diff options
Diffstat (limited to 'plugins/ltac/rewrite.ml')
| -rw-r--r-- | plugins/ltac/rewrite.ml | 41 |
1 files changed, 23 insertions, 18 deletions
diff --git a/plugins/ltac/rewrite.ml b/plugins/ltac/rewrite.ml index 966b11d0e7..f028abde9a 100644 --- a/plugins/ltac/rewrite.ml +++ b/plugins/ltac/rewrite.ml @@ -236,7 +236,7 @@ end) = struct let evars, arg' = app_poly env evars forall_relation [| ty ; pred ; liftarg |] in if Option.is_empty obj then evars, mkProd(na, ty, b), arg', (ty, None) :: cstrs else user_err Pp.(str "build_signature: no constraint can apply on a dependent argument") - | _, obj :: _ -> anomaly ~label:"build_signature" (Pp.str "not enough products") + | _, obj :: _ -> anomaly ~label:"build_signature" (Pp.str "not enough products.") | _, [] -> (match finalcstr with | None | Some (_, None) -> @@ -751,17 +751,23 @@ let default_flags = { under_lambdas = true; on_morphisms = true; } let get_opt_rew_rel = function RewPrf (rel, prf) -> Some rel | _ -> None -let make_eq () = -(*FIXME*) EConstr.of_constr (Universes.constr_of_global (Coqlib.build_coq_eq ())) -let make_eq_refl () = -(*FIXME*) EConstr.of_constr (Universes.constr_of_global (Coqlib.build_coq_eq_refl ())) +let new_global (evars, cstrs) gr = + let Sigma (c, sigma, _) = Evarutil.new_global (Sigma.Unsafe.of_evar_map evars) gr + in (Sigma.to_evar_map sigma, cstrs), c -let get_rew_prf r = match r.rew_prf with - | RewPrf (rel, prf) -> rel, prf +let make_eq sigma = + new_global sigma (Coqlib.build_coq_eq ()) +let make_eq_refl sigma = + new_global sigma (Coqlib.build_coq_eq_refl ()) + +let get_rew_prf evars r = match r.rew_prf with + | RewPrf (rel, prf) -> evars, (rel, prf) | RewCast c -> - let rel = mkApp (make_eq (), [| r.rew_car |]) in - rel, mkCast (mkApp (make_eq_refl (), [| r.rew_car; r.rew_from |]), - c, mkApp (rel, [| r.rew_from; r.rew_to |])) + let evars, eq = make_eq evars in + let evars, eq_refl = make_eq_refl evars in + let rel = mkApp (eq, [| r.rew_car |]) in + evars, (rel, mkCast (mkApp (eq_refl, [| r.rew_car; r.rew_from |]), + c, mkApp (rel, [| r.rew_from; r.rew_to |]))) let poly_subrelation sort = if sort then PropGlobal.subrelation else TypeGlobal.subrelation @@ -827,7 +833,8 @@ let resolve_morphism env avoid oldt m ?(fnewt=fun x -> x) args args' (b,cstr) ev env evars carrier relation x in [ proof ; x ; x ] @ acc, subst, evars, sigargs, x :: typeargs' | Some r -> - [ snd (get_rew_prf r); r.rew_to; x ] @ acc, subst, evars, + let evars, proof = get_rew_prf evars r in + [ snd proof; r.rew_to; x ] @ acc, subst, evars, sigargs, r.rew_to :: typeargs') | None -> if not (Option.is_empty y) then @@ -847,7 +854,8 @@ let apply_constraint env avoid car rel prf cstr res = | Some r -> resolve_subrelation env avoid car rel (fst cstr) prf r res let coerce env avoid cstr res = - let rel, prf = get_rew_prf res in + let evars, (rel, prf) = get_rew_prf res.rew_evars res in + let res = { res with rew_evars = evars } in apply_constraint env avoid res.rew_car rel prf cstr res let apply_rule unify loccs : int pure_strategy = @@ -868,8 +876,7 @@ let apply_rule unify loccs : int pure_strategy = else if Termops.eq_constr (fst rew.rew_evars) t rew.rew_to then (occ, Identity) else let res = { rew with rew_car = ty } in - let rel, prf = get_rew_prf res in - let res = Success (apply_constraint env unfresh rew.rew_car rel prf cstr res) in + let res = Success (coerce env unfresh cstr res) in (occ, res) } @@ -1231,9 +1238,7 @@ let subterm all flags (s : 'a pure_strategy) : 'a pure_strategy = in let res = match res with - | Success r -> - let rel, prf = get_rew_prf r in - Success (apply_constraint env unfresh r.rew_car rel prf (prop,cstr) r) + | Success r -> Success (coerce env unfresh (prop,cstr) r) | Fail | Identity -> res in state, res | _ -> state, Fail @@ -1419,7 +1424,7 @@ module Strategies = let unfolded = try Tacred.try_red_product env sigma c with e when CErrors.noncritical e -> - user_err Pp.(str "fold: the term is not unfoldable !") + user_err Pp.(str "fold: the term is not unfoldable!") in try let sigma = Unification.w_unify env sigma CONV ~flags:(Unification.elim_flags ()) unfolded t in |