What we'd like the source to look like: ```data cl...

# pattern-matching

[mattmoore]

What we'd like the source to look like:

data class Person(val firstName: String, val lastName: String)
val person = Person("Matt", "Moore")

fun case(arg: Any): Any = arg

val result = when (person) {
  case(Person(_, "Moore")) -> "Matched"
  else -> "Not matched"
}