opApply and const

[Janice Caron]

On 12/9/07, Bill Baxter <dnewsgroup at billbaxter.com> wrote:
> const int opApply(int delegate(ref const T)) {...}

And "ref const T" seems a bit of an oxymoron anyway.

I can bring it down to eight. You shouldn't have to deal with
invariant classes. These can't really exist in D, since

    invarant C = new C;

will fail to compile, and there is no "inew".

But yeah - eight versions of the same function is too much. Is there
any way we can narrow it down to one? (One that actually works, in all
eight cases?)