[postgis-tickets] [PostGIS] #4827: Accept NaN from WKT parser

[PostGIS]

#4827: Accept NaN from WKT parser
---------------------+---------------------------
 Reporter:  strk     |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  medium   |  Milestone:  PostGIS 3.1.1
Component:  postgis  |    Version:  master
 Keywords:           |
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 I know this is going to be controversial, but it doesn't seem good to me
 that the output of ST_AsText() cannot be read back by the WKT parser.
 Here's one such case:
 {{{
 select ST_AsText(ST_MakeLine(ST_MakePoint('NAN', 'NAN'),ST_MakePoint(0,
 0)));
 select ST_AsText(ST_MakeLine(ST_MakePoint('NAN', 'NAN'),ST_MakePoint(0,
 0)))::geometry;
 }}}

 The first statement works, outputting {{{LINESTRING(NaN NaN,0 0)}}}, the
 second statement, which tries reading that WKT back, fails with: {{{ERROR:
 parse error - invalid geometry}}}

 References #4825 as this limitation makes testing harder

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4827>
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