diff options
Diffstat (limited to 'test/files/run/inferred-type-constructors-hou.scala')
-rw-r--r-- | test/files/run/inferred-type-constructors-hou.scala | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/test/files/run/inferred-type-constructors-hou.scala b/test/files/run/inferred-type-constructors-hou.scala new file mode 100644 index 0000000000..79a8653f68 --- /dev/null +++ b/test/files/run/inferred-type-constructors-hou.scala @@ -0,0 +1,125 @@ +package p { + trait TCon[+CC[X]] { + def fPublic: CC[Int] = ??? + private[p] def fPackagePrivate: CC[Int] = ??? + protected[p] def fPackageProtected: CC[Int] = ??? + } + trait Iterable[+A] extends TCon[Iterable] + trait Set[A] extends Iterable[A] with TCon[Set] + trait Seq[+A] extends Iterable[A] with TCon[Seq] + + private[p] abstract class AIterable[+A] extends Iterable[A] + private[p] abstract class ASeq[+A] extends AIterable[A] with Seq[A] + private[p] abstract class ASet[A] extends AIterable[A] with Set[A] + + package m { + private[m] abstract class ASeq[A] extends p.ASeq[A] with Seq[A] + private[m] abstract class ASet[A] extends p.ASet[A] with Set[A] + trait Set[A] extends p.Set[A] with TCon[Set] + trait Seq[A] extends p.Seq[A] with TCon[Seq] + trait BitSet extends ASet[Int] + trait IntSeq extends ASeq[Int] + } + + package i { + private[i] abstract class ASeq[+A] extends p.ASeq[A] with Seq[A] + private[i] abstract class ASet[A] extends p.ASet[A] with Set[A] + trait Set[A] extends p.Set[A] with TCon[Set] + trait Seq[+A] extends p.Seq[A] with TCon[Seq] + trait BitSet extends ASet[Int] + trait IntSeq extends ASeq[Int] + } +} + +object Test { + import scala.reflect.runtime.universe._ + // Complicated by the absence of usable type constructor type tags. + def extract[A, CC[X]](xs: CC[A]): CC[A] = xs + def whatis[T: TypeTag](x: T): Unit = { + val tpe = typeOf[T] + val access = tpe.typeSymbol.asInstanceOf[scala.reflect.internal.HasFlags].accessString.replaceAllLiterally("package ", "") + println(f"$access%15s $tpe") + } + + trait IntIterable extends p.Iterable[Int] + trait IntSet extends p.Set[Int] + trait IntSeq extends p.Seq[Int] + + trait MutableIntSet extends p.m.Set[Int] + trait MutableIntSeq extends p.m.Seq[Int] + + trait ImmutableIntSet extends p.i.Set[Int] + trait ImmutableIntSeq extends p.i.Seq[Int] + + def f1: IntIterable = null + def f2: IntSet = null + def f3: IntSeq = null + + def g1: MutableIntSet = null + def g2: MutableIntSeq = null + def g3: p.m.BitSet = null + + def h1: ImmutableIntSeq = null + def h2: p.i.BitSet = null + def h3: p.i.IntSeq = null + + def main(args: Array[String]): Unit = { + whatis(extract(f1)) + whatis(extract(f2)) + whatis(extract(f3)) + whatis(extract(g1)) + whatis(extract(g2)) + whatis(extract(g3)) + whatis(extract(h1)) + whatis(extract(h2)) + whatis(extract(h3)) + + whatis(extract(if (true) f1 else f2)) + whatis(extract(if (true) f1 else f3)) + whatis(extract(if (true) f1 else g1)) + whatis(extract(if (true) f1 else g2)) + whatis(extract(if (true) f1 else g3)) + whatis(extract(if (true) f1 else h1)) + whatis(extract(if (true) f1 else h2)) + whatis(extract(if (true) f1 else h3)) + whatis(extract(if (true) f2 else f3)) + whatis(extract(if (true) f2 else g1)) + whatis(extract(if (true) f2 else g2)) + whatis(extract(if (true) f2 else g3)) + whatis(extract(if (true) f2 else h1)) + whatis(extract(if (true) f2 else h2)) + whatis(extract(if (true) f2 else h3)) + whatis(extract(if (true) f3 else g1)) + whatis(extract(if (true) f3 else g2)) + whatis(extract(if (true) f3 else g3)) + whatis(extract(if (true) f3 else h1)) + whatis(extract(if (true) f3 else h2)) + whatis(extract(if (true) f3 else h3)) + whatis(extract(if (true) g1 else g2)) + whatis(extract(if (true) g1 else g3)) + whatis(extract(if (true) g1 else h1)) + whatis(extract(if (true) g1 else h2)) + whatis(extract(if (true) g1 else h3)) + whatis(extract(if (true) g2 else g3)) + whatis(extract(if (true) g2 else h1)) + whatis(extract(if (true) g2 else h2)) + whatis(extract(if (true) g2 else h3)) + whatis(extract(if (true) g3 else h1)) + whatis(extract(if (true) g3 else h2)) + whatis(extract(if (true) g3 else h3)) + whatis(extract(if (true) h1 else h2)) + whatis(extract(if (true) h1 else h3)) + whatis(extract(if (true) h2 else h3)) + + whatis(extract(Nil)) + whatis(extract(Vector())) + whatis(extract(Map[Int,Int]())) + whatis(extract(Set[Int]())) + whatis(extract(Seq[Int]())) + whatis(extract(Array[Int]())) + whatis(extract(scala.collection.immutable.BitSet(1))) + whatis(extract("abc")) + whatis(extract(if (true) Stream(1) else List(1))) + whatis(extract(if (true) Seq(1) else Set(1))) + } +} |