+++ /dev/null
-(* Copyright (C) 2002, 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/.
- *)
-
-(* $Id$ *)
-
-open ProofEngineTypes
-
-let clearbody ~hyp =
- let clearbody ~hyp (proof, goal) =
- let module C = Cic in
- let curi,metasenv,pbo,pty = proof in
- let metano,_,_ = CicUtil.lookup_meta goal metasenv in
- let string_of_name =
- function
- C.Name n -> n
- | C.Anonymous -> "_"
- in
- let metasenv' =
- List.map
- (function
- (m,canonical_context,ty) when m = metano ->
- let canonical_context' =
- List.fold_right
- (fun entry context ->
- match entry with
- Some (C.Name hyp',C.Def (term,ty)) when hyp = hyp' ->
- let cleared_entry =
- let ty =
- match ty with
- Some ty -> ty
- | None ->
- fst
- (CicTypeChecker.type_of_aux' metasenv context term
- CicUniv.empty_ugraph) (* TASSI: FIXME *)
- in
- Some (C.Name hyp, Cic.Decl ty)
- in
- cleared_entry::context
- | None -> None::context
- | Some (n,C.Decl t)
- | Some (n,C.Def (t,None)) ->
- let _,_ =
- try
- CicTypeChecker.type_of_aux' metasenv context t
- CicUniv.empty_ugraph (* TASSI: FIXME *)
- with
- _ ->
- raise
- (Fail
- (lazy ("The correctness of hypothesis " ^
- string_of_name n ^
- " relies on the body of " ^ hyp)
- ))
- in
- entry::context
- | Some (_,Cic.Def (_,Some _)) -> assert false
- ) canonical_context []
- in
- let _,_ =
- try
- CicTypeChecker.type_of_aux' metasenv canonical_context' ty
- CicUniv.empty_ugraph (* TASSI: FIXME *)
- with
- _ ->
- raise
- (Fail
- (lazy ("The correctness of the goal relies on the body of " ^
- hyp)))
- in
- m,canonical_context',ty
- | t -> t
- ) metasenv
- in
- (curi,metasenv',pbo,pty), [goal]
- in
- mk_tactic (clearbody ~hyp)
-
-let clear ~hyp =
- let clear ~hyp (proof, goal) =
- let module C = Cic in
- let curi,metasenv,pbo,pty = proof in
- let metano,context,ty =
- CicUtil.lookup_meta goal metasenv
- in
- let string_of_name =
- function
- C.Name n -> n
- | C.Anonymous -> "_"
- in
- let metasenv' =
- List.map
- (function
- (m,canonical_context,ty) when m = metano ->
- let context_changed, canonical_context' =
- List.fold_right
- (fun entry (b, context) ->
- match entry with
- Some (Cic.Name hyp',_) when hyp' = hyp ->
- (true, None::context)
- | None -> (b, None::context)
- | Some (n,C.Decl t)
- | Some (n,Cic.Def (t,Some _))
- | Some (n,C.Def (t,None)) ->
- if b then
- let _,_ =
- try
- CicTypeChecker.type_of_aux' metasenv context t
- CicUniv.empty_ugraph
- with _ ->
- raise
- (Fail
- (lazy ("Hypothesis " ^ string_of_name n ^
- " uses hypothesis " ^ hyp)))
- in
- (b, entry::context)
- else
- (b, entry::context)
- ) canonical_context (false, [])
- in
- if not context_changed then
- raise (Fail (lazy ("Hypothesis " ^ hyp ^ " does not exist")));
- let _,_ =
- try
- CicTypeChecker.type_of_aux' metasenv canonical_context' ty
- CicUniv.empty_ugraph
- with _ ->
- raise (Fail (lazy ("Hypothesis " ^ hyp ^ " occurs in the goal")))
- in
- m,canonical_context',ty
- | t -> t
- ) metasenv
- in
- (curi,metasenv',pbo,pty), [goal]
- in
- mk_tactic (clear ~hyp)
-
-(* Warning: this tactic has no effect on the proof term.
- It just changes the name of an hypothesis in the current sequent *)
-let rename ~from ~to_ =
- let rename ~from ~to_ (proof, goal) =
- let module C = Cic in
- let curi,metasenv,pbo,pty = proof in
- let metano,context,ty =
- CicUtil.lookup_meta goal metasenv
- in
- let metasenv' =
- List.map
- (function
- (m,canonical_context,ty) when m = metano ->
- let canonical_context' =
- List.map
- (function
- Some (Cic.Name hyp,decl_or_def) when hyp = from ->
- Some (Cic.Name to_,decl_or_def)
- | item -> item
- ) canonical_context
- in
- m,canonical_context',ty
- | t -> t
- ) metasenv
- in
- (curi,metasenv',pbo,pty), [goal]
- in
- mk_tactic (rename ~from ~to_)
-
-let set_goal n =
- ProofEngineTypes.mk_tactic
- (fun (proof, goal) ->
- let (_, metasenv, _, _) = proof in
- if CicUtil.exists_meta n metasenv then
- (proof, [n])
- else
- raise (ProofEngineTypes.Fail (lazy ("no such meta: " ^ string_of_int n))))
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