opIndex vs. opSlice for empty slices

[weaselcat via Digitalmars-d-learn]

On Friday, 22 May 2015 at 05:47:28 UTC, Mike Parker wrote:
> I've always used opSlice to produce empty slices, but having 
> recently read the documentation at [1], I see this:
>
> "To overload a[], simply define opIndex with no parameters:"
>
> And no mention that opSlice can fill the same role. Am I right 
> to infer that we should prefer opIndex over opSlice for this? 
> If so, what's the rationale?
>
>
> [1] http://dlang.org/operatoroverloading.html#slice

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