This library for Scala 2.12 provides limited compatibility with the new collection library in 2.13. We try to keep the 2.13 collections as backward compatible as possible but that is not always possible. For some of these cases this library allows you to compile sources written for a subset of the new semantics of 2.13 on 2.12.
For example, the to method is used with a type parameter in 2.12:
xs.to[List]With this compatibility library you can also use the 2.13 syntax which uses a companion object:
import scala.collection.compat._
xs.to(List)This project can be cross-built on 2.13 (with new collections) and 2.12. The 2.13 version consists only of an
empty scala.collection.compat package object that allows you to write import scala.collection.compat._ in 2.13.
The 2.13 version has the compatibility extensions in this package. It also adds backported version of some new collection
types to other scala.collection subpackages.
A tool is being developed to automatically migrate code that uses the standard collection to use the strawman.
To use it, add the scalafix sbt plugin to your build, as explained in its documentation.
The migration tool is not exhaustive and we will continue to improve it over time. If you encounter a use case that’s not supported, please report it as described in the contributing documentation.
Run the following sbt task on your project:
> scalafix github:scala/scala-collection-compat/NewCollections