module P = PrimitiveTactics
module T = Tacticals
module R = CicReduction
+module S = CicSubstitution
module TC = CicTypeChecker
module LO = LibraryObjects
module DTI = DoubleTypeInference
(rewrite_tac ~direction
~pattern:(None,[he],None) equality)
(rewrite_tac ~direction ~pattern:(None,tl,concl_pat)
- (CicSubstitution.lift 1 equality))
+ (S.lift 1 equality))
) status
| [_] as hyps_pat when concl_pat <> None ->
PET.apply_tactic
(rewrite_tac ~direction
~pattern:(None,hyps_pat,None) equality)
(rewrite_tac ~direction ~pattern:(None,[],concl_pat)
- (CicSubstitution.lift 1 equality))
+ (S.lift 1 equality))
) status
| _ ->
let arg,dir2,tac,concl_pat,gty =
function
[] -> assert false
| Some (Cic.Name s,Cic.Decl ty)::_ when name = s ->
- Cic.Rel n, CicSubstitution.lift n ty
+ Cic.Rel n, S.lift n ty
| Some (Cic.Name s,Cic.Def _)::_ -> assert false (*CSC: not implemented yet! But does this make any sense?*)
| _::tl -> find_hyp (n+1) tl
in
let fresh_name =
FreshNamesGenerator.mk_fresh_name
~subst:[] metasenv' context C.Anonymous ~typ:ty in
- let lifted_t1 = CicSubstitution.lift 1 t1x in
- let lifted_gty = CicSubstitution.lift 1 gty in
+ let lifted_t1 = S.lift 1 t1x in
+ let lifted_gty = S.lift 1 gty in
let lifted_conjecture =
metano,(Some (fresh_name,Cic.Decl ty))::context,lifted_gty in
let lifted_pattern =
let lifted_concl_pat =
match concl_pat with
| None -> None
- | Some term -> Some (CicSubstitution.lift 1 term) in
+ | Some term -> Some (S.lift 1 term) in
Some (fun _ m u -> lifted_t1, m, u),[],lifted_concl_pat
in
let subst,metasenv',ugraph,_,selected_terms_with_context =
let metasenv',arg,newtyp =
match arg with
None ->
- let gty' = CicSubstitution.subst t2 abstr_gty in
+ let gty' = S.subst t2 abstr_gty in
let irl =
CicMkImplicit.identity_relocation_list_for_metavariable context in
let metasenv' = (fresh_meta,context,gty')::metasenv' in
metasenv', C.Meta (fresh_meta,irl), Cic.Rel (-1) (* dummy term, never used *)
| Some arg ->
- let gty' = CicSubstitution.subst t1 abstr_gty in
+ let gty' = S.subst t1 abstr_gty in
metasenv',arg,gty'
in
let exact_proof =
in
(proof',goals)
with (* FG: this should be PET.Fail _ *)
- TC.TypeCheckerFailure _ -> PET.apply_tactic (P.letout_tac ()) status
+ TC.TypeCheckerFailure _ ->
+ let msg = lazy "rewrite: nothing to rewrite" in
+ raise (PET.Fail msg)
in
ProofEngineTypes.mk_tactic (_rewrite_tac ~direction ~pattern equality)
match whats with
[] -> ProofEngineTypes.apply_tactic T.id_tac status
| (what,lazy_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
+ let what = S.lift n what in
+ let with_what = S.lift n with_what in
+ let ty_of_with_what = S.lift n ty_of_with_what in
ProofEngineTypes.apply_tactic
(T.thens
~start:(
ProofEngineTypes.mk_tactic (transitivity_tac ~term)
;;
-(* FG *)
+(* FG: subst tactic *********************************************************)
+
+(* FG: This should be replaced by T.try_tactic *)
+let try_tactic ~tactic =
+ let try_tactic status =
+ try PET.apply_tactic tactic status with
+ | PET.Fail _ -> PET.apply_tactic T.id_tac status
+ in
+ PET.mk_tactic try_tactic
+
+let rec lift_rewrite_tac ~context ~direction ~pattern equality =
+ let lift_rewrite_tac status =
+ let (proof, goal) = status in
+ let (_, metasenv, _, _) = proof in
+ let _, new_context, _ = CicUtil.lookup_meta goal metasenv in
+ let n = List.length new_context - List.length context in
+ let equality = if n > 0 then S.lift n equality else equality in
+ PET.apply_tactic (rewrite_tac ~direction ~pattern equality) status
+ in
+ PET.mk_tactic lift_rewrite_tac
+
let msg0 = lazy "Subst: not found in context"
let msg1 = lazy "Subst: not a simple equality"
let subst_tac ~hyp =
let hole = C.Implicit (Some `Hole) in
- let map self = function
- | Some (C.Name s, _) when s <> self -> Some (s, hole)
- | _ -> None
- in
let subst_tac status =
let (proof, goal) = status in
let (_, metasenv, _, _) = proof in
when LO.is_eq_URI uri -> `RightToLeft, i, t
| _ -> raise (PET.Fail msg1)
in
+ let rewrite pattern =
+ let tactic = lift_rewrite_tac ~context ~direction ~pattern what in
+ try_tactic ~tactic
+ in
let var = match PEH.get_name context i with
| Some name -> name
| None -> raise (PET.Fail msg0)
in
if DTI.does_not_occur i t then () else raise (PET.Fail msg2);
- let pattern = None, PEH.list_rev_map_filter (map hyp) context, Some hole in
- let start = rewrite_tac ~direction ~pattern what in
- let continuation = PESR.clear ~hyps:[hyp; var] in
- let tac = T.then_ ~start ~continuation in
- PET.apply_tactic tac status
+ let map self = function
+ | Some (C.Name s, _) when s <> self ->
+ Some (rewrite (None, [(s, hole)], None))
+ | _ -> None
+ in
+ let rew_hips = PEH.list_rev_map_filter (map hyp) context in
+ let rew_concl = rewrite (None, [], Some hole) in
+ let clear = PESR.clear ~hyps:[hyp; var] in
+ let tactics = List.rev_append (rew_concl :: rew_hips) [clear] in
+ PET.apply_tactic (T.seq ~tactics) status
+ in
+ PET.mk_tactic subst_tac
+
+let subst_tac =
+ let subst hyp = try_tactic ~tactic:(subst_tac hyp) in
+ let map = function
+ | Some (C.Name s, _) -> Some (subst s)
+ | _ -> None
+ in
+ let subst_tac status =
+ let (proof, goal) = status in
+ let (_, metasenv, _, _) = proof in
+ let _, context, _ = CicUtil.lookup_meta goal metasenv in
+ let tactics = PEH.list_rev_map_filter map context in
+ PET.apply_tactic (T.seq ~tactics) status
in
PET.mk_tactic subst_tac
projects / helm.git / blobdiff