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Stmt + Expr in Stack machine

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This commit is contained in:
Dmitry Boulytchev 2019-04-07 23:42:20 +03:00
parent d0c72844e8
commit d8ddf25a7f
6 changed files with 125 additions and 100 deletions
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21
src/Language.ml
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@ -19,7 +19,7 @@ module Value =
@type t =
| Empty
| Var of string
| Elem of t * int
| Elem of t * int
| Int of int
| String of bytes
| Array of t array
@ -49,7 +49,12 @@ module Value =
let update_string s i x = Bytes.set s i x; s
let update_array a i x = a.(i) <- x; a
let update_elem x i v =
match x with
| Sexp (_, a) | Array a -> ignore (update_array a i v)
| String a -> ignore (update_string a i (Char.chr @@ to_int v))
let string_val v =
let buf = Buffer.create 128 in
let append s = Buffer.add_string buf s in
@ -148,7 +153,7 @@ module Builtin =
let eval (st, i, o, vs) args = function
| "read" -> (match i with z::i' -> (st, i', o, (Value.of_int z)::vs) | _ -> failwith "Unexpected end of input")
| "write" -> (st, i, o @ [Value.to_int @@ List.hd args], vs)
| "write" -> (st, i, o @ [Value.to_int @@ List.hd args], (*Value.Empty ::*) vs)
| ".elem" -> let [b; j] = args in
(st, i, o, let i = Value.to_int j in
(match b with
@ -265,13 +270,8 @@ module Expr =
let update st x v =
match x with
| Value.Var x -> State.update x v st
| Value.Elem (x, i) ->
(match x with
| Value.Sexp (_, a) | Value.Array a -> ignore (Value.update_array a i v)
| Value.String a -> ignore (Value.update_string a i (Char.chr @@ Value.to_int v))
);
st
| Value.Elem (x, i) -> Value.update_elem x i v; st
(* Expression evaluator
val eval : env -> config -> k -> t -> config
@ -315,7 +315,6 @@ module Expr =
| n -> fun h::tl -> let tl', rest = take (n-1) tl in h :: tl', rest
let rec eval env ((st, i, o, vs) as conf) k expr =
(*Printf.printf "eval: %s\n" (show(list) (show(Value.t)) vs); flush stdout; *)
match expr with
| Control f ->
let s, conf' = f conf in