[Issue 13179] AA key type TagIndex now requires equality rather than comparison

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13179

--- Comment #1 from Jacob Carlborg <doob at me.com> ---
Reduced test case:

struct TagIndex
{
    uint tag, index;

    const int opCmp(ref const TagIndex o)
    {
        if (tag == o.tag && index == o.index)
            return 0;
        if (tag > o.tag)
            return 1;
        if (tag < o.tag)
            return -1;
        if (index > o.index)
            return 1;
        if (index < o.index)
            return -1;
        assert(0);
    }
}

int[TagIndex] a;

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