X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=examples%2FC3MethodDispatchOrder.pod;h=b635f5683f6843553490825c3d513010cc6d7476;hb=33ecbaa40bbcda7518cb3e5477d357e6b3d95ff6;hp=a04e63c4961ef8d6c6eef242fdd152eade2fc82f;hpb=f3f5bd3405b08b20ab8719ab7670277dd732c492;p=gitmo%2FClass-MOP.git

diff --git a/examples/C3MethodDispatchOrder.pod b/examples/C3MethodDispatchOrder.pod
index a04e63c..b635f56 100644
--- a/examples/C3MethodDispatchOrder.pod
+++ b/examples/C3MethodDispatchOrder.pod
@@ -8,11 +8,11 @@ use warnings;
 use Carp 'confess';
 use Algorithm::C3;
 
-our $VERSION = '0.01';
+our $VERSION = '0.03';
 
 use base 'Class::MOP::Class';
 
-my $_find_method_in_superclass = sub {
+my $_find_method = sub {
     my ($class, $method) = @_;
     foreach my $super ($class->class_precedence_list) {
         return $super->meta->get_method($method)   
@@ -20,35 +20,45 @@ my $_find_method_in_superclass = sub {
     }
 };
 
-sub initialize {
-    my $class = shift;
-    my $meta  = $class->SUPER::initialize(@_);
-    $meta->add_method('AUTOLOAD' => sub {
-        my $meta = $_[0]->meta;
-        my $method_name;
-        {
-            no strict 'refs';
-            my $label = ${$meta->name . '::AUTOLOAD'};
-            $method_name = (split /\:\:/ => $label)[-1];
-        }
-        my $method = $_find_method_in_superclass->($meta, $method_name);
+C3MethodDispatchOrder->meta->add_around_method_modifier('initialize' => sub {
+	my $cont = shift;
+    my $meta = $cont->(@_);
+    
+    # we need to look at $AUTOLOAD in the package where the coderef belongs
+    # if subname works, then it'll be where this AUTOLOAD method was installed
+    # otherwise, it'll be $C3MethodDispatchOrder::AUTOLOAD. get_code_info
+    # tells us where AUTOLOAD will look
+    my $autoload;
+    $autoload = sub {
+        my ($package) = Class::MOP::get_code_info($autoload);
+        my $label = ${ $package->meta->get_package_symbol('$AUTOLOAD') };
+        my $method_name = (split /\:\:/ => $label)[-1];
+        my $method = $_find_method->($_[0]->meta, $method_name);
         (defined $method) || confess "Method ($method_name) not found";
         goto &$method;
-    });
+    };
+
+    $meta->add_method('AUTOLOAD' => $autoload)
+        unless $meta->has_method('AUTOLOAD');
+    
     $meta->add_method('can' => sub {
-        $_find_method_in_superclass->($_[0]->meta, $_[1]);
-    });
-    return $meta;
-}
+        $_find_method->($_[0]->meta, $_[1]);
+    }) unless $meta->has_method('can');   
+    
+	return $meta;
+});
 
 sub superclasses {
     my $self = shift;
-    no strict 'refs';
+    
+    $self->add_package_symbol('@SUPERS' => [])    
+        unless $self->has_package_symbol('@SUPERS');
+            
     if (@_) {
         my @supers = @_;
-        @{$self->name . '::SUPERS'} = @supers;
+        @{$self->get_package_symbol('@SUPERS')} = @supers;
     }
-    @{$self->name . '::SUPERS'};        
+    @{$self->get_package_symbol('@SUPERS')};        
 }
 
 sub class_precedence_list {
@@ -108,13 +118,25 @@ C3MethodDispatchOrder - An example attribute metaclass for changing to C3 method
   
 =head1 DESCRIPTION
 
-=head1 AUTHOR
+This is an example of how you could change the method dispatch order of a 
+class using L<Class::MOP>. Using the L<Algorithm::C3> module, this repleces 
+the normal depth-first left-to-right perl dispatch order with the C3 method 
+dispatch order (see the L<Algorithm::C3> or L<Class::C3> docs for more 
+information about this).
+
+This example could be used as a template for other method dispatch orders 
+as well, all that is required is to write a the C<class_precedence_list> method 
+which will return a linearized list of classes to dispatch along. 
+
+=head1 AUTHORS
 
 Stevan Little E<lt>stevan@iinteractive.comE<gt>
 
+Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
+
 =head1 COPYRIGHT AND LICENSE
 
-Copyright 2006 by Infinity Interactive, Inc.
+Copyright 2006-2008 by Infinity Interactive, Inc.
 
 L<http://www.iinteractive.com>