On Wed, May 03, 2017 at 08:24:31PM +0200, ag0aep6g via Digitalmars-d-learn wrote: > On 05/03/2017 08:04 PM, H. S. Teoh via Digitalmars-d-learn wrote: > > You only need a common interface if you wish to do something more > > with Box!X instantiations that's common across all Boxes. > > The goal is to return `true` for two empty boxes with different > payload types. From the OP: "Empty boxes are equal no matter the > type."
Ah, I missed that part. In that case, yes, you'll need an interface with an isEmpty() method as you described. T -- Живёшь только однажды.
