...saying that C++ doesn't do implicit conversions all over the place (or that D...

"at the same time implicit conversions and type deduction"

Quoted comment from TDPL is related...

...attempt
combinatorially at the same time implicit conversions and type deduction is a dicey proposition...

I had started to think about "alias this" as C++'s implicit conversion operator. And...

Slightly changed original code

struct Wrap(T)
{
    T t;
}

struct S
{
    int id;

    Wrap!S...

Okay. I had thought of "alias this" as *merely* implicit conversion. But it really makes...

...alias this' is also for automatic type conversions. TommiT's had implemented 'operator Wrap<Teddy...

C++ doesn't have alias this. The behavior that it should be simulating is inheritance...

That should be:
Teddy ted {123};

...attempt combinatorially at the same time implicit conversions and type deduction is a dicey proposition...