Mouse::Util::does_role() respects $thing->does() method

[gitmo/Mouse.git] / lib / Mouse / Meta / Class.pm

diff --git a/lib/Mouse/Meta/Class.pm b/lib/Mouse/Meta/Class.pm
index 622f142..ee459c3 100644 (file)
--- a/lib/Mouse/Meta/Class.pm
+++ b/lib/Mouse/Meta/Class.pm
@@ -1,7 +1,7 @@
 package Mouse::Meta::Class;
 use Mouse::Util qw/:meta/; # enables strict and warnings
 
-use Scalar::Util qw/blessed weaken/;
+use Scalar::Util ();
 
 use Mouse::Meta::Module;
 our @ISA = qw(Mouse::Meta::Module);
@@ -56,38 +56,48 @@ sub superclasses {
     if (@_) {
         foreach my $super(@_){
             Mouse::Util::load_class($super);
-
             my $meta = Mouse::Util::get_metaclass_by_name($super);
-            unless(defined $meta) {
-                # checks if $super is a foreign class (i.e. non-Mouse class)
-                my $mm = $super->can('meta');
-                if(!($mm && $mm == \&Mouse::Util::meta)) {
-                    if($super->can('new') or $super->can('DESTROY')) {
-                        $self->inherit_from_foreign_class($super);
-                    }
-                }
-                next;
-            }
-
-            if(Mouse::Util::is_a_metarole($meta)){
-                $self->throw_error("You cannot inherit from a Mouse Role ($super)");
-            }
-
-            # checks and fixes in metaclass compatiility
-            next if $self->isa(ref $meta); # _superclass_meta_is_compatible
+            next if $self->verify_superclass($super, $meta);
             $self->_reconcile_with_superclass_meta($meta);
         }
-        @{ $self->{superclasses} } = @_;
+        return @{ $self->{superclasses} } = @_;
     }
 
     return @{ $self->{superclasses} };
 }
 
+sub verify_superclass {
+    my($self, $super, $super_meta) = @_;
+
+    if(defined $super_meta) {
+        if(Mouse::Util::is_a_metarole($super_meta)){
+            $self->throw_error("You cannot inherit from a Mouse Role ($super)");
+        }
+    }
+    else {
+        # The metaclass of $super is not initialized.
+        # i.e. it might be Mouse::Object, a mixin package (e.g. Exporter),
+        # or a foreign class including Moose classes.
+        # See also Mouse::Foreign::Meta::Role::Class.
+        my $mm = $super->can('meta');
+        if(!($mm && $mm == \&Mouse::Util::meta)) {
+            if($super->can('new') or $super->can('DESTROY')) {
+                $self->inherit_from_foreign_class($super);
+            }
+        }
+        return 1; # always ok
+    }
+
+    return $self->isa(ref $super_meta); # checks metaclass compatibility
+}
+
 sub inherit_from_foreign_class {
     my($class, $super) = @_;
-    Carp::carp("You inherit from non-Mouse class ($super),"
-        . " but it is unlikely to work correctly."
-        . " Please concider to use MouseX::Foreign");
+    if($ENV{PERL_MOUSE_STRICT}) {
+        Carp::carp("You inherit from non-Mouse class ($super),"
+            . " but it is unlikely to work correctly."
+            . " Please consider using MouseX::Foreign");
+    }
     return;
 }
 
@@ -154,7 +164,7 @@ sub _collect_roles {
 }
 
 
-sub find_method_by_name{
+sub find_method_by_name {
     my($self, $method_name) = @_;
     defined($method_name)
         or $self->throw_error('You must define a method name to find');
@@ -181,6 +191,8 @@ sub get_all_method_names {
 
 sub find_attribute_by_name {
     my($self, $name) = @_;
+    defined($name)
+        or $self->throw_error('You must define an attribute name to find');
     foreach my $attr($self->get_all_attributes) {
         return $attr if $attr->name eq $name;
     }
@@ -192,7 +204,7 @@ sub add_attribute {
 
     my($attr, $name);
 
-    if(blessed $_[0]){
+    if(Scalar::Util::blessed($_[0])){
         $attr = $_[0];
 
         $attr->isa('Mouse::Meta::Attribute')
@@ -223,7 +235,7 @@ sub add_attribute {
         }
     }
 
-    weaken( $attr->{associated_class} = $self );
+    Scalar::Util::weaken( $attr->{associated_class} = $self );
 
     # install accessors first
     $attr->install_accessors();
@@ -231,7 +243,7 @@ sub add_attribute {
     # then register the attribute to the metaclass
     $attr->{insertion_order}   = keys %{ $self->{attributes} };
     $self->{attributes}{$name} = $attr;
-    delete $self->{_mouse_cache}; # clears internal cache
+    $self->_invalidate_metaclass_cache();
 
     if(!$attr->{associated_methods} && ($attr->{is} || '') ne 'bare'){
         Carp::carp(qq{Attribute ($name) of class }.$self->name
@@ -403,8 +415,7 @@ sub add_override_method_modifier {
         local $Mouse::SUPER_PACKAGE = $package;
         local $Mouse::SUPER_BODY    = $super_body;
         local @Mouse::SUPER_ARGS    = @_;
-
-        $code->(@_);
+        &{$code};
     });
     return;
 }
@@ -421,10 +432,10 @@ sub add_augment_method_modifier {
     my $super_package = $super->package_name;
     my $super_body    = $super->body;
 
-    $self->add_method($name => sub{
+    $self->add_method($name => sub {
         local $Mouse::INNER_BODY{$super_package} = $code;
         local $Mouse::INNER_ARGS{$super_package} = [@_];
-        $super_body->(@_);
+        &{$super_body};
     });
     return;
 }
@@ -459,7 +470,7 @@ Mouse::Meta::Class - The Mouse class metaclass
 
 =head1 VERSION
 
-This document describes Mouse version 0.73
+This document describes Mouse version 0.95
 
 =head1 DESCRIPTION