Trait glib::object::IsA[][src]

pub unsafe trait IsA<T: StaticType + UnsafeFrom<ObjectRef> + Wrapper>: StaticType + Wrapper + Into<ObjectRef> + UnsafeFrom<ObjectRef> + for<'a> ToGlibPtr<'a, *mut <T as Wrapper>::GlibType> { }

Declares the "is a" relationship.

Self is said to implement T.

For instance, since originally GtkWidget is a subclass of GObject and implements the GtkBuildable interface, gtk::Widget implements IsA<glib::Object> and IsA<gtk::Buildable>.

The trait can only be implemented if the appropriate ToGlibPtr implementations exist.

T always implements IsA<T>.