Use typelevel scala

Author: Igor Antonov

build.sbt

@@ -12,7 +12,9 @@ lazy val commonSettings = Seq(
 
  version := "5.0.0-SNAPSHOT",
 
- scalaVersion := "2.11.11",
+ scalaOrganization := "org.typelevel",
+ scalaVersion := "2.11.11-bin-typelevel-4",
+
  scalacOptions ++= Seq(
  "-deprecation",
  "-encoding", "UTF-8", // yes, this is 2 args
@@ -23,9 +25,27 @@ lazy val commonSettings = Seq(
  "-unchecked",
  "-Xlint",
  "-Yno-adapted-args",
- "-Ywarn-numeric-widen",
- "-Ywarn-value-discard",
- "-Xfuture"
+ "-Ywarn-dead-code", // Warn when dead code is identified.
+ "-Ywarn-extra-implicit", // Warn when more than one implicit parameter section is defined.
+ "-Ywarn-inaccessible", // Warn about inaccessible types in method signatures.
+ "-Ywarn-infer-any", // Warn when a type argument is inferred to be `Any`.
+ "-Ywarn-nullary-override", // Warn when non-nullary `def f()' overrides nullary `def f'.
+ "-Ywarn-nullary-unit", // Warn when nullary methods return Unit.
+ "-Ywarn-numeric-widen", // Warn when numerics are widened.
+ "-Ywarn-unused:implicits", // Warn if an implicit parameter is unused.
+ "-Ywarn-unused:imports", // Warn if an import selector is not referenced.
+ "-Ywarn-unused:locals", // Warn if a local definition is unused.
+ "-Ywarn-unused:params", // Warn if a value parameter is unused.
+ "-Ywarn-unused:patvars", // Warn if a variable bound in a pattern is unused.
+ "-Ywarn-unused:privates", // Warn if a private member is unused.
+ "-Ywarn-value-discard", // Warn when non-Unit expression results are unused.
+ "-Xfuture",
+ // Typelevel Scala 4
+ "-Yinduction-heuristics", // speeds up the compilation of inductive implicit resolution
+ "-Ykind-polymorphism", // type and method definitions with type parameters of arbitrary kinds
+ "-Yliteral-types", // literals can appear in type position
+ "-Xstrict-patmat-analysis", // more accurate reporting of failures of match exhaustivity
+ "-Xlint:strict-unsealed-patmat" // warn on inexhaustive matches against unsealed traits
  ),
 
  addCompilerPlugin("org.spire-math" % "kind-projector" % "0.9.4" cross CrossVersion.binary),
@@ -63,7 +83,7 @@ lazy val `client-api` = (project in file("client-api")).
  name := s"client-api",
  description := s"Redmine REST API Client for Scala ${scalaBinaryVersion.value}: Client API. " +
  s"Contains domain classes and API manager traits.",
- crossScalaVersions := Seq("2.11.11", "2.12.3"),
+ crossScalaVersions := Seq("2.11.11-bin-typelevel-4", "2.12.3-bin-typelevel-4"),
  libraryDependencies ++= Seq(
  Dependencies.monixEval,
  Dependencies.catsFree,
@@ -83,7 +103,7 @@ lazy val `client-core` = (project in file("client-core")).
  name := s"client-core",
  description := s"Redmine REST API Client for Scala ${scalaBinaryVersion.value}: Client Core. " +
  s"Contains API manager and JSON serialization implementation.",
- crossScalaVersions := Seq("2.11.11", "2.12.3"),
+ crossScalaVersions := Seq("2.11.11-bin-typelevel-4", "2.12.3-bin-typelevel-4"),
  libraryDependencies ++= Seq(
  Dependencies.catsFree,
  Dependencies.jodaTime,
@@ -104,7 +124,7 @@ lazy val `client-play25-ws` = (project in file("client-play25-ws")).
  settings(
  name := s"client-play25-ws",
  description := s"Redmine REST API Client for Scala ${scalaBinaryVersion.value}: Play-WS 2.5 Web Client",
- crossScalaVersions := Seq("2.11.11"),
+ crossScalaVersions := Seq("2.11.11-bin-typelevel-4"),
  libraryDependencies ++= Seq(
  Dependencies.play25Ws,
  Dependencies.slf4jJdk14 % Test,
@@ -120,7 +140,7 @@ lazy val `client-play26-ws` = (project in file("client-play26-ws")).
  settings(
  name := s"client-play26-ws",
  description := s"Redmine REST API Client for Scala ${scalaBinaryVersion.value}: Play-WS 2.6 Web Client",
- crossScalaVersions := Seq("2.11.11","2.12.3"),
+ crossScalaVersions := Seq("2.11.11-bin-typelevel-4","2.12.3-bin-typelevel-4"),
  libraryDependencies ++= Seq(
  Dependencies.play26Ws,
  Dependencies.slf4jJdk14 % Test,
@@ -136,7 +156,7 @@ lazy val `client-play-ws-standalone` = (project in file("client-play-ws-standalo
  settings(
  name := s"client-play-ws-standalone",
  description := s"Redmine REST API Client for Scala ${scalaBinaryVersion.value}: Play-WS Standalone Web Client",
- crossScalaVersions := Seq("2.11.11", "2.12.3"),
+ crossScalaVersions := Seq("2.11.11-bin-typelevel-4", "2.12.3-bin-typelevel-4"),
  libraryDependencies ++= Seq(
  Dependencies.playWsStandalone,
  Dependencies.slf4jJdk14 % Test,