Hi, all

 

I have a question on writing the interface file.

 

A.ml

 

type t = { x: int; y: int};;

let f c = c.x + c.y;;

 

B.ml

 

let val = {A.x =1 ; A.y = 2};;

A.f val;;

open A;;

f val;;

 

How to write a interface file for B.ml,

in which no functions are explicitly defined?

 

Thanks a lot!

 

Andy