CODEWITHSUNDEEP
scalauser-defined-typescompanion-object
D.L.
D.L.

Reputation: 169

Scala Error: type exists, but it has no companion object

I have defined a type inside a package object as following in package.scala. 

type Structure = List [(int, int)]

Now I want to use this Structure inside a class in abc.scala and get the elements of the list individually. abc.scala and package.scala are inside the same folder (src/utility).

class abc (d: Structure) {
  val a = d._1
  val b = d._2
  ...................
  ...................
}

It compiles, but I need to try a test inside another folder (test). I have imported the package utility in the test code as follows.

import utility._
class test {
  val a = utility.Structure ((1, 2), (2, 5))
  ............................
  ............................
}

I am getting the following error:
object Structure is not a member of package src.utility.
Note: type Structure exists, but it has no companion object.

How do I define the companion object of the type? I need to use the type in the class abc.

Upvotes: 3

Views: 3220

Answers (1)

sabee
sabee

Reputation: 217

So, it sounds like you have something like this:

package src
package object utility {
  type Structure = List[(Int, Int)]
}

To get what you want, simply add val Structure = List. So, it'd look like this:

package src
package object utility {
  type Structure = List[(Int, Int)]
  val Structure = List
}

Now, Structure((1, 2)) will work as long as you import your package.

Upvotes: 3

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