errors4s / errors4s-core-cats

BSD 3-clause "New" or "Revised" License GitHub

Cats Instances For Errors4s Core Types

Scala versions: 3.x 2.13 2.12

Errors For Scala (Core) Cats Instances


The Scaladoc for errors4s-core-cats may be viewed here.


This project provides cats typeclass instances for errors4s-core types.


Add this to your libraryDependencies in your build.sbt.

    "org.errors4s" %% "errors4s-core-cats" % ""
import cats._
import cats.syntax.all._
import org.errors4s.core._
import org.errors4s.core.cats.instances._

val nes: NonEmptyString = NonEmptyString("A nonempty string")
// nes: NonEmptyString = A nonempty string
// res0: String = A nonempty string

nes === nes
// res1: Boolean = true

nes < nes
// res2: Boolean = false

Version Support Matrix

This project uses Package Versioning Policy (PVP). This is to allow long term support (see this discussion). This table lists the currently supported, upcoming, and recently end of life versions.

If you need support for a version combination which is not listed here, please open an issue and we will endeavor to add support for it if possible.

Version Errors4s Core Cats Version Scala 2.11 Scala 2.12 Scala 2.13 Scala 3.0
1.0.x.x 1.0.x.x 2.x.x No Yes Yes Yes