X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FClass%2FMOP.pm;h=a1c86dca238e17131b831a36ea950cbe9ff9d13a;hb=f014c28ba9a61d3ff1eceb38e18acb266e803ad4;hp=bbe1b0350a5c833d47acc45f76aec333e7f1da4e;hpb=bcef1f7ccd2532332b64ec22c44b202395733411;p=gitmo%2FClass-MOP.git

diff --git a/lib/Class/MOP.pm b/lib/Class/MOP.pm
index bbe1b03..a1c86dc 100644
--- a/lib/Class/MOP.pm
+++ b/lib/Class/MOP.pm
@@ -9,8 +9,13 @@ use 5.008;
 use MRO::Compat;
 
 use Carp          'confess';
-use Scalar::Util  'weaken', 'reftype', 'blessed';
+use Scalar::Util  'weaken', 'isweak', 'reftype', 'blessed';
+use Data::OptList;
+use Try::Tiny;
 
+use Class::MOP::Mixin::AttributeCore;
+use Class::MOP::Mixin::HasAttributes;
+use Class::MOP::Mixin::HasMethods;
 use Class::MOP::Class;
 use Class::MOP::Attribute;
 use Class::MOP::Method;
@@ -24,7 +29,7 @@ BEGIN {
     *check_package_cache_flag = \&mro::get_pkg_gen;
 }
 
-our $VERSION   = '0.92_01';
+our $VERSION   = '1.10';
 our $XS_VERSION = $VERSION;
 $VERSION = eval $VERSION;
 our $AUTHORITY = 'cpan:STEVAN';
@@ -32,7 +37,6 @@ our $AUTHORITY = 'cpan:STEVAN';
 require XSLoader;
 XSLoader::load( __PACKAGE__, $XS_VERSION );
 
-
 {
     # Metaclasses are singletons, so we cache them here.
     # there is no need to worry about destruction though
@@ -47,6 +51,7 @@ XSLoader::load( __PACKAGE__, $XS_VERSION );
     sub get_metaclass_by_name       { $METAS{$_[0]}         }
     sub store_metaclass_by_name     { $METAS{$_[0]} = $_[1] }
     sub weaken_metaclass            { weaken($METAS{$_[0]}) }
+    sub metaclass_is_weak           { isweak($METAS{$_[0]}) }
     sub does_metaclass_exist        { exists $METAS{$_[0]} && defined $METAS{$_[0]} }
     sub remove_metaclass_by_name    { delete $METAS{$_[0]}; return }
 
@@ -74,65 +79,62 @@ sub _class_to_pmfile {
 }
 
 sub load_first_existing_class {
-    my @classes = @_
-        or return;
+    my $classes = Data::OptList::mkopt(\@_)
+      or return;
 
-    foreach my $class (@classes) {
-        unless ( _is_valid_class_name($class) ) {
-            my $display = defined($class) ? $class : 'undef';
+    foreach my $class (@{ $classes }) {
+        my $name = $class->[0];
+        unless ( _is_valid_class_name($name) ) {
+            my $display = defined($name) ? $name : 'undef';
             confess "Invalid class name ($display)";
         }
     }
 
     my $found;
     my %exceptions;
-    for my $class (@classes) {
-        my $e = _try_load_one_class($class);
 
-        if ($e) {
-            my $pmfile = _class_to_pmfile($class);
-            $exceptions{$class} = $e;
-            last if $e !~ /^Can't locate \Q$pmfile\E in \@INC/;
+    for my $class (@{ $classes }) {
+        my ($name, $options) = @{ $class };
+
+        if ($options) {
+            return $name if is_class_loaded($name, $options);
+            if (is_class_loaded($name)) {
+                # we already know it's loaded and too old, but we call
+                # ->VERSION anyway to generate the exception for us
+                $name->VERSION($options->{-version});
+            }
         }
         else {
-            $found = $class;
-            last;
+            return $name if is_class_loaded($name);
         }
-    }
-
-    return $found if $found;
 
-    confess join(
-        "\n",
-        map {
-            sprintf(
-                "Could not load class (%s) because : %s", $_,
-                $exceptions{$_}
-                )
+        my $file = _class_to_pmfile($name);
+        return $name if try {
+            local $SIG{__DIE__};
+            require $file;
+            $name->VERSION($options->{-version})
+                if defined $options->{-version};
+            return 1;
+        }
+        catch {
+            unless (/^Can't locate \Q$file\E in \@INC/) {
+                confess "Couldn't load class ($name) because: $_";
             }
-        grep {
-            exists $exceptions{$_}
-            } @classes
-    );
-}
-
-sub _try_load_one_class {
-    my $class = shift;
 
-    return if is_class_loaded($class);
-
-    my $file = _class_to_pmfile($class);
+            return;
+        };
+    }
 
-    return do {
-        local $@;
-        local $SIG{__DIE__};
-        eval { require($file) };
-        $@;
-    };
+    if ( @{ $classes } > 1 ) {
+        my @list = map { $_->[0] } @{ $classes };
+        confess "Can't locate any of @list in \@INC (\@INC contains: @INC).";
+    } else {
+        confess "Can't locate " . _class_to_pmfile($classes->[0]->[0]) . " in \@INC (\@INC contains: @INC).";
+    }
 }
 
 sub load_class {
-    load_first_existing_class($_[0]);
+    load_first_existing_class($_[0], ref $_[1] ? $_[1] : ());
 
     # This is done to avoid breaking code which checked the return value. Said
     # code is dumb. The return value was _always_ true, since it dies on
@@ -177,68 +179,101 @@ sub _is_valid_class_name {
 # inherit them using _construct_instance
 
 ## --------------------------------------------------------
-## Class::MOP::Package
+## Class::MOP::Mixin::HasMethods
 
-Class::MOP::Package->meta->add_attribute(
-    Class::MOP::Attribute->new('package' => (
+Class::MOP::Mixin::HasMethods->meta->add_attribute(
+    Class::MOP::Attribute->new('_methods' => (
         reader   => {
-            # NOTE: we need to do this in order
-            # for the instance meta-object to
-            # not fall into meta-circular death
-            #
+            # NOTE:
             # we just alias the original method
             # rather than re-produce it here
-            'name' => \&Class::MOP::Package::name
+            '_full_method_map' => \&Class::MOP::Mixin::HasMethods::_full_method_map
         },
+        default => sub { {} }
     ))
 );
 
-Class::MOP::Package->meta->add_attribute(
-    Class::MOP::Attribute->new('namespace' => (
-        reader => {
+Class::MOP::Mixin::HasMethods->meta->add_attribute(
+    Class::MOP::Attribute->new('method_metaclass' => (
+        reader   => {
             # NOTE:
             # we just alias the original method
             # rather than re-produce it here
-            'namespace' => \&Class::MOP::Package::namespace
+            'method_metaclass' => \&Class::MOP::Mixin::HasMethods::method_metaclass
         },
-        init_arg => undef,
-        default  => sub { \undef }
+        default  => 'Class::MOP::Method',
     ))
 );
 
-Class::MOP::Package->meta->add_attribute(
-    Class::MOP::Attribute->new('_methods' => (
+Class::MOP::Mixin::HasMethods->meta->add_attribute(
+    Class::MOP::Attribute->new('wrapped_method_metaclass' => (
         reader   => {
             # NOTE:
             # we just alias the original method
             # rather than re-produce it here
-            '_full_method_map' => \&Class::MOP::Package::_full_method_map
+            'wrapped_method_metaclass' => \&Class::MOP::Mixin::HasMethods::wrapped_method_metaclass
         },
-        default => sub { {} }
+        default  => 'Class::MOP::Method::Wrapped',
     ))
 );
 
-Class::MOP::Package->meta->add_attribute(
-    Class::MOP::Attribute->new('method_metaclass' => (
+## --------------------------------------------------------
+## Class::MOP::Mixin::HasMethods
+
+Class::MOP::Mixin::HasAttributes->meta->add_attribute(
+    Class::MOP::Attribute->new('attributes' => (
+        reader   => {
+            # NOTE: we need to do this in order
+            # for the instance meta-object to
+            # not fall into meta-circular death
+            #
+            # we just alias the original method
+            # rather than re-produce it here
+            '_attribute_map' => \&Class::MOP::Mixin::HasAttributes::_attribute_map
+        },
+        default  => sub { {} }
+    ))
+);
+
+Class::MOP::Mixin::HasAttributes->meta->add_attribute(
+    Class::MOP::Attribute->new('attribute_metaclass' => (
         reader   => {
             # NOTE:
             # we just alias the original method
             # rather than re-produce it here
-            'method_metaclass' => \&Class::MOP::Package::method_metaclass
+            'attribute_metaclass' => \&Class::MOP::Mixin::HasAttributes::attribute_metaclass
         },
-        default  => 'Class::MOP::Method',
+        default  => 'Class::MOP::Attribute',
     ))
 );
 
+## --------------------------------------------------------
+## Class::MOP::Package
+
 Class::MOP::Package->meta->add_attribute(
-    Class::MOP::Attribute->new('wrapped_method_metaclass' => (
+    Class::MOP::Attribute->new('package' => (
         reader   => {
+            # NOTE: we need to do this in order
+            # for the instance meta-object to
+            # not fall into meta-circular death
+            #
+            # we just alias the original method
+            # rather than re-produce it here
+            'name' => \&Class::MOP::Package::name
+        },
+    ))
+);
+
+Class::MOP::Package->meta->add_attribute(
+    Class::MOP::Attribute->new('namespace' => (
+        reader => {
             # NOTE:
             # we just alias the original method
             # rather than re-produce it here
-            'wrapped_method_metaclass' => \&Class::MOP::Package::wrapped_method_metaclass
+            'namespace' => \&Class::MOP::Package::namespace
         },
-        default  => 'Class::MOP::Method::Wrapped',
+        init_arg => undef,
+        default  => sub { \undef }
     ))
 );
 
@@ -291,21 +326,6 @@ Class::MOP::Module->meta->add_attribute(
 ## Class::MOP::Class
 
 Class::MOP::Class->meta->add_attribute(
-    Class::MOP::Attribute->new('attributes' => (
-        reader   => {
-            # NOTE: we need to do this in order
-            # for the instance meta-object to
-            # not fall into meta-circular death
-            #
-            # we just alias the original method
-            # rather than re-produce it here
-            'get_attribute_map' => \&Class::MOP::Class::get_attribute_map
-        },
-        default  => sub { {} }
-    ))
-);
-
-Class::MOP::Class->meta->add_attribute(
     Class::MOP::Attribute->new('superclasses' => (
         accessor => {
             # NOTE:
@@ -319,18 +339,6 @@ Class::MOP::Class->meta->add_attribute(
 );
 
 Class::MOP::Class->meta->add_attribute(
-    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
-        },
-        default  => 'Class::MOP::Attribute',
-    ))
-);
-
-Class::MOP::Class->meta->add_attribute(
     Class::MOP::Attribute->new('instance_metaclass' => (
         reader   => {
             # NOTE: we need to do this in order
@@ -388,9 +396,8 @@ Class::MOP::Class->meta->add_attribute(
 # _construct_class_instance method.
 
 ## --------------------------------------------------------
-## Class::MOP::Attribute
-
-Class::MOP::Attribute->meta->add_attribute(
+## Class::MOP::Mixin::AttributeCore
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('name' => (
         reader   => {
             # NOTE: we need to do this in order
@@ -399,106 +406,108 @@ Class::MOP::Attribute->meta->add_attribute(
             #
             # we just alias the original method
             # rather than re-produce it here
-            'name' => \&Class::MOP::Attribute::name
+            'name' => \&Class::MOP::Mixin::AttributeCore::name
         }
     ))
 );
 
-Class::MOP::Attribute->meta->add_attribute(
-    Class::MOP::Attribute->new('associated_class' => (
-        reader   => {
-            # NOTE: we need to do this in order
-            # for the instance meta-object to
-            # not fall into meta-circular death
-            #
-            # we just alias the original method
-            # rather than re-produce it here
-            'associated_class' => \&Class::MOP::Attribute::associated_class
-        }
-    ))
-);
-
-Class::MOP::Attribute->meta->add_attribute(
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('accessor' => (
-        reader    => { 'accessor'     => \&Class::MOP::Attribute::accessor     },
-        predicate => { 'has_accessor' => \&Class::MOP::Attribute::has_accessor },
+        reader    => { 'accessor'     => \&Class::MOP::Mixin::AttributeCore::accessor     },
+        predicate => { 'has_accessor' => \&Class::MOP::Mixin::AttributeCore::has_accessor },
     ))
 );
 
-Class::MOP::Attribute->meta->add_attribute(
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('reader' => (
-        reader    => { 'reader'     => \&Class::MOP::Attribute::reader     },
-        predicate => { 'has_reader' => \&Class::MOP::Attribute::has_reader },
+        reader    => { 'reader'     => \&Class::MOP::Mixin::AttributeCore::reader     },
+        predicate => { 'has_reader' => \&Class::MOP::Mixin::AttributeCore::has_reader },
     ))
 );
 
-Class::MOP::Attribute->meta->add_attribute(
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('initializer' => (
-        reader    => { 'initializer'     => \&Class::MOP::Attribute::initializer     },
-        predicate => { 'has_initializer' => \&Class::MOP::Attribute::has_initializer },
+        reader    => { 'initializer'     => \&Class::MOP::Mixin::AttributeCore::initializer     },
+        predicate => { 'has_initializer' => \&Class::MOP::Mixin::AttributeCore::has_initializer },
     ))
 );
 
-Class::MOP::Attribute->meta->add_attribute(
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('definition_context' => (
-        reader    => { 'definition_context'     => \&Class::MOP::Attribute::definition_context     },
+        reader    => { 'definition_context'     => \&Class::MOP::Mixin::AttributeCore::definition_context     },
     ))
 );
 
-Class::MOP::Attribute->meta->add_attribute(
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('writer' => (
-        reader    => { 'writer'     => \&Class::MOP::Attribute::writer     },
-        predicate => { 'has_writer' => \&Class::MOP::Attribute::has_writer },
+        reader    => { 'writer'     => \&Class::MOP::Mixin::AttributeCore::writer     },
+        predicate => { 'has_writer' => \&Class::MOP::Mixin::AttributeCore::has_writer },
     ))
 );
 
-Class::MOP::Attribute->meta->add_attribute(
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('predicate' => (
-        reader    => { 'predicate'     => \&Class::MOP::Attribute::predicate     },
-        predicate => { 'has_predicate' => \&Class::MOP::Attribute::has_predicate },
+        reader    => { 'predicate'     => \&Class::MOP::Mixin::AttributeCore::predicate     },
+        predicate => { 'has_predicate' => \&Class::MOP::Mixin::AttributeCore::has_predicate },
     ))
 );
 
-Class::MOP::Attribute->meta->add_attribute(
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('clearer' => (
-        reader    => { 'clearer'     => \&Class::MOP::Attribute::clearer     },
-        predicate => { 'has_clearer' => \&Class::MOP::Attribute::has_clearer },
+        reader    => { 'clearer'     => \&Class::MOP::Mixin::AttributeCore::clearer     },
+        predicate => { 'has_clearer' => \&Class::MOP::Mixin::AttributeCore::has_clearer },
     ))
 );
 
-Class::MOP::Attribute->meta->add_attribute(
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('builder' => (
-        reader    => { 'builder'     => \&Class::MOP::Attribute::builder     },
-        predicate => { 'has_builder' => \&Class::MOP::Attribute::has_builder },
+        reader    => { 'builder'     => \&Class::MOP::Mixin::AttributeCore::builder     },
+        predicate => { 'has_builder' => \&Class::MOP::Mixin::AttributeCore::has_builder },
     ))
 );
 
-Class::MOP::Attribute->meta->add_attribute(
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('init_arg' => (
-        reader    => { 'init_arg'     => \&Class::MOP::Attribute::init_arg     },
-        predicate => { 'has_init_arg' => \&Class::MOP::Attribute::has_init_arg },
+        reader    => { 'init_arg'     => \&Class::MOP::Mixin::AttributeCore::init_arg     },
+        predicate => { 'has_init_arg' => \&Class::MOP::Mixin::AttributeCore::has_init_arg },
     ))
 );
 
-Class::MOP::Attribute->meta->add_attribute(
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
     Class::MOP::Attribute->new('default' => (
         # default has a custom 'reader' method ...
-        predicate => { 'has_default' => \&Class::MOP::Attribute::has_default },
+        predicate => { 'has_default' => \&Class::MOP::Mixin::AttributeCore::has_default },
+    ))
+);
+
+Class::MOP::Mixin::AttributeCore->meta->add_attribute(
+    Class::MOP::Attribute->new('insertion_order' => (
+        reader      => { 'insertion_order' => \&Class::MOP::Mixin::AttributeCore::insertion_order },
+        writer      => { '_set_insertion_order' => \&Class::MOP::Mixin::AttributeCore::_set_insertion_order },
+        predicate   => { 'has_insertion_order' => \&Class::MOP::Mixin::AttributeCore::has_insertion_order },
     ))
 );
 
+## --------------------------------------------------------
+## Class::MOP::Attribute
 Class::MOP::Attribute->meta->add_attribute(
-    Class::MOP::Attribute->new('associated_methods' => (
-        reader   => { 'associated_methods' => \&Class::MOP::Attribute::associated_methods },
-        default  => sub { [] }
+    Class::MOP::Attribute->new('associated_class' => (
+        reader   => {
+            # NOTE: we need to do this in order
+            # for the instance meta-object to
+            # not fall into meta-circular death
+            #
+            # we just alias the original method
+            # rather than re-produce it here
+            'associated_class' => \&Class::MOP::Attribute::associated_class
+        }
     ))
 );
 
 Class::MOP::Attribute->meta->add_attribute(
-    Class::MOP::Attribute->new('insertion_order' => (
-        reader      => { 'insertion_order' => \&Class::MOP::Attribute::insertion_order },
-        writer      => { '_set_insertion_order' => \&Class::MOP::Attribute::_set_insertion_order },
-        predicate   => { 'has_insertion_order' => \&Class::MOP::Attribute::has_insertion_order },
+    Class::MOP::Attribute->new('associated_methods' => (
+        reader   => { 'associated_methods' => \&Class::MOP::Attribute::associated_methods },
+        default  => sub { [] }
     ))
 );
 
@@ -540,13 +549,6 @@ Class::MOP::Method->meta->add_attribute(
     ))
 );
 
-Class::MOP::Method->meta->add_method('clone' => sub {
-    my $self  = shift;
-    my $clone = $self->meta->clone_object($self, @_);
-    $clone->_set_original_method($self);
-    return $clone;
-});
-
 ## --------------------------------------------------------
 ## Class::MOP::Method::Wrapped
 
@@ -663,6 +665,18 @@ Class::MOP::Instance->meta->add_attribute(
     ),
 );
 
+## --------------------------------------------------------
+## Class::MOP::Object
+
+# need to replace the meta method there with a real meta method object
+Class::MOP::Object->meta->_add_meta_method('meta');
+
+## --------------------------------------------------------
+## Class::MOP::Mixin
+
+# need to replace the meta method there with a real meta method object
+Class::MOP::Mixin->meta->_add_meta_method('meta');
+
 require Class::MOP::Deprecated unless our $no_deprecated;
 
 # we need the meta instance of the meta instance to be created now, in order
@@ -699,6 +713,19 @@ $_->meta->make_immutable(
     Class::MOP::Method::Accessor
     Class::MOP::Method::Constructor
     Class::MOP::Method::Wrapped
+
+    Class::MOP::Method::Meta
+/;
+
+$_->meta->make_immutable(
+    inline_constructor  => 0,
+    constructor_name    => undef,
+    inline_accessors => 0,
+) for qw/
+    Class::MOP::Mixin
+    Class::MOP::Mixin::AttributeCore
+    Class::MOP::Mixin::HasAttributes
+    Class::MOP::Mixin::HasMethods
 /;
 
 1;
@@ -828,6 +855,18 @@ metaclass compatibility both upwards and downwards.
     |    A    |<----|    B    |
     +---------+     +---------+
 
+In actuality, I<all> of a class's metaclasses must be compatible,
+not just the class metaclass. That includes the instance, attribute,
+and method metaclasses, as well as the constructor and destructor
+classes.
+
+C<Class::MOP> will attempt to fix some simple types of
+incompatibilities. If all the metaclasses for the parent class are
+I<subclasses> of the child's metaclasses then we can simply replace
+the child's metaclasses with the parent's. In addition, if the child
+is missing a metaclass that the parent has, we can also just make the
+child use the parent's metaclass.
+
 As I said this is a highly esoteric topic and one you will only run
 into if you do a lot of subclassing of L<Class::MOP::Class>. If you
 are interested in why this is an issue see the paper I<Uniform and
@@ -910,7 +949,7 @@ Note that these are all called as B<functions, not methods>.
 
 =over 4
 
-=item B<Class::MOP::load_class($class_name)>
+=item B<Class::MOP::load_class($class_name, \%options?)>
 
 This will load the specified C<$class_name>, if it is not already
 loaded (as reported by C<is_class_loaded>). This function can be used
@@ -919,9 +958,15 @@ unconditionally.
 
 If the module cannot be loaded, an exception is thrown.
 
-For historical reasons, this function returns explicitly returns a true value.
+You can pass a hash reference with options as second argument. The
+only option currently recognised is C<-version>, which will ensure
+that the loaded class has at least the required version.
+
+See also L</Class Loading Options>.
+
+For historical reasons, this function explicitly returns a true value.
 
-=item B<Class::MOP::is_class_loaded($class_name)>
+=item B<Class::MOP::is_class_loaded($class_name, \%options?)>
 
 Returns a boolean indicating whether or not C<$class_name> has been
 loaded.
@@ -933,6 +978,12 @@ positives. In particular, loading any of the core L<IO> modules will
 cause most of the rest of the core L<IO> modules to falsely report
 having been loaded, due to the way the base L<IO> module works.
 
+You can pass a hash reference with options as second argument. The
+only option currently recognised is C<-version>, which will ensure
+that the loaded class has at least the required version.
+
+See also L</Class Loading Options>.
+
 =item B<Class::MOP::get_code_info($code)>
 
 This function returns two values, the name of the package the C<$code>
@@ -959,6 +1010,8 @@ variable which is not package specific.
 
 =item B<Class::MOP::load_first_existing_class(@class_names)>
 
+=item B<Class::MOP::load_first_existing_class($classA, \%optionsA?, $classB, ...)>
+
 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
@@ -967,6 +1020,13 @@ 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.
 
+Additionally, you can pass a hash reference with options after each
+class name. Currently, only C<-version> is recognised and will ensure
+that the loaded class has at least the required version. If the class
+version is not sufficient, an exception will be raised.
+
+See also L</Class Loading Options>.
+
 =back
 
 =head2 Metaclass cache functions
@@ -1009,6 +1069,11 @@ store a weakened reference in the metaclass cache. This
 function will weaken the reference to the metaclass stored
 in C<$name>.
 
+=item B<Class::MOP::metaclass_is_weak($name)>
+
+Returns true if the metaclass for C<$name> has been weakened
+(via C<weaken_metaclass>).
+
 =item B<Class::MOP::does_metaclass_exist($name)>
 
 This will return true of there exists a metaclass stored in the
@@ -1020,6 +1085,17 @@ This will remove the metaclass stored in the C<$name> key.
 
 =back
 
+=head2 Class Loading Options
+
+=over 4
+
+=item -version
+
+Can be used to pass a minimum required version that will be checked
+against the class version after it was loaded.
+
+=back
+
 =head1 SEE ALSO
 
 =head2 Books
@@ -1074,7 +1150,7 @@ L<http://citeseer.ist.psu.edu/37617.html>
 
 =item L<http://svn.openfoundry.org/pugs/misc/Perl-MetaModel/>
 
-=item L<http://svn.openfoundry.org/pugs/perl5/Perl6-ObjectSpace>
+=item L<http://github.com/perl6/p5-modules/tree/master/Perl6-ObjectSpace/>
 
 =back
 
@@ -1147,7 +1223,7 @@ Dylan Hardison
 
 =head1 COPYRIGHT AND LICENSE
 
-Copyright 2006-2009 by Infinity Interactive, Inc.
+Copyright 2006-2010 by Infinity Interactive, Inc.
 
 L<http://www.iinteractive.com>