+(* 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://cs.unibo.it/helm/.
+ *)
(* identity_relocation_list_for_metavariable i canonical_context *)
(* returns the identity relocation list, which is the list [1 ; ... ; n] *)
(* where n = List.length [canonical_context] *)
(*CSC: ma mi basta la lunghezza del contesto canonico!!!*)
let identity_relocation_list_for_metavariable ?(start = 1) canonical_context =
- let canonical_context_length = List.length canonical_context in
let rec aux =
function
(_,[]) -> []
(* Returns the first meta whose number is above the *)
(* number of the higher meta. *)
-let new_meta metasenv =
+let new_meta metasenv subst =
let rec aux =
function
- None,[] -> 1
- | Some n,[] -> n
- | None,(n,_,_)::tl -> aux (Some n,tl)
- | Some m,(n,_,_)::tl -> if n > m then aux (Some n,tl) else aux (Some m,tl)
+ None, [] -> 1
+ | Some n, [] -> n
+ | None, n::tl -> aux (Some n,tl)
+ | Some m, n::tl -> if n > m then aux (Some n,tl) else aux (Some m,tl)
in
- 1 + aux (None,metasenv)
+ let indexes =
+ (List.map (fun (i, _, _) -> i) metasenv) @ (List.map fst subst)
+ in
+ 1 + aux (None, indexes)
+
+(* let apply_subst_context = CicMetaSubst.apply_subst_context;; *)
+(* questa o la precedente sembrano essere equivalenti come tempi *)
+let apply_subst_context _ context = context ;;
-let mk_implicit metasenv context =
- let newmeta = new_meta metasenv in
+let mk_implicit metasenv subst context =
+ let newmeta = new_meta metasenv subst in
+ let newuniv = CicUniv.fresh () in
let irl = identity_relocation_list_for_metavariable context in
- ([ newmeta, context, Cic.Sort Cic.Type ;
- newmeta + 1, context, Cic.Meta (newmeta, irl);
+ (* in the following mk_* functions we apply substitution to canonical
+ * context since we have the invariant that the metasenv has already been
+ * instantiated with subst *)
+ let context = apply_subst_context subst context in
+ ([ newmeta, [], Cic.Sort (Cic.Type newuniv) ;
+ (* TASSI: ?? *)
+ newmeta + 1, context, Cic.Meta (newmeta, []);
newmeta + 2, context, Cic.Meta (newmeta + 1,irl) ] @ metasenv,
newmeta + 2)
-let n_fresh_metas metasenv context n =
+let mk_implicit_type metasenv subst context =
+ let newmeta = new_meta metasenv subst in
+ let newuniv = CicUniv.fresh () in
+ let context = apply_subst_context subst context in
+ ([ newmeta, [], Cic.Sort (Cic.Type newuniv);
+ (* TASSI: ?? *)
+ newmeta + 1, context, Cic.Meta (newmeta, []) ] @metasenv,
+ newmeta + 1)
+
+let mk_implicit_sort metasenv subst =
+ let newmeta = new_meta metasenv subst in
+ let newuniv = CicUniv.fresh () in
+ ([ newmeta, [], Cic.Sort (Cic.Type newuniv)] @ metasenv, newmeta)
+ (* TASSI: ?? *)
+
+let n_fresh_metas metasenv subst context n =
if n = 0 then metasenv, []
else
let irl = identity_relocation_list_for_metavariable context in
- let newmeta = new_meta metasenv in
+ let context = apply_subst_context subst context in
+ let newmeta = new_meta metasenv subst in
+ let newuniv = CicUniv.fresh () in
let rec aux newmeta n =
if n = 0 then metasenv, []
else
let metasenv', l = aux (newmeta + 3) (n-1) in
- (newmeta, context, Cic.Sort Cic.Type)::
+ (* TASSI: ?? *)
+ (newmeta, context, Cic.Sort (Cic.Type newuniv))::
(newmeta + 1, context, Cic.Meta (newmeta, irl))::
(newmeta + 2, context, Cic.Meta (newmeta + 1,irl))::metasenv',
Cic.Meta(newmeta+2,irl)::l in
aux newmeta n
-let fresh_subst metasenv context uris =
+let fresh_subst metasenv subst context uris =
let irl = identity_relocation_list_for_metavariable context in
- let newmeta = new_meta metasenv in
+ let context = apply_subst_context subst context in
+ let newmeta = new_meta metasenv subst in
+ let newuniv = CicUniv.fresh () in
let rec aux newmeta = function
[] -> metasenv, []
| uri::tl ->
let metasenv', l = aux (newmeta + 3) tl in
- (newmeta, context, Cic.Sort Cic.Type)::
+ (* TASSI: ?? *)
+ (newmeta, context, Cic.Sort (Cic.Type newuniv))::
(newmeta + 1, context, Cic.Meta (newmeta, irl))::
(newmeta + 2, context, Cic.Meta (newmeta + 1,irl))::metasenv',
(uri,Cic.Meta(newmeta+2,irl))::l in
aux newmeta uris
-let mk_implicit_type metasenv context =
- let newmeta = new_meta metasenv in
- let irl = identity_relocation_list_for_metavariable context in
- ([ newmeta, context, Cic.Sort Cic.Type ;
- newmeta + 1, context, Cic.Meta (newmeta, irl) ] @metasenv,
- newmeta + 1)
-
-let expand_implicits metasenv context term =
- let rec aux metasenv context = function
- | (Cic.Rel _) as t -> metasenv, t
- | (Cic.Sort _) as t -> metasenv, t
- | Cic.Const (uri, subst) ->
- let metasenv', subst' = do_subst metasenv context subst in
- metasenv', Cic.Const (uri, subst')
- | Cic.Var (uri, subst) ->
- let metasenv', subst' = do_subst metasenv context subst in
- metasenv', Cic.Var (uri, subst')
- | Cic.MutInd (uri, i, subst) ->
- let metasenv', subst' = do_subst metasenv context subst in
- metasenv', Cic.MutInd (uri, i, subst')
- | Cic.MutConstruct (uri, i, j, subst) ->
- let metasenv', subst' = do_subst metasenv context subst in
- metasenv', Cic.MutConstruct (uri, i, j, subst')
- | Cic.Meta (n,l) ->
- let metasenv', l' = do_local_context metasenv context l in
- metasenv', Cic.Meta (n, l')
- | Cic.Implicit ->
- let (metasenv', idx) = mk_implicit metasenv context in
- let irl = identity_relocation_list_for_metavariable context in
- metasenv', Cic.Meta (idx, irl)
- | Cic.Cast (te, ty) ->
- let metasenv', ty' = aux metasenv context ty in
- let metasenv'', te' = aux metasenv' context te in
- metasenv'', Cic.Cast (te', ty')
- | Cic.Prod (name, s, t) ->
- let metasenv', s' = aux metasenv context s in
- let metasenv'', t' =
- aux metasenv' (Some (name, Cic.Decl s') :: context) t
- in
- metasenv'', Cic.Prod (name, s', t')
- | Cic.Lambda (name, s, t) ->
- let metasenv', s' = aux metasenv context s in
- let metasenv'', t' =
- aux metasenv' (Some (name, Cic.Decl s') :: context) t
- in
- metasenv'', Cic.Lambda (name, s', t')
- | Cic.LetIn (name, s, t) ->
- let metasenv', s' = aux metasenv context s in
- let metasenv'', t' =
- aux metasenv' (Some (name, Cic.Def (s', None)) :: context) t
- in
- metasenv'', Cic.LetIn (name, s', t')
- | Cic.Appl l when List.length l > 1 ->
- let metasenv', l' =
- List.fold_right
- (fun term (metasenv, terms) ->
- let new_metasenv, term = aux metasenv context term in
- new_metasenv, term :: terms)
- l (metasenv, [])
- in
- metasenv', Cic.Appl l'
- | Cic.Appl _ -> assert false
- | Cic.MutCase (uri, i, outtype, term, patterns) ->
- let metasenv', l' =
- List.fold_right
- (fun term (metasenv, terms) ->
- let new_metasenv, term = aux metasenv context term in
- new_metasenv, term :: terms)
- (outtype :: term :: patterns) (metasenv, [])
- in
- let outtype', term', patterns' =
- match l' with
- | outtype' :: term' :: patterns' -> outtype', term', patterns'
- | _ -> assert false
- in
- metasenv', Cic.MutCase (uri, i, outtype', term', patterns')
- | Cic.Fix (i, funs) ->
- let metasenv', types =
- List.fold_right
- (fun (name, _, typ, _) (metasenv, types) ->
- let new_metasenv, new_type = aux metasenv context typ in
-prerr_endline ("UH? " ^ CicPp.ppterm typ ^ " ==> " ^ CicPp.ppterm new_type) ;
- (new_metasenv, (name, new_type) :: types))
- funs (metasenv, [])
- in
- let context' =
- (List.rev_map
- (fun (name, t) -> Some (Cic.Name name, Cic.Decl t))
- types)
- @ context
- in
- let metasenv'', bodies =
- List.fold_right
- (fun (_, _, _, body) (metasenv, bodies) ->
- let new_metasenv, new_body = aux metasenv context' body in
- (new_metasenv, new_body :: bodies))
- funs (metasenv', [])
- in
- let rec combine = function
- | ((name, index, _, _) :: funs_tl),
- ((_, typ) :: typ_tl),
- (body :: body_tl) ->
- (name, index, typ, body) :: combine (funs_tl, typ_tl, body_tl)
- | [], [], [] -> []
- | _ -> assert false
- in
- let funs' = combine (funs, types, bodies) in
- metasenv'', Cic.Fix (i, funs')
- | Cic.CoFix (i, funs) ->
- let metasenv', types =
- List.fold_right
- (fun (name, typ, _) (metasenv, types) ->
- let new_metasenv, new_type = aux metasenv context typ in
- (new_metasenv, (name, new_type) :: types))
- funs (metasenv, [])
- in
- let context' =
- (List.rev_map
- (fun (name, t) -> Some (Cic.Name name, Cic.Decl t))
- types)
- @ context
- in
- let metasenv'', bodies =
- List.fold_right
- (fun (_, _, body) (metasenv, bodies) ->
- let new_metasenv, new_body = aux metasenv context' body in
- (new_metasenv, new_body :: bodies))
- funs (metasenv', [])
- in
- let rec combine = function
- | ((name, _, _) :: funs_tl),
- ((_, typ) :: typ_tl),
- (body :: body_tl) ->
- (name, typ, body) :: combine (funs_tl, typ_tl, body_tl)
- | [], [], [] -> []
- | _ -> assert false
- in
- let funs' = combine (funs, types, bodies) in
- metasenv'', Cic.CoFix (i, funs')
- and do_subst metasenv context subst =
- List.fold_right
- (fun (uri, term) (metasenv, substs) ->
- let metasenv', term' = aux metasenv context term in
- (metasenv', (uri, term') :: substs))
- subst (metasenv, [])
- and do_local_context metasenv context local_context =
- List.fold_right
- (fun term (metasenv, local_context) ->
- let metasenv', term' =
- match term with
- | None -> metasenv, None
- | Some term ->
- let metasenv', term' = aux metasenv context term in
- metasenv', Some term'
- in
- metasenv', term' :: local_context)
- local_context (metasenv, [])
- in
- aux metasenv context term
-
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