--- /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/
+ *)
+
+(* $Id: disambiguate.ml 9178 2008-11-12 12:09:52Z tassi $ *)
+
+open Printf
+
+open DisambiguateTypes
+open UriManager
+
+module Ast = CicNotationPt
+
+let debug_print _ = ();;
+
+let refine_term metasenv context uri term ugraph ~localization_tbl =
+(* if benchmark then incr actual_refinements; *)
+ assert (uri=None);
+ debug_print (lazy (sprintf "TEST_INTERPRETATION: %s" (CicPp.ppterm term)));
+ try
+ let term', _, metasenv',ugraph1 =
+ NCicRefine.type_of_aux' metasenv context term ugraph ~localization_tbl in
+ (Disambiguate.Ok (term', metasenv')),ugraph1
+ with
+ exn ->
+ let rec process_exn loc =
+ function
+ HExtlib.Localized (loc,exn) -> process_exn (Some loc) exn
+ | CicRefine.Uncertain msg ->
+ debug_print (lazy ("UNCERTAIN!!! [" ^ (Lazy.force msg) ^ "] " ^ CicPp.ppterm term)) ;
+ Disambiguate.Uncertain (loc,msg),ugraph
+ | CicRefine.RefineFailure msg ->
+ debug_print (lazy (sprintf "PRUNED!!!\nterm%s\nmessage:%s"
+ (CicPp.ppterm term) (Lazy.force msg)));
+ Disambiguate.Ko (loc,msg),ugraph
+ | exn -> raise exn
+ in
+ process_exn None exn
+
+let resolve (env: codomain_item Environment.t) (item: domain_item) ?(num = "") ?(args = []) () =
+ try
+ snd (Environment.find item env) env num args
+ with Not_found ->
+ failwith ("Domain item not found: " ^
+ (DisambiguateTypes.string_of_domain_item item))
+
+ (* TODO move it to Cic *)
+let find_in_context 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_term ?(create_dummy_ids=false) ~context ~env ~uri ~is_path ast
+ ~localization_tbl
+=
+ (* create_dummy_ids shouldbe used only for interpretating patterns *)
+ assert (uri = None);
+ let rec aux ~localize loc context = function
+ | CicNotationPt.AttributedTerm (`Loc loc, term) ->
+ let res = aux ~localize loc context term in
+ if localize then Cic.CicHash.add localization_tbl res loc;
+ res
+ | CicNotationPt.AttributedTerm (_, term) -> aux ~localize loc context term
+ | CicNotationPt.Appl (CicNotationPt.Symbol (symb, i) :: args) ->
+ let cic_args = List.map (aux ~localize loc context) args in
+ resolve env (Symbol (symb, i)) ~args:cic_args ()
+ | CicNotationPt.Appl terms ->
+ Cic.Appl (List.map (aux ~localize loc context) terms)
+ | CicNotationPt.Binder (binder_kind, (var, typ), body) ->
+ let cic_type = aux_option ~localize loc context (Some `Type) typ in
+ let cic_name = CicNotationUtil.cic_name_of_name var in
+ let cic_body = aux ~localize loc (cic_name :: context) body in
+ (match binder_kind with
+ | `Lambda -> Cic.Lambda (cic_name, cic_type, cic_body)
+ | `Pi
+ | `Forall -> Cic.Prod (cic_name, cic_type, cic_body)
+ | `Exists ->
+ resolve env (Symbol ("exists", 0))
+ ~args:[ cic_type; Cic.Lambda (cic_name, cic_type, cic_body) ] ())
+ | CicNotationPt.Case (term, indty_ident, outtype, branches) ->
+ let cic_term = aux ~localize loc context term in
+ let cic_outtype = aux_option ~localize loc context None outtype in
+ let do_branch ((head, _, args), term) =
+ let rec do_branch' context = function
+ | [] -> aux ~localize loc context term
+ | (name, typ) :: tl ->
+ let cic_name = CicNotationUtil.cic_name_of_name name in
+ let cic_body = do_branch' (cic_name :: context) tl in
+ let typ =
+ match typ with
+ | None -> Cic.Implicit (Some `Type)
+ | Some typ -> aux ~localize loc context typ
+ in
+ Cic.Lambda (cic_name, typ, cic_body)
+ in
+ do_branch' context args
+ in
+ let indtype_uri, indtype_no =
+ if create_dummy_ids then
+ (UriManager.uri_of_string "cic:/fake_indty.con", 0)
+ else
+ match indty_ident with
+ | Some (indty_ident, _) ->
+ (match resolve env (Id indty_ident) () with
+ | Cic.MutInd (uri, tyno, _) -> (uri, tyno)
+ | Cic.Implicit _ ->
+ raise (Disambiguate.Try_again (lazy "The type of the term to be matched
+ is still unknown"))
+ | _ ->
+ raise (DisambiguateTypes.Invalid_choice (Some loc, lazy "The type of the term to be matched is not (co)inductive!")))
+ | None ->
+ let rec fst_constructor =
+ function
+ (Ast.Pattern (head, _, _), _) :: _ -> head
+ | (Ast.Wildcard, _) :: tl -> fst_constructor tl
+ | [] -> raise (Invalid_choice (Some loc, lazy "The type of the term to be matched cannot be determined because it is an inductive type without constructors or because all patterns use wildcards"))
+ in
+ (match resolve env (Id (fst_constructor branches)) () with
+ | Cic.MutConstruct (indtype_uri, indtype_no, _, _) ->
+ (indtype_uri, indtype_no)
+ | Cic.Implicit _ ->
+ raise (Disambiguate.Try_again (lazy "The type of the term to be matched
+ is still unknown"))
+ | _ ->
+ raise (DisambiguateTypes.Invalid_choice (Some loc, lazy "The type of the term to be matched is not (co)inductive!")))
+ in
+ let branches =
+ if create_dummy_ids then
+ List.map
+ (function
+ Ast.Wildcard,term -> ("wildcard",None,[]), term
+ | Ast.Pattern _,_ ->
+ raise (DisambiguateTypes.Invalid_choice (Some loc, lazy "Syntax error: the left hand side of a branch patterns must be \"_\""))
+ ) branches
+ else
+ match fst(CicEnvironment.get_obj CicUniv.oblivion_ugraph indtype_uri) with
+ Cic.InductiveDefinition (il,_,leftsno,_) ->
+ let _,_,_,cl =
+ try
+ List.nth il indtype_no
+ with _ -> assert false
+ in
+ let rec count_prod t =
+ match CicReduction.whd [] t with
+ Cic.Prod (_, _, t) -> 1 + (count_prod t)
+ | _ -> 0
+ in
+ let rec sort branches cl =
+ match cl with
+ [] ->
+ let rec analyze unused unrecognized useless =
+ function
+ [] ->
+ if unrecognized != [] then
+ raise (DisambiguateTypes.Invalid_choice
+ (Some loc,
+ lazy
+ ("Unrecognized constructors: " ^
+ String.concat " " unrecognized)))
+ else if useless > 0 then
+ raise (DisambiguateTypes.Invalid_choice
+ (Some loc,
+ lazy
+ ("The last " ^ string_of_int useless ^
+ "case" ^ if useless > 1 then "s are" else " is" ^
+ " unused")))
+ else
+ []
+ | (Ast.Wildcard,_)::tl when not unused ->
+ analyze true unrecognized useless tl
+ | (Ast.Pattern (head,_,_),_)::tl when not unused ->
+ analyze unused (head::unrecognized) useless tl
+ | _::tl -> analyze unused unrecognized (useless + 1) tl
+ in
+ analyze false [] 0 branches
+ | (name,ty)::cltl ->
+ let rec find_and_remove =
+ function
+ [] ->
+ raise
+ (DisambiguateTypes.Invalid_choice
+ (Some loc, lazy ("Missing case: " ^ name)))
+ | ((Ast.Wildcard, _) as branch :: _) as branches ->
+ branch, branches
+ | (Ast.Pattern (name',_,_),_) as branch :: tl
+ when name = name' ->
+ branch,tl
+ | branch::tl ->
+ let found,rest = find_and_remove tl in
+ found, branch::rest
+ in
+ let branch,tl = find_and_remove branches in
+ match branch with
+ Ast.Pattern (name,y,args),term ->
+ if List.length args = count_prod ty - leftsno then
+ ((name,y,args),term)::sort tl cltl
+ else
+ raise
+ (DisambiguateTypes.Invalid_choice
+ (Some loc,
+ lazy ("Wrong number of arguments for " ^ name)))
+ | Ast.Wildcard,term ->
+ let rec mk_lambdas =
+ function
+ 0 -> term
+ | n ->
+ CicNotationPt.Binder
+ (`Lambda, (CicNotationPt.Ident ("_", None), None),
+ mk_lambdas (n - 1))
+ in
+ (("wildcard",None,[]),
+ mk_lambdas (count_prod ty - leftsno)) :: sort tl cltl
+ in
+ sort branches cl
+ | _ -> assert false
+ in
+ Cic.MutCase (indtype_uri, indtype_no, cic_outtype, cic_term,
+ (List.map do_branch branches))
+ | CicNotationPt.Cast (t1, t2) ->
+ let cic_t1 = aux ~localize loc context t1 in
+ let cic_t2 = aux ~localize loc context t2 in
+ Cic.Cast (cic_t1, cic_t2)
+ | CicNotationPt.LetIn ((name, typ), def, body) ->
+ let cic_def = aux ~localize loc context def in
+ let cic_name = CicNotationUtil.cic_name_of_name name in
+ let cic_typ =
+ match typ with
+ | None -> Cic.Implicit (Some `Type)
+ | Some t -> aux ~localize loc context t
+ in
+ let cic_body = aux ~localize loc (cic_name :: context) body in
+ Cic.LetIn (cic_name, cic_def, cic_typ, cic_body)
+ | CicNotationPt.LetRec (kind, defs, body) ->
+ let context' =
+ List.fold_left
+ (fun acc (_, (name, _), _, _) ->
+ CicNotationUtil.cic_name_of_name name :: acc)
+ context defs
+ in
+ let cic_body =
+ let unlocalized_body = aux ~localize:false loc context' body in
+ match unlocalized_body with
+ Cic.Rel n when n <= List.length defs -> `AvoidLetInNoAppl n
+ | Cic.Appl (Cic.Rel n::l) when n <= List.length defs ->
+ (try
+ let l' =
+ List.map
+ (function t ->
+ let t',subst,metasenv =
+ CicMetaSubst.delift_rels [] [] (List.length defs) t
+ in
+ assert (subst=[]);
+ assert (metasenv=[]);
+ t') l
+ in
+ (* We can avoid the LetIn. But maybe we need to recompute l'
+ so that it is localized *)
+ if localize then
+ match body with
+ CicNotationPt.AttributedTerm (_,CicNotationPt.Appl(_::l)) ->
+ (* since we avoid the letin, the context has no
+ * recfuns in it *)
+ let l' = List.map (aux ~localize loc context) l in
+ `AvoidLetIn (n,l')
+ | _ -> assert false
+ else
+ `AvoidLetIn (n,l')
+ with
+ CicMetaSubst.DeliftingARelWouldCaptureAFreeVariable ->
+ if localize then
+ `AddLetIn (aux ~localize loc context' body)
+ else
+ `AddLetIn unlocalized_body)
+ | _ ->
+ if localize then
+ `AddLetIn (aux ~localize loc context' body)
+ else
+ `AddLetIn unlocalized_body
+ in
+ let inductiveFuns =
+ List.map
+ (fun (params, (name, typ), body, decr_idx) ->
+ let add_binders kind t =
+ List.fold_right
+ (fun var t -> CicNotationPt.Binder (kind, var, t)) params t
+ in
+ let cic_body =
+ aux ~localize loc context' (add_binders `Lambda body) in
+ let cic_type =
+ aux_option ~localize loc context (Some `Type)
+ (HExtlib.map_option (add_binders `Pi) typ) in
+ let name =
+ match CicNotationUtil.cic_name_of_name name with
+ | Cic.Anonymous ->
+ CicNotationPt.fail loc
+ "Recursive functions cannot be anonymous"
+ | Cic.Name name -> name
+ in
+ (name, decr_idx, cic_type, cic_body))
+ defs
+ in
+ let fix_or_cofix n =
+ match kind with
+ `Inductive -> Cic.Fix (n,inductiveFuns)
+ | `CoInductive ->
+ let coinductiveFuns =
+ List.map
+ (fun (name, _, typ, body) -> name, typ, body)
+ inductiveFuns
+ in
+ Cic.CoFix (n,coinductiveFuns)
+ in
+ let counter = ref ~-1 in
+ let build_term funs (var,_,ty,_) t =
+ incr counter;
+ Cic.LetIn (Cic.Name var, fix_or_cofix !counter, ty, t)
+ in
+ (match cic_body with
+ `AvoidLetInNoAppl n ->
+ let n' = List.length inductiveFuns - n in
+ fix_or_cofix n'
+ | `AvoidLetIn (n,l) ->
+ let n' = List.length inductiveFuns - n in
+ Cic.Appl (fix_or_cofix n'::l)
+ | `AddLetIn cic_body ->
+ List.fold_right (build_term inductiveFuns) inductiveFuns
+ cic_body)
+ | CicNotationPt.Ident _
+ | CicNotationPt.Uri _ when is_path -> raise Disambiguate.PathNotWellFormed
+ | CicNotationPt.Ident (name, subst)
+ | CicNotationPt.Uri (name, subst) as ast ->
+ let is_uri = function CicNotationPt.Uri _ -> true | _ -> false in
+ (try
+ if is_uri ast then raise Not_found;(* don't search the env for URIs *)
+ let index = find_in_context name context in
+ if subst <> None then
+ CicNotationPt.fail loc "Explicit substitutions not allowed here";
+ Cic.Rel index
+ with Not_found ->
+ let cic =
+ if is_uri ast then (* we have the URI, build the term out of it *)
+ try
+ CicUtil.term_of_uri (UriManager.uri_of_string name)
+ with UriManager.IllFormedUri _ ->
+ CicNotationPt.fail loc "Ill formed URI"
+ else
+ 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 ~localize loc context term
+ with Not_found ->
+ raise (Invalid_choice (Some loc, lazy "The provided explicit named substitution is trying to instantiate a named variable the object is not abstracted on"))))
+ subst
+ | None -> List.map (fun uri -> uri, Cic.Implicit None) uris)
+ in
+ (try
+ match cic with
+ | Cic.Const (uri, []) ->
+ let o,_ = CicEnvironment.get_obj CicUniv.oblivion_ugraph uri in
+ let uris = CicUtil.params_of_obj o in
+ Cic.Const (uri, mk_subst uris)
+ | Cic.Var (uri, []) ->
+ let o,_ = CicEnvironment.get_obj CicUniv.oblivion_ugraph uri in
+ let uris = CicUtil.params_of_obj o in
+ Cic.Var (uri, mk_subst uris)
+ | Cic.MutInd (uri, i, []) ->
+ (try
+ let o,_ = CicEnvironment.get_obj CicUniv.oblivion_ugraph uri in
+ let uris = CicUtil.params_of_obj o in
+ Cic.MutInd (uri, i, mk_subst uris)
+ with
+ CicEnvironment.Object_not_found _ ->
+ (* if we are here it is probably the case that during the
+ definition of a mutual inductive type we have met an
+ occurrence of the type in one of its constructors.
+ However, the inductive type is not yet in the environment
+ *)
+ (*here the explicit_named_substituion is assumed to be of length 0 *)
+ Cic.MutInd (uri,i,[]))
+ | Cic.MutConstruct (uri, i, j, []) ->
+ let o,_ = CicEnvironment.get_obj CicUniv.oblivion_ugraph uri in
+ let uris = CicUtil.params_of_obj o in
+ Cic.MutConstruct (uri, i, j, mk_subst uris)
+ | Cic.Meta _ | Cic.Implicit _ as t ->
+(*
+ debug_print (lazy (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 ^ " := " ^ CicNotationPtPp.pp_term term)
+ subst))));
+*)
+ t
+ | _ ->
+ raise (Invalid_choice (Some loc, lazy "??? Can this happen?"))
+ with
+ CicEnvironment.CircularDependency _ ->
+ raise (Invalid_choice (None, lazy "Circular dependency in the environment"))))
+ | CicNotationPt.Implicit -> Cic.Implicit None
+ | CicNotationPt.UserInput -> Cic.Implicit (Some `Hole)
+ | CicNotationPt.Num (num, i) -> resolve env (Num i) ~num ()
+ | CicNotationPt.Meta (index, subst) ->
+ let cic_subst =
+ List.map
+ (function
+ None -> None
+ | Some term -> Some (aux ~localize loc context term))
+ subst
+ in
+ Cic.Meta (index, cic_subst)
+ | CicNotationPt.Sort `Prop -> Cic.Sort Cic.Prop
+ | CicNotationPt.Sort `Set -> Cic.Sort Cic.Set
+ | CicNotationPt.Sort (`Type u) -> Cic.Sort (Cic.Type u)
+ | CicNotationPt.Sort (`CProp u) -> Cic.Sort (Cic.CProp u)
+ | CicNotationPt.Symbol (symbol, instance) ->
+ resolve env (Symbol (symbol, instance)) ()
+ | _ -> assert false (* god bless Bologna *)
+ and aux_option ~localize loc context annotation = function
+ | None -> Cic.Implicit annotation
+ | Some term -> aux ~localize loc context term
+ in
+ aux ~localize:true HExtlib.dummy_floc context ast
+
+let interpretate_term ?(create_dummy_ids=false) ~context ~env ~uri ~is_path ast
+ ~localization_tbl
+=
+ assert false
+(*
+ let context = List.map (function None -> Cic.Anonymous | Some (n,_) -> n) context in
+ interpretate_term ~create_dummy_ids ~context ~env ~uri ~is_path ast
+~localization_tbl
+*)
+;;
+
+let domain_of_term ~context =
+ let context = List.map (fun x -> Cic.Name (fst x)) context in
+ Disambiguate.domain_of_ast_term ~context
+;;
+
+module Make (C : DisambiguateTypes.Callbacks) = struct
+ module Disambiguator = Disambiguate.Make(C)
+
+ let disambiguate_term ?(fresh_instances=false) ~dbd ~context ~metasenv
+ ?(initial_ugraph = CicUniv.oblivion_ugraph) ~aliases ~universe
+ (text,prefix_len,term) =
+ let term =
+ if fresh_instances then CicNotationUtil.freshen_term term else term
+ in
+ let localization_tbl = Cic.CicHash.create 503 in
+ Disambiguator.disambiguate_thing
+ ~dbd ~context ~metasenv ~initial_ugraph ~aliases
+ ~universe ~uri:None ~pp_thing:CicNotationPp.pp_term
+ ~domain_of_thing:domain_of_term
+ ~interpretate_thing:(interpretate_term (?create_dummy_ids:None))
+ ~refine_thing:refine_term (text,prefix_len,term)
+ ~localization_tbl
+ ;;
+
+end
projects / helm.git / commitdiff