feature: pattern matching

[kanersps]

Example:

var patternMatch = fun(x) {
  return match (x) {
    case { name, "location": "Eindhoven" }: {
      return name + " lives in Eindhoven"
    }
    case { name, location }: {
      return name + " doesn't live in Eindhoven but in " + location
    }    
    case default: {
      return "I don't know where " + x.name + " lives"
    }
  }
}

patternMatch({ "name": "Kane", "location": "Uden" }) // "Kane doesn't live in Eindhoven but in Uden"
patternMatch({ "name": "Jan", "location": "Eindhoven" }) // "Jan lives in Eindhoven"
patternMatch({ "name": "Emma" }) // "I don't know where Emma lives"