pipe.swift

///
public func pipe<A,B,R>(a:(A)->B, b:(B)->R) -> (A)->R {
  return {(x) in b(a(x))}
}

///
public func pipe<A,B,C,R>(a:(A)->B, b:(B)->C, c:(C)->R) -> (A)->R {
  return {(x) in c(b(a(x)))}
}

///
public func pipe<A,B,C,D,R>(a:(A)->B, b:(B)->C, c:(C)->D, d:(D)->R) -> (A)->R {
  return {(x) in d(c(b(a(x))))}
}

///
public func pipe<A,B,C,D,E,R>(a:(A)->B, b:(B)->C, c:(C)->D, d:(D)->E, e:(E)->R) -> (A)->R {
  return {(x) in e(d(c(b(a(x)))))}
}

///
public func pipe<A,B,C,D,E,F,R>(a:(A)->B, b:(B)->C, c:(C)->D, d:(D)->E, e:(E)->F, f:(F)->R) -> (A)->R {
  return {(x) in f(e(d(c(b(a(x))))))}
}

///
public func pipe<A,B,C,D,E,F,G,R>(a:(A)->B, b:(B)->C, c:(C)->D, d:(D)->E, e:(E)->F, f:(F)->G, g:(G)->R) -> (A)->R {
  return {(x) in g(f(e(d(c(b(a(x)))))))}
}