getOverloads order

[IchorDev]

On Thursday, 13 July 2023 at 10:53:49 UTC, Dennis wrote:
> On Thursday, 13 July 2023 at 08:03:02 UTC, IchorDev wrote:
>> I've noticed that `__traits(getOverloads)` always returns the 
>> overloads in lexical order across DMD, LDC, and GDC. Is this 
>> reliable at all?
>
> No. It depends on the order the compiler analyzes the symbols, 
> which is often lexical order, but it can vary based on static 
> if, mixin, forward references etc. Here's a counter example:
>
> ```D
>        void f(int  x);
> mixin("void f(float y);");
>        void f(char z);
> ```
>
> Here you get overloads of `f` in the order (x, z, y) instead of 
> (x, y, z).

Well that makes sense, but also wouldn't apply to the use-case 
that I was considering, since all the code would be in one mixin. 
However, the spec doesn't specify that this is how `getOverloads` 
**must** work; is this guaranteed behaviour but the spec simply 
omits it?