X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FClass%2FMOP%2FClass.pm;h=d994d20c7ff873cdeefced865ed3ad40b3620fff;hb=caab0eaaa67d626df9e0113822d95fcfa0968022;hp=ee65f1def6d6171663101c60b83611a22d413091;hpb=1d68af0454f55a8b088f8bc1887a0a5ce54d2a22;p=gitmo%2FClass-MOP.git diff --git a/lib/Class/MOP/Class.pm b/lib/Class/MOP/Class.pm index ee65f1d..d994d20 100644 --- a/lib/Class/MOP/Class.pm +++ b/lib/Class/MOP/Class.pm @@ -9,19 +9,13 @@ use Class::MOP::Instance; use Class::MOP::Method::Wrapped; use Carp 'confess'; -use Scalar::Util 'blessed', 'reftype', 'weaken'; -use Sub::Name 'subname'; -use B 'svref_2object'; +use Scalar::Util 'blessed', 'weaken'; -our $VERSION = '0.23'; +our $VERSION = '0.65'; our $AUTHORITY = 'cpan:STEVAN'; use base 'Class::MOP::Module'; -# Self-introspection - -sub meta { Class::MOP::Class->initialize(blessed($_[0]) || $_[0]) } - # Creation sub initialize { @@ -29,10 +23,8 @@ sub initialize { my $package_name = shift; (defined $package_name && $package_name && !blessed($package_name)) || confess "You must pass a package name and it cannot be blessed"; - if (defined(my $meta = Class::MOP::get_metaclass_by_name($package_name))) { - return $meta; - } - $class->construct_class_instance('package' => $package_name, @_); + return Class::MOP::get_metaclass_by_name($package_name) + || $class->construct_class_instance('package' => $package_name, @_); } sub reinitialize { @@ -78,11 +70,11 @@ sub construct_class_instance { # now create the metaclass my $meta; - if ($class =~ /^Class::MOP::Class$/) { + if ($class eq 'Class::MOP::Class') { no strict 'refs'; $meta = bless { # inherited from Class::MOP::Package - '$!package' => $package_name, + 'package' => $package_name, # NOTE: # since the following attributes will @@ -92,18 +84,27 @@ sub construct_class_instance { # listed here for reference, because they # should not actually have a value associated # with the slot. - '%!namespace' => \undef, + 'namespace' => \undef, # inherited from Class::MOP::Module - '$!version' => \undef, - '$!authority' => \undef, + 'version' => \undef, + 'authority' => \undef, # defined in Class::MOP::Class - '@!superclasses' => \undef, - - '%!methods' => {}, - '%!attributes' => {}, - '$!attribute_metaclass' => $options{'attribute_metaclass'} || 'Class::MOP::Attribute', - '$!method_metaclass' => $options{'method_metaclass'} || 'Class::MOP::Method', - '$!instance_metaclass' => $options{'instance_metaclass'} || 'Class::MOP::Instance', + 'superclasses' => \undef, + + 'methods' => {}, + 'attributes' => {}, + 'attribute_metaclass' => $options{'attribute_metaclass'} || 'Class::MOP::Attribute', + 'method_metaclass' => $options{'method_metaclass'} || 'Class::MOP::Method', + 'instance_metaclass' => $options{'instance_metaclass'} || 'Class::MOP::Instance', + + ## uber-private variables + # NOTE: + # this starts out as undef so that + # we can tell the first time the + # methods are fetched + # - SL + '_package_cache_flag' => undef, + '_meta_instance' => undef, } => $class; } else { @@ -115,7 +116,7 @@ sub construct_class_instance { } # and check the metaclass compatibility - $meta->check_metaclass_compatability(); + $meta->check_metaclass_compatability(); Class::MOP::store_metaclass_by_name($package_name, $meta); @@ -127,6 +128,18 @@ sub construct_class_instance { $meta; } +sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef } +sub update_package_cache_flag { + my $self = shift; + # NOTE: + # we can manually update the cache number + # since we are actually adding the method + # to our cache as well. This avoids us + # having to regenerate the method_map. + # - SL + $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name); +} + sub check_metaclass_compatability { my $self = shift; @@ -134,7 +147,7 @@ sub check_metaclass_compatability { return if blessed($self) eq 'Class::MOP::Class' && $self->instance_metaclass eq 'Class::MOP::Instance'; - my @class_list = $self->class_precedence_list; + my @class_list = $self->linearized_isa; shift @class_list; # shift off $self->name foreach my $class_name (@class_list) { @@ -213,17 +226,27 @@ sub check_metaclass_compatability { # creating classes with MOP ... sub create { - my $class = shift; - my $package_name = shift; + my ( $class, @args ) = @_; - (defined $package_name && $package_name) - || confess "You must pass a package name"; + unshift @args, 'name' if @args % 2 == 1; - (scalar @_ % 2 == 0) - || confess "You much pass all parameters as name => value pairs " . - "(I found an uneven number of params in \@_)"; + my (%options) = @args; + my $package_name = $options{name}; - my (%options) = @_; + (defined $package_name && $package_name) + || confess "You must pass a package name"; + + (ref $options{superclasses} eq 'ARRAY') + || confess "You must pass an ARRAY ref of superclasses" + if exists $options{superclasses}; + + (ref $options{attributes} eq 'ARRAY') + || confess "You must pass an ARRAY ref of attributes" + if exists $options{attributes}; + + (ref $options{methods} eq 'HASH') + || confess "You must pass an HASH ref of methods" + if exists $options{methods}; my $code = "package $package_name;"; $code .= "\$$package_name\:\:VERSION = '" . $options{version} . "';" @@ -236,6 +259,7 @@ sub create { my $meta = $class->initialize($package_name); + # FIXME totally lame $meta->add_method('meta' => sub { $class->initialize(blessed($_[0]) || $_[0]); }); @@ -266,32 +290,54 @@ sub create { # all these attribute readers will be bootstrapped # away in the Class::MOP bootstrap section -sub get_attribute_map { $_[0]->{'%!attributes'} } -sub attribute_metaclass { $_[0]->{'$!attribute_metaclass'} } -sub method_metaclass { $_[0]->{'$!method_metaclass'} } -sub instance_metaclass { $_[0]->{'$!instance_metaclass'} } +sub get_attribute_map { $_[0]->{'attributes'} } +sub attribute_metaclass { $_[0]->{'attribute_metaclass'} } +sub method_metaclass { $_[0]->{'method_metaclass'} } +sub instance_metaclass { $_[0]->{'instance_metaclass'} } # FIXME: # this is a prime canidate for conversion to XS sub get_method_map { my $self = shift; - my $map = $self->{'%!methods'}; + + if (defined $self->{'_package_cache_flag'} && + $self->{'_package_cache_flag'} == Class::MOP::check_package_cache_flag($self->name)) { + return $self->{'methods'}; + } + + my $map = $self->{'methods'}; my $class_name = $self->name; my $method_metaclass = $self->method_metaclass; - foreach my $symbol ($self->list_all_package_symbols('CODE')) { - my $code = $self->get_package_symbol('&' . $symbol); + my %all_code = $self->get_all_package_symbols('CODE'); + + foreach my $symbol (keys %all_code) { + my $code = $all_code{$symbol}; next if exists $map->{$symbol} && defined $map->{$symbol} && $map->{$symbol}->body == $code; - my $gv = svref_2object($code)->GV; - next if ($gv->STASH->NAME || '') ne $class_name && - ($gv->NAME || '') ne '__ANON__'; + my ($pkg, $name) = Class::MOP::get_code_info($code); + + # 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 $class_name || + (($name || '') ne '__ANON__' && ($pkg || '') ne $class_name); + } - $map->{$symbol} = $method_metaclass->wrap($code); + $map->{$symbol} = $method_metaclass->wrap( + $code, + package_name => $class_name, + name => $symbol, + ); } return $map; @@ -301,6 +347,7 @@ sub get_method_map { sub new_object { my $class = shift; + # NOTE: # we need to protect the integrity of the # Class::MOP::Class singletons here, so we @@ -321,7 +368,7 @@ sub construct_instance { # NOTE: # this will only work for a HASH instance type if ($class->is_anon_class) { - (reftype($instance) eq 'HASH') + (Scalar::Util::reftype($instance) eq 'HASH') || confess "Currently only HASH based instances are supported with instance of anon-classes"; # NOTE: # At some point we should make this official @@ -333,11 +380,12 @@ sub construct_instance { return $instance; } + sub get_meta_instance { - my $class = shift; - return $class->instance_metaclass->new( - $class, - $class->compute_all_applicable_attributes() + my $self = shift; + $self->{'_meta_instance'} ||= $self->instance_metaclass->new( + associated_metaclass => $self, + attributes => [ $self->compute_all_applicable_attributes() ], ); } @@ -345,7 +393,8 @@ sub clone_object { my $class = shift; my $instance = shift; (blessed($instance) && $instance->isa($class->name)) - || confess "You must pass an instance ($instance) of the metaclass (" . $class->name . ")"; + || confess "You must pass an instance of the metaclass (" . $class->name . "), not ($instance)"; + # NOTE: # we need to protect the integrity of the # Class::MOP::Class singletons here, they @@ -357,50 +406,164 @@ sub clone_object { sub clone_instance { my ($class, $instance, %params) = @_; (blessed($instance)) - || confess "You can only clone instances, \$self is not a blessed instance"; + || confess "You can only clone instances, ($instance) is not a blessed instance"; my $meta_instance = $class->get_meta_instance(); my $clone = $meta_instance->clone_instance($instance); foreach my $attr ($class->compute_all_applicable_attributes()) { - if (exists $params{$attr->init_arg}) { - $meta_instance->set_slot_value($clone, $attr->name, $params{$attr->init_arg}); + if ( defined( my $init_arg = $attr->init_arg ) ) { + if (exists $params{$init_arg}) { + $attr->set_value($clone, $params{$init_arg}); + } } } return $clone; } +sub rebless_instance { + my ($self, $instance, %params) = @_; + + my $old_metaclass; + if ($instance->can('meta')) { + ($instance->meta->isa('Class::MOP::Class')) + || confess 'Cannot rebless instance if ->meta is not an instance of Class::MOP::Class'; + $old_metaclass = $instance->meta; + } + else { + $old_metaclass = $self->initialize(blessed($instance)); + } + + my $meta_instance = $self->get_meta_instance(); + + $self->name->isa($old_metaclass->name) + || confess "You may rebless only into a subclass of (". $old_metaclass->name ."), of which (". $self->name .") isn't."; + + # rebless! + $meta_instance->rebless_instance_structure($instance, $self); + + foreach my $attr ( $self->compute_all_applicable_attributes ) { + if ( $attr->has_value($instance) ) { + if ( defined( my $init_arg = $attr->init_arg ) ) { + $params{$init_arg} = $attr->get_value($instance) + unless exists $params{$init_arg}; + } + else { + $attr->set_value($instance, $attr->get_value($instance)); + } + } + } + + foreach my $attr ($self->compute_all_applicable_attributes) { + $attr->initialize_instance_slot($meta_instance, $instance, \%params); + } + + $instance; +} + # Inheritance sub superclasses { - my $self = shift; + my $self = shift; + my $var_spec = { sigil => '@', type => 'ARRAY', name => 'ISA' }; if (@_) { my @supers = @_; - @{$self->get_package_symbol('@ISA')} = @supers; + @{$self->get_package_symbol($var_spec)} = @supers; # NOTE: # we need to check the metaclass - # compatability here so that we can + # compatibility here so that we can # be sure that the superclass is # not potentially creating an issues # we don't know about $self->check_metaclass_compatability(); } - @{$self->get_package_symbol('@ISA')}; + @{$self->get_package_symbol($var_spec)}; +} + +sub subclasses { + my $self = shift; + + my $super_class = $self->name; + + if ( Class::MOP::HAVE_ISAREV() ) { + return @{ $super_class->mro::get_isarev() }; + } else { + my @derived_classes; + + my $find_derived_classes; + $find_derived_classes = sub { + my ($outer_class) = @_; + + my $symbol_table_hashref = do { no strict 'refs'; \%{"${outer_class}::"} }; + + SYMBOL: + for my $symbol ( keys %$symbol_table_hashref ) { + next SYMBOL if $symbol !~ /\A (\w+):: \z/x; + my $inner_class = $1; + + next SYMBOL if $inner_class eq 'SUPER'; # skip '*::SUPER' + + my $class = + $outer_class + ? "${outer_class}::$inner_class" + : $inner_class; + + if ( $class->isa($super_class) and $class ne $super_class ) { + push @derived_classes, $class; + } + + next SYMBOL if $class eq 'main'; # skip 'main::*' + + $find_derived_classes->($class); + } + }; + + my $root_class = q{}; + $find_derived_classes->($root_class); + + undef $find_derived_classes; + + @derived_classes = sort { $a->isa($b) ? 1 : $b->isa($a) ? -1 : 0 } @derived_classes; + + return @derived_classes; + } +} + + +sub linearized_isa { + return @{ mro::get_linear_isa( (shift)->name ) }; } sub class_precedence_list { my $self = shift; - # NOTE: - # We need to check for ciruclar inheirtance here. - # This will do nothing if all is well, and blow - # up otherwise. Yes, it's an ugly hack, better - # suggestions are welcome. - { ($self->name || return)->isa('This is a test for circular inheritance') } - - ( - $self->name, - map { - $self->initialize($_)->class_precedence_list() - } $self->superclasses() - ); + my $name = $self->name; + + unless (Class::MOP::IS_RUNNING_ON_5_10()) { + # NOTE: + # We need to check for circular inheritance here + # if we are are not on 5.10, cause 5.8 detects it + # late. This will do nothing if all is well, and + # blow up otherwise. Yes, it's an ugly hack, better + # suggestions are welcome. + # - SL + ($name || return)->isa('This is a test for circular inheritance') + } + + # if our mro is c3, we can + # just grab the linear_isa + if (mro::get_mro($name) eq 'c3') { + return @{ mro::get_linear_isa($name) } + } + else { + # NOTE: + # we can't grab the linear_isa for dfs + # since it has all the duplicates + # already removed. + return ( + $name, + map { + $self->initialize($_)->class_precedence_list() + } $self->superclasses() + ); + } } ## Methods @@ -413,17 +576,36 @@ sub add_method { my $body; if (blessed($method)) { $body = $method->body; + if ($method->package_name ne $self->name && + $method->name ne $method_name) { + warn "Hello there, got something for you." + . " Method says " . $method->package_name . " " . $method->name + . " Class says " . $self->name . " " . $method_name; + $method = $method->clone( + package_name => $self->name, + name => $method_name + ) if $method->can('clone'); + } } else { $body = $method; - ('CODE' eq (reftype($body) || '')) + ('CODE' eq ref($body)) || confess "Your code block must be a CODE reference"; - $method = $self->method_metaclass->wrap($body); + $method = $self->method_metaclass->wrap( + $body => ( + package_name => $self->name, + name => $method_name + ) + ); } $self->get_method_map->{$method_name} = $method; - - my $full_method_name = ($self->name . '::' . $method_name); - $self->add_package_symbol("&${method_name}" => subname $full_method_name => $body); + + 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; } { @@ -457,7 +639,9 @@ sub add_method { (defined $method_name && $method_name) || confess "You must pass in a method name"; my $method = $fetch_and_prepare_method->($self, $method_name); - $method->add_before_modifier(subname ':before' => $method_modifier); + $method->add_before_modifier( + Class::MOP::subname(':before' => $method_modifier) + ); } sub add_after_method_modifier { @@ -465,7 +649,9 @@ sub add_method { (defined $method_name && $method_name) || confess "You must pass in a method name"; my $method = $fetch_and_prepare_method->($self, $method_name); - $method->add_after_modifier(subname ':after' => $method_modifier); + $method->add_after_modifier( + Class::MOP::subname(':after' => $method_modifier) + ); } sub add_around_method_modifier { @@ -473,7 +659,9 @@ sub add_method { (defined $method_name && $method_name) || confess "You must pass in a method name"; my $method = $fetch_and_prepare_method->($self, $method_name); - $method->add_around_modifier(subname ':around' => $method_modifier); + $method->add_around_modifier( + Class::MOP::subname(':around' => $method_modifier) + ); } # NOTE: @@ -496,10 +684,13 @@ sub alias_method { || confess "You must define a method name"; my $body = (blessed($method) ? $method->body : $method); - ('CODE' eq (reftype($body) || '')) + ('CODE' eq ref($body)) || confess "Your code block must be a CODE reference"; - $self->add_package_symbol("&${method_name}" => $body); + $self->add_package_symbol( + { sigil => '&', type => 'CODE', name => $method_name } => $body + ); + $self->update_package_cache_flag; } sub has_method { @@ -530,12 +721,13 @@ sub remove_method { (defined $method_name && $method_name) || confess "You must define a method name"; - my $removed_method = $self->get_method($method_name); - - do { - $self->remove_package_symbol("&${method_name}"); - delete $self->get_method_map->{$method_name}; - } if defined $removed_method; + my $removed_method = delete $self->get_method_map->{$method_name}; + + $self->remove_package_symbol( + { sigil => '&', type => 'CODE', name => $method_name } + ); + + $self->update_package_cache_flag; return $removed_method; } @@ -549,15 +741,7 @@ sub find_method_by_name { my ($self, $method_name) = @_; (defined $method_name && $method_name) || confess "You must define a method name to find"; - # keep a record of what we have seen - # here, this will handle all the - # inheritence issues because we are - # using the &class_precedence_list - my %seen_class; - my @cpl = $self->class_precedence_list(); - foreach my $class (@cpl) { - next if $seen_class{$class}; - $seen_class{$class}++; + foreach my $class ($self->linearized_isa) { # fetch the meta-class ... my $meta = $self->initialize($class); return $meta->get_method($method_name) @@ -568,15 +752,8 @@ sub find_method_by_name { sub compute_all_applicable_methods { my $self = shift; - my @methods; - # keep a record of what we have seen - # here, this will handle all the - # inheritence issues because we are - # using the &class_precedence_list - my (%seen_class, %seen_method); - foreach my $class ($self->class_precedence_list()) { - next if $seen_class{$class}; - $seen_class{$class}++; + my (@methods, %seen_method); + foreach my $class ($self->linearized_isa) { # fetch the meta-class ... my $meta = $self->initialize($class); foreach my $method_name ($meta->get_method_list()) { @@ -597,14 +774,7 @@ sub find_all_methods_by_name { (defined $method_name && $method_name) || confess "You must define a method name to find"; my @methods; - # keep a record of what we have seen - # here, this will handle all the - # inheritence issues because we are - # using the &class_precedence_list - my %seen_class; - foreach my $class ($self->class_precedence_list()) { - next if $seen_class{$class}; - $seen_class{$class}++; + foreach my $class ($self->linearized_isa) { # fetch the meta-class ... my $meta = $self->initialize($class); push @methods => { @@ -620,16 +790,9 @@ sub find_next_method_by_name { my ($self, $method_name) = @_; (defined $method_name && $method_name) || confess "You must define a method name to find"; - # keep a record of what we have seen - # here, this will handle all the - # inheritence issues because we are - # using the &class_precedence_list - my %seen_class; - my @cpl = $self->class_precedence_list(); + my @cpl = $self->linearized_isa; shift @cpl; # discard ourselves foreach my $class (@cpl) { - next if $seen_class{$class}; - $seen_class{$class}++; # fetch the meta-class ... my $meta = $self->initialize($class); return $meta->get_method($method_name) @@ -658,12 +821,32 @@ sub add_attribute { # name here so that we can properly detach # the old attr object, and remove any # accessors it would have generated - $self->remove_attribute($attribute->name) - if $self->has_attribute($attribute->name); + if ( $self->has_attribute($attribute->name) ) { + $self->remove_attribute($attribute->name); + } else { + $self->invalidate_meta_instances(); + } # then onto installing the new accessors - $attribute->install_accessors(); $self->get_attribute_map->{$attribute->name} = $attribute; + + # invalidate package flag here + $attribute->install_accessors(); + + return $attribute; +} + +sub invalidate_meta_instances { + my $self = shift; + + my @metas = ( $self, map { Class::MOP::Class->initialize($_) } $self->subclasses ); + + $_->invalidate_meta_instance() for @metas; +} + +sub invalidate_meta_instance { + my $self = shift; + undef $self->{_meta_instance}; } sub has_attribute { @@ -691,6 +874,7 @@ sub remove_attribute { my $removed_attribute = $self->get_attribute_map->{$attribute_name}; return unless defined $removed_attribute; delete $self->get_attribute_map->{$attribute_name}; + $self->invalidate_meta_instances(); $removed_attribute->remove_accessors(); $removed_attribute->detach_from_class(); return $removed_attribute; @@ -703,15 +887,8 @@ sub get_attribute_list { sub compute_all_applicable_attributes { my $self = shift; - my @attrs; - # keep a record of what we have seen - # here, this will handle all the - # inheritence issues because we are - # using the &class_precedence_list - my (%seen_class, %seen_attr); - foreach my $class ($self->class_precedence_list()) { - next if $seen_class{$class}; - $seen_class{$class}++; + my (@attrs, %seen_attr); + foreach my $class ($self->linearized_isa) { # fetch the meta-class ... my $meta = $self->initialize($class); foreach my $attr_name ($meta->get_attribute_list()) { @@ -725,14 +902,7 @@ sub compute_all_applicable_attributes { sub find_attribute_by_name { my ($self, $attr_name) = @_; - # keep a record of what we have seen - # here, this will handle all the - # inheritence issues because we are - # using the &class_precedence_list - my %seen_class; - foreach my $class ($self->class_precedence_list()) { - next if $seen_class{$class}; - $seen_class{$class}++; + foreach my $class ($self->linearized_isa) { # fetch the meta-class ... my $meta = $self->initialize($class); return $meta->get_attribute($attr_name) @@ -765,17 +935,37 @@ sub is_immutable { 0 } # the reference stored in $IMMUTABLE_TRANSFORMERS{$class} and ||= should DWIM { + my %IMMUTABLE_TRANSFORMERS; my %IMMUTABLE_OPTIONS; + + sub get_immutable_options { + my $self = shift; + return if $self->is_mutable; + confess "unable to find immutabilizing options" + unless exists $IMMUTABLE_OPTIONS{$self->name}; + my %options = %{$IMMUTABLE_OPTIONS{$self->name}}; + delete $options{IMMUTABLE_TRANSFORMER}; + return \%options; + } + + sub get_immutable_transformer { + my $self = shift; + if( $self->is_mutable ){ + my $class = blessed $self || $self; + return $IMMUTABLE_TRANSFORMERS{$class} ||= $self->create_immutable_transformer; + } + confess "unable to find transformer for immutable class" + unless exists $IMMUTABLE_OPTIONS{$self->name}; + return $IMMUTABLE_OPTIONS{$self->name}->{IMMUTABLE_TRANSFORMER}; + } + sub make_immutable { my $self = shift; my %options = @_; - my $class = blessed $self || $self; - - $IMMUTABLE_TRANSFORMERS{$class} ||= $self->create_immutable_transformer; - my $transformer = $IMMUTABLE_TRANSFORMERS{$class}; - $transformer->make_metaclass_immutable($self, %options); + my $transformer = $self->get_immutable_transformer; + $transformer->make_metaclass_immutable($self, \%options); $IMMUTABLE_OPTIONS{$self->name} = { %options, IMMUTABLE_TRANSFORMER => $transformer }; @@ -783,6 +973,8 @@ sub is_immutable { 0 } print STDERR "# of Metaclass options: ", keys %IMMUTABLE_OPTIONS; print STDERR "# of Immutable transformers: ", keys %IMMUTABLE_TRANSFORMERS; } + + 1; } sub make_mutable{ @@ -791,29 +983,42 @@ sub is_immutable { 0 } my $options = delete $IMMUTABLE_OPTIONS{$self->name}; confess "unable to find immutabilizing options" unless ref $options; my $transformer = delete $options->{IMMUTABLE_TRANSFORMER}; - $transformer->make_metaclass_mutable($self, %$options); + $transformer->make_metaclass_mutable($self, $options); + 1; } } sub create_immutable_transformer { my $self = shift; my $class = Class::MOP::Immutable->new($self, { - read_only => [qw/superclasses/], - cannot_call => [qw/ + read_only => [qw/superclasses/], + cannot_call => [qw/ add_method alias_method remove_method add_attribute remove_attribute - add_package_symbol remove_package_symbol - /], - memoize => { + /], + memoize => { class_precedence_list => 'ARRAY', + linearized_isa => 'ARRAY', compute_all_applicable_attributes => 'ARRAY', get_meta_instance => 'SCALAR', get_method_map => 'SCALAR', - } + }, + # NOTE: + # this is ugly, but so are typeglobs, + # so whattayahgonnadoboutit + # - SL + wrapped => { + add_package_symbol => sub { + my $original = shift; + confess "Cannot add package symbols to an immutable metaclass" + unless (caller(2))[3] eq 'Class::MOP::Package::get_package_symbol'; + goto $original->body; + }, + }, }); return $class; } @@ -956,6 +1161,29 @@ metaclass you are creating is compatible with the metaclasses of all your ancestors. For more inforamtion about metaclass compatibility see the C section in L. +=item B + +This will reset the package cache flag for this particular metaclass +it is basically the value of the C +function. This is very rarely needed from outside of C +but in some cases you might want to use it, so it is here. + +=item B + +Clears the package cache flag to announce to the internals that we need +to rebuild the method map. + +=item B + +Clears the cached meta instance for this metaclass and all of its subclasses. + +Called by C and C to recalculate the attribute +slots. + +=item B + +Used by C. + =back =head2 Object instance construction and cloning @@ -967,8 +1195,14 @@ to use them or not. =item B +Returns the class name of the instance metaclass, see L +for more information on the instance metaclasses. + =item B +Returns an instance of L to be used in the construction +of a new instance of the class. + =item B This is a convience method for creating a new object of the class, and @@ -980,12 +1214,9 @@ would call a C this method like so: $class->meta->new_object(%params); } -Of course the ideal place for this would actually be in C -but that is considered bad style, so we do not do that. - =item B -This method is used to construct an instace structure suitable for +This method is used to construct an instance structure suitable for C-ing into your package of choice. It works in conjunction with the Attribute protocol to collect all applicable attributes. @@ -1009,9 +1240,6 @@ class would call a C this method like so: $self->meta->clone_object($self, %params); } -Of course the ideal place for this would actually be in C -but that is considered bad style, so we do not do that. - =item B This method is a compliment of C (which means if @@ -1030,6 +1258,13 @@ shallow cloning is outside the scope of the meta-object protocol. I think Yuval "nothingmuch" Kogman put it best when he said that cloning is too I to be part of the MOP. +=item B + +This will change the class of C<$instance> to the class of the invoking +C. You may only rebless the instance to a subclass of +itself. You may pass in optional C<%params> which are like constructor +params and will override anything already defined in the instance. + =back =head2 Informational @@ -1062,18 +1297,20 @@ This is a read-write attribute which represents the superclass relationships of the class the B instance is associated with. Basically, it can get and set the C<@ISA> for you. -B -Perl will occasionally perform some C<@ISA> and method caching, if -you decide to change your superclass relationship at runtime (which -is quite insane and very much not recommened), then you should be -aware of this and the fact that this module does not make any -attempt to address this issue. - =item B This computes the a list of all the class's ancestors in the same order -in which method dispatch will be done. This is similair to -what B does, but we don't remove duplicate names. +in which method dispatch will be done. This is similair to what +B does, but we don't remove duplicate names. + +=item B + +This returns a list based on C but with all +duplicates removed. + +=item B + +This returns a list of subclasses for this class. =back @@ -1083,8 +1320,13 @@ what B does, but we don't remove duplicate names. =item B +Returns a HASH ref of name to CODE reference mapping for this class. + =item B +Returns the class name of the method metaclass, see L +for more information on the method metaclasses. + =item B This will take a C<$method_name> and CODE reference to that @@ -1138,7 +1380,7 @@ C<$method_name>, or return undef if that method does not exist. The Class::MOP::Method is codifiable, so you can use it like a normal CODE reference, see L for more information. -=item B +=item B This will return a CODE reference of the specified C<$method_name>, or return undef if that method does not exist. @@ -1297,9 +1539,14 @@ their own. See L for more details. =item B +Returns the class name of the attribute metaclass, see L +for more information on the attribute metaclasses. + =item B -=item B +This returns a HASH ref of name to attribute meta-object mapping. + +=item B This stores the C<$attribute_meta_object> (or creates one from the C<$attribute_name> and C<%attribute_spec>) in the B @@ -1383,6 +1630,15 @@ the L documentation. This method will reverse tranforamtion upon the class which made it immutable. +=item B + +Return a transformer suitable for making this class immutable or, if this +class is immutable, the transformer used to make it immutable. + +=item B + +If the class is immutable, return the options used to make it immutable. + =item B Create a transformer suitable for making this class immutable @@ -1395,7 +1651,7 @@ Stevan Little Estevan@iinteractive.comE =head1 COPYRIGHT AND LICENSE -Copyright 2006, 2007 by Infinity Interactive, Inc. +Copyright 2006-2008 by Infinity Interactive, Inc. L