Own type for null?

[Benjamin Thaut]

Am 26.10.2011 10:56, schrieb Timon Gehr:
> On 10/26/2011 07:49 AM, Benjamin Thaut wrote:
>> I recently tried to replace the deprecated overloading of new and delete
>> and came across a serious issue. You can not use std.conv.emplace with
>> null. If you pass null to it, null loses it's implicit casting
>> cabablities and just becomes a void*.
>> This issue pretty much exists with every template. As soon as you pass
>> null to a template (compile time) information gets lost.
>>
>> Besides fixing std.conv.emplace it could be really handy to be able to
>> check for a null-type at compile time for example with non-nullable
>> types.
>>
>> There is already a enhancement reqeust in bugzilla since January but it
>> didn't get much attention yet:
>> http://d.puremagic.com/issues/show_bug.cgi?id=5416
>>
>> Would this be a worthwile improvement for the langauge?
>
> ++vote.
>
> We also need an own type for the empty array literal '[]' btw.

Do you have an example where a own type for [] would be usefull?

-- 
Kind Regards
Benjamin Thaut