Merge pull request #702 from ashawley/compat-1.15

Fix source compatibility 1.15.0

Author: ashawley

build.sbt

@@ -111,6 +111,7 @@ lazy val sharedSettings = MimaSettings.settings ++ scalaVersionSettings ++ Seq(
   // don't use fatal warnings in tests
   Test / scalacOptions ~= (_ filterNot (_ == "-Xfatal-warnings")),
 
+  mimaReportSignatureProblems := true,
   mimaPreviousArtifacts := {
     // TODO: re-enable MiMa for 2.14 once there is a final version
     if (scalaMajorVersion.value == 14 || isDotty.value) Set()

project/MimaSettings.scala

@@ -25,8 +25,6 @@ object MimaSettings {
   )
 
   private def otherProblems = Seq(
-    // New issue added in MiMa 0.4.0
-    exclude[IncompatibleSignatureProblem]("org.scalacheck.*"),
   )
 
 }

src/main/scala/org/scalacheck/Gen.scala

@@ -896,21 +896,21 @@ object Gen extends GenArities with GenVersionSpecific {
   }
 
   /** A generator that picks a random number of elements from a list */
-  def someOf[T](l: Iterable[T]): Gen[collection.Seq[T]] =
+  def someOf[T](l: Iterable[T]) =
     choose(0, l.size).flatMap(pick(_,l))
 
   /** A generator that picks a random number of elements from a list */
-  def someOf[T](g1: Gen[T], g2: Gen[T], gs: Gen[T]*): Gen[collection.Seq[T]] =
+  def someOf[T](g1: Gen[T], g2: Gen[T], gs: Gen[T]*) =
     choose(0, gs.length+2).flatMap(pick(_, g1, g2, gs: _*))
 
   /** A generator that picks at least one element from a list */
-  def atLeastOne[T](l: Iterable[T]): Gen[collection.Seq[T]] = {
+  def atLeastOne[T](l: Iterable[T]) = {
     require(l.size > 0, "There has to be at least one option to choose from")
     choose(1,l.size).flatMap(pick(_,l))
   }
 
   /** A generator that picks at least one element from a list */
-  def atLeastOne[T](g1: Gen[T], g2: Gen[T], gs: Gen[T]*): Gen[collection.Seq[T]] =
+  def atLeastOne[T](g1: Gen[T], g2: Gen[T], gs: Gen[T]*) =
     choose(1, gs.length+2).flatMap(pick(_, g1, g2, gs: _*))
 
   /** A generator that randomly picks a given number of elements from a list