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object Test {
// From #873:
trait X extends Function1[Int, String]
implicit def f2x(f: Function1[Int, String]): X = ???
({case _ if "".isEmpty => 0} : X) // error: expected String, found Int
// Tests where parameter list cannot be made into a pattern
def unary[T](x: T => Unit) = ???
unary((x, y) => ()) // error
unary[(Int, Int)]((x, y) => ())
unary[(Int, Int)](() => ()) // error
unary[(Int, Int)]((x, y, _) => ()) // error
unary[(Int, Int)]((x: String, y) => ()) // error
def foo(a: Tuple2[Int, Int] => String): String = ""
def foo(a: Any => String) = ()
foo((a: Int, b: String) => a + b) // error: none of the overloaded alternatives of method foo match arguments (Int, Int)
}
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