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scalatype-parameter

Instantiate class with type parameters with the type of a variable in Scala

I’ve got the following types

class Translator[To <: Language] { ... }
abstract class Language
object English extends Language
object German extends Language

Is there a way to instantiate Translator from a val that is either of type English or German?

I’m looking for something like the following (which doesn’t work):

val lang = if (someCondition) English else German
val translator = new Translator[classOf[lang]]
Solution

  • use the language as type argument in Translator constructor:

    class Translator[To <: Language](lang:To) {...}
abstract class Language
object English extends Language
object German extends Language

new Translator(German)
res7: Translator[German.type] = Translator@8beab46

// using class instead of object:
class Italian extends Language
new Translator(new Italian)
res9: Translator[Italian] = Translator@6bc22f58