X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FClass%2FMOP.pm;h=5066d3d616873dd978defda58e755c2d0d62eeb4;hb=28fa06b5d932b8a2f9bc1b6b394893c0d7c9efac;hp=1e99bdfcc4478623c3fd1cfb2c5d0e57079773e1;hpb=ebce55398177423965f0582686a812fe79e20d70;p=gitmo%2FClass-MOP.git diff --git a/lib/Class/MOP.pm b/lib/Class/MOP.pm index 1e99bdf..5066d3d 100644 --- a/lib/Class/MOP.pm +++ b/lib/Class/MOP.pm @@ -4,10 +4,13 @@ package Class::MOP; use strict; use warnings; +use 5.008; + use MRO::Compat; use Carp 'confess'; -use Scalar::Util 'weaken'; +use Scalar::Util 'weaken', 'reftype'; + use Class::MOP::Class; use Class::MOP::Attribute; @@ -16,88 +19,64 @@ use Class::MOP::Method; use Class::MOP::Immutable; BEGIN { - - our $VERSION = '0.62'; - our $AUTHORITY = 'cpan:STEVAN'; - *IS_RUNNING_ON_5_10 = ($] < 5.009_005) ? sub () { 0 } : sub () { 1 }; - # NOTE: - # we may not use this yet, but once - # the get_code_info XS gets merged - # upstream to it, we will always use - # it. But for now it is just kinda - # extra overhead. - # - SL + *HAVE_ISAREV = defined(&mro::get_isarev) + ? sub () { 1 } + : sub () { 1 }; + + # this is either part of core or set up appropriately by MRO::Compat + *check_package_cache_flag = \&mro::get_pkg_gen; +} + +our $VERSION = '0.78'; +our $XS_VERSION = $VERSION; +$VERSION = eval $VERSION; +our $AUTHORITY = 'cpan:STEVAN'; + +_try_load_xs() or _load_pure_perl(); + +sub _try_load_xs { + return if $ENV{CLASS_MOP_NO_XS}; + + my $e = do { + local $@; + eval { + require XSLoader; + # just doing this - no warnings 'redefine' - doesn't work + # for some reason + local $^W = 0; + __PACKAGE__->XSLoader::load($XS_VERSION); + + require Sub::Name; + Sub::Name->import(qw(subname)); + + require Devel::GlobalDestruction; + Devel::GlobalDestruction->import("in_global_destruction"); + + *USING_XS = sub () { 1 }; + }; + $@; + }; + + die $e if $e && $e !~ /object version|loadable object/; + + return $e ? 0 : 1; +} + +sub _load_pure_perl { require Sub::Identify; - - # stash these for a sec, and see how things go - my $_PP_subname = sub { $_[1] }; - my $_PP_get_code_info = \&Sub::Identify::get_code_info; - - if ($ENV{CLASS_MOP_NO_XS}) { - # NOTE: - # this is if you really want things - # to be slow, then you can force the - # no-XS rule this way, otherwise we - # make an effort to load as much of - # the XS as possible. - # - SL - no warnings 'prototype', 'redefine'; - - unless (IS_RUNNING_ON_5_10()) { - # get this from MRO::Compat ... - *check_package_cache_flag = \&MRO::Compat::__get_pkg_gen_pp; - } - else { - # NOTE: - # but if we are running 5.10 - # there is no need to use the - # Pure Perl version since we - # can use the built in mro - # version instead. - # - SL - *check_package_cache_flag = \&mro::get_pkg_gen; - } - # our own version of Sub::Name - *subname = $_PP_subname; - # and the Sub::Identify version of the get_code_info - *get_code_info = $_PP_get_code_info; - } - else { - # now try our best to get as much - # of the XS loaded as possible - { - local $@; - eval { - require XSLoader; - XSLoader::load( 'Class::MOP', $VERSION ); - }; - die $@ if $@ && $@ !~ /object version|loadable object/; - - # okay, so the XS failed to load, so - # use the pure perl one instead. - *get_code_info = $_PP_get_code_info if $@; - } - - # get it from MRO::Compat - *check_package_cache_flag = \&mro::get_pkg_gen; - - # now try and load the Sub::Name - # module and use that as a means - # for naming our CVs, if not, we - # use the workaround instead. - if ( eval { require Sub::Name } ) { - *subname = \&Sub::Name::subname; - } - else { - *subname = $_PP_subname; - } - } + Sub::Identify->import('get_code_info'); + + *subname = sub { $_[1] }; + *in_global_destruction = sub () { !1 }; + + *USING_XS = sub () { 0 }; } + { # Metaclasses are singletons, so we cache them here. # there is no need to worry about destruction though @@ -123,33 +102,80 @@ BEGIN { # because I don't yet see a good reason to do so. } -sub load_class { - my $class = shift; +sub load_first_existing_class { + my @classes = @_ + or return; + + foreach my $class (@classes) { + unless ( _is_valid_class_name($class) ) { + my $display = defined($class) ? $class : 'undef'; + confess "Invalid class name ($display)"; + } + } - if (ref($class) || !defined($class) || !length($class)) { - my $display = defined($class) ? $class : 'undef'; - confess "Invalid class name ($display)"; + my $found; + my %exceptions; + for my $class (@classes) { + my $e = _try_load_one_class($class); + + if ($e) { + $exceptions{$class} = $e; + } + else { + $found = $class; + last; + } } - # see if this is already - # loaded in the symbol table - return 1 if is_class_loaded($class); - # otherwise require it ... + return $found if $found; + + confess join( + "\n", + map { + sprintf( + "Could not load class (%s) because : %s", $_, + $exceptions{$_} + ) + } @classes + ); +} + +sub _try_load_one_class { + my $class = shift; + + return if is_class_loaded($class); + my $file = $class . '.pm'; $file =~ s{::}{/}g; - eval { CORE::require($file) }; - confess "Could not load class ($class) because : $@" if $@; - unless (does_metaclass_exist($class)) { - eval { Class::MOP::Class->initialize($class) }; - confess "Could not initialize class ($class) because : $@" if $@; - } - 1; # return true if it worked + + return do { + local $@; + eval { require($file) }; + $@; + }; +} + +sub load_class { + my $class = load_first_existing_class($_[0]); + return get_metaclass_by_name($class) || $class; +} + +sub _is_valid_class_name { + my $class = shift; + + return 0 if ref($class); + return 0 unless defined($class); + return 0 unless length($class); + + return 1 if $class =~ /^\w+(?:::\w+)*$/; + + return 0; } sub is_class_loaded { my $class = shift; - return 0 if ref($class) || !defined($class) || !length($class); + return 0 unless _is_valid_class_name($class); # walk the symbol table tree to avoid autovififying # \*{${main::}{"Foo::"}} == \*main::Foo:: @@ -160,9 +186,19 @@ sub is_class_loaded { $pack = \*{${$$pack}{"${part}::"}}; } - # check for $VERSION or @ISA - return 1 if exists ${$$pack}{VERSION} - && defined *{${$$pack}{VERSION}}{SCALAR}; + # We used to check in the package stash, but it turns out that + # *{${$$package}{VERSION}{SCALAR}} can end up pointing to a + # reference to undef. It looks + + my $version = do { + no strict 'refs'; + ${$class . '::VERSION'}; + }; + + return 1 if ! ref $version && defined $version; + # Sometimes $VERSION ends up as a reference to undef (weird) + return 1 if ref $version && reftype $version eq 'SCALAR' && defined ${$version}; + return 1 if exists ${$$pack}{ISA} && defined *{${$$pack}{ISA}}{ARRAY}; @@ -213,7 +249,7 @@ sub is_class_loaded { ## Class::MOP::Package Class::MOP::Package->meta->add_attribute( - Class::MOP::Attribute->new('$!package' => ( + Class::MOP::Attribute->new('package' => ( reader => { # NOTE: we need to do this in order # for the instance meta-object to @@ -223,12 +259,11 @@ Class::MOP::Package->meta->add_attribute( # rather than re-produce it here 'name' => \&Class::MOP::Package::name }, - init_arg => 'package', )) ); Class::MOP::Package->meta->add_attribute( - Class::MOP::Attribute->new('%!namespace' => ( + Class::MOP::Attribute->new('namespace' => ( reader => { # NOTE: # we just alias the original method @@ -240,15 +275,6 @@ Class::MOP::Package->meta->add_attribute( )) ); -# NOTE: -# use the metaclass to construct the meta-package -# which is a superclass of the metaclass itself :P -Class::MOP::Package->meta->add_method('initialize' => sub { - my $class = shift; - my $package_name = shift; - $class->meta->new_object('package' => $package_name, @_); -}); - ## -------------------------------------------------------- ## Class::MOP::Module @@ -263,7 +289,7 @@ Class::MOP::Package->meta->add_method('initialize' => sub { # the metaclass, isn't abstraction great :) Class::MOP::Module->meta->add_attribute( - Class::MOP::Attribute->new('$!version' => ( + Class::MOP::Attribute->new('version' => ( reader => { # NOTE: # we just alias the original method @@ -282,7 +308,7 @@ Class::MOP::Module->meta->add_attribute( # well. Class::MOP::Module->meta->add_attribute( - Class::MOP::Attribute->new('$!authority' => ( + Class::MOP::Attribute->new('authority' => ( reader => { # NOTE: # we just alias the original method @@ -298,7 +324,7 @@ Class::MOP::Module->meta->add_attribute( ## Class::MOP::Class Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('%!attributes' => ( + Class::MOP::Attribute->new('attributes' => ( reader => { # NOTE: we need to do this in order # for the instance meta-object to @@ -308,14 +334,12 @@ Class::MOP::Class->meta->add_attribute( # rather than re-produce it here 'get_attribute_map' => \&Class::MOP::Class::get_attribute_map }, - init_arg => 'attributes', default => sub { {} } )) ); Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('%!methods' => ( - init_arg => 'methods', + Class::MOP::Attribute->new('methods' => ( reader => { # NOTE: # we just alias the original method @@ -327,7 +351,7 @@ Class::MOP::Class->meta->add_attribute( ); Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('@!superclasses' => ( + Class::MOP::Attribute->new('superclasses' => ( accessor => { # NOTE: # we just alias the original method @@ -340,33 +364,43 @@ Class::MOP::Class->meta->add_attribute( ); Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('$!attribute_metaclass' => ( + Class::MOP::Attribute->new('attribute_metaclass' => ( reader => { # NOTE: # we just alias the original method # rather than re-produce it here 'attribute_metaclass' => \&Class::MOP::Class::attribute_metaclass }, - init_arg => 'attribute_metaclass', default => 'Class::MOP::Attribute', )) ); Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('$!method_metaclass' => ( + Class::MOP::Attribute->new('method_metaclass' => ( reader => { # NOTE: # we just alias the original method # rather than re-produce it here 'method_metaclass' => \&Class::MOP::Class::method_metaclass }, - init_arg => 'method_metaclass', default => 'Class::MOP::Method', )) ); Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('$!instance_metaclass' => ( + Class::MOP::Attribute->new('wrapped_method_metaclass' => ( + reader => { + # NOTE: + # we just alias the original method + # rather than re-produce it here + 'wrapped_method_metaclass' => \&Class::MOP::Class::wrapped_method_metaclass + }, + default => 'Class::MOP::Method::Wrapped', + )) +); + +Class::MOP::Class->meta->add_attribute( + Class::MOP::Attribute->new('instance_metaclass' => ( reader => { # NOTE: we need to do this in order # for the instance meta-object to @@ -376,7 +410,6 @@ Class::MOP::Class->meta->add_attribute( # rather than re-produce it here 'instance_metaclass' => \&Class::MOP::Class::instance_metaclass }, - init_arg => 'instance_metaclass', default => 'Class::MOP::Instance', )) ); @@ -391,8 +424,7 @@ Class::MOP::Class->meta->add_attribute( ## Class::MOP::Attribute Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!name' => ( - init_arg => 'name', + Class::MOP::Attribute->new('name' => ( reader => { # NOTE: we need to do this in order # for the instance meta-object to @@ -406,8 +438,7 @@ Class::MOP::Attribute->meta->add_attribute( ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!associated_class' => ( - init_arg => 'associated_class', + Class::MOP::Attribute->new('associated_class' => ( reader => { # NOTE: we need to do this in order # for the instance meta-object to @@ -421,115 +452,81 @@ Class::MOP::Attribute->meta->add_attribute( ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!accessor' => ( - init_arg => 'accessor', + Class::MOP::Attribute->new('accessor' => ( reader => { 'accessor' => \&Class::MOP::Attribute::accessor }, predicate => { 'has_accessor' => \&Class::MOP::Attribute::has_accessor }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!reader' => ( - init_arg => 'reader', + Class::MOP::Attribute->new('reader' => ( reader => { 'reader' => \&Class::MOP::Attribute::reader }, predicate => { 'has_reader' => \&Class::MOP::Attribute::has_reader }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!initializer' => ( - init_arg => 'initializer', + Class::MOP::Attribute->new('initializer' => ( reader => { 'initializer' => \&Class::MOP::Attribute::initializer }, predicate => { 'has_initializer' => \&Class::MOP::Attribute::has_initializer }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!writer' => ( - init_arg => 'writer', + Class::MOP::Attribute->new('definition_context' => ( + reader => { 'definition_context' => \&Class::MOP::Attribute::definition_context }, + )) +); + +Class::MOP::Attribute->meta->add_attribute( + Class::MOP::Attribute->new('writer' => ( reader => { 'writer' => \&Class::MOP::Attribute::writer }, predicate => { 'has_writer' => \&Class::MOP::Attribute::has_writer }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!predicate' => ( - init_arg => 'predicate', + Class::MOP::Attribute->new('predicate' => ( reader => { 'predicate' => \&Class::MOP::Attribute::predicate }, predicate => { 'has_predicate' => \&Class::MOP::Attribute::has_predicate }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!clearer' => ( - init_arg => 'clearer', + Class::MOP::Attribute->new('clearer' => ( reader => { 'clearer' => \&Class::MOP::Attribute::clearer }, predicate => { 'has_clearer' => \&Class::MOP::Attribute::has_clearer }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!builder' => ( - init_arg => 'builder', + Class::MOP::Attribute->new('builder' => ( reader => { 'builder' => \&Class::MOP::Attribute::builder }, predicate => { 'has_builder' => \&Class::MOP::Attribute::has_builder }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!init_arg' => ( - init_arg => 'init_arg', + Class::MOP::Attribute->new('init_arg' => ( reader => { 'init_arg' => \&Class::MOP::Attribute::init_arg }, predicate => { 'has_init_arg' => \&Class::MOP::Attribute::has_init_arg }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!default' => ( - init_arg => 'default', + Class::MOP::Attribute->new('default' => ( # default has a custom 'reader' method ... predicate => { 'has_default' => \&Class::MOP::Attribute::has_default }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('@!associated_methods' => ( - init_arg => 'associated_methods', + Class::MOP::Attribute->new('associated_methods' => ( reader => { 'associated_methods' => \&Class::MOP::Attribute::associated_methods }, default => sub { [] } )) ); -# NOTE: (meta-circularity) -# This should be one of the last things done -# it will "tie the knot" with Class::MOP::Attribute -# so that it uses the attributes meta-objects -# to construct itself. -Class::MOP::Attribute->meta->add_method('new' => sub { - my $class = shift; - my $name = shift; - my %options = @_; - - (defined $name && $name) - || confess "You must provide a name for the attribute"; - $options{init_arg} = $name - if not exists $options{init_arg}; - - if(exists $options{builder}){ - confess("builder must be a defined scalar value which is a method name") - if ref $options{builder} || !(defined $options{builder}); - confess("Setting both default and builder is not allowed.") - if exists $options{default}; - } else { - (Class::MOP::Attribute::is_default_a_coderef(\%options)) - || confess("References are not allowed as default values, you must ". - "wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])") - if exists $options{default} && ref $options{default}; - } - # return the new object - $class->meta->new_object(name => $name, %options); -}); - Class::MOP::Attribute->meta->add_method('clone' => sub { my $self = shift; $self->meta->clone_object($self, @_); @@ -537,46 +534,42 @@ Class::MOP::Attribute->meta->add_method('clone' => sub { ## -------------------------------------------------------- ## Class::MOP::Method - Class::MOP::Method->meta->add_attribute( - Class::MOP::Attribute->new('&!body' => ( - init_arg => 'body', + Class::MOP::Attribute->new('body' => ( reader => { 'body' => \&Class::MOP::Method::body }, )) ); Class::MOP::Method->meta->add_attribute( - Class::MOP::Attribute->new('$!package_name' => ( - init_arg => 'package_name', + Class::MOP::Attribute->new('associated_metaclass' => ( + reader => { 'associated_metaclass' => \&Class::MOP::Method::associated_metaclass }, + )) +); + +Class::MOP::Method->meta->add_attribute( + Class::MOP::Attribute->new('package_name' => ( reader => { 'package_name' => \&Class::MOP::Method::package_name }, )) ); Class::MOP::Method->meta->add_attribute( - Class::MOP::Attribute->new('$!name' => ( - init_arg => 'name', + Class::MOP::Attribute->new('name' => ( reader => { 'name' => \&Class::MOP::Method::name }, )) ); -Class::MOP::Method->meta->add_method('wrap' => sub { - my $class = shift; - my $code = shift; - my %options = @_; - - ('CODE' eq ref($code)) - || confess "You must supply a CODE reference to bless, not (" . ($code || 'undef') . ")"; - - ($options{package_name} && $options{name}) - || confess "You must supply the package_name and name parameters"; - - # return the new object - $class->meta->new_object(body => $code, %options); -}); +Class::MOP::Method->meta->add_attribute( + Class::MOP::Attribute->new('original_method' => ( + reader => { 'original_method' => \&Class::MOP::Method::original_method }, + writer => { '_set_original_method' => \&Class::MOP::Method::_set_original_method }, + )) +); Class::MOP::Method->meta->add_method('clone' => sub { my $self = shift; - $self->meta->clone_object($self, @_); + my $clone = $self->meta->clone_object($self, @_); + $clone->_set_original_method($self); + return $clone; }); ## -------------------------------------------------------- @@ -588,35 +581,30 @@ Class::MOP::Method->meta->add_method('clone' => sub { # practices of attributes, but we put # it here for completeness Class::MOP::Method::Wrapped->meta->add_attribute( - Class::MOP::Attribute->new('%!modifier_table') + Class::MOP::Attribute->new('modifier_table') ); ## -------------------------------------------------------- ## Class::MOP::Method::Generated Class::MOP::Method::Generated->meta->add_attribute( - Class::MOP::Attribute->new('$!is_inline' => ( - init_arg => 'is_inline', + Class::MOP::Attribute->new('is_inline' => ( reader => { 'is_inline' => \&Class::MOP::Method::Generated::is_inline }, default => 0, )) ); -Class::MOP::Method::Generated->meta->add_method('new' => sub { - my ($class, %options) = @_; - ($options{package_name} && $options{name}) - || confess "You must supply the package_name and name parameters"; - my $self = $class->meta->new_object(%options); - $self->initialize_body; - $self; -}); +Class::MOP::Method::Generated->meta->add_attribute( + Class::MOP::Attribute->new('definition_context' => ( + reader => { 'definition_context' => \&Class::MOP::Method::Generated::definition_context }, + )) +); ## -------------------------------------------------------- ## Class::MOP::Method::Accessor Class::MOP::Method::Accessor->meta->add_attribute( - Class::MOP::Attribute->new('$!attribute' => ( - init_arg => 'attribute', + Class::MOP::Attribute->new('attribute' => ( reader => { 'associated_attribute' => \&Class::MOP::Method::Accessor::associated_attribute }, @@ -624,48 +612,16 @@ Class::MOP::Method::Accessor->meta->add_attribute( ); Class::MOP::Method::Accessor->meta->add_attribute( - Class::MOP::Attribute->new('$!accessor_type' => ( - init_arg => 'accessor_type', + Class::MOP::Attribute->new('accessor_type' => ( reader => { 'accessor_type' => \&Class::MOP::Method::Accessor::accessor_type }, )) ); -Class::MOP::Method::Accessor->meta->add_method('new' => sub { - my $class = shift; - my %options = @_; - - (exists $options{attribute}) - || confess "You must supply an attribute to construct with"; - - (exists $options{accessor_type}) - || confess "You must supply an accessor_type to construct with"; - - (Scalar::Util::blessed($options{attribute}) && $options{attribute}->isa('Class::MOP::Attribute')) - || confess "You must supply an attribute which is a 'Class::MOP::Attribute' instance"; - - ($options{package_name} && $options{name}) - || confess "You must supply the package_name and name parameters"; - - # return the new object - my $self = $class->meta->new_object(%options); - - # we don't want this creating - # a cycle in the code, if not - # needed - Scalar::Util::weaken($self->{'$!attribute'}); - - $self->initialize_body; - - $self; -}); - - ## -------------------------------------------------------- ## Class::MOP::Method::Constructor Class::MOP::Method::Constructor->meta->add_attribute( - Class::MOP::Attribute->new('%!options' => ( - init_arg => 'options', + Class::MOP::Attribute->new('options' => ( reader => { 'options' => \&Class::MOP::Method::Constructor::options }, @@ -674,38 +630,14 @@ Class::MOP::Method::Constructor->meta->add_attribute( ); Class::MOP::Method::Constructor->meta->add_attribute( - Class::MOP::Attribute->new('$!associated_metaclass' => ( - init_arg => 'metaclass', + Class::MOP::Attribute->new('associated_metaclass' => ( + init_arg => "metaclass", # FIXME alias and rename reader => { 'associated_metaclass' => \&Class::MOP::Method::Constructor::associated_metaclass }, )) ); -Class::MOP::Method::Constructor->meta->add_method('new' => sub { - my $class = shift; - my %options = @_; - - (Scalar::Util::blessed $options{metaclass} && $options{metaclass}->isa('Class::MOP::Class')) - || confess "You must pass a metaclass instance if you want to inline" - if $options{is_inline}; - - ($options{package_name} && $options{name}) - || confess "You must supply the package_name and name parameters"; - - # return the new object - my $self = $class->meta->new_object(%options); - - # we don't want this creating - # a cycle in the code, if not - # needed - Scalar::Util::weaken($self->{'$!associated_metaclass'}); - - $self->initialize_body; - - $self; -}); - ## -------------------------------------------------------- ## Class::MOP::Instance @@ -714,26 +646,57 @@ Class::MOP::Method::Constructor->meta->add_method('new' => sub { # included for completeness Class::MOP::Instance->meta->add_attribute( - Class::MOP::Attribute->new('$!meta') + Class::MOP::Attribute->new('associated_metaclass', + reader => { associated_metaclass => \&Class::MOP::Instance::associated_metaclass }, + ), +); + +Class::MOP::Instance->meta->add_attribute( + Class::MOP::Attribute->new('_class_name', + init_arg => undef, + reader => { _class_name => \&Class::MOP::Instance::_class_name }, + #lazy => 1, # not yet supported by Class::MOP but out our version does it anyway + #default => sub { $_[0]->associated_metaclass->name }, + ), +); + +Class::MOP::Instance->meta->add_attribute( + Class::MOP::Attribute->new('attributes', + reader => { attributes => \&Class::MOP::Instance::get_all_attributes }, + ), +); + +Class::MOP::Instance->meta->add_attribute( + Class::MOP::Attribute->new('slots', + reader => { slots => \&Class::MOP::Instance::slots }, + ), ); Class::MOP::Instance->meta->add_attribute( - Class::MOP::Attribute->new('@!slots') + Class::MOP::Attribute->new('slot_hash', + reader => { slot_hash => \&Class::MOP::Instance::slot_hash }, + ), ); + +# we need the meta instance of the meta instance to be created now, in order +# for the constructor to be able to use it +Class::MOP::Instance->meta->get_meta_instance; + +# pretend the add_method never happenned. it hasn't yet affected anything +undef Class::MOP::Instance->meta->{_package_cache_flag}; + ## -------------------------------------------------------- ## Now close all the Class::MOP::* classes -# NOTE: -# we don't need to inline the -# constructors or the accessors -# this only lengthens the compile -# time of the MOP, and gives us -# no actual benefits. +# NOTE: we don't need to inline the the accessors this only lengthens +# the compile time of the MOP, and gives us no actual benefits. $_->meta->make_immutable( - inline_constructor => 0, - inline_accessors => 0, + inline_constructor => 1, + replace_constructor => 1, + constructor_name => "_new", + inline_accessors => 0, ) for qw/ Class::MOP::Package Class::MOP::Module @@ -947,10 +910,21 @@ We set this constant depending on what version perl we are on, this allows us to take advantage of new 5.10 features and stay backwards compat. +=item I + +Whether or not C provides C, a much faster way to get all the +subclasses of a certain class. + +=item I + +Whether or not the running C is using its XS version. + =back =head2 Utility functions +Note that these are all called as B. + =over 4 =item B @@ -971,6 +945,8 @@ is probably correct about 99% of the time. =item B +B + This will return an integer that is managed by C to determine if a module's symbol table has been altered. @@ -980,6 +956,8 @@ which is not package specific. =item B +B + This function returns two values, the name of the package the C<$code> is from and the name of the C<$code> itself. This is used by several elements of the MOP to detemine where a given C<$code> reference is from. @@ -992,36 +970,55 @@ If possible, we will load the L module and this will function as C does, otherwise it will just return the C<$code> argument. +=item B + +B + +If L is available, this returns true under global +destruction. + +Otherwise it's a constant returning false. + +=item B + +B + +Given a list of class names, this function will attempt to load each +one in turn. + +If it finds a class it can load, it will return that class' name. +If none of the classes can be loaded, it will throw an exception. + =back =head2 Metaclass cache functions -Class::MOP holds a cache of metaclasses, the following are functions +Class::MOP holds a cache of metaclasses. The following are functions (B) which can be used to access that cache. It is not -recommended that you mess with this, bad things could happen. But if -you are brave and willing to risk it, go for it. +recommended that you mess with these. Bad things could happen, but if +you are brave and willing to risk it: go for it! =over 4 =item B -This will return an hash of all the metaclass instances that have -been cached by B keyed by the package name. +This will return a hash of all the metaclass instances that have +been cached by B, keyed by the package name. =item B -This will return an array of all the metaclass instances that have +This will return a list of all the metaclass instances that have been cached by B. =item B -This will return an array of all the metaclass names that have +This will return a list of all the metaclass names that have been cached by B. =item B -This will return a cached B instance of nothing -if no metaclass exist by that C<$name>. +This will return a cached B instance, or nothing +if no metaclass exists with that C<$name>. =item B @@ -1029,18 +1026,19 @@ This will store a metaclass in the cache at the supplied C<$key>. =item B -In rare cases it is desireable to store a weakened reference in -the metaclass cache. This function will weaken the reference to -the metaclass stored in C<$name>. +In rare cases (e.g. anonymous metaclasses) it is desirable to +store a weakened reference in the metaclass cache. This +function will weaken the reference to the metaclass stored +in C<$name>. =item B This will return true of there exists a metaclass stored in the -C<$name> key and return false otherwise. +C<$name> key, and return false otherwise. =item B -This will remove a the metaclass stored in the C<$name> key. +This will remove the metaclass stored in the C<$name> key. =back @@ -1147,6 +1145,8 @@ B Brandon (blblack) Black +Florian (rafl) Ragwitz + Guillermo (groditi) Roditi Matt (mst) Trout