example printing Scala2

Author: lemastero

scala2/build.sbt

@@ -0,0 +1,48 @@
+name := "exampleScala2"
+
+version := "0.0.1"
+
+lazy val scala212 = "2.12.18"
+lazy val scala213 = "2.13.12"
+
+scalaVersion := scala213
+
+crossScalaVersions := List(scala212, scala213)
+
+resolvers += Resolver.sonatypeRepo("snapshots")
+
+lazy val catsVersion = "2.10.0"
+lazy val catsMtlVersion = "1.3.1"
+lazy val scalaTestPlusVersion = "3.1.0.0-RC2"
+lazy val scalacheckVersion = "1.17.0"
+libraryDependencies ++= Seq(
+  // cats
+  "org.typelevel" %% "cats-core" % catsVersion,
+  "org.typelevel" %% "cats-effect" % "2.5.4",
+
+  "io.monix" %% "monix" % "3.4.1",
+
+  // Scalaz
+  "org.scalaz"    %% "scalaz-core" % "7.3.7",
+
+  // ZIO
+  "dev.zio" %% "zio" % "2.0.18",
+  "dev.zio" %% "zio-prelude"  % "1.0.0-RC8",
+
+  // algebra
+  "org.typelevel" %% "algebra" % "2.10.0",
+ 
+  // test
+  "org.scalacheck" %% "scalacheck" % scalacheckVersion % Test,
+  "org.scalatestplus" %% "scalatestplus-scalacheck" % scalaTestPlusVersion % Test,
+  "com.github.alexarchambault" %% "scalacheck-shapeless_1.15" % "1.3.0" % Test,
+  "org.scalatest" %% "scalatest" % "3.2.17" % Test,
+)
+
+scalacOptions ++= Seq(
+  "-encoding", "UTF-8"
+)
+
+addCompilerPlugin("org.typelevel" %% "kind-projector" % "0.13.2" cross CrossVersion.full)
+
+classLoaderLayeringStrategy := ClassLoaderLayeringStrategy.Flat

scala2/src/main/scala/examples/adts.scala

@@ -0,0 +1,17 @@
+object adts {
+
+sealed trait Rgb
+case object Red extends Rgb
+case object Green extends Rgb
+case object Blue extends Rgb
+
+sealed trait Bool
+case object True extends Bool
+case object False extends Bool
+
+final case class RgbPair(snd: Bool, fst: Rgb)
+
+def idRgb(theArg: Rgb): Rgb = theArg
+
+def and0(rgbArg: Rgb, rgbPairArg: RgbPair): RgbPair = rgbPairArg
+}