X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=ocaml%2Fparser_andrea.ml;fp=ocaml%2Fparser_andrea.ml;h=0000000000000000000000000000000000000000;hb=f1873841a3271d332cb8429b46e7bc7e0bca2402;hp=fbce730c78915d11457b701ee46691fef2cae988;hpb=3ba5ecfc8372d4c9f380bad5cdf7387f2bbcea6a;p=fireball-separation.git

diff --git a/ocaml/parser_andrea.ml b/ocaml/parser_andrea.ml
deleted file mode 100644
index fbce730..0000000
--- a/ocaml/parser_andrea.ml
+++ /dev/null
@@ -1,266 +0,0 @@
-type term =
-  | Var of int
-  | App of term * term
-  | Lam of term
-;;
-
-let mk_app x y = App(x, y);;
-let mk_lam x = Lam x;;
-let mk_var x = Var x;;
-
-exception ParsingError of string;;
-
-let isAlphaNum c = let n = Char.code c in
- (48 <= n && n <= 90) || (95 <= n && n <= 122) ;;
-let isSpace c = c = ' ' || c = '\n' || c = '\t' ;;
-
-(* FIXME *)
-let mk_var' (bound, free) x =
-  if x <> "@" && List.mem x bound
-  then free, mk_var (Util.index_of x bound)
-  else if x <> "@" && List.mem x free
-       then free, mk_var (List.length bound + Util.index_of x free)
-       else (free @ [x]), mk_var (List.length bound + List.length free)
-;;
-
-let mk_app' = function
-  | [] ->  assert false
-  | t :: ts -> List.fold_left mk_app t ts
-;;
-
-let explode s =
- let len = String.length s in
-  let rec aux i l =
-    if i >= len || s.[i] = '#' then l else aux (i+1) (s.[i] :: l)
-  in List.rev (aux 0 [])
-;;
-
-let implode l =
-  let res = String.create (List.length l) in
-  let rec aux i = function
-    | [] -> res
-    | c :: l -> String.set res i c; aux (i + 1) l in
-  aux 0 l
-;;
-
-let rec strip_spaces = function
-  | c::cs when isSpace c -> strip_spaces cs
-  | cs -> cs
-;;
-
-let read_var s =
-  let rec aux = function
-  | [] -> None, []
-  | c::cs as x ->
-    if c = '@' then
-     (if cs <> [] && (let hd = List.hd cs in hd = '@' || isAlphaNum hd)
-     then raise (ParsingError ("Unexpected `"^String.make 1 (List.hd cs)^"` after `@`."))
-     else Some['@'], cs)
-    else if isAlphaNum c
-    then match aux cs with
-         | (Some x), cs' -> Some (c :: x), cs'
-         | None, cs' -> (Some [c]), cs'
-    else None, x
-  in match aux s with
-    | None, y -> None, y
-    | Some x, y -> Some (implode x), y
-;;
-
-let read_var' (bound, free as vars) s =
-  match read_var s with
-  | Some varname, cs ->
-    let free, v = mk_var' vars varname in
-    Some [v], cs, (bound, free)
-  | None, _ -> raise (ParsingError ("Can't read variable"))
-;;
-
-let rec read_smt vars =
-  let check_if_lambda cs = match read_var cs with
-    | None, _ -> false
-    | Some x, cs -> match strip_spaces cs with
-      | [] -> false
-      | c::_ -> c = '.'
-  in let read_lambda (bound, free) cs = (
-    match read_var (strip_spaces cs) with
-      | Some varname, cs ->
-      let vars' = (varname::bound, free) in
-      (match strip_spaces cs with
-        | [] -> raise (ParsingError "Lambda expression incomplete")
-        | c::cs -> (if c = '.' then (match read_smt vars' cs with
-          | None, _, _ -> raise (ParsingError "Lambda body expected")
-          | Some [x], y, (_, free) -> Some [mk_lam x], y, (bound, free)
-          | Some _, _, _ -> assert false
-          ) else raise (ParsingError "Expected `.` after variable in lambda")
-        ))
-      | _, _ -> assert false
- ) in let rec aux vars cs =
-  match strip_spaces cs with
-  | [] -> None, [], vars
-  | c::_ as x ->
-      let tms, cs, vars = (
-           if c = '(' then read_pars vars x
-      else if c = ')' then (None, x, vars)
-      else if check_if_lambda x then read_lambda vars x
-      else read_var' vars x) in
-      match tms with
-      | Some [tm] -> (
-        match aux vars cs with
-          | None, cs, vars -> Some [tm], cs, vars
-          | Some ts, cs, vars -> Some (tm :: ts), cs, vars
-        )
-      | Some _ -> assert false
-      | None -> None, x, vars
-  in fun cs -> match aux vars cs with
-    | None, cs, vars -> None, cs, vars
-    | Some ts, cs, vars -> Some [mk_app' ts], cs, vars
-and read_pars vars = function
-  | [] -> None, [], vars
-  | c::cs -> if c = '(' then (
-    let tm, cs, vars = read_smt vars cs in
-    let cs = strip_spaces cs in
-    match cs with
-      | [] -> None, [], vars
-      | c::cs -> if c = ')' then tm, cs, vars else raise (ParsingError "Missing `)`")
-    ) else assert false
-;;
-
-let parse x =
-  match read_smt ([],[]) (explode x) with
-  | Some [y], [], _ -> y
-  | _, _, _ -> assert false
-;;
-
-let parse_many strs =
-  let f (x, y) z = match read_smt y (explode z) with
-  | Some[tm], [], vars -> (tm :: x, vars)
-  | _, _, _ -> assert false
-  in let aux = List.fold_left f ([], ([], []))
-  in let (tms, (_, free)) = aux strs
-  in (List.rev tms, free)
-;;
-
-(**********************************************************************
-
-let rec string_of_term = function
-  | Tvar n -> string_of_int n
-  | Tapp(t1, t2) -> "(" ^ string_of_term t1 ^ " " ^ string_of_term t2 ^ ")"
-  | Tlam(t1) -> "(\\" ^ string_of_term t1 ^ ")"
-;;
-
-let _ = prerr_endline (">>>" ^ string_of_term (parse "(\\x. x y z z1 k) z1 z j"));;
-
-
-*******************************************************************************)
-
-(* let problem_of_string s =
- let lines = Str.split (Str.regexp "[\n\r\x0c\t;]+") s in
- let head, lines = List.hd lines, List.tl lines in
- let name = String.trim (String.sub head 1 (String.length head - 1)) in
- let lines = List.filter ((<>) "") lines in
- let aux (last, div, conv, ps) line =
-  let chr = String.sub line 0 1 in
-  let line = String.trim (String.sub line 1 (String.length line - 1)) in
-  if line = "" then chr, div, conv, ps else
-  let rec aux' chr line =
-   if chr = "#"
-    then chr, div, conv, ps
-   else if chr = "D"
-    then chr, line, conv, ps
-   else if chr = "C"
-    then chr, div, line::conv, ps
-   else if chr = "N"
-    then chr, div, conv, line::ps
-   else if chr = " "
-    then aux' last line
-   else raise (ParsingError
-     ("Unexpected at beginning of problem: `" ^ chr ^ "` " ^ line)) in
-  aux' chr line in
- let _, div, conv, ps = List.fold_left aux ("#", "", [], []) lines in
- let div_provided = div <> "" in
- let div = if div_provided then div else "BOT" in
- let strs = [div] @ ps @ conv in
-
- if List.length ps = 0 && List.length conv = 0
-  then raise (ParsingError "Parsed empty problem");
-
- (* parse' *)
- let (tms, free) = parse_many strs in
- (* Replace pacmans and bottoms *)
- let n_bot = try Util.index_of "BOT" free with Not_found -> min_int in
- let n_pac = try Util.index_of "PAC" free with Not_found -> min_int in
- let n_bomb = try Util.index_of "BOMB" free with Not_found -> min_int in
- let fix lev v =
-  if v = lev + n_bot then `Bottom
-   else if v = lev + n_pac then `Pacman
-    else if v = lev + n_bomb then `Lam(true, `Bottom)
-    else if v = lev then `Var(v, min_int) (* zero *)
-     else `Var(v,1) in (* 1 by default when variable not applied *)
- (* Fix arity *)
- let open Num in
- let exclude_bottom = function
- | #nf_nob as t -> t
- (* actually, the following may be assert false *)
- | `Bottom -> raise (ParsingError "Input term not in normal form") in
- let rec aux_nob lev : nf_nob -> nf = function
- | `I((n,_), args) -> `I((n,(if lev = 0 then 0 else 1) + Listx.length args), Listx.map (fun t -> exclude_bottom (aux_nob lev t)) args)
- | `Var(n,_) -> fix lev n
- | `Lam(_,t) -> `Lam (true, aux (lev+1) t)
- | `Match _ | `N _ -> assert false
- | `Pacman -> `Pacman
- and aux lev : Num.nf -> Num.nf = function
-  | #nf_nob as t -> aux_nob lev t
-  | `Bottom -> assert false in
-let all_tms = List.map (aux 0) (tms :> Num.nf list) in
-
-(* problem_of *)
-let div, (ps, conv) = List.hd all_tms, Util.list_cut (List.length ps, List.tl all_tms) in
-
-let div = if not div_provided || div = `Bottom
- then None
- else match div with
-  | `I _ as t -> Some t
-  | _ -> raise (ParsingError "D is not an inert in the initial problem") in
-let conv = Util.filter_map (
- function
- | #i_n_var as t -> Some t
- | `Lam _ -> None
- | _ -> raise (ParsingError "A C-term is not i_n_var")
- ) conv in
-let ps = List.map (
- function
-  | #i_n_var as y -> y
-  | _ -> raise (ParsingError "An N-term is not i_n_var")
- ) ps in
- name, div, conv, ps, free
-;;
-
-
-let from_file path =
- let lines = ref ["#"] in
- let chan = open_in path in
- let _ = try
-  while true; do
-    lines := input_line chan :: !lines
-  done
- with End_of_file ->
-  close_in chan in
- let txt = String.concat "\n" (List.rev !lines) in
- let problems = Str.split (Str.regexp "[\n\r]+\\$") txt in
- List.map problem_of_string (List.tl (List.map ((^) "$") problems))
-;; *)
-
-let parse x =
-  match read_smt ([],[]) (explode x) with
-  | Some [y], [], _ -> y
-  | _, _, _ -> assert false
-;;
-
-
-let parse_many strs =
-  let f (x, y) z = match read_smt y (explode z) with
-  | Some[tm], [], vars -> (tm :: x, vars)
-  | _, _, _ -> assert false
-  in let aux = List.fold_left f ([], ([], []))
-  in let (tms, (_, free)) = aux strs
-  in (List.rev tms, free)
-;;