Update

lib/syntax/S.ml

@@ -99,6 +99,17 @@ module type Instruction = sig
     step:expression option ->
     t list ->
     t
+  (** 
+
+	for j = 1 to 5 step var:
+		stri = 1 & strmax = 3
+		for i = stri to strmax:
+            …
+		end
+	end
+
+
+   *)
 end
 
 module type Location = sig