; symbol : int
}
-let counter = ref 0
+let next =
+ let counter = ref 0 in
+ fun () ->
+ incr counter;
+ !counter
let symbols = H.create 16
-let next name =
- incr counter;
- let symbol = !counter in
- {name; symbol}
-
-let new_of_string name =
- let t = next name in
- H.replace symbols ~key:t.name ~data:t.symbol;
- t
+let unique_of_string name =
+ {name; symbol = next ()}
let of_string name =
match H.find_opt symbols name with
- | Some s -> {name; symbol=s}
- | None -> new_of_string name
+ | Some symbol ->
+ {name; symbol}
+ | None ->
+ let t = unique_of_string name in
+ H.replace symbols ~key:t.name ~data:t.symbol;
+ t
let to_string {name; _} =
name