ( $self, %args ) = @_; + + ('CODE' eq ref $args{body}) + || Moose->throw_error("Your code block must be a CODE reference"); + + $self->method_metaclass->wrap( + package_name => $self->name, + %args, + ); +} + +sub add_method { + my ($self, $method_name, $method) = @_; + (defined $method_name && $method_name) + || Moose->throw_error("You must define a method name"); + + my $body; + if (blessed($method)) { + $body = $method->body; + if ($method->package_name ne $self->name) { + $method = $method->clone( + package_name => $self->name, + name => $method_name + ) if $method->can('clone'); + } + } + else { + $body = $method; + $method = $self->wrap_method_body( body => $body, name => $method_name ); + } + + $method->attach_to_class($self); + + $self->get_method_map->{$method_name} = $method; + + my $full_method_name = ($self->name . '::' . $method_name); + $self->add_package_symbol( + { sigil => '&', type => 'CODE', name => $method_name }, + Class::MOP::subname($full_method_name => $body) + ); + + $self->update_package_cache_flag; # still valid, since we just added the method to the map, and if it was invalid before that then get_method_map updated it +} + sub find_method_by_name { (shift)->get_method(@_) } sub get_method_list { @@ -338,52 +426,170 @@ sub get_method_list { } sub alias_method { - my ($self, $method_name, $method) = @_; - (defined $method_name && $method_name) - || confess "You must define a method name"; - - my $body = (blessed($method) ? $method->body : $method); - ('CODE' eq (reftype($body) || '')) - || confess "Your code block must be a CODE reference"; + my $self = shift; - $self->add_package_symbol("&${method_name}" => $body); + $self->add_method(@_); } -#sub reset_package_cache_flag { () } -#sub update_package_cache_flag { () } - ## ------------------------------------------------------------------ ## role construction ## ------------------------------------------------------------------ sub apply { - my ($self, $other) = @_; - + my ($self, $other, @args) = @_; + + (blessed($other)) + || Moose->throw_error("You must pass in an blessed instance"); + if ($other->isa('Moose::Meta::Role')) { require Moose::Meta::Role::Application::ToRole; - return Moose::Meta::Role::Application::ToRole->new->apply($self, $other); + return Moose::Meta::Role::Application::ToRole->new(@args)->apply($self, $other); } elsif ($other->isa('Moose::Meta::Class')) { require Moose::Meta::Role::Application::ToClass; - return Moose::Meta::Role::Application::ToClass->new->apply($self, $other); + return Moose::Meta::Role::Application::ToClass->new(@args)->apply($self, $other); } else { require Moose::Meta::Role::Application::ToInstance; - return Moose::Meta::Role::Application::ToInstance->new->apply($self, $other); + return Moose::Meta::Role::Application::ToInstance->new(@args)->apply($self, $other); } } sub combine { - my ($class, @roles) = @_; + my ($class, @role_specs) = @_; require Moose::Meta::Role::Application::RoleSummation; - require Moose::Meta::Role::Composite; + require Moose::Meta::Role::Composite; + + my (@roles, %role_params); + while (@role_specs) { + my ($role, $params) = @{ splice @role_specs, 0, 1 }; + push @roles => $role->meta; + next unless defined $params; + $role_params{$role} = $params; + } my $c = Moose::Meta::Role::Composite->new(roles => \@roles); - Moose::Meta::Role::Application::RoleSummation->new->apply($c); + Moose::Meta::Role::Application::RoleSummation->new( + role_params => \%role_params + )->apply($c); + return $c; } +sub create { + my ( $role, $package_name, %options ) = @_; + + $options{package} = $package_name; + + (ref $options{attributes} eq 'HASH') + || confess "You must pass a HASH ref of attributes" + if exists $options{attributes}; + + (ref $options{methods} eq 'HASH') + || confess "You must pass a HASH ref of methods" + if exists $options{methods}; + + $role->SUPER::create(%options); + + my (%initialize_options) = %options; + delete @initialize_options{qw( + package + attributes + methods + version + authority + )}; + + my $meta = $role->initialize( $package_name => %initialize_options ); + + # FIXME totally lame + $meta->add_method('meta' => sub { + $role->initialize(ref($_[0]) || $_[0]); + }); + + if (exists $options{attributes}) { + foreach my $attribute_name (keys %{$options{attributes}}) { + my $attr = $options{attributes}->{$attribute_name}; + $meta->add_attribute($attribute_name => $attr); + } + } + + if (exists $options{methods}) { + foreach my $method_name (keys %{$options{methods}}) { + $meta->add_method($method_name, $options{methods}->{$method_name}); + } + } + + Class::MOP::weaken_metaclass($meta->name) + if $meta->is_anon_role; + + return $meta; +} + +# anonymous roles. most of it is copied straight out of Class::MOP::Class. +# an intrepid hacker might find great riches if he unifies this code with that +# code in Class::MOP::Module or Class::MOP::Package +{ + # NOTE: + # this should be sufficient, if you have a + # use case where it is not, write a test and + # I will change it. + my $ANON_ROLE_SERIAL = 0; + + # NOTE: + # we need a sufficiently annoying prefix + # this should suffice for now, this is + # used in a couple of places below, so + # need to put it up here for now. + my $ANON_ROLE_PREFIX = 'Moose::Meta::Role::__ANON__::SERIAL::'; + + sub is_anon_role { + my $self = shift; + no warnings 'uninitialized'; + $self->name =~ /^$ANON_ROLE_PREFIX/; + } + + sub create_anon_role { + my ($role, %options) = @_; + my $package_name = $ANON_ROLE_PREFIX . ++$ANON_ROLE_SERIAL; + return $role->create($package_name, %options); + } + + # NOTE: + # this will only get called for + # anon-roles, all other calls + # are assumed to occur during + # global destruction and so don't + # really need to be handled explicitly + sub DESTROY { + my $self = shift; + + return if Class::MOP::in_global_destruction(); # it'll happen soon anyway and this just makes things more complicated + + no warnings 'uninitialized'; + return unless $self->name =~ /^$ANON_ROLE_PREFIX/; + + # XXX: is this necessary for us? I don't understand what it's doing + # -sartak + + # Moose does a weird thing where it replaces the metaclass for + # class when fixing metaclass incompatibility. In that case, + # we don't want to clean out the namespace now. We can detect + # that because Moose will explicitly update the singleton + # cache in Class::MOP. + #my $current_meta = Class::MOP::get_metaclass_by_name($self->name); + #return if $current_meta ne $self; + + my ($serial_id) = ($self->name =~ /^$ANON_ROLE_PREFIX(\d+)/); + no strict 'refs'; + foreach my $key (keys %{$ANON_ROLE_PREFIX . $serial_id}) { + delete ${$ANON_ROLE_PREFIX . $serial_id}{$key}; + } + delete ${'main::' . $ANON_ROLE_PREFIX}{$serial_id . '::'}; + } +} + ##################################################################### ## NOTE: ## This is Moose::Meta::Role as defined by Moose (plus the use of @@ -532,6 +738,8 @@ probably not that much really). =item B +=item B + =item B =back @@ -580,6 +788,10 @@ probably not that much really). =item B +=item B + +=item B + =item B =item B @@ -672,6 +884,16 @@ probably not that much really). =back +=over 4 + +=item B + +=item B + +=item B + +=back + =head1 BUGS All complex software has bugs lurking in it, and this module is no @@ -684,7 +906,7 @@ Stevan Little Estevan@iinteractive.comE =head1 COPYRIGHT AND LICENSE -Copyright 2006, 2007 by Infinity Interactive, Inc. +Copyright 2006-2009 by Infinity Interactive, Inc. L