X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FMeta%2FAttribute.pm;h=415ad53bed1784699852b25934b6629309fda03d;hb=ce5920b75da54ce1977fc44cd89b400175b6d034;hp=0ee84009722a20eb38b08727e4943ae5a437af73;hpb=8cf51b82d94aad02f81dc853be874e9a49a82c31;p=gitmo%2FMouse.git

diff --git a/lib/Mouse/Meta/Attribute.pm b/lib/Mouse/Meta/Attribute.pm
index 0ee8400..415ad53 100644
--- a/lib/Mouse/Meta/Attribute.pm
+++ b/lib/Mouse/Meta/Attribute.pm
@@ -1,14 +1,12 @@
 package Mouse::Meta::Attribute;
-use strict;
-use warnings;
+use Mouse::Util qw(:meta); # enables strict and warnings
 
 use Carp ();
 
-use Mouse::Util qw(:meta);
-
 use Mouse::Meta::TypeConstraint;
 use Mouse::Meta::Method::Accessor;
 
+
 sub _process_options{
     my($class, $name, $args) = @_;
 
@@ -82,8 +80,7 @@ sub _process_options{
         $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($args->{isa});
     }
     elsif(exists $args->{does}){
-        # TODO
-        # $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_does_type_constraint($args->{does});
+        $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_does_type_constraint($args->{does});
     }
     $tc = $args->{type_constraint};
 
@@ -251,7 +248,7 @@ sub canonicalize_args{ # DEPRECATED
     return %args;
 }
 
-sub create {
+sub create { # DEPRECATED
     my ($self, $class, $name, %args) = @_;
 
     Carp::cluck("$self->create has been deprecated."
@@ -266,15 +263,12 @@ sub _coerce_and_verify {
     my($self, $value, $instance) = @_;
 
     my $type_constraint = $self->{type_constraint};
-
-    return $value if !$type_constraint;
+    return $value if !defined $type_constraint;
 
     if ($self->should_coerce && $type_constraint->has_coercion) {
         $value = $type_constraint->coerce($value);
     }
 
-    return $value if $type_constraint->check($value);
-
     $self->verify_against_type_constraint($value);
 
     return $value;
@@ -284,7 +278,7 @@ sub verify_against_type_constraint {
     my ($self, $value) = @_;
 
     my $type_constraint = $self->{type_constraint};
-    return 1 if !$type_constraint;;
+    return 1 if !$type_constraint;
     return 1 if $type_constraint->check($value);
 
     $self->verify_type_constraint_error($self->name, $value, $type_constraint);
@@ -292,7 +286,8 @@ sub verify_against_type_constraint {
 
 sub verify_type_constraint_error {
     my($self, $name, $value, $type) = @_;
-    $self->throw_error("Attribute ($name) does not pass the type constraint because: " . $type->get_message($value));
+    $self->throw_error("Attribute ($name) does not pass the type constraint because: "
+        . $type->get_message($value));
 }
 
 sub coerce_constraint { # DEPRECATED
@@ -304,21 +299,6 @@ sub coerce_constraint { # DEPRECATED
     return Mouse::Util::TypeConstraints->typecast_constraints($_[0]->associated_class->name, $type, $_[1]);
 }
 
-sub _canonicalize_handles {
-    my $self    = shift;
-    my $handles = shift;
-
-    if (ref($handles) eq 'HASH') {
-        return %$handles;
-    }
-    elsif (ref($handles) eq 'ARRAY') {
-        return map { $_ => $_ } @$handles;
-    }
-    else {
-        $self->throw_error("Unable to canonicalize the 'handles' option with $handles");
-    }
-}
-
 sub clone_and_inherit_options{
     my($self, %args) = @_;
 
@@ -356,10 +336,10 @@ sub get_parent_args { # DEPRECATED
 }
 
 
-sub get_read_method { # DEPRECATED
+sub get_read_method {
     $_[0]->{reader} || $_[0]->{accessor}
 }
-sub get_write_method { # DEPRECATED
+sub get_write_method {
     $_[0]->{writer} || $_[0]->{accessor}
 }
 
@@ -375,7 +355,7 @@ sub get_read_method_ref{
             $metaclass->name->can($reader);
         }
         else{
-            Mouse::Meta::Method::Accessor->_generate_reader($self, undef, $metaclass);
+            $self->accessor_metaclass->_generate_reader($self, $metaclass);
         }
     };
 }
@@ -392,32 +372,73 @@ sub get_write_method_ref{
             $metaclass->name->can($reader);
         }
         else{
-            Mouse::Meta::Method::Accessor->_generate_writer($self, undef, $metaclass);
+            $self->accessor_metaclass->_generate_writer($self, $metaclass);
         }
     };
 }
 
+sub _canonicalize_handles {
+    my($self, $handles) = @_;
+
+    if (ref($handles) eq 'HASH') {
+        return %$handles;
+    }
+    elsif (ref($handles) eq 'ARRAY') {
+        return map { $_ => $_ } @$handles;
+    }
+    elsif (ref($handles) eq 'Regexp') {
+        my $class_or_role = ($self->{isa} || $self->{does})
+            || $self->throw_error("Cannot delegate methods based on a Regexp without a type constraint (isa)");
+
+        my $meta = Mouse::Meta::Class->initialize("$class_or_role"); # "" for stringify
+        return map  { $_ => $_ }
+               grep { $_ ne 'meta' && !Mouse::Object->can($_) && $_ =~ $handles }
+                   $meta->isa('Mouse::Meta::Class') ? $meta->get_all_method_names : $meta->get_method_list;
+    }
+    else {
+        $self->throw_error("Unable to canonicalize the 'handles' option with $handles");
+    }
+}
+
+
 sub associate_method{
     my ($attribute, $method) = @_;
     $attribute->{associated_methods}++;
     return;
 }
 
+sub accessor_metaclass(){ 'Mouse::Meta::Method::Accessor' }
+
 sub install_accessors{
     my($attribute) = @_;
 
-    my $metaclass       = $attribute->{associated_class};
+    my $metaclass      = $attribute->{associated_class};
+    my $accessor_class = $attribute->accessor_metaclass;
 
-    foreach my $type(qw(accessor reader writer predicate clearer handles)){
+    foreach my $type(qw(accessor reader writer predicate clearer)){
         if(exists $attribute->{$type}){
-            my $installer    = '_generate_' . $type;
+            my $generator = '_generate_' . $type;
+            my $code      = $accessor_class->$generator($attribute, $metaclass);
+            $metaclass->add_method($attribute->{$type} => $code);
+            $attribute->associate_method($code);
+        }
+    }
 
-            Mouse::Meta::Method::Accessor->$installer($attribute, $attribute->{$type}, $metaclass);
+    # install delegation
+    if(exists $attribute->{handles}){
+        my %handles = $attribute->_canonicalize_handles($attribute->{handles});
+        my $reader  = $attribute->get_read_method_ref;
 
-            $attribute->{associated_methods}++;
+        while(my($handle_name, $method_to_call) = each %handles){
+            my $code = $accessor_class->_generate_delegation($attribute, $metaclass,
+                $reader, $handle_name, $method_to_call);
+
+            $metaclass->add_method($handle_name => $code);
+            $attribute->associate_method($code);
         }
     }
 
+
     if($attribute->can('create') != \&create){
         # backword compatibility
         $attribute->create($metaclass, $attribute->name, %{$attribute});
@@ -564,13 +585,13 @@ on success, otherwise C<confess>es.
 Creates a new attribute in the owner class, inheriting options from parent classes.
 Accessors and helper methods are installed. Some error checking is done.
 
-=head2 C<< get_read_method_ref >>
-
-=head2 C<< get_write_method_ref >>
-
-Returns the subroutine reference of a method suitable for reading or
-writing the attribute's value in the associated class. These methods
-always return a subroutine reference, regardless of whether or not the
+=head2 C<< get_read_method_ref >>
+
+=head2 C<< get_write_method_ref >>
+
+Returns the subroutine reference of a method suitable for reading or
+writing the attribute's value in the associated class. These methods
+always return a subroutine reference, regardless of whether or not the
 attribute is read- or write-only.
 
 =head1 SEE ALSO