X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoose%2FUtil.pm;h=243793cfec42cf6262f6e766de16b52ce77bd67d;hb=90b20bd60aaeefc2f19154e534abf4bfc1177d8c;hp=36fdf58bae8afe993ea1b2660a3237d411940462;hpb=9e4ed568f2e5c1041e6fea8d0cbde420562ab5df;p=gitmo%2FMoose.git

diff --git a/lib/Moose/Util.pm b/lib/Moose/Util.pm
index 36fdf58..243793c 100644
--- a/lib/Moose/Util.pm
+++ b/lib/Moose/Util.pm
@@ -8,7 +8,7 @@ use Sub::Exporter;
 use Scalar::Util 'blessed';
 use Class::MOP   0.60;
 
-our $VERSION   = '0.84';
+our $VERSION   = '0.89_01';
 $VERSION = eval $VERSION;
 our $AUTHORITY = 'cpan:STEVAN';
 
@@ -24,6 +24,8 @@ my @exports = qw[
     resolve_metaclass_alias
     add_method_modifier
     english_list
+    meta_attribute_alias
+    meta_class_alias
 ];
 
 Sub::Exporter::setup_exporter({
@@ -79,7 +81,7 @@ sub ensure_all_roles {
 
 sub apply_all_roles {
     my $applicant = shift;
-    _apply_all_roles($applicant, sub { 1 }, @_);
+    _apply_all_roles($applicant, undef, @_);
 }
 
 sub _apply_all_roles {
@@ -105,7 +107,9 @@ sub _apply_all_roles {
         }
     }
 
-    @$roles = grep { local $_ = $_->[0]; $role_filter->() } @$roles;
+    if ( defined $role_filter ) {
+        @$roles = grep { local $_ = $_->[0]; $role_filter->() } @$roles;
+    }
 
     return unless @$roles;
 
@@ -146,6 +150,15 @@ sub resolve_metatrait_alias {
     return resolve_metaclass_alias( @_, trait => 1 );
 }
 
+sub _build_alias_package_name {
+    my ($type, $name, $trait) = @_;
+    return 'Moose::Meta::'
+         . $type
+         . '::Custom::'
+         . ( $trait ? 'Trait::' : '' )
+         . $name;
+}
+
 {
     my %cache;
 
@@ -156,12 +169,9 @@ sub resolve_metatrait_alias {
         return $cache{$cache_key}{$metaclass_name}
             if $cache{$cache_key}{$metaclass_name};
 
-        my $possible_full_name
-            = 'Moose::Meta::'
-            . $type
-            . '::Custom::'
-            . ( $options{trait} ? "Trait::" : "" )
-            . $metaclass_name;
+        my $possible_full_name = _build_alias_package_name(
+            $type, $metaclass_name, $options{trait}
+        );
 
         my $loaded_class = Class::MOP::load_first_existing_class(
             $possible_full_name,
@@ -177,7 +187,10 @@ sub resolve_metatrait_alias {
 
 sub add_method_modifier {
     my ( $class_or_obj, $modifier_name, $args ) = @_;
-    my $meta                = find_meta($class_or_obj);
+    my $meta
+        = $class_or_obj->can('add_before_method_modifier')
+        ? $class_or_obj
+        : find_meta($class_or_obj);
     my $code                = pop @{$args};
     my $add_modifier_method = 'add_' . $modifier_name . '_method_modifier';
     if ( my $method_modifier_type = ref( @{$args}[0] ) ) {
@@ -214,6 +227,30 @@ sub _caller_info {
     return \%info;
 }
 
+sub _create_alias {
+    my ($type, $name, $trait, $for) = @_;
+    my $package = _build_alias_package_name($type, $name, $trait);
+    Class::MOP::Class->initialize($package)->add_method(
+        register_implementation => sub { $for }
+    );
+}
+
+sub meta_attribute_alias {
+    my ($to, $from) = @_;
+    $from ||= caller;
+    my $meta = Class::MOP::class_of($from);
+    my $trait = $meta->isa('Moose::Meta::Role');
+    _create_alias('Attribute', $to, $trait, $from);
+}
+
+sub meta_class_alias {
+    my ($to, $from) = @_;
+    $from ||= caller;
+    my $meta = Class::MOP::class_of($from);
+    my $trait = $meta->isa('Moose::Meta::Role');
+    _create_alias('Class', $to, $trait, $from);
+}
+
 1;
 
 __END__
@@ -274,8 +311,8 @@ applicant can be a role name, class name, or object.
 The C<$applicant> must already have a metaclass object.
 
 The list of C<@roles> should be a list of names, each of which can be
-followed by an optional hash reference of options (C<exclude> and
-C<alias>).
+followed by an optional hash reference of options (C<-excludes> and
+C<-alias>).
 
 =item B<ensure_all_roles($applicant, @roles)>
 
@@ -307,8 +344,8 @@ when specifying the C<metaclass> or C<traits> option for an attribute:
         metaclass => "Bar",
     );
 
-The name resolution mechanism is covered in L<Moose/Trait Name
-Resolution>.
+The name resolution mechanism is covered in
+L<Moose/Metaclass and Trait Name Resolution>.
 
 =item B<english_list(@items)>
 
@@ -316,6 +353,14 @@ Given a list of scalars, turns them into a proper list in English
 ("one and two", "one, two, three, and four"). This is used to help us
 make nicer error messages.
 
+=item B<meta_class_alias($to[, $from])>
+
+=item B<meta_attribute_alias($to[, $from])>
+
+Create an alias from the class C<$from> (or the current package, if
+C<$from> is unspecified), so that
+L<Moose/Metaclass and Trait Name Resolution> works properly.
+
 =back
 
 =head1 TODO