ST_GeomFromText should understand ISO WKT

[strk]

Following #287 we should make ST_GeomFromText symmetric in accepting the ISO WKT for higher dimensions.

[strk]

Uff...:

SELECT St_GeomFromText(ST_AsText(g::geometry))
FROM ( SELECT 'POINT ZM (0 0 0)' ::text as g ) as foo;

ERROR:  can not mix dimensionality in a geometry
HINT:  "POINT ZM (0 0 0)" <-- parse error at position 16 within geometry

[strk]

Ah, all fine, 'POINT ZM (0 0 0)' is actually a broken syntax :)

[strk]

Ok, this is a real bug:

select 'GEOMETRYCOLLECTION Z (MULTILINESTRING Z ((0 0 5, 2 0 5),(1 1 5, 2 2 5)))'::geometry;
ERROR:  can not mix dimensionality in a geometry

The MULTILINESTRING Z on itself is parsed right.

[strk]

The version with M instead of Z is also fine !

[strk]

It looks like wkt_dimensionality is getting confused by the double Z...

wkt_parser_collection_finalize enter: flagdims:4, dimensionality:Z (MULTILINESTRING Z ((0 0 5, 2 0 5),(1 1 5, 2 2 5)))

[strk]

Fixed with r8788. The GeomFromText? function was actually fine, but there were bugs in underlying liblwgeom parser. Now fixed, and everything put under regression testing at both cunit and postgis levels.