Optimize Scala pattern matching for Java enumeration with @switch

Question

I have the following problem: We have a shared scala-java-project (with members who only write java code), therefore we use java enumerations for one purpose. But now I want to perform pattern matching in scala on this enumeration, and optimize it with @switch, since the java switch actually can use enums.

But the compiler only complains:

error: could not emit switch for @switch annotated match
(args.tileType: @switch) match {

where tiletype is the field which contains one of the enum values. How to fix that the code can be optimized?

Answer 1

You use Java.

Scala contains only approximately the minimum necessary to be able to read Java enums. You can't create or optimizedly use them in Scala at present (through 2.10).