X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FClass%2FMOP%2FClass.pm;h=0c432307d64f1d184839e5c4e264491bd3918cd3;hb=6e1c8b63d87c6e1d8e84e15cc2c1f5336780515b;hp=6ebd6d121bcd1765f70e37079e64a4f4f8f8f90f;hpb=2e41896ef928bb97cd490b03cd77f0280d802384;p=gitmo%2FClass-MOP.git
diff --git a/lib/Class/MOP/Class.pm b/lib/Class/MOP/Class.pm
index 6ebd6d1..0c43230 100644
--- a/lib/Class/MOP/Class.pm
+++ b/lib/Class/MOP/Class.pm
@@ -4,70 +4,271 @@ package Class::MOP::Class;
use strict;
use warnings;
-use Carp 'confess';
-use Scalar::Util 'blessed', 'reftype';
-use Sub::Name 'subname';
-use B 'svref_2object';
+use Class::MOP::Immutable;
+use Class::MOP::Instance;
+use Class::MOP::Method::Wrapped;
-our $VERSION = '0.02';
+use Carp 'confess';
+use Scalar::Util 'blessed', 'weaken';
-# Self-introspection
+our $VERSION = '0.63';
+our $AUTHORITY = 'cpan:STEVAN';
-sub meta { $_[0]->initialize($_[0]) }
+use base 'Class::MOP::Module';
# Creation
+sub initialize {
+ my $class = shift;
+ my $package_name = shift;
+ (defined $package_name && $package_name && !blessed($package_name))
+ || confess "You must pass a package name and it cannot be blessed";
+ return Class::MOP::get_metaclass_by_name($package_name)
+ || $class->construct_class_instance('package' => $package_name, @_);
+}
+
+sub reinitialize {
+ my $class = shift;
+ my $package_name = shift;
+ (defined $package_name && $package_name && !blessed($package_name))
+ || confess "You must pass a package name and it cannot be blessed";
+ Class::MOP::remove_metaclass_by_name($package_name);
+ $class->construct_class_instance('package' => $package_name, @_);
+}
+
+# NOTE: (meta-circularity)
+# this is a special form of &construct_instance
+# (see below), which is used to construct class
+# meta-object instances for any Class::MOP::*
+# class. All other classes will use the more
+# normal &construct_instance.
+sub construct_class_instance {
+ my $class = shift;
+ my %options = @_;
+ my $package_name = $options{'package'};
+ (defined $package_name && $package_name)
+ || confess "You must pass a package name";
+ # NOTE:
+ # return the metaclass if we have it cached,
+ # and it is still defined (it has not been
+ # reaped by DESTROY yet, which can happen
+ # annoyingly enough during global destruction)
+
+ if (defined(my $meta = Class::MOP::get_metaclass_by_name($package_name))) {
+ return $meta;
+ }
+
+ # NOTE:
+ # we need to deal with the possibility
+ # of class immutability here, and then
+ # get the name of the class appropriately
+ $class = (blessed($class)
+ ? ($class->is_immutable
+ ? $class->get_mutable_metaclass_name()
+ : blessed($class))
+ : $class);
+
+ # now create the metaclass
+ my $meta;
+ if ($class eq 'Class::MOP::Class') {
+ no strict 'refs';
+ $meta = bless {
+ # inherited from Class::MOP::Package
+ '$!package' => $package_name,
+
+ # NOTE:
+ # since the following attributes will
+ # actually be loaded from the symbol
+ # table, and actually bypass the instance
+ # entirely, we can just leave these things
+ # listed here for reference, because they
+ # should not actually have a value associated
+ # with the slot.
+ '%!namespace' => \undef,
+ # inherited from Class::MOP::Module
+ '$!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' => $options{'instance_metaclass'} || 'Class::MOP::Instance',
+
+ ## uber-private variables
+ # NOTE:
+ # this starts out as undef so that
+ # we can tell the first time the
+ # methods are fetched
+ # - SL
+ '$!_package_cache_flag' => undef,
+ '$!_meta_instance' => undef,
+ } => $class;
+ }
+ else {
+ # NOTE:
+ # it is safe to use meta here because
+ # class will always be a subclass of
+ # Class::MOP::Class, which defines meta
+ $meta = $class->meta->construct_instance(%options)
+ }
+
+ # and check the metaclass compatibility
+ $meta->check_metaclass_compatability();
+
+ Class::MOP::store_metaclass_by_name($package_name, $meta);
+
+ # NOTE:
+ # we need to weaken any anon classes
+ # so that they can call DESTROY properly
+ Class::MOP::weaken_metaclass($package_name) if $meta->is_anon_class;
+
+ $meta;
+}
+
+sub reset_package_cache_flag { (shift)->{'$!_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 $self = shift;
+
+ # this is always okay ...
+ return if blessed($self) eq 'Class::MOP::Class' &&
+ $self->instance_metaclass eq 'Class::MOP::Instance';
+
+ my @class_list = $self->linearized_isa;
+ shift @class_list; # shift off $self->name
+
+ foreach my $class_name (@class_list) {
+ my $meta = Class::MOP::get_metaclass_by_name($class_name) || next;
+
+ # NOTE:
+ # we need to deal with the possibility
+ # of class immutability here, and then
+ # get the name of the class appropriately
+ my $meta_type = ($meta->is_immutable
+ ? $meta->get_mutable_metaclass_name()
+ : blessed($meta));
+
+ ($self->isa($meta_type))
+ || confess $self->name . "->meta => (" . (blessed($self)) . ")" .
+ " is not compatible with the " .
+ $class_name . "->meta => (" . ($meta_type) . ")";
+ # NOTE:
+ # we also need to check that instance metaclasses
+ # are compatabile in the same the class.
+ ($self->instance_metaclass->isa($meta->instance_metaclass))
+ || confess $self->name . "->meta => (" . ($self->instance_metaclass) . ")" .
+ " is not compatible with the " .
+ $class_name . "->meta => (" . ($meta->instance_metaclass) . ")";
+ }
+}
+
+## ANON classes
+
{
- # Metaclasses are singletons, so we cache them here.
- # there is no need to worry about destruction though
- # because they should die only when the program dies.
- # After all, do package definitions even get reaped?
- my %METAS;
- sub initialize {
- my ($class, $package_name) = @_;
- (defined $package_name && $package_name)
- || confess "You must pass a package name";
- return $METAS{$package_name} if exists $METAS{$package_name};
- $METAS{$package_name} = $class->construct_class_instance($package_name);
+ # 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_CLASS_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_CLASS_PREFIX = 'Class::MOP::Class::__ANON__::SERIAL::';
+
+ sub is_anon_class {
+ my $self = shift;
+ no warnings 'uninitialized';
+ $self->name =~ /^$ANON_CLASS_PREFIX/ ? 1 : 0;
}
-
- # NOTE: (meta-circularity)
- # this is a special form of &construct_instance
- # (see below), which is used to construct class
- # meta-object instances for any Class::MOP::*
- # class. All other classes will use the more
- # normal &construct_instance.
- sub construct_class_instance {
- my ($class, $package_name) = @_;
- (defined $package_name && $package_name)
- || confess "You must pass a package name";
- $class = blessed($class) || $class;
- if ($class =~ /^Class::MOP::/) {
- bless {
- '$:pkg' => $package_name,
- '%:attrs' => {}
- } => $class;
- }
- else {
- bless $class->meta->construct_instance(':pkg' => $package_name) => $class
+
+ sub create_anon_class {
+ my ($class, %options) = @_;
+ my $package_name = $ANON_CLASS_PREFIX . ++$ANON_CLASS_SERIAL;
+ return $class->create($package_name, %options);
+ }
+
+ # NOTE:
+ # this will only get called for
+ # anon-classes, 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;
+ no warnings 'uninitialized';
+ return unless $self->name =~ /^$ANON_CLASS_PREFIX/;
+ my ($serial_id) = ($self->name =~ /^$ANON_CLASS_PREFIX(\d+)/);
+ no strict 'refs';
+ foreach my $key (keys %{$ANON_CLASS_PREFIX . $serial_id}) {
+ delete ${$ANON_CLASS_PREFIX . $serial_id}{$key};
}
+ delete ${'main::' . $ANON_CLASS_PREFIX}{$serial_id . '::'};
}
+
}
+# creating classes with MOP ...
+
sub create {
- my ($class, $package_name, $package_version, %options) = @_;
+ my $class = shift;
+ my $package_name = shift;
+
(defined $package_name && $package_name)
|| confess "You must pass a package name";
+
+ (scalar @_ % 2 == 0)
+ || confess "You much pass all parameters as name => value pairs " .
+ "(I found an uneven number of params in \@_)";
+
+ my (%options) = @_;
+
+ (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 = '$package_version';"
- if defined $package_version;
+ $code .= "\$$package_name\:\:VERSION = '" . $options{version} . "';"
+ if exists $options{version};
+ $code .= "\$$package_name\:\:AUTHORITY = '" . $options{authority} . "';"
+ if exists $options{authority};
+
eval $code;
- confess "creation of $package_name failed : $@" if $@;
+ confess "creation of $package_name failed : $@" if $@;
+
my $meta = $class->initialize($package_name);
+
+ $meta->add_method('meta' => sub {
+ $class->initialize(blessed($_[0]) || $_[0]);
+ });
+
$meta->superclasses(@{$options{superclasses}})
if exists $options{superclasses};
# NOTE:
- # process attributes first, so that they can
+ # process attributes first, so that they can
# install accessors, but locally defined methods
# can then overwrite them. It is maybe a little odd, but
# I think this should be the order of things.
@@ -75,114 +276,438 @@ sub create {
foreach my $attr (@{$options{attributes}}) {
$meta->add_attribute($attr);
}
- }
+ }
if (exists $options{methods}) {
foreach my $method_name (keys %{$options{methods}}) {
$meta->add_method($method_name, $options{methods}->{$method_name});
}
- }
+ }
return $meta;
}
-# Instance Construction
+## Attribute readers
+
+# NOTE:
+# 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'} }
+
+# FIXME:
+# this is a prime canidate for conversion to XS
+sub get_method_map {
+ my $self = shift;
+
+ 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;
+
+ 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 == $code;
+
+ my ($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,
+ package_name => $class_name,
+ name => $symbol,
+ );
+ }
+
+ return $map;
+}
+
+# Instance Construction & Cloning
+
+sub new_object {
+ my $class = shift;
+ # NOTE:
+ # we need to protect the integrity of the
+ # Class::MOP::Class singletons here, so we
+ # delegate this to &construct_class_instance
+ # which will deal with the singletons
+ return $class->construct_class_instance(@_)
+ if $class->name->isa('Class::MOP::Class');
+ return $class->construct_instance(@_);
+}
sub construct_instance {
my ($class, %params) = @_;
- my $instance = {};
- foreach my $attr (map { $_->{attribute} } $class->compute_all_applicable_attributes()) {
- # if the attr has an init_arg, use that, otherwise,
- # use the attributes name itself as the init_arg
- my $init_arg = $attr->has_init_arg() ? $attr->init_arg() : $attr->name;
- # try to fetch the init arg from the %params ...
- my $val;
- $val = $params{$init_arg} if exists $params{$init_arg};
- # if nothing was in the %params, we can use the
- # attribute's default value (if it has one)
- $val ||= $attr->default($instance) if $attr->has_default();
- # now add this to the instance structure
- $instance->{$attr->name} = $val;
+ my $meta_instance = $class->get_meta_instance();
+ my $instance = $meta_instance->create_instance();
+ foreach my $attr ($class->compute_all_applicable_attributes()) {
+ $attr->initialize_instance_slot($meta_instance, $instance, \%params);
+ }
+ # NOTE:
+ # this will only work for a HASH instance type
+ if ($class->is_anon_class) {
+ (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
+ # as a reserved slot name, but right now I am
+ # going to keep it here.
+ # my $RESERVED_MOP_SLOT = '__MOP__';
+ $instance->{'__MOP__'} = $class;
}
return $instance;
}
-# Informational
-
-sub name { $_[0]->{'$:pkg'} }
-sub version {
+sub get_meta_instance {
my $self = shift;
- no strict 'refs';
- ${$self->name . '::VERSION'};
+ # NOTE:
+ # just about any fiddling with @ISA or
+ # any fiddling with attributes will
+ # also fiddle with the symbol table
+ # and therefore invalidate the package
+ # cache, in which case we should blow
+ # away the meta-instance cache. Of course
+ # this will invalidate it more often then
+ # is probably needed, but better safe
+ # then sorry.
+ # - SL
+ $self->{'$!_meta_instance'} = undef
+ if defined $self->{'$!_package_cache_flag'} &&
+ $self->{'$!_package_cache_flag'} == Class::MOP::check_package_cache_flag($self->name);
+ $self->{'$!_meta_instance'} ||= $self->instance_metaclass->new(
+ $self,
+ $self->compute_all_applicable_attributes()
+ );
+}
+
+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 . ")";
+ # NOTE:
+ # we need to protect the integrity of the
+ # Class::MOP::Class singletons here, they
+ # should not be cloned.
+ return $instance if $instance->isa('Class::MOP::Class');
+ $class->clone_instance($instance, @_);
+}
+
+sub clone_instance {
+ my ($class, $instance, %params) = @_;
+ (blessed($instance))
+ || confess "You can only clone instances, \$self 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 ( 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;
- no strict 'refs';
+ my $self = shift;
+ my $var_spec = { sigil => '@', type => 'ARRAY', name => 'ISA' };
if (@_) {
my @supers = @_;
- @{$self->name . '::ISA'} = @supers;
+ @{$self->get_package_symbol($var_spec)} = @supers;
+ # NOTE:
+ # we need to check the metaclass
+ # 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->name . '::ISA'};
+ @{$self->get_package_symbol($var_spec)};
+}
+
+sub subclasses {
+ my $self = shift;
+
+ my $super_class = $self->name;
+ 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->isa('This is a test for circular inheritance') }
- # ... and no back to our regularly scheduled program
- (
- $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()
+ } $self->superclasses()
+ );
+ }
}
## Methods
-# un-used right now ...
-sub method_metaclass { 'Class::MOP::Method' }
-
sub add_method {
my ($self, $method_name, $method) = @_;
(defined $method_name && $method_name)
|| confess "You must define a method name";
- # use reftype here to allow for blessed subs ...
- (reftype($method) && reftype($method) eq 'CODE')
- || confess "Your code block must be a CODE reference";
+
+ my $body;
+ if (blessed($method)) {
+ $body = $method->body;
+ if ($method->package_name ne $self->name &&
+ $method->name ne $method_name) {
+ warn "Hello there, got somethig 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 = $method;
+ ('CODE' eq ref($body))
+ || confess "Your code block must be a CODE reference";
+ $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 . '::' . $method_name);
-
- no strict 'refs';
- no warnings 'redefine';
- *{$full_method_name} = subname $full_method_name => $method;
+ $self->add_package_symbol(
+ { sigil => '&', type => 'CODE', name => $method_name },
+ Class::MOP::subname($full_method_name => $body)
+ );
+ $self->update_package_cache_flag;
}
{
+ my $fetch_and_prepare_method = sub {
+ my ($self, $method_name) = @_;
+ # fetch it locally
+ my $method = $self->get_method($method_name);
+ # if we dont have local ...
+ unless ($method) {
+ # try to find the next method
+ $method = $self->find_next_method_by_name($method_name);
+ # die if it does not exist
+ (defined $method)
+ || confess "The method '$method_name' is not found in the inheritance hierarchy for class " . $self->name;
+ # and now make sure to wrap it
+ # even if it is already wrapped
+ # because we need a new sub ref
+ $method = Class::MOP::Method::Wrapped->wrap($method);
+ }
+ else {
+ # now make sure we wrap it properly
+ $method = Class::MOP::Method::Wrapped->wrap($method)
+ unless $method->isa('Class::MOP::Method::Wrapped');
+ }
+ $self->add_method($method_name => $method);
+ return $method;
+ };
- ## private utility functions for has_method
- my $_find_subroutine_package_name = sub { eval { svref_2object($_[0])->GV->STASH->NAME } || '' };
- my $_find_subroutine_name = sub { eval { svref_2object($_[0])->GV->NAME } || '' };
+ sub add_before_method_modifier {
+ my ($self, $method_name, $method_modifier) = @_;
+ (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(
+ Class::MOP::subname(':before' => $method_modifier)
+ );
+ }
- sub has_method {
- my ($self, $method_name) = @_;
+ sub add_after_method_modifier {
+ my ($self, $method_name, $method_modifier) = @_;
(defined $method_name && $method_name)
- || confess "You must define a method name";
-
- my $sub_name = ($self->name . '::' . $method_name);
-
- no strict 'refs';
- return 0 if !defined(&{$sub_name});
- return 0 if $_find_subroutine_package_name->(\&{$sub_name}) ne $self->name &&
- $_find_subroutine_name->(\&{$sub_name}) ne '__ANON__';
- return 1;
+ || confess "You must pass in a method name";
+ my $method = $fetch_and_prepare_method->($self, $method_name);
+ $method->add_after_modifier(
+ Class::MOP::subname(':after' => $method_modifier)
+ );
}
+ sub add_around_method_modifier {
+ my ($self, $method_name, $method_modifier) = @_;
+ (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(
+ Class::MOP::subname(':around' => $method_modifier)
+ );
+ }
+
+ # NOTE:
+ # the methods above used to be named like this:
+ # ${pkg}::${method}:(before|after|around)
+ # but this proved problematic when using one modifier
+ # to wrap multiple methods (something which is likely
+ # to happen pretty regularly IMO). So instead of naming
+ # it like this, I have chosen to just name them purely
+ # with their modifier names, like so:
+ # :(before|after|around)
+ # The fact is that in a stack trace, it will be fairly
+ # evident from the context what method they are attached
+ # to, and so don't need the fully qualified name.
+}
+
+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 : $method);
+ ('CODE' eq ref($body))
+ || confess "Your code block must be a CODE reference";
+
+ $self->add_package_symbol(
+ { sigil => '&', type => 'CODE', name => $method_name } => $body
+ );
+ $self->update_package_cache_flag;
+}
+
+sub has_method {
+ my ($self, $method_name) = @_;
+ (defined $method_name && $method_name)
+ || confess "You must define a method name";
+
+ return 0 unless exists $self->get_method_map->{$method_name};
+ return 1;
}
sub get_method {
@@ -190,50 +715,60 @@ sub get_method {
(defined $method_name && $method_name)
|| confess "You must define a method name";
- no strict 'refs';
- return \&{$self->name . '::' . $method_name}
- if $self->has_method($method_name);
- return; # <- make sure to return undef
+ # NOTE:
+ # I don't really need this here, because
+ # if the method_map is missing a key it
+ # will just return undef for me now
+ # return unless $self->has_method($method_name);
+
+ return $self->get_method_map->{$method_name};
}
sub remove_method {
my ($self, $method_name) = @_;
(defined $method_name && $method_name)
|| confess "You must define a method name";
+
+ my $removed_method = delete $self->get_method_map->{$method_name};
- my $removed_method = $self->get_method($method_name);
+ $self->remove_package_symbol(
+ { sigil => '&', type => 'CODE', name => $method_name }
+ );
- no strict 'refs';
- delete ${$self->name . '::'}{$method_name}
- if defined $removed_method;
-
+ $self->update_package_cache_flag;
+
return $removed_method;
}
sub get_method_list {
my $self = shift;
- no strict 'refs';
- grep { $self->has_method($_) } %{$self->name . '::'};
+ keys %{$self->get_method_map};
+}
+
+sub find_method_by_name {
+ my ($self, $method_name) = @_;
+ (defined $method_name && $method_name)
+ || confess "You must define a method name to find";
+ foreach my $class ($self->linearized_isa) {
+ # fetch the meta-class ...
+ my $meta = $self->initialize($class);
+ return $meta->get_method($method_name)
+ if $meta->has_method($method_name);
+ }
+ return;
}
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()) {
+ foreach my $method_name ($meta->get_method_list()) {
next if exists $seen_method{$method_name};
$seen_method{$method_name}++;
push @methods => {
- name => $method_name,
+ name => $method_name,
class => $class,
code => $meta->get_method($method_name)
};
@@ -245,32 +780,37 @@ sub compute_all_applicable_methods {
sub find_all_methods_by_name {
my ($self, $method_name) = @_;
(defined $method_name && $method_name)
- || confess "You must define a method name to find";
+ || 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 => {
- name => $method_name,
+ name => $method_name,
class => $class,
code => $meta->get_method($method_name)
} if $meta->has_method($method_name);
}
return @methods;
+}
+sub find_next_method_by_name {
+ my ($self, $method_name) = @_;
+ (defined $method_name && $method_name)
+ || confess "You must define a method name to find";
+ my @cpl = $self->linearized_isa;
+ shift @cpl; # discard ourselves
+ foreach my $class (@cpl) {
+ # fetch the meta-class ...
+ my $meta = $self->initialize($class);
+ return $meta->get_method($method_name)
+ if $meta->has_method($method_name);
+ }
+ return;
}
## Attributes
-sub attribute_metaclass { 'Class::MOP::Attribute' }
-
sub add_attribute {
my $self = shift;
# either we have an attribute object already
@@ -278,119 +818,196 @@ sub add_attribute {
my $attribute = blessed($_[0]) ? $_[0] : $self->attribute_metaclass->new(@_);
# make sure it is derived from the correct type though
($attribute->isa('Class::MOP::Attribute'))
- || confess "Your attribute must be an instance of Class::MOP::Attribute (or a subclass)";
+ || confess "Your attribute must be an instance of Class::MOP::Attribute (or a subclass)";
+
+ # first we attach our new attribute
+ # because it might need certain information
+ # about the class which it is attached to
$attribute->attach_to_class($self);
- $attribute->install_accessors();
- $self->{'%:attrs'}->{$attribute->name} = $attribute;
+
+ # then we remove attributes of a conflicting
+ # 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);
+
+ # then onto installing the new accessors
+ $attribute->install_accessors();
+ $self->get_attribute_map->{$attribute->name} = $attribute;
}
sub has_attribute {
my ($self, $attribute_name) = @_;
(defined $attribute_name && $attribute_name)
|| confess "You must define an attribute name";
- exists $self->{'%:attrs'}->{$attribute_name} ? 1 : 0;
-}
+ exists $self->get_attribute_map->{$attribute_name} ? 1 : 0;
+}
sub get_attribute {
my ($self, $attribute_name) = @_;
(defined $attribute_name && $attribute_name)
|| confess "You must define an attribute name";
- return $self->{'%:attrs'}->{$attribute_name}
- if $self->has_attribute($attribute_name);
-}
+ return $self->get_attribute_map->{$attribute_name}
+ # NOTE:
+ # this will return undef anyway, so no need ...
+ # if $self->has_attribute($attribute_name);
+ #return;
+}
sub remove_attribute {
my ($self, $attribute_name) = @_;
(defined $attribute_name && $attribute_name)
|| confess "You must define an attribute name";
- my $removed_attribute = $self->{'%:attrs'}->{$attribute_name};
- delete $self->{'%:attrs'}->{$attribute_name}
- if defined $removed_attribute;
- $removed_attribute->remove_accessors();
- $removed_attribute->detach_from_class();
+ my $removed_attribute = $self->get_attribute_map->{$attribute_name};
+ return unless defined $removed_attribute;
+ delete $self->get_attribute_map->{$attribute_name};
+ $removed_attribute->remove_accessors();
+ $removed_attribute->detach_from_class();
return $removed_attribute;
-}
+}
sub get_attribute_list {
my $self = shift;
- keys %{$self->{'%:attrs'}};
-}
+ keys %{$self->get_attribute_map};
+}
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()) {
+ foreach my $attr_name ($meta->get_attribute_list()) {
next if exists $seen_attr{$attr_name};
$seen_attr{$attr_name}++;
- push @attrs => {
- name => $attr_name,
- class => $class,
- attribute => $meta->get_attribute($attr_name)
- };
+ push @attrs => $meta->get_attribute($attr_name);
}
}
- return @attrs;
+ return @attrs;
}
-# Class attributes
+sub find_attribute_by_name {
+ my ($self, $attr_name) = @_;
+ foreach my $class ($self->linearized_isa) {
+ # fetch the meta-class ...
+ my $meta = $self->initialize($class);
+ return $meta->get_attribute($attr_name)
+ if $meta->has_attribute($attr_name);
+ }
+ return;
+}
-sub add_package_variable {
- my ($self, $variable, $initial_value) = @_;
- (defined $variable && $variable =~ /^[\$\@\%]/)
- || confess "variable name does not have a sigil";
-
- my ($sigil, $name) = ($variable =~ /^(.)(.*)$/);
- if (defined $initial_value) {
- no strict 'refs';
- *{$self->name . '::' . $name} = $initial_value;
+## Class closing
+
+sub is_mutable { 1 }
+sub is_immutable { 0 }
+
+# NOTE:
+# Why I changed this (groditi)
+# - One Metaclass may have many Classes through many Metaclass instances
+# - One Metaclass should only have one Immutable Transformer instance
+# - Each Class may have different Immutabilizing options
+# - Therefore each Metaclass instance may have different Immutabilizing options
+# - We need to store one Immutable Transformer instance per Metaclass
+# - We need to store one set of Immutable Transformer options per Class
+# - Upon make_mutable we may delete the Immutabilizing options
+# - We could clean the immutable Transformer instance when there is no more
+# immutable Classes of that type, but we can also keep it in case
+# another class with this same Metaclass becomes immutable. It is a case
+# of trading of storing an instance to avoid unnecessary instantiations of
+# Immutable Transformers. You may view this as a memory leak, however
+# Because we have few Metaclasses, in practice it seems acceptable
+# - To allow Immutable Transformers instances to be cleaned up we could weaken
+# 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 $transformer = $self->get_immutable_transformer;
+ $transformer->make_metaclass_immutable($self, \%options);
+ $IMMUTABLE_OPTIONS{$self->name} =
+ { %options, IMMUTABLE_TRANSFORMER => $transformer };
+
+ if( exists $options{debug} && $options{debug} ){
+ print STDERR "# of Metaclass options: ", keys %IMMUTABLE_OPTIONS;
+ print STDERR "# of Immutable transformers: ", keys %IMMUTABLE_TRANSFORMERS;
+ }
+
+ 1;
+ }
+
+ sub make_mutable{
+ my $self = shift;
+ return if $self->is_mutable;
+ 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);
+ 1;
}
- else {
- eval $sigil . $self->name . '::' . $name;
- confess "Could not create package variable ($variable) because : $@" if $@;
- }
-}
-
-sub has_package_variable {
- my ($self, $variable) = @_;
- (defined $variable && $variable =~ /^[\$\@\%]/)
- || confess "variable name does not have a sigil";
- my ($sigil, $name) = ($variable =~ /^(.)(.*)$/);
- no strict 'refs';
- defined ${$self->name . '::'}{$name} ? 1 : 0;
-}
-
-sub get_package_variable {
- my ($self, $variable) = @_;
- (defined $variable && $variable =~ /^[\$\@\%]/)
- || confess "variable name does not have a sigil";
- my ($sigil, $name) = ($variable =~ /^(.)(.*)$/);
- no strict 'refs';
- # try to fetch it first,.. see what happens
- eval '\\' . $sigil . $self->name . '::' . $name;
- confess "Could not get the package variable ($variable) because : $@" if $@;
- # if we didn't die, then we can return it
- # NOTE:
- # this is not ideal, better suggestions are welcome
- eval '\\' . $sigil . $self->name . '::' . $name;
}
-sub remove_package_variable {
- my ($self, $variable) = @_;
- (defined $variable && $variable =~ /^[\$\@\%]/)
- || confess "variable name does not have a sigil";
- my ($sigil, $name) = ($variable =~ /^(.)(.*)$/);
- no strict 'refs';
- delete ${$self->name . '::'}{$name};
+sub create_immutable_transformer {
+ my $self = shift;
+ my $class = Class::MOP::Immutable->new($self, {
+ read_only => [qw/superclasses/],
+ cannot_call => [qw/
+ add_method
+ alias_method
+ remove_method
+ add_attribute
+ remove_attribute
+ remove_package_symbol
+ /],
+ 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 $class;
}
1;
@@ -399,49 +1016,48 @@ __END__
=pod
-=head1 NAME
+=head1 NAME
Class::MOP::Class - Class Meta Object
=head1 SYNOPSIS
+ # assuming that class Foo
+ # has been defined, you can
+
# use this for introspection ...
-
- package Foo;
- sub meta { Class::MOP::Class->initialize(__PACKAGE__) }
-
- # elsewhere in the code ...
-
+
# add a method to Foo ...
Foo->meta->add_method('bar' => sub { ... })
-
- # get a list of all the classes searched
- # the method dispatcher in the correct order
+
+ # get a list of all the classes searched
+ # the method dispatcher in the correct order
Foo->meta->class_precedence_list()
-
+
# remove a method from Foo
Foo->meta->remove_method('bar');
-
+
# or use this to actually create classes ...
-
- Class::MOP::Class->create('Bar' => '0.01' => (
+
+ Class::MOP::Class->create('Bar' => (
+ version => '0.01',
superclasses => [ 'Foo' ],
attributes => [
Class::MOP:::Attribute->new('$bar'),
- Class::MOP:::Attribute->new('$baz'),
+ Class::MOP:::Attribute->new('$baz'),
],
methods => {
calculate_bar => sub { ... },
- construct_baz => sub { ... }
+ construct_baz => sub { ... }
}
));
=head1 DESCRIPTION
-This is the largest and currently most complex part of the Perl 5
-meta-object protocol. It controls the introspection and
-manipulation of Perl 5 classes (and it can create them too). The
-best way to understand what this module can do, is to read the
+This is the largest and currently most complex part of the Perl 5
+meta-object protocol. It controls the introspection and
+manipulation of Perl 5 classes (and it can create them too). The
+best way to understand what this module can do, is to read the
documentation for each of it's methods.
=head1 METHODS
@@ -452,89 +1068,198 @@ documentation for each of it's methods.
=item B
-This will return a B instance which is related
-to this class. Thereby allowing B to actually
+This will return a B instance which is related
+to this class. Thereby allowing B to actually
introspect itself.
-As with B, B will actually
-bootstrap this module by installing a number of attribute meta-objects
-into it's metaclass. This will allow this class to reap all the benifits
-of the MOP when subclassing it.
+As with B, B will actually
+bootstrap this module by installing a number of attribute meta-objects
+into it's metaclass. This will allow this class to reap all the benifits
+of the MOP when subclassing it.
=back
=head2 Class construction
-These methods will handle creating B objects,
-which can be used to both create new classes, and analyze
-pre-existing classes.
+These methods will handle creating B objects,
+which can be used to both create new classes, and analyze
+pre-existing classes.
-This module will internally store references to all the instances
-you create with these methods, so that they do not need to be
+This module will internally store references to all the instances
+you create with these methods, so that they do not need to be
created any more than nessecary. Basically, they are singletons.
=over 4
-=item B ?@superclasses,
- methods =E ?%methods,
+=item B ?$version,
+ authority =E ?$authority,
+ superclasses =E ?@superclasses,
+ methods =E ?%methods,
attributes =E ?%attributes)>
-This returns a B object, bringing the specified
-C<$package_name> into existence and adding any of the
-C<$package_version>, C<@superclasses>, C<%methods> and C<%attributes>
-to it.
+This returns a B object, bringing the specified
+C<$package_name> into existence and adding any of the C<$version>,
+C<$authority>, C<@superclasses>, C<%methods> and C<%attributes> to
+it.
+
+=item B ?@superclasses,
+ methods =E ?%methods,
+ attributes =E ?%attributes)>
+
+This will create an anonymous class, it works much like C but
+it does not need a C<$package_name>. Instead it will create a suitably
+unique package name for you to stash things into.
+
+On very important distinction is that anon classes are destroyed once
+the metaclass they are attached to goes out of scope. In the DESTROY
+method, the created package will be removed from the symbol table.
-=item B
+It is also worth noting that any instances created with an anon-class
+will keep a special reference to the anon-meta which will prevent the
+anon-class from going out of scope until all instances of it have also
+been destroyed. This however only works for HASH based instance types,
+as we use a special reserved slot (C<__MOP__>) to store this.
-This initializes and returns returns a B object
+=item B
+
+This initializes and returns returns a B object
for a given a C<$package_name>.
-=item B
+=item B
+
+This removes the old metaclass, and creates a new one in it's place.
+Do B use this unless you really know what you are doing, it could
+very easily make a very large mess of your program.
+
+=item B
-This will construct an instance of B, it is
-here so that we can actually "tie the knot" for B
-to use C once all the bootstrapping is done. This
+This will construct an instance of B, it is
+here so that we can actually "tie the knot" for B
+to use C once all the bootstrapping is done. This
method is used internally by C and should never be called
from outside of that method really.
-=back
+=item B
+
+This method is called as the very last thing in the
+C method. This will check that the
+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.
-=head2 Object instance construction
+=item B
-This method is used to construct an instace structure suitable for
-C-ing into your package of choice. It works in conjunction
-with the Attribute protocol to collect all applicable attributes.
+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.
-This method is B, it is up to you whether you want
-to use it or not.
+=item B
+
+Clears the package cache flag to announce to the internals that we need
+to rebuild the method map.
+
+=back
+
+=head2 Object instance construction and cloning
+
+These methods are B, it is up to you whether you want
+to use them or not.
=over 4
+=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
+blessing it into the appropriate package as well. Ideally your class
+would call a C this method like so:
+
+ sub MyClass::new {
+ my ($class, %param) = @_;
+ $class->meta->new_object(%params);
+ }
+
=item B
-This will construct and instance using a HASH ref as storage
-(currently only HASH references are supported). This will collect all
-the applicable attributes and layout out the fields in the HASH ref,
-it will then initialize them using either use the corresponding key
-in C<%params> or any default value or initializer found in the
+This method is used to construct an instance structure suitable for
+C-ing into your package of choice. It works in conjunction
+with the Attribute protocol to collect all applicable attributes.
+
+This will construct and instance using a HASH ref as storage
+(currently only HASH references are supported). This will collect all
+the applicable attributes and layout out the fields in the HASH ref,
+it will then initialize them using either use the corresponding key
+in C<%params> or any default value or initializer found in the
attribute meta-object.
+=item B
+
+This is a convience method for cloning an object instance, then
+blessing it into the appropriate package. This method will call
+C, which performs a shallow copy of the object,
+see that methods documentation for more details. Ideally your
+class would call a C this method like so:
+
+ sub MyClass::clone {
+ my ($self, %param) = @_;
+ $self->meta->clone_object($self, %params);
+ }
+
+=item B
+
+This method is a compliment of C (which means if
+you override C, you need to override this one too),
+and clones the instance shallowly.
+
+The cloned structure returned is (like with C) an
+unCed HASH reference, it is your responsibility to then bless
+this cloned structure into the right class (which C will
+do for you).
+
+As of 0.11, this method will clone the C<$instance> structure shallowly,
+as opposed to the deep cloning implemented in prior versions. After much
+thought, research and discussion, I have decided that anything but basic
+shallow cloning is outside the scope of the meta-object protocol. I
+think Yuval "nothingmuch" Kogman put it best when he said that cloning
+is too I to be part of the MOP.
+
+=item B
+
+This will change the class of C<$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
+=head2 Informational
+
+These are a few predicate methods for asking information about the class.
=over 4
-=item B
+=item B
+
+This returns true if the class is a C created anon class.
-This is a read-only attribute which returns the package name for the
-given B instance.
+=item B
-=item B
+This returns true if the class is still mutable.
-This is a read-only attribute which returns the C<$VERSION> of the
-package for the given B instance.
+=item B
+
+This returns true if the class has been made immutable.
=back
@@ -544,22 +1269,24 @@ package for the given B instance.
=item B
-This is a read-write attribute which represents the superclass
+This is a read-write attribute which represents the superclass
relationships of the class the B instance is
associated with. Basically, it can get and set the C<@ISA> for you.
-B
-Perl will occasionally perform some C<@ISA> and method caching, if
-you decide to change your superclass relationship at runtime (which
-is quite insane and very much not recommened), then you should be
-aware of this and the fact that this module does not make any
-attempt to address this issue.
-
=item B
-This computes the a list of all the class's ancestors in the same order
-in which method dispatch will be done. This is similair to
-what B does, but we don't remove duplicate names.
+This computes the a list of all the class's ancestors in the same order
+in which method dispatch will be done. This is similair to what
+B does, but we don't remove duplicate names.
+
+=item B
+
+This returns a list based on C but with all
+duplicates removed.
+
+=item B
+
+This returns a list of subclasses for this class.
=back
@@ -567,198 +1294,344 @@ what B does, but we don't remove duplicate names.
=over 4
+=item B
+
+Returns a HASH ref of name to CODE reference mapping for this class.
+
=item B
+Returns the class name of the method metaclass, see L
+for more information on the method metaclasses.
+
=item B
-This will take a C<$method_name> and CODE reference to that
-C<$method> and install it into the class's package.
+This will take a C<$method_name> and CODE reference to that
+C<$method> and install it into the class's package.
-B:
-This does absolutely nothing special to C<$method>
-other than use B to make sure it is tagged with the
-correct name, and therefore show up correctly in stack traces and
+B:
+This does absolutely nothing special to C<$method>
+other than use B to make sure it is tagged with the
+correct name, and therefore show up correctly in stack traces and
such.
+=item B
+
+This will take a C<$method_name> and CODE reference to that
+C<$method> and alias the method into the class's package.
+
+B:
+Unlike C, this will B try to name the
+C<$method> using B, it only aliases the method in
+the class's package.
+
=item B
-This just provides a simple way to check if the class implements
-a specific C<$method_name>. It will I however, attempt to check
+This just provides a simple way to check if the class implements
+a specific C<$method_name>. It will I however, attempt to check
if the class inherits the method (use C for that).
-This will correctly handle functions defined outside of the package
+This will correctly handle functions defined outside of the package
that use a fully qualified name (C).
-This will correctly handle functions renamed with B and
-installed using the symbol tables. However, if you are naming the
-subroutine outside of the package scope, you must use the fully
-qualified name, including the package name, for C to
-correctly identify it.
+This will correctly handle functions renamed with B and
+installed using the symbol tables. However, if you are naming the
+subroutine outside of the package scope, you must use the fully
+qualified name, including the package name, for C to
+correctly identify it.
-This will attempt to correctly ignore functions imported from other
-packages using B. It breaks down if the function imported
-is an C<__ANON__> sub (such as with C