Question

Having a problem with Scala import. I have an import problem with two classes. The first one:

package org.world
import org.gui.tokens.Token


object WorldObject {

}

abstract class WorldObject[A <: WorldObject[_]](var xPos: Float, var yPos: Float) {
  def x = xPos
  def y = yPos

  def token: Token
             ^^^^^
  def move(dx: Float, dy: Float) {// : A = new A(x + dx, y + dy)
    xPos += dx // = x + dx
    yPos += dy
  }
}

and the second one:

package org.gui.tokens

object Token {

}

And the problem is that the return type of def token: Token is underlined in red with error saying

not found: type Token

All is fine with class locations. Other classes have no similar problems. I do not remember such a situation in Java, autoimport always worked perfectly. Here it only adds the import org.gui.tokens.Token statement repeatedly in the WorldObject file over and over again… why is that? What can I do about it?

Answer 1

Token is an object, so saying def token: Token makes about as much sense to the compiler as saying def token: 5 or def token: "Hello".

You either mean def token = Token, if you want to return the Token object; or you mean class Token {}; object Token extends Token {} in your tokens file, so there really is a class named Token, or you mean def token: Token.type, which means that the method must return something of the type of the object Token. (But there’s not much point, since the object Token is the only thing with the type Token.type.)