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object Bar{
def unapply(x : String) = x == "bar";
}
object Even{
def unapply(x : Int) = if (x % 2 == 0) Some(x / 2) else None;
}
object Test extends App{
val LongWord = "supercalifragilisticexpialidocious";
def foo(x : Int, y : String) : Int = (x, y) match {
case (Even(i), "bar") => 1
case (1 | 2 | 3, "foo") => 42;
case (x, y) if y.length < x => 11;
case (1 | 2 | 3, Bar()) => 7;
case (1 | 2 | 3, "bar") => 8
case (Even(Even(3)), Bar()) => 13;
case (Even(Even(3)), LongWord) => 13;
case _ => 0;
}
List(
2 -> "bar",
2 -> "foo",
3 -> "foo",
7 -> "flob",
3 -> "bar",
12 -> LongWord
).foreach({case (x, y) => println(foo(x, y))});
}
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