+++ /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://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
- (_,[]) -> []
- | (n,None::tl) -> None::(aux ((n+1),tl))
- | (n,_::tl) -> (Some (Cic.Rel n))::(aux ((n+1),tl))
- in
- aux (start,canonical_context)
-
-(* Returns the first meta whose number is above the *)
-(* number of the higher meta. *)
-let new_meta metasenv =
- 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)
- in
- 1 + aux (None,metasenv)
-
-let mk_implicit metasenv context =
- let newmeta = new_meta metasenv in
- let newuniv = CicUniv.fresh () in
- let irl = identity_relocation_list_for_metavariable 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 mk_implicit_type metasenv context =
- let newmeta = new_meta metasenv in
- let newuniv = CicUniv.fresh () in
- ([ newmeta, [], Cic.Sort (Cic.Type newuniv);
- (* TASSI: ?? *)
- newmeta + 1, context, Cic.Meta (newmeta, []) ] @metasenv,
- newmeta + 1)
-
-let mk_implicit_sort metasenv =
- let newmeta = new_meta metasenv in
- let newuniv = CicUniv.fresh () in
- ([ newmeta, [], Cic.Sort (Cic.Type newuniv)] @ metasenv, newmeta)
- (* TASSI: ?? *)
-
-let n_fresh_metas metasenv context n =
- if n = 0 then metasenv, []
- else
- let irl = identity_relocation_list_for_metavariable context in
- let newmeta = new_meta metasenv 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
- (* 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 irl = identity_relocation_list_for_metavariable context in
- let newmeta = new_meta metasenv in
- let newuniv = CicUniv.fresh () in
- let rec aux newmeta = function
- [] -> metasenv, []
- | uri::tl ->
- let metasenv', l = aux (newmeta + 3) tl in
- (* 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 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 (Some `Type) ->
- let (metasenv', idx) = mk_implicit_type metasenv context in
- let irl = identity_relocation_list_for_metavariable context in
- metasenv', Cic.Meta (idx, irl)
- | Cic.Implicit (Some `Closed) ->
- let (metasenv', idx) = mk_implicit metasenv [] in
- metasenv', Cic.Meta (idx, [])
- | Cic.Implicit None ->
- 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
- (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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