[Issue 24516] qualifiers lost when tupleof is aliased

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24516

Nick Treleaven <nick at geany.org> changed:

           What    |Removed                     |Added
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                 CC|                            |nick at geany.org

--- Comment #1 from Nick Treleaven <nick at geany.org> ---
> S.tupleof

I don't think it makes sense to allow `tupleof` to be a type property. It
should be instance only. The spec does not mention its use on a type.
https://dlang.org/spec/class.html#tupleof

Also in dmd/typesem.d, dotExp:
```d
        else if (ident == Id._tupleof)
        {
            if (e.isTypeExp())
            {
                error(e.loc, "`.tupleof` cannot be used on type `%s`",
mt.toChars);
                return ErrorExp.get();
            }
```
For some reason that is not being triggered.

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