{ status with proof_status = No_proof }
let generate_elimination_principles uri status =
- let elim sort status =
- try
- let uri,obj = CicElim.elim_of ~sort uri 0 in
- MatitaSync.add_obj uri obj status
- with CicElim.Can_t_eliminate -> status
- in
- List.fold_left (fun status sort -> elim sort status) status
- [ Cic.Prop; Cic.Set; (Cic.Type (CicUniv.fresh ())) ]
+ let status' = ref status in
+ let elim sort =
+ try
+ let uri,obj = CicElim.elim_of ~sort uri 0 in
+ status' := MatitaSync.add_obj uri obj !status'
+ with CicElim.Can_t_eliminate -> ()
+ in
+ try
+ List.iter elim [ Cic.Prop; Cic.Set; (Cic.Type (CicUniv.fresh ())) ];
+ !status'
+ with exn ->
+ MatitaSync.time_travel ~present:!status' ~past:status;
+ raise exn
let generate_projections uri fields status =
let projections = CicRecord.projections_of uri fields in
command_error (
"metasenv not empty while giving a definition with body: " ^
CicMetaSubst.ppmetasenv [] metasenv);
- let status = MatitaSync.add_obj uri obj status in
- match obj with
- Cic.Constant _ -> status
+ let status' = ref status in
+ (try
+ status' := MatitaSync.add_obj uri obj !status';
+ (match obj with
+ | Cic.Constant _ -> ()
| Cic.InductiveDefinition (_,_,_,attrs) ->
- let status = generate_elimination_principles uri status in
- let rec get_record_attrs =
- function
- [] -> None
- | (`Class (`Record fields))::_ -> Some fields
- | _::tl -> get_record_attrs tl
- in
+ status' := generate_elimination_principles uri !status';
+ let rec get_record_attrs =
+ function
+ | [] -> None
+ | (`Class (`Record fields))::_ -> Some fields
+ | _::tl -> get_record_attrs tl
+ in
(match get_record_attrs attrs with
- None -> status (* not a record *)
- | Some fields -> generate_projections uri fields status)
+ | None -> () (* not a record *)
+ | Some fields ->
+ status' := generate_projections uri fields !status')
| Cic.CurrentProof _
- | Cic.Variable _ -> assert false
+ | Cic.Variable _ -> assert false);
+ !status'
+ with exn ->
+ MatitaSync.time_travel ~present:!status' ~past:status;
+ raise exn)
let eval_executable opts status ex =
match ex with