f# - How to have two methods calling each other?

Question

I'm a bit confused as to how to get two method to call each other (i.e., have A() call B() and B() call A()). It seems that F# only 'sees' the method after it's been encountered in code, so if it hasn't, it just says value or constructor has not been defined.

Am I missing something very basic here?

Answer 1

'let rec... and...' is the syntax you seek.

let rec F() = 
    G()
and G() =
    F()

See also Adventures in F# Co-Recursion.