X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FMeta%2FClass.pm;h=8ecb8282e7268d317964bd70890fa3fcdd0472d9;hb=f7b11a21869769d2b49bba4fa72d33fa54ad0c2e;hp=42f824e57f91d018a6b7908efc210905820f756b;hpb=66eea168570f52254def2675f86706336ab9bd8a;p=gitmo%2FMouse.git

diff --git a/lib/Mouse/Meta/Class.pm b/lib/Mouse/Meta/Class.pm
index 42f824e..8ecb828 100644
--- a/lib/Mouse/Meta/Class.pm
+++ b/lib/Mouse/Meta/Class.pm
@@ -4,6 +4,7 @@ use strict;
 use warnings;
 
 use Scalar::Util 'blessed';
+use Carp 'confess';
 
 use MRO::Compat;
 
@@ -29,7 +30,7 @@ do {
 
 sub new {
     my $class = shift;
-    my %args = @_;
+    my %args  = @_;
 
     $args{attributes} = {};
     $args{superclasses} = do {
@@ -83,6 +84,37 @@ sub get_attribute     { $_[0]->{attributes}->{$_[1]} }
 
 sub linearized_isa { @{ mro::get_linear_isa($_[0]->name) } }
 
+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 . ")";
+
+    $class->clone_instance($instance, @_);
+}
+
+sub clone_instance {
+    my ($class, $instance, %params) = @_;
+
+    (blessed($instance))
+        || confess "You can only clone instances, \$self is not a blessed instance";
+
+    my $clone = bless { %$instance }, ref $instance;
+
+    foreach my $attr ($class->compute_all_applicable_attributes()) {
+        if ( defined( my $init_arg = $attr->init_arg ) ) {
+            if (exists $params{$init_arg}) {
+                $clone->{ $attr->name } = $params{$init_arg};
+            }
+        }
+    }
+
+    return $clone;
+
+}
+
+
 1;
 
 __END__
@@ -137,5 +169,14 @@ Returns the L<Mouse::Meta::Attribute> with the given name.
 
 Returns the list of classes in method dispatch order, with duplicates removed.
 
+=head2 clone_object Instance -> Instance
+
+Clones the given C<Instance> which must be an instance governed by this
+metaclass.
+
+=head2 clone_instance Instance, Parameters -> Instance
+
+Clones the given C<Instance> and sets any additional parameters.
+
 =cut