Github user koertkuipers commented on the issue:
https://github.com/apache/spark/pull/15918
It can be done with shapeless (which perhaps uses macros under hood, I
don't know).
On Dec 1, 2016 19:56, "Michael Armbrust" <[email protected]> wrote:
I don't think you can limit the implicit. What type would pick up case
classes, but not case classes that contain invalid things? I think you
would need a macros for this kind of introspection. (I'd be happy to be
proven wrong with a PR.)
I'd recommend you only import the implicits you need rather than using the
wildcard.
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