CODEWITHSUNDEEP
scalaanonymous-class
LaloInDublin
LaloInDublin

Reputation: 5449

Multiple Trait construction error in Scala

could someone please help me understand the error here? I think I understand anonymous class construction with traits in Scala. However, when I try to apply more than one trait I get an error expecting ";" or essential end of statement. The same problem seems to apply if I declare a class this way as well (with multiple traits that require anonymous implementation lines of code ? Line Test 3 fails below. Thank you.

class TestTraits 

trait A {def x:Int}
trait B {def y:Int}



object TestTraits {

  def main(args: Array[String]): Unit = {

     val test1 = new TestTraits with A {def x=22}  //OK

     val test2 = new TestTraits with B {def y=33} //OK

     val test3 = new TestTraits with A {def x=22} with B {def y=33} //Errors: - ';' expected but 'with' 


  }  
}

Upvotes: 2

Views: 179

Answers (1)

oxbow_lakes
oxbow_lakes

Reputation: 134280

Your syntax is invalid:

val test3 = new TestTraits with A with B {def x=22; def y=33}

A class definition can only have one body and what you are declaring is an anonymous class.

Upvotes: 5

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