"alias that this" or "alias this : that"

[Daniel Kozak]

On Friday, 7 February 2014 at 20:48:37 UTC, Tofu Ninja wrote:
> On Friday, 7 February 2014 at 07:52:22 UTC, Meta wrote:
>> On Friday, 7 February 2014 at 07:36:57 UTC, Mike wrote:
>>> Can someone please clarify for me which of these is the 
>>> "preferred" syntax?
>>>
>>> alias that this;
>>> alias this : that;
>>>
>>> The documentation here 
>>> (http://dlang.org/class.html#AliasThis) doesn't mention the 
>>> latter.  I'll do the unrewarding work of updating the docs if 
>>> someone could just please tell me which syntax the core 
>>> language folks prefer.
>>>
>>> Thanks.
>>> Mike
>>>
>>> For context:
>>> https://github.com/D-Programming-Language/dmd/pull/1413
>>> https://github.com/D-Programming-Language/dmd/pull/1685
>>
>> `alias this : that` was discussed but has never been 
>> implemented, so currently the only way to do it is `alias that 
>> this`.
>
> Is alias this = that not a thing? If not, why?
Because
alias this = that;
alias this = anotherThat;

is wierd