Why can't we derive struct's?

[12345swordy]

On Thursday, 20 December 2018 at 16:10:39 UTC, H. S. Teoh wrote:
> On Thu, Dec 20, 2018 at 03:44:34PM +0000, 12345swordy via 
> Digitalmars-d wrote:
>> On Thursday, 20 December 2018 at 15:29:50 UTC, H. S. Teoh 
>> wrote:
>> > On Thu, Dec 20, 2018 at 12:15:53AM -0800, Manu via 
>> > Digitalmars-d wrote:
>> > > [...]
>> > [...]
>> > > [...]
>> > [...]
>> > 
>> > Sigh... when is multiple alias this ever going to happen??
>> > 
>> > 
>> > T
>> 
>> When IgorStepanov quit disappearing on us. 
>> https://github.com/dlang/dmd/pull/8378
> [...]
>
> IIRC, that PR was blocked because of disagreements over how 
> ambiguous symbols over multiple alias this types would be 
> resolved.  Somebody needs to come up with a DIP with 
> well-defined semantics for all the details and corner cases 
> before this can move forward.
>
>
> T
Then DIP 66 have failed and needs to be rejected.

Alex