overriding types with class_type or role_type should die too

diff --git a/lib/Moose/Util/TypeConstraints.pm b/lib/Moose/Util/TypeConstraints.pm
index c436d61..6e4e2fa 100644 (file)
--- a/lib/Moose/Util/TypeConstraints.pm
+++ b/lib/Moose/Util/TypeConstraints.pm
@@ -155,6 +155,15 @@ sub create_class_type_constraint {
 #find_type_constraint("ClassName")->check($class)
 #    || __PACKAGE__->_throw_error("Can't create a class type constraint because '$class' is not a class name");
 
+    if (my $type = $REGISTRY->get_type_constraint($class)) {
+        my $pkg_defined_in = scalar( caller(1) );
+        _confess(
+            "The type constraint '$class' has already been created in "
+          . $type->_package_defined_in
+          . " and cannot be created again in "
+          . $pkg_defined_in )
+    }
+
     my %options = (
         class => $class,
         name  => $class,
@@ -175,6 +184,15 @@ sub create_role_type_constraint {
 #find_type_constraint("ClassName")->check($class)
 #    || __PACKAGE__->_throw_error("Can't create a class type constraint because '$class' is not a class name");
 
+    if (my $type = $REGISTRY->get_type_constraint($role)) {
+        my $pkg_defined_in = scalar( caller(1) );
+        _confess(
+            "The type constraint '$role' has already been created in "
+          . $type->_package_defined_in
+          . " and cannot be created again in "
+          . $pkg_defined_in )
+    }
+
     my %options = (
         role => $role,
         name => $role,