scala> def toInt: Any => Int = ???
def toInt: Any => Int
scala> def hoFun: (Int => Int) => Int = ???
def hoFun: (Int => Int) => Int
scala> def curriedFun: Int => (Int => Int) = ???
def curriedFun: Int => Int => Int
scala> def tupFun: ((Int, Int)) => Int = ???
def tupFun: ((Int, Int)) => Int
scala> def binFun: (Int, Int) => Int = ???
def binFun: (Int, Int) => Int
