Extract to case-class-like types

[propensive]

We should generalize extraction of case-class types to any type which has a factory-like apply method on its companion object (for which all parameters are types which are extractable).

We could also investigate support for serializing to types with unapply methods.

[cb372]

Just to add some background, I'm trying to deserialize JSON into classes that have been generated from a Thrift definition by Scrooge. So the code looks like https://gist.github.com/cb372/2d19d5f84af39f4edcd5

[cb372]

By the way we fixed json4s to handle this. See json4s/json4s#288 and json4s/json4s#293

[propensive]

Ah, cool - thanks for letting me know!

[propensive]

I'll keep this open, because I'd still like to have the feature, though...