Multiple alias this, what's the hold up?

[Ali Çehreli]

On 06/15/2019 11:08 PM, Walter Bright wrote:
> On 6/15/2019 6:21 PM, Timon Gehr wrote:
>> In terms of lookup, the issues with multiple alias this are the same 
>> as the issues with multiple import declarations. Implicit conversions 
>> could use the same lookup rules, but there would need to be a way to 
>> disambiguate. The code in the compiler that implements import 
>> declarations is unlikely to be easily reusable.
> 
> Multiple alias this is multiple inheritance. Generally, if you find 
> yourself wanting multiple inheritance, it's likely time to rethink the 
> data structures.

Does this mean multiple alias this will never happen?

I would love to remove a section in my book that was added in the hopes 
of seeing this feature "any day now". :)

I like the example I came up with though: A TeachingAssistant class that 
can appear in a Student context as well as in a Teacher context.

Ali