- let _,metasenv,_,_ = proof in
- let _,context,_ = CicUtil.lookup_meta goal metasenv in
- let wty,u = (* TASSI: FIXME *)
- CicTypeChecker.type_of_aux' metasenv context what CicUniv.empty_ugraph in
- let wwty,_ = CicTypeChecker.type_of_aux' metasenv context with_what u in
- try
- if (wty = wwty) then
- ProofEngineTypes.apply_tactic
- (T.thens
- ~start:(
- P.cut_tac
- (C.Appl [
- (C.MutInd (HelmLibraryObjects.Logic.eq_URI, 0, [])) ;
- wty ;
- what ;
- with_what]))
- ~continuations:[
-
- T.then_ ~start:(rewrite_simpl_tac ~term:(C.Rel 1) ())
- ~continuation:(
- ProofEngineStructuralRules.clear
- ~hyp:(List.hd context)) ;
- T.id_tac])
- status
- else raise (ProofEngineTypes.Fail "Replace: terms not replaceable")
- with (Failure "hd") ->
- raise (ProofEngineTypes.Fail "Replace: empty context")
+ let uri,metasenv,pbo,pty = proof in
+ let (_,context,ty) as conjecture = CicUtil.lookup_meta goal metasenv in
+ assert (hyps_pat = []); (*CSC: not implemented yet *)
+ let context_len = List.length context in
+ let subst,metasenv,u,_,selected_terms_with_context =
+ ProofEngineHelpers.select ~metasenv ~ugraph:CicUniv.empty_ugraph
+ ~conjecture ~pattern in
+ let metasenv = CicMetaSubst.apply_subst_metasenv subst metasenv in
+ let with_what, metasenv, u = with_what context metasenv u in
+ let with_what = CicMetaSubst.apply_subst subst with_what in
+ let pbo = CicMetaSubst.apply_subst subst pbo in
+ let pty = CicMetaSubst.apply_subst subst pty in
+ let status = (uri,metasenv,pbo,pty),goal in
+ let ty_of_with_what,u =
+ CicTypeChecker.type_of_aux'
+ metasenv context with_what CicUniv.empty_ugraph in
+ let whats =
+ match selected_terms_with_context with
+ [] -> raise (ProofEngineTypes.Fail "Replace: no term selected")
+ | l ->
+ List.map
+ (fun (context_of_t,t) ->
+ let t_in_context =
+ try
+ let context_of_t_len = List.length context_of_t in
+ if context_of_t_len = context_len then t
+ else
+ (let t_in_context,subst,metasenv' =
+ CicMetaSubst.delift_rels [] metasenv
+ (context_of_t_len - context_len) t
+ in
+ assert (subst = []);
+ assert (metasenv = metasenv');
+ t_in_context)
+ with
+ CicMetaSubst.DeliftingARelWouldCaptureAFreeVariable ->
+ (*CSC: we could implement something stronger by completely changing
+ the semantics of the tactic *)
+ raise (ProofEngineTypes.Fail
+ "Replace: one of the selected terms is not closed") in
+ let ty_of_t_in_context,u = (* TASSI: FIXME *)
+ CicTypeChecker.type_of_aux' metasenv context t_in_context
+ CicUniv.empty_ugraph in
+ let b,u = CicReduction.are_convertible ~metasenv context
+ ty_of_with_what ty_of_t_in_context u in
+ if b then
+ let concl_pat_for_t = ProofEngineHelpers.pattern_of ~term:ty [t] in
+ let pattern_for_t = None,[],concl_pat_for_t in
+ t_in_context,pattern_for_t
+ else
+ raise
+ (ProofEngineTypes.Fail
+ "Replace: one of the selected terms and the term to be replaced with have not convertible types")
+ ) l in
+ let rec aux n whats status =
+ match whats with
+ [] -> ProofEngineTypes.apply_tactic T.id_tac status
+ | (what,pattern)::tl ->
+ let what = CicSubstitution.lift n what in
+ let with_what = CicSubstitution.lift n with_what in
+ let ty_of_with_what = CicSubstitution.lift n ty_of_with_what in
+ ProofEngineTypes.apply_tactic
+ (T.thens
+ ~start:(
+ P.cut_tac
+ (C.Appl [
+ (C.MutInd (LibraryObjects.eq_URI (), 0, [])) ;
+ ty_of_with_what ;
+ what ;
+ with_what]))
+ ~continuations:[
+ T.then_
+ ~start:(
+ rewrite_tac ~direction:`LeftToRight ~pattern (C.Rel 1))
+ ~continuation:(
+ T.then_
+ ~start:(
+ ProofEngineTypes.mk_tactic
+ (function ((proof,goal) as status) ->
+ let _,metasenv,_,_ = proof in
+ let _,context,_ = CicUtil.lookup_meta goal metasenv in
+ let hyp =
+ try
+ match List.hd context with
+ Some (Cic.Name name,_) -> name
+ | _ -> assert false
+ with (Failure "hd") -> assert false
+ in
+ ProofEngineTypes.apply_tactic
+ (ProofEngineStructuralRules.clear ~hyp) status))
+ ~continuation:(aux_tac (n + 1) tl));
+ T.id_tac])
+ status
+ and aux_tac n tl = ProofEngineTypes.mk_tactic (aux n tl) in
+ aux 0 whats status