mirror of
https://github.com/MorizzG/MLox.git
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46 lines
1.5 KiB
OCaml
46 lines
1.5 KiB
OCaml
type lox_function = {
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name : string;
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arity : int;
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arg_names : string list;
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body : Stmt.stmt_node; [@printer fun fmt _ -> fprintf fmt "<body>"]
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}
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[@@deriving show { with_path = false }]
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type native_function = {
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name : string;
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arity : int;
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fn : lox_value list -> (lox_value, string) result;
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}
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[@@deriving show { with_path = false }]
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and function_ = NativeFunction of native_function | LoxFunction of lox_function
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[@@deriving show { with_path = false }]
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and lox_value = Function of function_ | String of string | Number of float | Bool of bool | Nil
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[@@deriving show { with_path = false }]
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let string_of_lox_value lox_value =
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match lox_value with
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| Function (NativeFunction { name; arity; _ }) -> Printf.sprintf "<native fn %s/%d>" name arity
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| Function (LoxFunction { name; arity; _ }) -> Printf.sprintf "<fn %s/%d>" name arity
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| String s -> s
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| Number x -> if Float.is_integer x then string_of_int (Int.of_float x) else string_of_float x
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| Bool b -> string_of_bool b
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| Nil -> "nil"
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let type_string_of_lox_value lox_value =
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match lox_value with
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| Function (NativeFunction _) -> "NativeFunction"
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| Function (LoxFunction _) -> "Function"
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| String _ -> "String"
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| Number _ -> "Number"
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| Bool _ -> "Bool"
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| Nil -> "Nil"
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let lox_value_to_bool lox_value = match lox_value with Bool b -> b | Nil -> false | _ -> true
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let make_lox_function (name : string) (arg_names : string list) (body : Stmt.stmt_node) : lox_value
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=
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let arity = List.length arg_names in
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let fn = LoxFunction { name; arity; arg_names; body } in
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Function fn
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