curry.nim

proc curry[A, Ret] (
    func: proc(someA: A): Ret, 
    valueA: A): proc: Ret =
  return proc: Ret = func(valueA)
proc curry[A,B, Ret] (
    func: proc(someA: A, someB: B): Ret, 
    valueA: A): proc(someB: B): Ret =
  return proc(someB: B): Ret = func(valueA, someB)
proc curry[A,B,C, Ret] (
    func: proc(someA: A, someB: B, someC: C): Ret,
    valueA: A): proc(someB: B, someC: C): Ret =
  return proc(someB: B, someC: C): Ret = func(valueA, someB, someC)
proc curry[A,B,C,D, Ret] (
    func: proc(someA:A, someB:B, someC:C, someD:D): Ret,
    valueA: A): proc(someB:B,someC:C,someD:D): Ret =
  return proc(someB:B,someC:C,someD:D): Ret = func(valueA, someB,someC,someD)


proc foo(a, b: int): int =
  return a * b

proc foo2(a: int, b: float, c: float): float =
  return a.float * b / c

let f = foo.curry(42)
echo f(2)

let f2 = foo2.curry(10).curry(10.0)
echo f2(1.0).int


proc squaz(some: int) = echo(some)
curry[int,void](squaz, 9001)()
curry(squaz, 9001)()

# ^ wont work without

proc curry[A] (func: proc(someA: A), valueA: A): proc() =
  return proc = func(valueA)