[scalding] Automatic tupling of functions?

[Vesa Muhonen]

Hi

I was wondering whether it would be possible to have (some) operations in the type-safe API to apply Scala 'tupled' by default or some easy way. Writing a code like this

pipe.filter { i => i._2 == "bar" }

definitely works but can be somewhat obscure. As an alternative this would work

pipe.filter { case (_, foo, _) => foo == "bar" }

One can use Function.tupled to make it look like this

pipe.filter { tupled ((_, foo, _) => foo == "bar") }

but still looks a bit cluttered to me. If it would be possible to have filter automatically accept functions with several arguments you could just write

pipe.filter { (_, foo, _) => foo == "bar" }

which to me looks cleanest. Or if automatically is tricky one could think of

pipe.tfilter { (_, foo, _) => foo == "bar"

However, at this point I have mostly exhausted my detailed knowledge of Scala and Scalding internals and don't know if this actually makes sense or is possible to implement is any reasonable way... Would this make any sense?

Cheers,
Vesa