1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
object Match
{
def main(args: Array[String]) = {
args(0) match {
case Extractor1(Extractor2(Extractor3("dog", "dog", "dog"), x2, x3), b, c, Extractor3("b", "b", f), e) => println(e)
case Extractor3(Extractor2(Extractor1("a", "aa", "aaa", "aa", "a"), Extractor2("a", "aa", "aaa"), e), y, z) => println(e)
case Extractor2(Extractor3("a", "a", x), Extractor3("b", "b", y), Extractor3("c", "c", z)) => println(z)
case _ => println("fail")
}
}
object Extractor1 {
def unapply(x: Any) = x match {
case x: String => Some(x, x+x, x+x+x, x+x, x)
case _ => None
}
}
object Extractor2 {
def unapply(x: Any) = x match {
case x: String => Some(x, x+x, x+x+x)
case _ => None
}
}
object Extractor3 {
def unapply(x: Any) = x match {
case x: String => Some(x, x, x)
case _ => None
}
}
}
|
