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// An extractor with 2 results
object Foo { def unapply(x : String) = Some(Pair(x, x)) }
object Test extends App {
// Prints 'x'; ought not to compile (or maybe a should be the Pair?).
"x" match { case Foo(a) => Console.println(a) }
// Prints '(x,x)' as expected.
"x" match { case Foo(a, b) => Console.println((a,b)) }
// Gives confusing error 'not found: value c'.
"x" match { case Foo(a, b, c) => Console.println((a,b,c)) }
}
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