X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoose%2FMeta%2FAttribute.pm;h=137d139c7dc39fd71e77c498bc921f94fc30a7f1;hb=ae7820b1b884344a7ee90d94b484ca46459eb7b1;hp=31d96a39579a072a86c3acabe6e0c3794aaa4b5d;hpb=5ef36adde3d619733607b9f5f1136524a00848df;p=gitmo%2FMoose.git

diff --git a/lib/Moose/Meta/Attribute.pm b/lib/Moose/Meta/Attribute.pm
index 31d96a3..137d139 100644
--- a/lib/Moose/Meta/Attribute.pm
+++ b/lib/Moose/Meta/Attribute.pm
@@ -5,9 +5,11 @@ use strict;
 use warnings;
 
 use Scalar::Util 'blessed', 'weaken';
+use List::MoreUtils 'any';
+use Try::Tiny;
 use overload     ();
 
-our $VERSION   = '0.85';
+our $VERSION   = '1.06';
 our $AUTHORITY = 'cpan:STEVAN';
 
 use Moose::Meta::Method::Accessor;
@@ -15,37 +17,8 @@ use Moose::Meta::Method::Delegation;
 use Moose::Util ();
 use Moose::Util::TypeConstraints ();
 
-use base 'Class::MOP::Attribute';
-
-# options which are not directly used
-# but we store them for metadata purposes
-__PACKAGE__->meta->add_attribute('isa'  => (reader    => '_isa_metadata'));
-__PACKAGE__->meta->add_attribute('does' => (reader    => '_does_metadata'));
-__PACKAGE__->meta->add_attribute('is'   => (reader    => '_is_metadata'));
-
-# these are actual options for the attrs
-__PACKAGE__->meta->add_attribute('required'   => (reader => 'is_required'      ));
-__PACKAGE__->meta->add_attribute('lazy'       => (reader => 'is_lazy'          ));
-__PACKAGE__->meta->add_attribute('lazy_build' => (reader => 'is_lazy_build'    ));
-__PACKAGE__->meta->add_attribute('coerce'     => (reader => 'should_coerce'    ));
-__PACKAGE__->meta->add_attribute('weak_ref'   => (reader => 'is_weak_ref'      ));
-__PACKAGE__->meta->add_attribute('auto_deref' => (reader => 'should_auto_deref'));
-__PACKAGE__->meta->add_attribute('type_constraint' => (
-    reader    => 'type_constraint',
-    predicate => 'has_type_constraint',
-));
-__PACKAGE__->meta->add_attribute('trigger' => (
-    reader    => 'trigger',
-    predicate => 'has_trigger',
-));
-__PACKAGE__->meta->add_attribute('handles' => (
-    reader    => 'handles',
-    predicate => 'has_handles',
-));
-__PACKAGE__->meta->add_attribute('documentation' => (
-    reader    => 'documentation',
-    predicate => 'has_documentation',
-));
+use base 'Class::MOP::Attribute', 'Moose::Meta::Mixin::AttributeCore';
+
 __PACKAGE__->meta->add_attribute('traits' => (
     reader    => 'applied_traits',
     predicate => 'has_applied_traits',
@@ -57,7 +30,7 @@ __PACKAGE__->meta->add_attribute('traits' => (
 # for metatrait aliases.
 sub does {
     my ($self, $role_name) = @_;
-    my $name = eval {
+    my $name = try {
         Moose::Util::resolve_metatrait_alias(Attribute => $role_name)
     };
     return 0 if !defined($name); # failed to load class
@@ -163,7 +136,7 @@ my @legal_options_for_inheritance = qw(
     documentation lazy handles
     builder type_constraint
     definition_context
-    lazy_build
+    lazy_build weak_ref
 );
 
 sub legal_options_for_inheritance { @legal_options_for_inheritance }
@@ -317,7 +290,7 @@ sub _process_options {
 
     if (exists $options->{isa}) {
         if (exists $options->{does}) {
-            if (eval { $options->{isa}->can('does') }) {
+            if (try { $options->{isa}->can('does') }) {
                 ($options->{isa}->does($options->{does}))
                     || $class->throw_error("Cannot have an isa option and a does option if the isa does not do the does on attribute ($name)", data => $options);
             }
@@ -425,8 +398,10 @@ sub initialize_instance_slot {
     $val = $self->_coerce_and_verify( $val, $instance );
 
     $self->set_initial_value($instance, $val);
-    $meta_instance->weaken_slot_value($instance, $self->name)
-        if ref $val && $self->is_weak_ref;
+
+    if ( ref $val && $self->is_weak_ref ) {
+        $self->_weaken_value($instance);
+    }
 }
 
 sub _call_builder {
@@ -492,22 +467,33 @@ sub set_value {
 
     $value = $self->_coerce_and_verify( $value, $instance );
 
-    my $meta_instance = Class::MOP::Class->initialize(blessed($instance))
-                                         ->get_meta_instance;
+    my @old;
+    if ( $self->has_trigger && $self->has_value($instance) ) {
+        @old = $self->get_value($instance, 'for trigger');
+    }
 
-    $meta_instance->set_slot_value($instance, $attr_name, $value);
+    $self->SUPER::set_value($instance, $value);
 
-    if (ref $value && $self->is_weak_ref) {
-        $meta_instance->weaken_slot_value($instance, $attr_name);
+    if ( ref $value && $self->is_weak_ref ) {
+        $self->_weaken_value($instance);
     }
 
     if ($self->has_trigger) {
-        $self->trigger->($instance, $value);
+        $self->trigger->($instance, $value, @old);
     }
 }
 
+sub _weaken_value {
+    my ( $self, $instance ) = @_;
+
+    my $meta_instance = Class::MOP::Class->initialize( blessed($instance) )
+        ->get_meta_instance;
+
+    $meta_instance->weaken_slot_value( $instance, $self->name );
+}
+
 sub get_value {
-    my ($self, $instance) = @_;
+    my ($self, $instance, $for_trigger) = @_;
 
     if ($self->is_lazy) {
         unless ($self->has_value($instance)) {
@@ -524,7 +510,7 @@ sub get_value {
         }
     }
 
-    if ($self->should_auto_deref) {
+    if ( $self->should_auto_deref && ! $for_trigger ) {
 
         my $type_constraint = $self->type_constraint;
 
@@ -585,7 +571,7 @@ sub _process_accessors {
      && (!$self->definition_context
       || $method->package_name eq $self->definition_context->{package})) {
         Carp::cluck(
-            "You cannot overwrite a locally defined method ($accessor) with "
+            "You are overwriting a locally defined method ($accessor) with "
           . "an accessor"
         );
     }
@@ -642,6 +628,9 @@ sub remove_delegation {
     my %handles = $self->_canonicalize_handles;
     my $associated_class = $self->associated_class;
     foreach my $handle (keys %handles) {
+        next unless any { $handle eq $_ }
+                    map { $_->name }
+                    @{ $self->associated_methods };
         $self->associated_class->remove_method($handle);
     }
 }
@@ -670,22 +659,25 @@ sub _canonicalize_handles {
         elsif (blessed($handles) && $handles->isa('Moose::Meta::TypeConstraint::DuckType')) {
             return map { $_ => $_ } @{ $handles->methods };
         }
+        elsif (blessed($handles) && $handles->isa('Moose::Meta::TypeConstraint::Role')) {
+            $handles = $handles->role;
+        }
         else {
             $self->throw_error("Unable to canonicalize the 'handles' option with $handles", data => $handles);
         }
     }
-    else {
-        Class::MOP::load_class($handles);
-        my $role_meta = Class::MOP::class_of($handles);
 
-        (blessed $role_meta && $role_meta->isa('Moose::Meta::Role'))
-            || $self->throw_error("Unable to canonicalize the 'handles' option with $handles because its metaclass is not a Moose::Meta::Role", data => $handles);
+    Class::MOP::load_class($handles);
+    my $role_meta = Class::MOP::class_of($handles);
 
-        return map { $_ => $_ } (
-            $role_meta->get_method_list,
-            map { $_->name } $role_meta->get_required_method_list,
+    (blessed $role_meta && $role_meta->isa('Moose::Meta::Role'))
+        || $self->throw_error("Unable to canonicalize the 'handles' option with $handles because its metaclass is not a Moose::Meta::Role", data => $handles);
+
+    return map { $_ => $_ }
+        grep { $_ ne 'meta' } (
+        $role_meta->get_method_list,
+        map { $_->name } $role_meta->get_required_method_list,
         );
-    }
 }
 
 sub _find_delegate_metaclass {
@@ -694,7 +686,7 @@ sub _find_delegate_metaclass {
         # we might be dealing with a non-Moose class,
         # and need to make our own metaclass. if there's
         # already a metaclass, it will be returned
-        return Moose::Meta::Class->initialize($class);
+        return Class::MOP::Class->initialize($class);
     }
     elsif (my $role = $self->_does_metadata) {
         return Class::MOP::class_of($role);
@@ -725,16 +717,17 @@ sub delegation_metaclass { 'Moose::Meta::Method::Delegation' }
 sub _make_delegation_method {
     my ( $self, $handle_name, $method_to_call ) = @_;
 
-    my $method_body;
+    my @curried_arguments;
 
-    $method_body = $method_to_call
-        if 'CODE' eq ref($method_to_call);
+    ($method_to_call, @curried_arguments) = @$method_to_call
+        if 'ARRAY' eq ref($method_to_call);
 
     return $self->delegation_metaclass->new(
         name               => $handle_name,
         package_name       => $self->associated_class->name,
         attribute          => $self,
         delegate_to_method => $method_to_call,
+        curried_arguments  => \@curried_arguments,
     );
 }
 
@@ -951,7 +944,7 @@ I<Attribute (x) does not pass the type constraint (Int) with 'forty-two'>
 
 Before setting the value, a check is made on the type constraint of
 the attribute, if it has one, to see if the value passes it. If the
-value fails to pass, the set operation dies with a L<throw_error>.
+value fails to pass, the set operation dies with a L</throw_error>.
 
 Any coercion to convert values is done before checking the type constraint.
 
@@ -1130,9 +1123,7 @@ Returns true if this attribute has any traits applied.
 
 =head1 BUGS
 
-All complex software has bugs lurking in it, and this module is no
-exception. If you find a bug please either email me, or add the bug
-to cpan-RT.
+See L<Moose/BUGS> for details on reporting bugs.
 
 =head1 AUTHOR
 
@@ -1142,7 +1133,7 @@ Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
 
 =head1 COPYRIGHT AND LICENSE
 
-Copyright 2006-2009 by Infinity Interactive, Inc.
+Copyright 2006-2010 by Infinity Interactive, Inc.
 
 L<http://www.iinteractive.com>