diff options
Diffstat (limited to 'test/files/neg')
-rw-r--r-- | test/files/neg/tailrec-2.check | 4 | ||||
-rw-r--r-- | test/files/neg/tailrec-2.scala | 26 |
2 files changed, 30 insertions, 0 deletions
diff --git a/test/files/neg/tailrec-2.check b/test/files/neg/tailrec-2.check new file mode 100644 index 0000000000..ab6733946d --- /dev/null +++ b/test/files/neg/tailrec-2.check @@ -0,0 +1,4 @@ +tailrec-2.scala:6: error: could not optimize @tailrec annotated method: it contains a recursive call targetting a supertype + @annotation.tailrec final def f[B >: A](mem: List[B]): List[B] = (null: Super[A]).f(mem) + ^ +one error found diff --git a/test/files/neg/tailrec-2.scala b/test/files/neg/tailrec-2.scala new file mode 100644 index 0000000000..4388815a06 --- /dev/null +++ b/test/files/neg/tailrec-2.scala @@ -0,0 +1,26 @@ +sealed abstract class Super[+A] { + def f[B >: A](mem: List[B]) : List[B] +} +// This one should fail, target is a supertype +class Bop1[+A](val element: A) extends Super[A] { + @annotation.tailrec final def f[B >: A](mem: List[B]): List[B] = (null: Super[A]).f(mem) +} +// These succeed +class Bop2[+A](val element: A) extends Super[A] { + @annotation.tailrec final def f[B >: A](mem: List[B]): List[B] = (null: Bop2[A]).f(mem) +} +object Bop3 extends Super[Nothing] { + @annotation.tailrec final def f[B](mem: List[B]): List[B] = (null: Bop3.type).f(mem) +} +class Bop4[+A](val element: A) extends Super[A] { + @annotation.tailrec final def f[B >: A](mem: List[B]): List[B] = Other.f[A].f(mem) +} + +object Other { + def f[T] : Bop4[T] = error("") +} + +object Bop { + def m1[A] : Super[A] = error("") + def m2[A] : Bop2[A] = error("") +}
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