+++ /dev/null
-(* Copyright (C) 2004, HELM Team.
- *
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- *
- * HELM is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * HELM is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * For details, see the HELM World-Wide-Web page,
- * http://helm.cs.unibo.it/
- *)
-
-open Printf
-
-open DisambiguateTypes
-open UriManager
-
-exception No_choices of domain_item
-exception NoWellTypedInterpretation
-
- (** raised when an environment is not enough informative to decide *)
-exception Try_again
-
-let debug = true
-let debug_print = if debug then prerr_endline else ignore
-
-let descr_of_domain_item = function
- | Id s -> s
- | Symbol (s, _) -> s
- | Num i -> string_of_int i
-
-type test_result =
- | Ok of Cic.term * Cic.metasenv
- | Ko
- | Uncertain
-
-let refine metasenv context term =
- let metasenv, term = CicMkImplicit.expand_implicits metasenv context term in
- debug_print (sprintf "TEST_INTERPRETATION: %s" (CicPp.ppterm term));
- try
- let term', _, metasenv' = CicRefine.type_of_aux' metasenv context term in
- Ok (term', metasenv')
- with
- | CicRefine.Uncertain _ ->
- debug_print ("%%% UNCERTAIN!!! " ^ CicPp.ppterm term) ;
- Uncertain
- | CicRefine.RefineFailure _ ->
- debug_print ("%%% PRUNED!!! " ^ CicPp.ppterm term) ;
- Ko
-
-let resolve (env: environment) (item: domain_item) ?(num = "") ?(args = []) () =
- try
- snd (Environment.find item env) env num args
- with Not_found -> assert false
-
- (* TODO move it to Cic *)
-let find_in_environment name context =
- let rec aux acc = function
- | [] -> raise Not_found
- | Cic.Name hd :: tl when hd = name -> acc
- | _ :: tl -> aux (acc + 1) tl
- in
- aux 1 context
-
-let interpretate ~context ~env ast =
- let rec aux loc context = function
- | CicAst.AttributedTerm (`Loc loc, term) ->
- aux loc context term
- | CicAst.AttributedTerm (_, term) -> aux loc context term
- | CicAst.Appl (CicAst.Symbol (symb, i) :: args) ->
- let cic_args = List.map (aux loc context) args in
- resolve env (Symbol (symb, i)) ~args:cic_args ()
- | CicAst.Appl terms -> Cic.Appl (List.map (aux loc context) terms)
- | CicAst.Binder (binder_kind, (var, typ), body) ->
- let cic_type = aux_option loc context typ in
- let cic_body = aux loc (var :: context) body in
- (match binder_kind with
- | `Lambda -> Cic.Lambda (var, cic_type, cic_body)
- | `Pi | `Forall -> Cic.Prod (var, cic_type, cic_body)
- | `Exists ->
- resolve env (Symbol ("exists", 0))
- ~args:[ cic_type; Cic.Lambda (var, cic_type, cic_body) ] ())
- | CicAst.Case (term, indty_ident, outtype, branches) ->
- let cic_term = aux loc context term in
- let cic_outtype = aux_option loc context outtype in
- let do_branch ((head, args), term) =
- let rec do_branch' context = function
- | [] -> aux loc context term
- | (name, typ) :: tl ->
- let cic_body = do_branch' (name :: context) tl in
- let typ =
- match typ with
- | None -> Cic.Implicit (Some `Type)
- | Some typ -> aux loc context typ
- in
- Cic.Lambda (name, typ, cic_body)
- in
- do_branch' context args
- in
- let (indtype_uri, indtype_no) =
- match indty_ident with
- | Some indty_ident ->
- (match resolve env (Id indty_ident) () with
- | Cic.MutInd (uri, tyno, _) -> (uri, tyno)
- | Cic.Implicit _ -> raise Try_again
- | _ -> raise DisambiguateChoices.Invalid_choice)
- | None ->
- let fst_constructor =
- match branches with
- | ((head, _), _) :: _ -> head
- | [] -> raise DisambiguateChoices.Invalid_choice
- in
- (match resolve env (Id fst_constructor) () with
- | Cic.MutConstruct (indtype_uri, indtype_no, _, _) ->
- (indtype_uri, indtype_no)
- | Cic.Implicit _ -> raise Try_again
- | _ -> raise DisambiguateChoices.Invalid_choice)
- in
- Cic.MutCase (indtype_uri, indtype_no, cic_outtype, cic_term,
- (List.map do_branch branches))
- | CicAst.LetIn ((name, typ), def, body) ->
- let cic_def = aux loc context def in
- let cic_def =
- match typ with
- | None -> cic_def
- | Some t -> Cic.Cast (cic_def, aux loc context t)
- in
- let cic_body = aux loc (name :: context) body in
- Cic.LetIn (name, cic_def, cic_body)
- | CicAst.LetRec (kind, defs, body) ->
- let context' =
- List.fold_left (fun acc ((name, _), _, _) -> name :: acc)
- context defs
- in
- let cic_body = aux loc context' body in
- let inductiveFuns =
- List.map
- (fun ((name, typ), body, decr_idx) ->
- let cic_body = aux loc context' body in
- let cic_type = aux_option loc context typ in
- let name =
- match name with
- | Cic.Anonymous ->
- CicTextualParser2.fail loc
- "Recursive functions cannot be anonymous"
- | Cic.Name name -> name
- in
- (name, decr_idx, cic_type, cic_body))
- defs
- in
- let counter = ref ~-1 in
- let build_term funs =
- (* this is the body of the fold_right function below. Rationale: Fix
- * and CoFix cases differs only in an additional index in the
- * inductiveFun list, see Cic.term *)
- match kind with
- | `Inductive ->
- (fun (var, _, _, _) cic ->
- incr counter;
- Cic.LetIn (Cic.Name var, Cic.Fix (!counter, funs), cic))
- | `CoInductive ->
- let funs =
- List.map (fun (name, _, typ, body) -> (name, typ, body)) funs
- in
- (fun (var, _, _, _) cic ->
- incr counter;
- Cic.LetIn (Cic.Name var, Cic.CoFix (!counter, funs), cic))
- in
- List.fold_right (build_term inductiveFuns) inductiveFuns cic_body
- | CicAst.Ident (name, subst) ->
- (try
- let index = find_in_environment name context in
- if subst <> None then
- CicTextualParser2.fail loc
- "Explicit substitutions not allowed here";
- Cic.Rel index
- with Not_found ->
- let cic = resolve env (Id name) () in
- let mk_subst uris =
- let ids_to_uris =
- List.map (fun uri -> UriManager.name_of_uri uri, uri) uris
- in
- (match subst with
- | Some subst ->
- List.map
- (fun (s, term) ->
- (try
- List.assoc s ids_to_uris, aux loc context term
- with Not_found ->
- raise DisambiguateChoices.Invalid_choice))
- subst
- | None -> List.map (fun uri -> uri, Cic.Implicit None) uris)
- in
- (match cic with
- | Cic.Const (uri, []) ->
- let uris =
- match CicEnvironment.get_obj uri with
- | Cic.Constant (_, _, _, uris) -> uris
- | _ -> assert false
- in
- Cic.Const (uri, mk_subst uris)
- | Cic.Var (uri, []) ->
- let uris =
- match CicEnvironment.get_obj uri with
- | Cic.Variable (_, _, _, uris) -> uris
- | _ -> assert false
- in
- Cic.Var (uri, mk_subst uris)
- | Cic.MutInd (uri, i, []) ->
- let uris =
- match CicEnvironment.get_obj uri with
- | Cic.InductiveDefinition (_, uris, _) -> uris
- | _ -> assert false
- in
- Cic.MutInd (uri, i, mk_subst uris)
- | Cic.MutConstruct (uri, i, j, []) ->
- let uris =
- match CicEnvironment.get_obj uri with
- | Cic.InductiveDefinition (_, uris, _) -> uris
- | _ -> assert false
- in
- Cic.MutConstruct (uri, i, j, mk_subst uris)
- | Cic.Meta _ | Cic.Implicit _ as t ->
-(*
- prerr_endline (sprintf
- "Warning: %s must be instantiated with _[%s] but we do not enforce it"
- (CicPp.ppterm t)
- (String.concat "; "
- (List.map
- (fun (s, term) -> s ^ " := " ^ CicAstPp.pp_term term)
- subst)));
-*)
- t
- | _ ->
- raise DisambiguateChoices.Invalid_choice))
- | CicAst.Implicit -> Cic.Implicit None
- | CicAst.Num (num, i) -> resolve env (Num i) ~num ()
- | CicAst.Meta (index, subst) ->
- let cic_subst =
- List.map
- (function None -> None | Some term -> Some (aux loc context term))
- subst
- in
- Cic.Meta (index, cic_subst)
- | CicAst.Sort `Prop -> Cic.Sort Cic.Prop
- | CicAst.Sort `Set -> Cic.Sort Cic.Set
- | CicAst.Sort `Type -> Cic.Sort (Cic.Type (CicUniv.fresh())) (* TASSI *)
- | CicAst.Sort `CProp -> Cic.Sort Cic.CProp
- | CicAst.Symbol (symbol, instance) ->
- resolve env (Symbol (symbol, instance)) ()
- and aux_option loc context = function
- | None -> Cic.Implicit (Some `Type)
- | Some term -> aux loc context term
- in
- match ast with
- | CicAst.AttributedTerm (`Loc loc, term) -> aux loc context term
- | term -> aux (-1, -1) context term
-
-let domain_of_term ~context ast =
- (* "aux" keeps domain in reverse order and doesn't care about duplicates.
- * Domain item more in deep in the list will be processed first.
- *)
- let rec aux loc context = function
- | CicAst.AttributedTerm (`Loc loc, term) -> aux loc context term
- | CicAst.AttributedTerm (_, term) -> aux loc context term
- | CicAst.Appl terms ->
- List.fold_left (fun dom term -> aux loc context term @ dom) [] terms
- | CicAst.Binder (kind, (var, typ), body) ->
- let kind_dom =
- match kind with
- | `Exists -> [ Symbol ("exists", 0) ]
- | _ -> []
- in
- let type_dom = aux_option loc context typ in
- let body_dom = aux loc (var :: context) body in
- body_dom @ type_dom @ kind_dom
- | CicAst.Case (term, indty_ident, outtype, branches) ->
- let term_dom = aux loc context term in
- let outtype_dom = aux_option loc context outtype in
- let do_branch ((head, args), term) =
- let (term_context, args_domain) =
- List.fold_left
- (fun (cont, dom) (name, typ) ->
- (name :: cont,
- (match typ with
- | None -> dom
- | Some typ -> aux loc cont typ @ dom)))
- (context, []) args
- in
- args_domain @ aux loc term_context term
- in
- let branches_dom =
- List.fold_left (fun dom branch -> do_branch branch @ dom) [] branches
- in
- branches_dom @ outtype_dom @ term_dom @
- (match indty_ident with None -> [] | Some ident -> [ Id ident ])
- | CicAst.LetIn ((var, typ), body, where) ->
- let body_dom = aux loc context body in
- let type_dom = aux_option loc context typ in
- let where_dom = aux loc (var :: context) where in
- where_dom @ type_dom @ body_dom
- | CicAst.LetRec (kind, defs, where) ->
- let context' =
- List.fold_left (fun acc ((var, typ), _, _) -> var :: acc)
- context defs
- in
- let where_dom = aux loc context' where in
- let defs_dom =
- List.fold_left
- (fun dom ((_, typ), body, _) ->
- aux loc context' body @ aux_option loc context typ)
- [] defs
- in
- where_dom @ defs_dom
- | CicAst.Ident (name, subst) ->
- (try
- let index = find_in_environment name context in
- if subst <> None then
- CicTextualParser2.fail loc
- "Explicit substitutions not allowed here"
- else
- []
- with Not_found ->
- (match subst with
- | None -> [Id name]
- | Some subst ->
- List.fold_left
- (fun dom (_, term) ->
- let dom' = aux loc context term in
- dom' @ dom)
- [Id name] subst))
- | CicAst.Implicit -> []
- | CicAst.Num (num, i) -> [ Num i ]
- | CicAst.Meta (index, local_context) ->
- List.fold_left (fun dom term -> aux_option loc context term @ dom) []
- local_context
- | CicAst.Sort _ -> []
- | CicAst.Symbol (symbol, instance) -> [ Symbol (symbol, instance) ]
-
- and aux_option loc context = function
- | None -> []
- | Some t -> aux loc context t
- in
-
- (* e.g. [5;1;1;1;2;3;4;1;2] -> [2;1;4;3;5] *)
- let rev_uniq =
- let module SortedItem =
- struct
- type t = DisambiguateTypes.domain_item
- let compare = Pervasives.compare
- end
- in
- let module Set = Set.Make (SortedItem) in
- fun l ->
- let rev_l = List.rev l in
- let (_, uniq_rev_l) =
- List.fold_left
- (fun (members, rev_l) elt ->
- if Set.mem elt members then
- (members, rev_l)
- else
- Set.add elt members, elt :: rev_l)
- (Set.empty, []) rev_l
- in
- List.rev uniq_rev_l
- in
-
- rev_uniq
- (match ast with
- | CicAst.AttributedTerm (`Loc loc, term) -> aux loc context term
- | term -> aux (-1, -1) context term)
-
-
- (* dom1 \ dom2 *)
-let domain_diff dom1 dom2 =
-(* let domain_diff = Domain.diff *)
- let is_in_dom2 =
- List.fold_left (fun pred elt -> (fun elt' -> elt' = elt || pred elt'))
- (fun _ -> false) dom2
- in
- List.filter (fun elt -> not (is_in_dom2 elt)) dom1
-
-module Make (C: Callbacks) =
- struct
- let choices_of_id mqi_handle id =
- let query = MQueryGenerator.locate id in
- let result = MQueryInterpreter.execute mqi_handle query in
- let uris =
- List.map
- (function uri,_ ->
- MQueryMisc.wrong_xpointer_format_from_wrong_xpointer_format' uri
- ) result in
- let uris' =
- match uris with
- | [] ->
- [UriManager.string_of_uri (C.input_or_locate_uri
- ~title:("URI matching \"" ^ id ^ "\" unknown.") ~id ())]
- | [uri] -> [uri]
- | _ ->
- C.interactive_user_uri_choice ~selection_mode:`MULTIPLE
- ~ok:"Try selected." ~enable_button_for_non_vars:true
- ~title:"Ambiguous input." ~id
- ~msg: ("Ambiguous input \"" ^ id ^
- "\". Please, choose one or more interpretations:")
- uris
- in
- List.map
- (fun uri ->
- (uri,
- let term =
- try
- HelmLibraryObjects.term_of_uri (UriManager.uri_of_string uri)
- with _ -> assert false
- in
- fun _ _ _ -> term))
- uris'
-
- let disambiguate_term mqi_handle context metasenv term ~aliases:current_env
- =
- debug_print "NEW DISAMBIGUATE INPUT";
- let disambiguate_context = (* cic context -> disambiguate context *)
- List.map
- (function None -> Cic.Anonymous | Some (name, _) -> name)
- context
- in
- let term_dom = domain_of_term ~context:disambiguate_context term in
- debug_print (sprintf "DISAMBIGUATION DOMAIN: %s"
- (string_of_domain term_dom));
- let current_dom =
- Environment.fold (fun item _ dom -> item :: dom) current_env []
- in
- let todo_dom = domain_diff term_dom current_dom in
- (* (2) lookup function for any item (Id/Symbol/Num) *)
- let lookup_choices =
- let id_choices = Hashtbl.create 1023 in
- fun item ->
- let choices =
- match item with
- | Id id ->
- (try
- Hashtbl.find id_choices id
- with Not_found ->
- let choices = choices_of_id mqi_handle id in
- Hashtbl.add id_choices id choices;
- choices)
- | Symbol (symb, _) -> DisambiguateChoices.lookup_symbol_choices symb
- | Num instance -> DisambiguateChoices.lookup_num_choices ()
- in
- if choices = [] then raise (No_choices item);
- choices
- in
- (* (3) test an interpretation filling with meta uninterpreted identifiers
- *)
- let test_env current_env todo_dom =
- let filled_env =
- List.fold_left
- (fun env item ->
- Environment.add item
- ("Implicit",
- (match item with
- | Id _ | Num _ -> (fun _ _ _ -> Cic.Implicit (Some `Closed))
- | Symbol _ -> (fun _ _ _ -> Cic.Implicit None))) env)
- current_env todo_dom
- in
- try
- let cic_term =
- interpretate ~context:disambiguate_context ~env:filled_env term
- in
- refine metasenv context cic_term
- with
- | Try_again -> Uncertain
- | DisambiguateChoices.Invalid_choice -> Ko
- in
- (* (4) build all possible interpretations *)
- let rec aux current_env todo_dom =
- match todo_dom with
- | [] ->
- (match test_env current_env [] with
- | Ok (term, metasenv) -> [ current_env, metasenv, term ]
- | Ko | Uncertain -> [])
- | item :: remaining_dom ->
- debug_print (sprintf "CHOOSED ITEM: %s"
- (string_of_domain_item item));
- let choices = lookup_choices item in
- let rec filter = function
- | [] -> []
- | codomain_item :: tl ->
- debug_print (sprintf "%s CHOSEN" (fst codomain_item)) ;
- let new_env =
- Environment.add item codomain_item current_env
- in
- (match test_env new_env remaining_dom with
- | Ok (term, metasenv) ->
- (match remaining_dom with
- | [] -> [ new_env, metasenv, term ]
- | _ -> aux new_env remaining_dom) @ filter tl
- | Uncertain ->
- (match remaining_dom with
- | [] -> []
- | _ -> aux new_env remaining_dom) @ filter tl
- | Ko -> filter tl)
- in
- filter choices
- in
- match aux current_env todo_dom with
- | [] -> raise NoWellTypedInterpretation
- | [ _ ] as l ->
- debug_print "UNA SOLA SCELTA";
- l
- | l ->
- debug_print (sprintf "PIU' SCELTE (%d)" (List.length l));
- let choices =
- List.map
- (fun (env, _, _) ->
- List.map
- (fun domain_item ->
- let description =
- fst (Environment.find domain_item env)
- in
- (descr_of_domain_item domain_item, description))
- term_dom)
- l
- in
- let choosed = C.interactive_interpretation_choice choices in
- List.map (List.nth l) choosed
-
- end
-
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