Practicalities

If you’d like to set up a project that uses the libraries presented in this book, you will need to use a recent version of Scala with FP-specific features enabled (e.g. in build.sbt):

  scalaVersion in ThisBuild := "2.12.6"
  scalacOptions in ThisBuild ++= Seq(
    "-language:_",
    "-Ypartial-unification",
    "-Xfatal-warnings"
  )
  
  libraryDependencies ++= Seq(
    "com.github.mpilquist" %% "simulacrum"     % "0.13.0",
    "org.scalaz"           %% "scalaz-core"    % "7.2.25"
  )
  
  addCompilerPlugin("org.spire-math" %% "kind-projector" % "0.9.7")
  addCompilerPlugin("org.scalamacros" % "paradise" % "2.1.1" cross CrossVersion.full)

In order to keep our snippets short, we will omit the import section. Unless told otherwise, assume that all snippets have the following imports:

  import scalaz._, Scalaz._
  import simulacrum._

Up next

1. Introduction