Some expand operators not working as expected

[mholck]

Using some of the examples from the CQL Specification some of the expand operators seem to be incorrect or unable to resolve

expand { Interval[@2018-01-01, @2018-01-04] } per 2 days
is expanding out to
[Interval[2018-01-01, 2018-01-03), Interval[2018-01-03, 2018-01-05), Interval[2018-01-05, 2018-01-07)]
Note the extra interval at the end

expand { Interval[10.0, 12.5] } per 1
throws exception Could not resolve call to operator Expand with signature (list<interval<System.Decimal>>,System.Integer)

expand { Interval[10, 10] } per 0.1
throws exception Could not resolve call to operator Expand with signature (list<interval<System.Integer>>,System.Decimal)

expand { Interval[1, 10] } per 2
throws exception Could not resolve call to operator Expand with signature (list<interval<System.Integer>>,System.Integer)

expand { Interval[@T10, @T10] } per minute
is returning null rather than { }

[cmoesel]

Hi @mholck -- which CQL engine are you using?

[mholck]

1.5
These issues were discovered when updating the tests in cql-engine to try and get all CqlIntervalOperators tests working

[mholck]

They also fail in Atom using the language-cql 2.11.1 plugin