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Possible Scala 2.13 regression - Seq semantics changed #218

Sciss opened this Issue Dec 14, 2018 · 2 comments


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Sciss commented Dec 14, 2018

So now unqualified

def parse(args: Seq[String], init: C): Option[C]

suddently means

def parse(args: scala.collection.immutable.Seq[String], init: C): Option[C]

And consequently the standard case of passing in the Array[String] from main creates a problem:

Warning:(61, 30) method copyArrayToImmutableIndexedSeq in class LowPriorityImplicits2 is deprecated (since 2.13.0): Implicit conversions from Array to immutable.IndexedSeq are implemented by copying; Use the more efficient non-copying ArraySeq.unsafeWrapArray or an explicit toIndexedSeq call
  val config  = parser.parse(args, Config()) getOrElse sys.exit(1)

So it should probably be qualified as scala.collection.Seq to match Scala 2.11 and 2.12 behaviour.


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eed3si9n commented Dec 14, 2018

Sounds good. Would you like to send a PR for this?


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eed3si9n commented Dec 17, 2018

I just sent #221

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