[Oberon] CASE without ELSE

The increase in size of the compiler sources is about 250 lines of code, i.e. an increase of 7%. It is a non-trivial addition.

That’s pretty significant relative to the size of the Oberon compiler (in other languages it would be considered negligible)

Compiles are typically about 10% faster after implementing the PO2013 Oberon compiler scanner function ORS.Get as a CASE statement.

In other compilers a 10% speedup would be quite noticeable (one coffee less to grab during compilation), but not in Oberon where compilation already is near-instantaneous. PS: I believe this is the only place in the Oberon system where one would see a measurable performance gain (here 10%) speedup (correct me if I’m wrong)