[sambeau]

I’m sorry, but this is just awful.

  func TraverseTuple10[F1 ~func(A1) IOEither[E, T1], F2 ~func(A2) IOEither[E, T2], F3 ~func(A3) IOEither[E, T3], F4 ~func(A4) IOEither[E, T4], F5 ~func(A5) IOEither[E, T5], F6 ~func(A6) IOEither[E, T6], F7 ~func(A7) IOEither[E, T7], F8 ~func(A8) IOEither[E, T8], F9 ~func(A9) IOEither[E, T9], F10 ~func(A10) IOEither[E, T10], E, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10 any](f1 F1, f2 F2, f3 F3, f4 F4, f5 F5, f6 F6, f7 F7, f8 F8, f9 F9, f10 F10) func(T.Tuple10[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10]) IOEither[E, T.Tuple10[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]]

[jpk]

Big Scala vibes here, see also [1].

1: https://github.com/scala/scala/blob/v2.13.11/src/library/sca...

[eweise]

That looks pretty straightforward actually.

[jpk]

Ultimately it is, but I guess my point is that having goofy signatures like these down in the bowels of a library (like FP-Go, or Scala's stdlib) might just be necessary goofiness because FP is FP. (Not to knock FP. Engineering is about tradeoffs.)

[eweise]

From the Go standard library

"func CompareFunc[S1 ~[]E1, S2 ~[]E2, E1, E2 any](s1 S1, s2 S2, cmp func(E1, E2) int) int { "

Looks like Scala

[alex_lav]

Just your average Scala function signature.

Also yes it is awful.

[bufio]

IBM as fuck.

[kjs3]

It's probably valid JCL. :-)