diff options
Diffstat (limited to 'test/files/pos/bug0013.scala')
-rw-r--r-- | test/files/pos/bug0013.scala | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/files/pos/bug0013.scala b/test/files/pos/bug0013.scala new file mode 100644 index 0000000000..999a2ab61c --- /dev/null +++ b/test/files/pos/bug0013.scala @@ -0,0 +1,31 @@ +// covariant linked list +abstract class M { self => + + type T + final type selfType = M {type T <: self.T} + type actualSelfType >: self.type <: selfType + + def next: selfType + + // I don't understand why this doesn't compile, but that's a separate matter + // error: method all2 cannot be accessed in M.this.selfType + // because its instance type => Stream[M{type T <: M.this.selfType#T}] + // contains a malformed type: M.this.selfType#T + // def all2: Stream[M {type T <: self.T}] = Stream.cons(self: actualSelfType, next.all2) + + + // compiles successfully + // def all3: Stream[M {type T <: self.T}] = all3Impl(self: actualSelfType) + // private def all3Impl(first: M {type T <: self.T}): Stream[M {type T <: self.T}] = Stream.cons(first, all3Impl(first.next)) + + + + def all4: Stream[M {type T <: self.T}] = Unrelated.all4Impl[T](self: actualSelfType) +} + +object Unrelated { + def all4Impl[U](first: M {type T <: U}): Stream[M {type T <: U}] = Stream.cons(first, all4Impl(first.next)) + + // compiles successfully + // def all4Impl[U](first: M {type T <: U}): Stream[M {type T <: U}] = Stream.cons(first, all4Impl[U](first.next)) +}
\ No newline at end of file |