Question

scala> val two = (1,2)
two: (Int, Int) = (1,2)

scala> val one = (1,)
<console>:1: error: illegal start of simple expression
       val one = (1,)
                    ^

scala> val zero = ()
zero: Unit = ()

Is this:

val one = Tuple1(5)

really the most concise way to write a singleton tuple literal in Scala? And does Unit work like an empty tuple?

Does this inconsistency bother anyone else?

Answer 1

really the most concise way to write a singleton tuple literal in Scala?

Yes.

And does Unit work like an empty tuple?

No, since it does not implement Product.

Does this inconsistency bother anyone else?

Not me.