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