Pre SIP: Named tuples

Language Design
186

this one is possible as long as the type is known at the call-site (you can use constValueTuple method to reflect the names to a value) e.g.

inline def pairs[N <: Tuple, V <: Tuple](nt: NamedTuple[N, V]): Unit =
  val names = constValueTuple[N]
  names.zip(nt.toTuple).toList.foreach(println)

scala> pairs((x = 3, y = 7))
(x,3)
(y,7)
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