OCaml: Declaring a function before defining it

Question

Is there a way to declare a function before defining it in OCaml? I'm using an OCaml interpreter.

I have two functions:

let myFunctionA = 
(* some stuff here..... *) myFunctionB (*some stuff *)

let myFunctionB = 
(* some stuff here .... *) myFunctionA (* some stuff *)

This doesn't work though, since myFunctionA can't call myFunctionB before it's made.

I've done a few google searches but can't seem to find anything. How can I accomplish this?

Answer 1

What you want is to make these two functions mutually recursive. Instead of using "let ... let ...", you have to use "let rec ... and ..." as follows:

let rec myFunctionA = 
(* some stuff here..... *) myFunctionB (*some stuff *)

and myFunctionB = 
(* some stuff here .... *) myFunctionA (* some stuff *)