diff options
Diffstat (limited to 'test/files/pos')
-rw-r--r-- | test/files/pos/t6205.scala | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/files/pos/t6205.scala b/test/files/pos/t6205.scala new file mode 100644 index 0000000000..02d924fe85 --- /dev/null +++ b/test/files/pos/t6205.scala @@ -0,0 +1,18 @@ +// original code by reporter +class A[T] +class Test1 { + def x(backing: Map[A[_], Any]) = + for( (k: A[kt], v) <- backing) + yield (k: A[kt]) +} + +// this tests same thing as above, but independent of library classes, +// earlier expansions eliminated as well as variance (everything's invariant) +case class Holder[A](a: A) +class Mapped[A] { def map[T](f: Holder[A] => T): Iterable[T] = ??? } +class Test2 { + def works(backing: Mapped[A[_]]): Iterable[A[_]] + = backing.map(x => + x match {case Holder(k: A[kt]) => (k: A[kt])} + ) +}
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