rvalues -> ref (yup... again!)

[Kagamin]

On Friday, 23 March 2018 at 22:01:44 UTC, Manu wrote:
> By contrast, people will NOT forgive the fact that they have to 
> change:
>
>     func(f(x), f(y), f(z));
>
> to:
>
>     T temp = f(x);
>     T temp2 = f(y);
>     T temp3 = f(z);
>     func(temp, temp2, temp3);
>
> That's just hideous and in-defensible.
>
> A better story would be:
>
>     func(f(x), f(y), f(z));
> =>
>     func(x.f, y.f, z.f);

Another workaround:

auto r(T)(T a)
{
     struct R { T val; }
     return R(a);
}
void f(in ref int p);
int main()
{
     f(1.r.val);
     return 0;
}