Parsing issues with some temporal functions

[ecombelles-csgroup]

Using the CQL2 parser with a temporal function having a list of properties as an "interval" value doesn't work.

For example, working with the CQL2 parser I tried a request with this kind of filter, and it failed during parsing:

{
    "op": "t_contains",
    "args": [
        {"interval": [{"property": "start_datetime"}, {"property": "end_datetime"}]},
        {"interval": ["2000-01-01T00:00:00Z", "2000-01-01T00:00:01Z"]},
    ]
}

This kind of filter corresponds to one of those described here: https://docs.ogc.org/is/21-065r2/21-065r2.html#_conformance_test_41
It appears that the parser doesn't expect anything else than string values for the interval arg, while it should also be able to handle a pair of properties.

[vprivat-ads]

@ecombelles-csgroup it looks like the pycql2 lark schema has a definition closer to the spec:
https://github.com/eseglem/pycql2/blob/main/pycql2/cql2.lark#L296