Where does Scala store information that cannot be represented in Java?

Question

There are some constructs that don't have equivalents in java. Examples would be

• named parameters
• instance private members

Where/How does Scala store the information necessary for this stuff (some kind of flag in the first case, the parameter names in the second case?

If I get it right this has to get stored in the byte code, since it works even if I just have a compiled library without the source code!?

Answer 1

This information is captured in an annotation named ScalaSig in the class file (see this answer for an example).

You can view the (not very human-friendly) annotation with javap -verbose, or parse it using an internal API, but in general neither should be necessary.