diff options
Diffstat (limited to 'test/files/neg/t6675b.scala')
-rw-r--r-- | test/files/neg/t6675b.scala | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/test/files/neg/t6675b.scala b/test/files/neg/t6675b.scala new file mode 100644 index 0000000000..c86c9c3955 --- /dev/null +++ b/test/files/neg/t6675b.scala @@ -0,0 +1,40 @@ +object LeftOrRight { + def unapply[A](value: Either[A, A]): Option[A] = value match { + case scala.Left(x) => Some(x) + case scala.Right(x) => Some(x) + } +} + +object NativelyTwo { + def unapply[A](value: Either[A, A]): Option[(A, A)] = value match { + case scala.Left(x) => Some(x -> x) + case scala.Right(x) => Some(x -> x) + } +} + + +class A { + def f1 = (Left((0, 0)): Either[(Int, Int), (Int, Int)]) match { case LeftOrRight(a) => a } // warn + def f2 = (Left((0, 0)): Either[(Int, Int), (Int, Int)]) match { case LeftOrRight((a, b)) => a } // no warn + def f3 = (Left((0, 0)): Either[(Int, Int), (Int, Int)]) match { case LeftOrRight((a, b, c)) => a } // fail +} + +class B { + def f1[A](x: A) = (Left(x): Either[A, A]) match { case LeftOrRight(a) => a } // no warn + def f2[A](x: A) = (Left(x -> x): Either[(A, A), (A, A)]) match { case LeftOrRight(a) => a } // warn + def f3[A](x: A) = (Left(x -> x): Either[(A, A), (A, A)]) match { case LeftOrRight((a, b)) => a } // no warn + def f4[A](x: A) = (Left(x -> x): Either[(A, A), (A, A)]) match { case LeftOrRight((a, b, c)) => a } // fail +} + +class C { + def f1 = (Left((0, 0)): Either[(Int, Int), (Int, Int)]) match { case NativelyTwo(a) => a } // warn + def f2 = (Left((0, 0)): Either[(Int, Int), (Int, Int)]) match { case NativelyTwo((a, b)) => a } // no warn + def f3 = (Left((0, 0)): Either[(Int, Int), (Int, Int)]) match { case NativelyTwo((a, b, c)) => a } // fail +} + +class D { + def f1[A](x: A) = (Left(x): Either[A, A]) match { case NativelyTwo(a) => a } // warn + def f2[A](x: A) = (Left(x -> x): Either[(A, A), (A, A)]) match { case NativelyTwo(a) => a } // warn + def f3[A](x: A) = (Left(x -> x): Either[(A, A), (A, A)]) match { case NativelyTwo((a, b)) => a } // no warn + def f4[A](x: A) = (Left(x -> x): Either[(A, A), (A, A)]) match { case NativelyTwo((a, b, c)) => a } // fail +} |