Need help with ScLookupCache

[Winfried Donkers]

Hi,

I am implementing Excel function XLOOKUP in Calc (at a slow pace), and 
need some help with ScLookupCache.

Am I correct when stating that ScLookupCache currently cannot cope with 
the combinations
  eOp SC_GREATER_EQUAL and sorted in ascending order
and
  eOp SC_LESSER_EQUAL and sorted in descending order?

And if so, can anyone help me in making this possible?

Winfried