Scala type inference failure on “? extends” in Java code?

The inference works against Scala 2.8.0. Beta1 For earlier versions, it works if you change: public Query refine(Class clazz) to: public Query refine(Class clazz) scalac -print suggests that the interpretation of the Java signatures hasn't changed across Scala releases. So the difference is probably in the typer/inferencer itself Scala 2.7.5 Original def refineS >: _root_.scala.

Nothing : Nothing : _root_.scala. Nothing : scala. Nothing : Nothing : scala.Nothing.

The inference works against Scala 2.8.0. Beta1. For earlier versions, it works if you change: public Query refine(Class clazz) to: public Query refine(Class clazz) scalac -print suggests that the interpretation of the Java signatures hasn't changed across Scala releases.So the difference is probably in the typer/inferencer itself.

Scala 2.7.5 Original def refineS >: _root_.scala. Nothing : Nothing : _root_.scala. Nothing : scala.

Nothing : Nothing : scala. Nothing.

Yes - I realize that the change works, but it is unnecessarily restrictive in my opinion. For example, I should be able to say refineCollection(classOfLinkedList) or something like that – oxbow_lakes Mar 22 '10 at 12:40.

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