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added closures

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This commit is contained in:
Moritz Gmeiner 2024-08-28 23:58:55 +02:00
commit b425a59db5
5 changed files with 59 additions and 28 deletions
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13
lib/value.ml
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@ -1,12 +1,12 @@
type lox_function = {
name : string;
env : environment;
arity : int;
(* env : Environment.environment; [@printer fun fmt _ -> fprintf fmt "<env>"] *)
arg_names : string list;
body : Stmt.stmt_node; [@printer fun fmt _ -> fprintf fmt "<body>"]
}
type native_function = {
and native_function = {
name : string;
arity : int;
fn : lox_value list -> (lox_value, string) result;
@ -20,6 +20,9 @@ and lox_value =
| Bool of bool
| Nil
and env_table = (string, lox_value) Hashtbl.t
and environment = { globals : env_table ref; locals : env_table list }
let string_of_lox_value lox_value =
match lox_value with
| Function { name; arity; _ } -> Printf.sprintf "<fn %s/%d>" name arity
@ -40,7 +43,7 @@ let type_string_of_lox_value lox_value =
let lox_value_to_bool lox_value = match lox_value with Bool b -> b | Nil -> false | _ -> true
let make_lox_function (name : string) (arg_names : string list) (body : Stmt.stmt_node) : lox_value
=
let make_lox_function (name : string) (env : environment) (arg_names : string list)
(body : Stmt.stmt_node) : lox_value =
let arity = List.length arg_names in
Function { name; arity; arg_names; body }
Function { name; env; arity; arg_names; body }