Why traits doesn't supports interfaces (via implements) like classes does?
It could be useful when trait implements part of abstract functions from
interface, then the class that uses this traits should implements the
another part.
It could turn it possible (pseudo-code):
interface VisibilityControlContract
- public function isVisible(): bool;
trait VisibilityControlTrait implements VisibilityControlContract
- public function isVisible(): bool { ... }
class UserModel (not need implements VisibilityControlContract directly)
- uses VisibilityControlTrait;
var_dump(new UserModel instanceof VisibilityControlContract); // true
The disvantages that I can see with that is that without an IDE I could not
identify easily if interface was implemented by some trait. But it too
happen when I do implements an abstract class that implements some
interface.
--
David Rodrigues
