how to pass enums in params?

[armijnhemel]

Right now I am working on a spec where there are two data structures that are identical. The only difference is that they both use a different enum (with overlapping values, so I cannot merge them). I want to use params for this, so something like:

type_a:
  params:
    - id: tag_enums
  seq:
    - id: tag
      enum: tag_enums

but this doesn't seem to work. What am I doing wrong?

[generalmimon]

The only difference is that they both use a different enum (with overlapping values, so I cannot merge them). I want to use params for this

You can't. It would be nice to be able to define a "template" type and reuse it while one of the inside field has a variable type (or variable enum, makes a little difference), but in statically-typed languages this can be done relatively easily only at compile time (unlike params, which support expressions, are evaluated at run time and there's no problem with that). So we'll need to introduce a new concept of type templates/generics (#135) into the KS language.

In principle, we need something like this: https://stackoverflow.com/a/2024351

[armijnhemel]

Thanks, would indeed be good to have. In the meantime I will just have to put up with some duplication.