Instantiating a case class from a list of parameters
You could use pattern matching like:
params match {
case List(x:Int, y:String, d:Double) => Foo(x,y,d)
}
scala> case class Foo(a: Int, b: String, c: Double)
defined class Foo
scala> val params = Foo(1, "bar", 3.14).productIterator.toList
params: List[Any] = List(1, bar, 3.14)
scala> Foo.getClass.getMethods.find(x => x.getName == "apply" && x.isBridge).get.invoke(Foo, params map (_.asInstanceOf[AnyRef]): _*).asInstanceOf[Foo]
res0: Foo = Foo(1,bar,3.14)
scala> Foo(1, "bar", 3.14) == res0
res1: Boolean = true
Edit: by the way, the syntax so far only being danced around for supplying the tuple as an argument is:
scala> case class Foo(a: Int, b: String, c: Double)
defined class Foo
scala> Foo.tupled((1, "bar", 3.14))
res0: Foo = Foo(1,bar,3.14)