| 1 | open Printf |
| 2 | |
| 3 | module Sym = Tiger_symbol |
| 4 | |
| 5 | module Counter : sig |
| 6 | type t |
| 7 | |
| 8 | val create : unit -> t |
| 9 | |
| 10 | val next : t -> int |
| 11 | end = struct |
| 12 | type t = int ref |
| 13 | |
| 14 | let create () = |
| 15 | ref 0 |
| 16 | |
| 17 | let next t = |
| 18 | incr t; |
| 19 | !t |
| 20 | end |
| 21 | |
| 22 | module Temp = struct |
| 23 | type t = int |
| 24 | |
| 25 | let t = Counter.create () |
| 26 | |
| 27 | let gen () = |
| 28 | Counter.next t |
| 29 | |
| 30 | let to_string t = |
| 31 | sprintf "t%d" t |
| 32 | end |
| 33 | |
| 34 | module Label = struct |
| 35 | type t = Sym.t |
| 36 | |
| 37 | let counter = Counter.create () |
| 38 | |
| 39 | let of_string = |
| 40 | Sym.of_string |
| 41 | |
| 42 | let gen () = |
| 43 | of_string (sprintf "L%d" (Counter.next counter)) |
| 44 | |
| 45 | let to_string = |
| 46 | Sym.to_string |
| 47 | end |