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

		
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