use strict;
use warnings;
+use 5.008;
+
use MRO::Compat;
use Carp 'confess';
use Scalar::Util 'weaken';
-use Sub::Identify 'get_code_info';
-
-BEGIN {
- local $@;
- eval {
- require Sub::Name;
- Sub::Name->import(qw(subname));
- 1
- } or eval 'sub subname { $_[1] }';
-
- # this is either part of core or set up appropriately by MRO::Compat
- *check_package_cache_flag = \&mro::get_pkg_gen;
-
- eval {
- require Devel::GlobalDestruction;
- Devel::GlobalDestruction->import("in_global_destruction");
- 1;
- } or *in_global_destruction = sub () { '' };
-}
-
use Class::MOP::Class;
use Class::MOP::Attribute;
*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 = '0.65';
+our $VERSION = '0.75';
+our $XS_VERSION = $VERSION;
+$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
# after that everything is loaded, if we're allowed try to load faster XS
# versions of various things
-unless ($ENV{CLASS_MOP_NO_XS}) {
+_try_load_xs() or _load_pure_perl();
+
+sub _try_load_xs {
+ return if $ENV{CLASS_MOP_NO_XS};
+
my $e = do {
local $@;
eval {
require XSLoader;
- __PACKAGE__->XSLoader::load($VERSION);
+ # 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");
};
$@;
};
die $e if $e && $e !~ /object version|loadable object/;
+
+ return $e ? 0 : 1;
+}
+
+sub _load_pure_perl {
+ require Sub::Identify;
+ Sub::Identify->import('get_code_info');
+
+ *subname = sub { $_[1] };
+ *in_global_destruction = sub () { !1 }
}
+
{
# Metaclasses are singletons, so we cache them here.
# there is no need to worry about destruction though
# because I don't yet see a good reason to do so.
}
-sub load_class {
- my $class = shift;
+sub load_first_existing_class {
+ my @classes = @_
+ or return;
- if (ref($class) || !defined($class) || !length($class)) {
- my $display = defined($class) ? $class : 'undef';
- confess "Invalid class name ($display)";
+ foreach my $class (@classes) {
+ unless ( _is_valid_class_name($class) ) {
+ my $display = defined($class) ? $class : 'undef';
+ confess "Invalid class name ($display)";
+ }
}
- # if the class is not already loaded in the symbol table..
- unless (is_class_loaded($class)) {
- # require it
- my $file = $class . '.pm';
- $file =~ s{::}{/}g;
- my $e = do { local $@; eval { require($file) }; $@ };
- confess "Could not load class ($class) because : $e" if $e;
- }
+ my $found;
+ my %exceptions;
+ for my $class (@classes) {
+ my $e = _try_load_one_class($class);
- # initialize a metaclass if necessary
- unless (does_metaclass_exist($class)) {
- my $e = do { local $@; eval { Class::MOP::Class->initialize($class) }; $@ };
- confess "Could not initialize class ($class) because : $e" if $e;
+ if ($e) {
+ $exceptions{$class} = $e;
+ }
+ else {
+ $found = $class;
+ last;
+ }
}
- return get_metaclass_by_name($class) if defined wantarray;
+ 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;
+
+ 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::
))
);
-# 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
))
);
+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 $clone;
});
## --------------------------------------------------------
))
);
-Class::MOP::Method::Generated->meta->add_method('new' => sub {
- my ($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::Accessor
))
);
-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_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
Class::MOP::Instance->meta->add_attribute(
Class::MOP::Attribute->new('attributes',
- reader => { attributes => \&Class::MOP::Instance::attributes },
+ reader => { attributes => \&Class::MOP::Instance::get_all_attributes },
),
);
# for the constructor to be able to use it
Class::MOP::Instance->meta->get_meta_instance;
-Class::MOP::Instance->meta->add_method('new' => sub {
- my $class = shift;
- my $options = $class->BUILDARGS(@_);
-
- my $self = $class->meta->new_object(%$options);
-
- Scalar::Util::weaken($self->{'associated_metaclass'});
-
- $self;
-});
-
# 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.
$_->meta->make_immutable(
inline_constructor => 1,
=head2 Utility functions
+Note that these are all called as B<functions, not methods>.
+
=over 4
=item B<load_class ($class_name)>
=item B<check_package_cache_flag ($pkg)>
+B<NOTE: DO NOT USE THIS FUNCTION, IT IS FOR INTERNAL USE ONLY!>
+
This will return an integer that is managed by C<Class::MOP::Class>
to determine if a module's symbol table has been altered.
=item B<get_code_info ($code)>
+B<NOTE: DO NOT USE THIS FUNCTION, IT IS FOR INTERNAL USE ONLY!>
+
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<$code> reference is from.
=item B<in_global_destruction>
+B<NOTE: DO NOT USE THIS FUNCTION, IT IS FOR INTERNAL USE ONLY!>
+
If L<Devel::GlobalDestruction> is available, this returns true under global
destruction.
Otherwise it's a constant returning false.
+=item B<load_first_existing_class ($class_name, [$class_name, ...])>
+
+B<NOTE: DO NOT USE THIS FUNCTION, IT IS FOR INTERNAL USE ONLY!>
+
+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
Brandon (blblack) Black
+Florian (rafl) Ragwitz
+
Guillermo (groditi) Roditi
Matt (mst) Trout
projects / gitmo/Class-MOP.git / blobdiff