diff options
| -rw-r--r-- | compiler/src/dotty/tools/dotc/transform/patmat/Space.scala | 4 | ||||
| -rw-r--r-- | tests/patmat/i2254.scala | 6 |
2 files changed, 8 insertions, 2 deletions
diff --git a/compiler/src/dotty/tools/dotc/transform/patmat/Space.scala b/compiler/src/dotty/tools/dotc/transform/patmat/Space.scala index baf1ae356..229545a57 100644 --- a/compiler/src/dotty/tools/dotc/transform/patmat/Space.scala +++ b/compiler/src/dotty/tools/dotc/transform/patmat/Space.scala @@ -324,7 +324,7 @@ class SpaceEngine(implicit ctx: Context) extends SpaceLogic { debug.println(s"candidates for ${tp.show} : [${children.map(_.show).mkString(", ")}]") - tp match { + tp.dealias match { case OrType(tp1, tp2) => List(Typ(tp1, true), Typ(tp2, true)) case _ if tp =:= ctx.definitions.BooleanType => List( @@ -379,7 +379,7 @@ class SpaceEngine(implicit ctx: Context) extends SpaceLogic { def canDecompose(tp: Type): Boolean = { val res = tp.classSymbol.is(allOf(Abstract, Sealed)) || tp.classSymbol.is(allOf(Trait, Sealed)) || - tp.isInstanceOf[OrType] || + tp.dealias.isInstanceOf[OrType] || tp =:= ctx.definitions.BooleanType || tp.classSymbol.is(allOf(Enum, Sealed)) // Enum value doesn't have Sealed flag diff --git a/tests/patmat/i2254.scala b/tests/patmat/i2254.scala new file mode 100644 index 000000000..23dd8ad70 --- /dev/null +++ b/tests/patmat/i2254.scala @@ -0,0 +1,6 @@ +object Test { + type OrAlias = Int | Float + + def m(s: OrAlias | String) = s match { + case _: Int => ; case _: Float => ; case _: String => ; } +}
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