Pseudo namespaces

[Tofu Ninja via Digitalmars-d]

On Friday, 4 December 2015 at 02:02:48 UTC, Timon Gehr wrote:
> On 12/04/2015 02:37 AM, Mike wrote:
>> On Friday, 4 December 2015 at 01:04:33 UTC, Idan Arye wrote:
>>>
>>> People are going to hate me, but 
>>> http://dpaste.dzfl.pl/851d1d1f5e4b
>>
>> Doesn't seem to scale to member access: 
>> http://dpaste.dzfl.pl/37193377524c
>>
>> /d649/f987.d-mixin-3(7): Error: 'this' is only defined in 
>> non-static
>> member functions, not fun
>>
>> Is there a way to make it work?
>>
>> Mike
>
> template namespace(string code,alias a=void){
>     mixin(code);
> }
>
> struct List{
>     int x;
>     alias stable = namespace!(q{
>         void fun(){
>             import std.stdio;
>             writeln(this.x);
>         }
>     },x);
> }
>
> void main(){
>     List lst;
>     lst.stable.fun();
> }
>
>
> :o)

WTF! Why does that even work! That is strait madness! When the 
code gets mixed into the namespace template, x would have been 
re-aliased to a, it would have made sense to write "writeln(a)" 
which works as well... but "writeln(this.x)", wut, how... that 
makes no sense...