diff options
Diffstat (limited to 'test/files/neg/unchecked-abstract.scala')
-rw-r--r-- | test/files/neg/unchecked-abstract.scala | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/test/files/neg/unchecked-abstract.scala b/test/files/neg/unchecked-abstract.scala new file mode 100644 index 0000000000..5b915755f4 --- /dev/null +++ b/test/files/neg/unchecked-abstract.scala @@ -0,0 +1,93 @@ +trait Con[-X] +trait Inv[X] +trait Cov[+X] + +abstract class M { + type H + type L <: H + type T >: L <: H + + def h1(x: Con[H]) = { + /* nowarn */ println(x.isInstanceOf[Con[H]]) + /* nowarn */ println(x.isInstanceOf[Con[T]]) + /* nowarn */ println(x.isInstanceOf[Con[L]]) + } + def h2(x: Con[T]) = { + /* warn */ println(x.isInstanceOf[Con[H]]) + /* nowarn */ println(x.isInstanceOf[Con[T]]) + /* nowarn */ println(x.isInstanceOf[Con[L]]) + } + def h3(x: Con[L]) = { + /* warn */ println(x.isInstanceOf[Con[H]]) + /* warn */ println(x.isInstanceOf[Con[T]]) + /* nowarn */ println(x.isInstanceOf[Con[L]]) + } + def h4(x: Inv[H]) = { + /* nowarn */ println(x.isInstanceOf[Inv[H]]) + /* warn */ println(x.isInstanceOf[Inv[T]]) + /* warn */ println(x.isInstanceOf[Inv[L]]) + } + def h5(x: Inv[T]) = { + /* warn */ println(x.isInstanceOf[Inv[H]]) + /* nowarn */ println(x.isInstanceOf[Inv[T]]) + /* warn */ println(x.isInstanceOf[Inv[L]]) + } + def h6(x: Inv[L]) = { + /* warn */ println(x.isInstanceOf[Inv[H]]) + /* warn */ println(x.isInstanceOf[Inv[T]]) + /* nowarn */ println(x.isInstanceOf[Inv[L]]) + } + def h7(x: Cov[H]) = { + /* nowarn */ println(x.isInstanceOf[Cov[H]]) + /* warn */ println(x.isInstanceOf[Cov[T]]) + /* warn */ println(x.isInstanceOf[Cov[L]]) + } + def h8(x: Cov[T]) = { + /* nowarn */ println(x.isInstanceOf[Cov[H]]) + /* nowarn */ println(x.isInstanceOf[Cov[T]]) + /* warn */ println(x.isInstanceOf[Cov[L]]) + } + def h9(x: Cov[L]) = { + /* nowarn */ println(x.isInstanceOf[Cov[H]]) + /* nowarn */ println(x.isInstanceOf[Cov[T]]) + /* nowarn */ println(x.isInstanceOf[Cov[L]]) + } +} + +object Test extends M { + type H = Any + type T = Int + type L = Nothing + + val conh = new Con[H] { } + val cont = new Con[T] { } + val conl = new Con[L] { } + + val invh = new Inv[H] { } + val invt = new Inv[T] { } + val invl = new Inv[L] { } + + val covh = new Cov[H] { } + val covt = new Cov[T] { } + val covl = new Cov[L] { } + + def main(args: Array[String]): Unit = { + h1(conh) + h2(conh) + h2(cont) + h3(conh) + h3(cont) + h3(conl) + + h4(invh) + h5(invt) + h6(invl) + + h7(covh) + h7(covt) + h7(covl) + h8(covt) + h8(covl) + h9(covl) + } +} |