diff options
Diffstat (limited to 'test/pending/pos/those-kinds-are-high.scala')
| -rw-r--r-- | test/pending/pos/those-kinds-are-high.scala | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/test/pending/pos/those-kinds-are-high.scala b/test/pending/pos/those-kinds-are-high.scala deleted file mode 100644 index 78367cb746..0000000000 --- a/test/pending/pos/those-kinds-are-high.scala +++ /dev/null @@ -1,96 +0,0 @@ -class A { - trait Container[+T] - trait Template[+CC[X] <: Container[X]] - - class C1[T] extends Template[C1] with Container[T] - class C2[T] extends Template[C2] with Container[T] - - /** Target expression: - * List(new C1[String], new C2[String]) - */ - - // Here's what would ideally be inferred. - // - // scala> :type List[Template[Container] with Container[String]](new C1[String], new C2[String]) - // List[Template[Container] with Container[java.lang.String]] - // - // Here's what it does infer. - // - // scala> :type List(new C1[String], new C2[String]) - // <console>:8: error: type mismatch; - // found : C1[String] - // required: Container[String] with Template[Container[Any] with Template[Container[Any] with Template[Any] with ScalaObject] with ScalaObject] with ScalaObject - // List(new C1[String], new C2[String]) - // ^ - // - // Simplified, the inferred type is: - // - // List[Container[String] with Template[Container[Any] with Template[Container[Any] with Template[Any]]] - // - // *** Update 2/24/2012 - // - // Hey, now there are polytypes in the inferred type. - // Not sure if that is progress or regress. - // - // test/pending/pos/those-kinds-are-high.scala:36: error: type mismatch; - // found : C1[String] - // required: ScalaObject with Container[String] with Template[ScalaObject with Container with Template[ScalaObject with Container with Template[[X]Container[X]]]] - // def fFail = List(new C1[String], new C2[String]) - // ^ - // test/pending/pos/those-kinds-are-high.scala:36: error: type mismatch; - // found : C2[String] - // required: ScalaObject with Container[String] with Template[ScalaObject with Container with Template[ScalaObject with Container with Template[[X]Container[X]]]] - // def fFail = List(new C1[String], new C2[String]) - // ^ - // two errors found - - /** Working version explicitly typed. - */ - def fExplicit = List[Template[Container] with Container[String]](new C1[String], new C2[String]) - - // nope - def fFail = List(new C1[String], new C2[String]) -} - - -trait Other { - trait GenBar[+A] - trait Bar[+A] extends GenBar[A] - trait Templ[+A, +CC[X] <: GenBar[X]] - - abstract class CC1[+A] extends Templ[A, CC1] with Bar[A] - abstract class CC2[+A] extends Templ[A, CC2] with Bar[A] - - // Compiles - class A1 { - abstract class BarFactory[CC[X] <: Bar[X]] - - def f(x: Boolean) = if (x) (null: BarFactory[CC1]) else (null: BarFactory[CC2]) - } - - // Fails - only difference is CC covariant. - class A2 { - abstract class BarFactory[+CC[X] <: Bar[X]] - - def f(x: Boolean) = if (x) (null: BarFactory[CC1]) else (null: BarFactory[CC2]) - // c.scala:23: error: kinds of the type arguments (Bar with Templ[Any,Bar]) do not conform to the expected kinds of the type parameters (type CC) in class BarFactory. - // Bar with Templ[Any,Bar]'s type parameters do not match type CC's expected parameters: - // <empty> has no type parameters, but type CC has one - // def f(x: Boolean) = if (x) (null: BarFactory[CC1]) else (null: BarFactory[CC2]) - // ^ - // one error found - } - - // Compiles - CC contravariant. - class A3 { - abstract class BarFactory[-CC[X] <: Bar[X]] // with Templ[X, CC]] - - def f(x: Boolean) = if (x) (null: BarFactory[CC1]) else (null: BarFactory[CC2]) - // c.scala:23: error: kinds of the type arguments (Bar with Templ[Any,Bar]) do not conform to the expected kinds of the type parameters (type CC) in class BarFactory. - // Bar with Templ[Any,Bar]'s type parameters do not match type CC's expected parameters: - // <empty> has no type parameters, but type CC has one - // def f(x: Boolean) = if (x) (null: BarFactory[CC1]) else (null: BarFactory[CC2]) - // ^ - // one error found - } -} |