scalac -Yrewrite:collectionSeq

[retronym]

package foo
package bar

import scala.collection.immutable

class Test {
  val x: collection.Seq[collection.Seq[Int]] = collection.Seq(collection.Seq(1, 2, 3))
  def needsQualification(collection: String): collection.Seq[Int] = {
    collection.Seq(1)
  }

  def needsQualification2 {
    object X { val collection = ""}
    import X._
    scala.collection.Seq(1)
  }

  val ss: Set[String] = List(1).map(_.toString)(collection.breakOut[List[Int], String, Set[String]])

  def needsQualificatiomn3 {
    val ls = List(1)
    val ss: Set[String] = {
      val List, Set, String = ""
      type List = Nothing
      type Set = Nothing
      type String = Nothing
      ls.map(_.toString)(collection.breakOut[scala.collection.immutable.List[Int], java.lang.String, scala.Predef.Set[scala.Predef.String]])
    }
  }

}

$ cp /tmp/input.scala /tmp/rewrite.scala && ~/code/scala/build/quick/bin/scalac -Yrewrites:collectionSeq /tmp/rewrite.scala && cat /tmp/rewrite.scala

package foo
package bar

import scala.collection.immutable

class Test {
  val x: collection.Seq[collection.Seq[Int]] = collection.Seq(collection.Seq(1, 2, 3))
  def needsQualification(collection: String): collection.Seq[Int] = {
    collection.Seq(1)
  }

  def needsQualification2 {
    object X { val collection = ""}
    import X._
    scala.collection.Seq(1)
  }

  val ss: Set[String] = List(1).map(_.toString)(collection.breakOut[List[Int], String, Set[String]])

  def needsQualificatiomn3 {
    val ls = List(1)
    val ss: Set[String] = {
      val List, Set, String = ""
      type List = Nothing
      type Set = Nothing
      type String = Nothing
      ls.map(_.toString)(collection.breakOut[scala.collection.immutable.List[Int], java.lang.String, scala.Predef.Set[scala.Predef.String]])
    }
  }

}