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Diffstat (limited to 'tests/untried/pos/gadts2.scala')
-rw-r--r-- | tests/untried/pos/gadts2.scala | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tests/untried/pos/gadts2.scala b/tests/untried/pos/gadts2.scala new file mode 100644 index 000000000..b67bafb32 --- /dev/null +++ b/tests/untried/pos/gadts2.scala @@ -0,0 +1,25 @@ +object Test { + + abstract class Number + case class MyInt(n: Int) extends Number + case class MyDouble(d: Double) extends Number + + trait Term[a] + case class Cell[a](var x: a) extends Term[a] + final case class NumTerm(val n: Number) extends Term[Number] + + def f[a](t: Term[a], c: Cell[a]): Unit = { + t match { + case NumTerm(n) => c.x = MyDouble(1.0) + } + } + + val x: Term[Number] = NumTerm(MyInt(5)) + + def main(args: Array[String]): Unit = { + val cell = Cell[Number](MyInt(6)) + Console.println(cell) + f[Number](new NumTerm(MyInt(5)), cell) + Console.println(cell) + } +} |