+++ /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/.
- *)
-
-open ProofEngineTypes
-
-let clearbody ~hyp (proof, goal) =
- let module C = Cic in
- match hyp with
- None -> assert false
- | Some (_, C.Def (_, Some _)) -> assert false
- | Some (_, C.Decl _) -> raise (Fail "No Body To Clear")
- | Some (n_to_clear_body, C.Def (term,None)) as hyp_to_clear_body ->
- 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
- t when t == hyp_to_clear_body ->
- let cleared_entry =
- let ty =
- CicTypeChecker.type_of_aux' metasenv context term
- in
- Some (n_to_clear_body, 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
- with
- _ ->
- raise
- (Fail
- ("The correctness of hypothesis " ^
- string_of_name n ^
- " relies on the body of " ^
- string_of_name n_to_clear_body)
- )
- in
- entry::context
- | Some (_,Cic.Def (_,Some _)) -> assert false
- ) canonical_context []
- in
- let _ =
- try
- CicTypeChecker.type_of_aux' metasenv canonical_context' ty
- with
- _ ->
- raise
- (Fail
- ("The correctness of the goal relies on the body of " ^
- string_of_name n_to_clear_body))
- in
- m,canonical_context',ty
- | t -> t
- ) metasenv
- in
- (curi,metasenv',pbo,pty), [goal]
-
-let clear ~hyp:hyp_to_clear (proof, goal) =
- let module C = Cic in
- match hyp_to_clear with
- None -> assert false
- | Some (n_to_clear, _) ->
- 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 canonical_context' =
- List.fold_right
- (fun entry context ->
- match entry with
- t when t == hyp_to_clear -> None::context
- | None -> None::context
- | Some (_,Cic.Def (_,Some _)) -> assert false
- | Some (n,C.Decl t)
- | Some (n,C.Def (t,None)) ->
- let _ =
- try
- CicTypeChecker.type_of_aux' metasenv context t
- with
- _ ->
- raise
- (Fail
- ("Hypothesis " ^
- string_of_name n ^
- " uses hypothesis " ^
- string_of_name n_to_clear)
- )
- in
- entry::context
- ) canonical_context []
- in
- let _ =
- try
- CicTypeChecker.type_of_aux' metasenv canonical_context' ty
- with
- _ ->
- raise
- (Fail
- ("Hypothesis " ^ string_of_name n_to_clear ^
- " occurs in the goal"))
- in
- m,canonical_context',ty
- | t -> t
- ) metasenv
- in
- (curi,metasenv',pbo,pty), [goal]
-