ENH: Add usage of new sorting dtype slots #109
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Note: this PR depends on numpy/numpy#28516 and will break without it.
This is to start writing some examples for the new sorting slots in numpy/numpy#28516. Currently, just a patch to use the new
sort_compare
slot for mpfdtype: this is the only place I found sorting-related features to be implemented already but there's probably ways we can optimize it further for the various dtypes.I realize this is a bit spares right now, mainly because I wonder if any further optimizations are called for in
get_sort_function
itself. One could reimplement quicksort, for example, and I can see a case for things like bucketing by sign or exponent. Not sure if that would be too complex for now. But if we don't, we don't have an example for most of the slots...