Re: Fastest way to check if the bottom-class of a class reference is any of a set of classes

[Per Nordlöw via Digitalmars-d-learn]

On Monday, 16 December 2019 at 18:01:06 UTC, Steven Schveighoffer 
wrote:
I'd compare the typeid directly:

auto tid = typeid(object);
return(tid is typeid(X) || tid is typeid(Y) || tid is typeid(Z) 
|| ...)

If you are doing a cast(const(X))object, what you are doing is 
each time traversing the linked-list of typeids anyway doing 
the same as the above, but doing extra work. So this should be 
faster.

-Steve

Great. Thanks.

Because we're only interested in non-abstract classes I adjusted 
your code to

    static foreach (Type; AliasSeq!(...))
    {
        static assert(!__traits(isAbstractClass, Type));
        if (zingid is typeid(Type)) { return true; }
    }