org.wartremover.warts.LeakingSealed.scala Maven / Gradle / Ivy
package org.wartremover
package warts
object LeakingSealed extends WartTraverser {
def apply(u: WartUniverse): u.Traverser = {
import u.universe._
import u.universe.Flag._
new u.Traverser {
override def traverse(tree: Tree): Unit = {
tree match {
// Ignore trees marked by SuppressWarnings
case t if hasWartAnnotation(u)(t) =>
case t @ ClassDef(mods, _, _, _)
if !mods.hasFlag(FINAL) && !mods
.hasFlag(SEALED) && t.symbol.asClass.baseClasses.exists(_.asClass.isSealed) =>
error(u)(tree.pos, "Descendants of a sealed type must be final or sealed")
super.traverse(tree)
case _ =>
super.traverse(tree)
}
}
}
}
}