pub fn decode(raw: f64) -> Option<(f64, f64)>Expand description
The point a score decodes to, which is the middle of the box it names.
This never fails on anything that came out of score. It takes an f64
because that is what the sorted set holds and a score that is not a whole
number in range was not written by us.
A score is fifty two bits everywhere except at the two far edges. A point at
longitude 180 exactly scales to bucket 1 << 26, which is one past the
twenty six bits the axis has, and the same happens at the top latitude, so
those two scores carry a fifty third and a fifty fourth bit. Redis stores
them like that and reads them back the same way, so the limit here is what a
full score can reach and not what it usually is. Refusing them left GEOPOS
answering nothing for a point on the date line.