Extend D's switch statement?

[Vlad Levenfeld via Digitalmars-d]

On Thursday, 9 July 2015 at 16:08:37 UTC, Timon Gehr wrote:
> On 07/09/2015 04:17 PM, Timon Gehr wrote:
>> On 07/09/2015 02:54 PM, rsw0x wrote:
>>> ...
>>> someone was willing to produce.
>>
>> Someone is often willing to produce awkward language quirks, 
>> so I think
>> being critical of new additions has some value.
>
> E.g.
>
> "Note: Cannot swap values by tuple assignment.
>
> int x = 1, y = 2;
> {x, y} = {y, x};
> // Lowered to:
> // x = y, y = x;
> assert(y == 2);
> assert(x == 2);"
>
> No, please.

Couldn't this could be detected at compile-time and temporary 
variables created?