518 lines
16 KiB
OCaml
518 lines
16 KiB
OCaml
let test = Testing.test;;
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module SExpr = struct
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type t =
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Nil
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| Int of int
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| Flt of float
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| Cons of t * t
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| Id of string
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| Str of string
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let li1 s =
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Cons(s, Nil)
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exception Not_SExpr_List
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let rec append tl hd =
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match hd with
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Nil -> tl
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| Cons(x, rem) -> Cons(x, append tl rem)
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| _ -> raise Not_SExpr_List
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let () = test "SExpr.append" @@ begin fun () ->
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let a = Cons(Int 1, Cons(Int 2, Cons(Int 3, Nil)))
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and b = Cons(Int 4, Cons(Int 5, Nil))
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and ab = Cons(Int 1, Cons(Int 2, Cons(Int 3, Cons(Int 4, Cons(Int 5, Nil))))) in
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assert (append b a = ab)
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end
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let rec rem_nil x =
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match x with
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Cons(x, Nil) -> rem_nil x
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| Cons(l, r) -> Cons(l, rem_nil r)
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| x -> x
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let () = test "SExpr.rem_nil" @@ begin fun () ->
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let a = Cons(Int 1, Cons(Int 2, Cons(Int 3, Nil)))
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and p = Cons(Int 1, Cons(Int 2, Int 3)) in
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assert (rem_nil a = p)
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end
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let rec flat_map fn li =
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match li with
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Nil -> Nil
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| Cons(x, rem) -> append (flat_map fn rem) (fn x)
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| _ -> raise Not_SExpr_List
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let () = test "SExpr.flat_map.0" @@ begin fun () ->
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let a = Cons(Int 1, Cons(Int 2, Cons(Int 3, Nil)))
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and p = Nil in
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assert (flat_map (fun _ -> Nil) a = p)
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end
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let () = test "SExpr.flat_map.1" @@ begin fun () ->
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let a = Cons(Int 1, Cons(Int 2, Cons(Int 3, Nil)))
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and p = Cons(Int 2, Cons(Int 3, Cons(Int 4, Nil))) in
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assert (flat_map (fun x -> Cons((match x with Int(n) -> Int(n + 1) | x -> x) , Nil)) a = p)
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end
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let () = test "SExpr.flat_map.2" @@ begin fun () ->
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let a = Cons(Int 1, Cons(Int 2, Nil))
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and p = Cons(Int 1, Cons(Int 2, Cons(Int 2, Cons(Int 3, Nil)))) in
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assert (flat_map (fun x -> Cons(x, Cons((match x with Int(n) -> Int(n + 1) | x -> x) , Nil))) a = p)
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end
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let rec aggr_flat_map fn acc li =
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match li with
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Nil -> Nil, acc
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| Cons(x, rem) ->
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let x, acc = fn acc x in
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let vv, acc = aggr_flat_map fn acc rem in
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append vv x, acc
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| _ -> raise Not_SExpr_List
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let () = test "SExpr.aggr_flat_map.0" @@ begin fun () ->
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let a = Cons(Int 1, Cons(Int 2, Nil))
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and p = Cons(Int 1, Cons(Int 2, Cons(Int 2, Cons(Int 4, Nil)))) in
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assert (fst (aggr_flat_map (fun aggr x -> Cons(x, Cons((match x with Int(n) -> Int(n + aggr) | x -> x) , Nil)) , aggr + 1) 1 a) = p)
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end
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(* a "list" here is:
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* ( e1 . ( e2 . ( e3 . NIL ) ) )
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* or even just:
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* NIL
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*)
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let rec is_list s =
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match s with
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Nil -> true
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| Cons(a,b) -> is_list b
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| _ -> false
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let needs_surround_pipes x =
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String.contains x ' '
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|| String.contains x '\n'
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|| String.contains x '\r'
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|| String.contains x '\t'
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|| String.contains x '\b'
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let rec pp_t out (s:t) =
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let open Format in
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match s with
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Flt x -> fprintf out "%f" x
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| Int x -> fprintf out "%d" x
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| Str x ->
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fprintf out "\"";
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x |> String.iter begin fun x ->
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match x with
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'\\' -> fprintf out "\\\\"
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| '\r' -> fprintf out "\\r"
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| '\b' -> fprintf out "\\b"
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| '\n' -> fprintf out "\\n"
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| '\t' -> fprintf out "\\t"
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| _ -> fprintf out "%c" x
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end;
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fprintf out "\""
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| Id x ->
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if needs_surround_pipes x then
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fprintf out "|%s|" x
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else
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fprintf out "%s" x
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| Nil -> fprintf out "()"
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| Cons(a,b) ->
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if is_list b then begin
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fprintf out "@[(@[";
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pp_closed out s
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end else begin
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fprintf out "@[(@[";
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pp_t out a;
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fprintf out "@ . ";
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pp_t out b;
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fprintf out "@[)@["
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end
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and pp_closed out (s:t) =
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let open Format in
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match s with
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Flt x -> fprintf out "%f" x
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| Int x -> fprintf out "%d" x
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| Str x -> fprintf out "\"%s\"" x
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| Id x ->
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if needs_surround_pipes x then
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fprintf out "|%s|" x
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else
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fprintf out "%s" x
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| Nil -> fprintf out "@])@]"
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| Cons(a,b) ->
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pp_t out a;
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(match b with
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Nil -> ()
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| _ -> fprintf out "@ ");
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pp_closed out b
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let parse_inline () : Pc.cursor -> t * Pc.parse_result =
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let open Pc in
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let comment = chain (just ";") (repeat (also any (inv (just "\n")))) in
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let pad = either (ignore single_white) (ignore comment) in
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let pad = repeat pad in
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let padded p = (then_ignore (ignore_then pad p) pad) in
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recursive (fun expr ->
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let x_cons = nd_of3
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(just "(")
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begin
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chain expr (
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ignore_then
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(just ".")
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expr
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|> many)
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|> map (fun (head,tail) ->
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let li = List.rev (head :: tail) in
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let init = List.hd li in
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let others = List.rev(List.tl li) in
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List.fold_right (fun x acc -> Cons(x,acc)) others init)
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end
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(just ")")
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in
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let x_list = (nd_of3
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(padded (just "("))
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(repeat expr
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|> map (fun li ->
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List.fold_right (fun x acc -> Cons(x,acc)) li Nil))
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(just ")"))
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in
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let id_char = also any (inv begin
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(*-->> *) (ignore (just ";"))
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|> either (ignore single_white)
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|> either (ignore (just "("))
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|> either (ignore (just ")"))
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|> either (ignore (just "NIL"))
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|> either (ignore (just "|"))
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|> either (ignore (just "\""))
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end) in
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let escape = begin
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(*-->> *) also any (just "\"" |> inv)
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|> either (just "\\\\" |> set '\\')
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|> either (just "\\r" |> set '\r')
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|> either (just "\\t" |> set '\t')
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|> either (just "\\b" |> set '\b')
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|> either (just "\\n" |> set '\n')
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end in
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(* === expr === *)
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(*-->> *) (just "NIL" |> set Nil)
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|> either x_cons
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|> either x_list
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|> either (id_char |> many |> map
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(fun s -> Id(s |> List.to_seq |> String.of_seq )))
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|> either (nd_of3
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(just "|")
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begin also any (inv (just "|"))
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|> repeat
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|> map (fun s ->
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Id(s |> List.to_seq |> String.of_seq ))
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end
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(just "|")
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)
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|> either (p_int |> map (fun v -> Int(v)))
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|> either (p_flt |> map (fun v -> Flt(v)))
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|> either (nd_of3
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(just "\"")
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(escape
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|> repeat
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|> map (fun v -> Str(v |> List.to_seq |> String.of_seq)))
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(just "\""))
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|> padded
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)
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let parse_inline_end () =
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let open Pc in
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then_ignore (parse_inline ()) ex_end
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let parse_top () =
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let open Pc in
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parse_inline ()
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|> until ex_end
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|> map (fun li ->
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List.fold_right (fun x acc -> Cons(x,acc)) li Nil)
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let parser_tests = []
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end
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module SExprMacroExp = struct
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exception Misformated_Macro of SExpr.t
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exception Macro_Doesnt_App
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exception Not_Valid_Macro_Arg_Syntax
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exception FIXME of SExpr.t
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let num_expands = ref 0;;
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let assoc_all k li =
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li
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|> List.find_all (fun (x, _) -> x = k)
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|> List.map (fun (_, v) -> v)
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let () = test "SExprMacroExp.assoc_all" @@ begin fun () ->
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let li = [
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"asye","v4";
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"key","v1";
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"notkey","v2";
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"key","v3"
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] in
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assert (assoc_all "key" li = ["v1";"v3"])
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end
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let rec eval (ctx: (string * (SExpr.t * SExpr.t)) list) s =
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let open SExpr in
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let aggr_eval ctx s = begin
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let s, (ch,ctx) = aggr_flat_map (fun aggr s ->
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let ch1, ctx = aggr in
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let s, ch2, ctx = eval ctx s in
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s, ((ch1 || ch2), ctx)
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) (false, ctx) s in
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s, ch, ctx
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end in
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let s, ch1, ctx = match s with
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Cons(Id ":macro", Cons(name, Cons(margs, rr))) ->
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let rr, ch, ctx = aggr_eval ctx rr in
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Cons(Id ":macro", Cons(name, Cons(margs, rr))), ch, ctx
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| s when is_list s -> begin
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aggr_eval ctx s
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end
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| _ ->
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s, false, ctx
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in
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let s, ch2, ctx = check_expands ctx s in
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s, (ch1 || ch2), ctx
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(* expr -> list(new exprs) * bool:changed * ctx *)
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and check_expands ctx s =
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let open SExpr in
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match s with
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Cons(Id ":macro", r) -> begin
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let a = match r with
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Cons(Id(l), Cons(a,b)) -> l, (a,b)
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| _ -> raise @@ Misformated_Macro s
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in
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let ctx = (a :: ctx)
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|> List.sort (fun a b -> macro_req_score (fst (snd b)) - macro_req_score (fst (snd a)))
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in
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Nil, false, ctx
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end
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| Cons(Id ":atm-to-str", Cons(Id x, Nil))
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| Cons(Id ":atm-to-str", Cons(Str x, Nil)) ->
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li1 (Str x), true, ctx
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| Cons(Id ":atm-to-str", Cons(Int x, Nil)) ->
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li1 (Str (Int.to_string x)), true, ctx
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| Cons(Id ":atm-to-str", Cons(Flt x, Nil)) ->
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li1 (Str (Float.to_string x)), true, ctx
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| Cons(Id ":str-cat", Cons(Str l, Cons(Str r, Nil))) ->
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li1 (Str (l ^ r)), true, ctx
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| Cons(Id ":unpack", Cons(x, Nil)) when is_list x ->
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x, true, ctx
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| Cons(Id ":c-eq", Cons(l, Cons(r, Nil))) when l = r ->
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Nil, true, ctx
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| Cons(Id ":c-li0-eq", Cons( Cons(l, _) , Cons( r , Nil))) when l = r ->
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Nil, true, ctx
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| Cons(Id ":c-int", Cons(Int _, Nil)) ->
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Nil, true, ctx
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| Cons(Id ":c-float", Cons(Flt _, Nil)) ->
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Nil, true, ctx
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| Cons(Id ":c-num", Cons(Int _, Nil))
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| Cons(Id ":c-num", Cons(Flt _, Nil)) ->
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Nil, true, ctx
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| Cons(Id ":c-str", Cons(Str _, Nil)) ->
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Nil, true, ctx
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| Cons(Id ":c-id", Cons(Id _, Nil)) ->
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Nil, true, ctx
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| Cons(Id ":c-colon-id", Cons(Id x, Nil)) when String.contains x ':' ->
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Nil, true, ctx
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| Cons(Id ":c-list", Cons(x, Nil)) when is_list x ->
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Nil, true, ctx
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| Cons(Id ":c-atm", Cons(Int _, Nil))
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| Cons(Id ":c-atm", Cons(Flt _, Nil))
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| Cons(Id ":c-atm", Cons(Str _, Nil))
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| Cons(Id ":c-atm", Cons(Id _, Nil)) ->
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Nil, true, ctx
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| Cons(Id i, r) when String.starts_with ~prefix:":" i ->
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let i = String.sub i 1 ((String.length i) - 1) in
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check_expands_macro i ctx r s
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| Cons(_) ->
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check_expands_macro "@" ctx s s
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| s -> li1 s, false, ctx
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and check_expands_macro i ctx r s =
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let open SExpr in
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let rec test opt ctx =
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begin match opt with
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[] -> li1 s, false, ctx
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| hd :: tl ->
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try
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let o = expand_macro r hd ctx, true, ctx in
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(* Format.printf "expanded: %s, with: %a\n%!" i SExpr.pp_t r; *)
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o
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with Macro_Doesnt_App ->
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test tl ctx
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end
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in
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test (assoc_all i ctx) ctx
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and match_macro_arg args margs ctx =
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let open SExpr in
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match args, margs with
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Nil, Nil -> []
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| Cons(_), Cons(Id(".."), Cons(Id(rem),Nil)) -> [rem, args]
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| Cons(v,rl), Cons(Id(k), rr) -> [k,li1 v] @ match_macro_arg rl rr ctx
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| Cons(v,rl), Cons(Cons(Id k, Cons(cst, Nil)), rr) ->
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let cst_exp = expand_macro_eval cst ["_", li1 v] in
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let cst_exp, _ = eval_while ctx cst_exp in
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if cst_exp <> Nil then
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raise Macro_Doesnt_App;
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[k, li1 v] @ match_macro_arg rl rr ctx
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| _ -> raise Macro_Doesnt_App
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and macro_req_score args =
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let open SExpr in
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match args with
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Nil -> 0
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| Cons(Id(".."), Cons(Id(rem),Nil)) -> 1
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| Cons(Id _, rr) -> 100 + macro_req_score rr
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| Cons(Cons(Id _, Cons(_,Nil)), rr) -> 110 + macro_req_score rr
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| _ -> raise Not_Valid_Macro_Arg_Syntax
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and expand_macro_eval expr defs =
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let open SExpr in
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let perfm expr =
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begin match expr with
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Id(i) when String.starts_with ~prefix:"'" i ->
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li1 @@ Id(String.sub i 1 (String.length i - 1))
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| Id(i) -> begin match List.assoc_opt i defs with
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Some x -> x
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| None -> li1 expr
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end
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| x when is_list x -> li1 (expand_macro_eval x defs)
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| x -> li1 x
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end
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in
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if is_list expr then
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flat_map perfm expr
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else
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perfm expr
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and expand_macro args macro ctx =
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let margs, mbody = macro in
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let defs = match_macro_arg args margs ctx in
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num_expands := !num_expands + 1;
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expand_macro_eval mbody defs
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and eval_while ctx s = begin
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let s, ch, ctx = eval ctx s in
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if ch then
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SExpr.aggr_flat_map eval_while ctx s
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else
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s, ctx
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end
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and eval_root_while ctx s = begin
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let s, ch, ctx = eval ctx s in
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if ch then begin
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(* Format.printf "%a\n%!" SExpr.pp_t s; *)
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SExpr.aggr_flat_map eval_root_while ctx s
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end else
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s, ctx
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end
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let do_eval s =
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eval_root_while [] s |> fst
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let sparse src =
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Pc.doparse
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Format.err_formatter
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{ source = src; path = "top" }
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(SExpr.parse_top ())
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|> Option.get
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let () = test "SExprMacroExp.do_eval.unchanged_num" @@ begin fun () ->
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let open SExpr in
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let a = Int 1 in
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assert (do_eval a = li1 a)
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end
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let () = test "SExprMacroExp.do_eval.unchanged_list" ~depends:["SExprMacroExp.do_eval.unchanged_num"] @@ begin fun () ->
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let open SExpr in
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let a = Cons(Int 1, Cons(Int 2, Nil)) in
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assert (do_eval a = li1 a)
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end
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let () = test "SExprMacroExp.do_eval.unchanged_nested_list" ~depends:["SExprMacroExp.do_eval.unchanged_list"] @@ begin fun () ->
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let open SExpr in
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let a = Cons(Int 1, Cons( Cons(Int 10, Cons(Int 20, Nil)), Cons(Int 3, Nil))) in
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assert (do_eval a = li1 a)
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end
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let () = test "SExprMacroExp.do_eval.macro_no_body" ~depends:SExpr.parser_tests @@ begin fun () ->
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let open SExpr in
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let a = "(:macro one()) (:one)"
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and p = "()" in
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assert (do_eval (sparse a) = sparse p)
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end
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let () = test "SExprMacroExp.do_eval.macro_body" ~depends:SExpr.parser_tests @@ begin fun () ->
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let open SExpr in
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let a = "(:macro a() 1 2) (:a)"
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and p = "(1 2)" in
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assert (do_eval (sparse a) = sparse p)
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end
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let () = test "SExprMacroExp.do_eval.macro_arg" ~depends:SExpr.parser_tests @@ begin fun () ->
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let open SExpr in
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let a = "(:macro a(arg) 1 arg) (:a 2)"
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and p = "(1 2)" in
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assert (do_eval (sparse a) = sparse p)
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end
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let () = test "SExprMacroExp.do_eval.macro_args" ~depends:SExpr.parser_tests @@ begin fun () ->
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let open SExpr in
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let a = "(:macro a(arg arg2) arg2 1 arg) (:a 2 0)"
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and p = "(0 1 2)" in
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assert (do_eval (sparse a) = sparse p)
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end
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let () = test "SExprMacroExp.do_eval.macro_varargs" ~depends:SExpr.parser_tests @@ begin fun () ->
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let open SExpr in
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let a = "(:macro a(arg .. rem) arg 1 rem) (:a 0 2 3)"
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and p = "(0 1 2 3)" in
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assert (do_eval (sparse a) = sparse p)
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end
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let () = test "SExprMacroExp.do_eval.macro_varargs_notmatch_none" ~depends:SExpr.parser_tests @@ begin fun () ->
|
|
let open SExpr in
|
|
let a = "(:macro a(arg .. rem) arg 1 rem) (:a 0)"
|
|
and p = "((:a 0))" in
|
|
assert (do_eval (sparse a) = sparse p)
|
|
end
|
|
|
|
let () = test "SExprMacroExp.do_eval.macro_body_paren" ~depends:SExpr.parser_tests @@ begin fun () ->
|
|
let open SExpr in
|
|
let a = "(:macro a() (1)) (:a)"
|
|
and p = "((1))" in
|
|
assert (do_eval (sparse a) = sparse p)
|
|
end
|
|
end
|
|
|
|
|
|
let read_all_stdin () =
|
|
let buf = Buffer.create 4096 in
|
|
try
|
|
while true do
|
|
let line = input_line stdin in
|
|
Buffer.add_string buf line;
|
|
Buffer.add_char buf '\n';
|
|
done;
|
|
Buffer.contents buf
|
|
with End_of_file ->
|
|
Buffer.contents buf
|
|
|
|
|
|
let () =
|
|
let src = read_all_stdin () in
|
|
let v = SExprMacroExp.sparse src in
|
|
let v = SExprMacroExp.do_eval v in
|
|
|
|
Format.printf "; number of macro expansions: %d\n%!" !SExprMacroExp.num_expands;
|
|
|
|
Format.set_margin 40;
|
|
Format.printf "%a@.@?" SExpr.pp_t v;
|
|
|
|
exit 0
|