From 15e8d83a377398c9c13a5319a23645d10b14579a Mon Sep 17 00:00:00 2001 From: liu fengyun Date: Thu, 13 Apr 2017 14:23:47 +0200 Subject: fix #2254: dealias types in decomposition of spaces --- compiler/src/dotty/tools/dotc/transform/patmat/Space.scala | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'compiler/src/dotty/tools/dotc/transform/patmat/Space.scala') 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 -- cgit v1.2.3