scalax.collection.OuterElems.scala Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of graph-core_2.13 Show documentation

Graph Core

The newest version!

package scalax.collection

import scalax.collection.generic.Edge

/** Represents parameters that are accepted when calling `Graph(...)`.
  * @tparam N  the type of the nodes (vertices)
  * @tparam E  the kind of the edges (links)
  */
trait OuterElems[N, E <: Edge[N]] {

  /* omitting `sealed` resolves "match may not be exhaustive" warnings because compiler adds `outer` reference.
   * See also https://groups.google.com/g/scala-internals/c/vw8Kek4zlZ8?pli=1
   */
  trait OuterElem

  /** Wraps any type to be accepted when calling `Graph(...)`. */
  sealed case class OuterNode(node: N) extends OuterElem

  /** To be mixed in by edge classes to allow passing them to `Graph(...)`. */
  sealed case class OuterEdge(edge: E) extends OuterElem
}