diff options
Diffstat (limited to 'pretyping/coercion.ml')
| -rw-r--r-- | pretyping/coercion.ml | 85 |
1 files changed, 54 insertions, 31 deletions
diff --git a/pretyping/coercion.ml b/pretyping/coercion.ml index 04cb6a59..e15c00f7 100644 --- a/pretyping/coercion.ml +++ b/pretyping/coercion.ml @@ -20,6 +20,7 @@ open CErrors open Util open Names open Term +open Constr open Environ open EConstr open Vars @@ -48,31 +49,35 @@ exception NoCoercion exception NoCoercionNoUnifier of evar_map * unification_error (* Here, funj is a coercion therefore already typed in global context *) -let apply_coercion_args env evd check isproj argl funj = - let evdref = ref evd in - let rec apply_rec acc typ = function +let apply_coercion_args env sigma check isproj argl funj = + let rec apply_rec sigma acc typ = function | [] -> - if isproj then - let cst = fst (destConst !evdref (j_val funj)) in - let p = Projection.make cst false in - let pb = lookup_projection p env in - let args = List.skipn pb.Declarations.proj_npars argl in - let hd, tl = match args with hd :: tl -> hd, tl | [] -> assert false in - { uj_val = applist (mkProj (p, hd), tl); - uj_type = typ } - else - { uj_val = applist (j_val funj,argl); - uj_type = typ } + (match isproj with + | Some p -> + let npars = Projection.Repr.npars p in + let p = Projection.make p false in + let args = List.skipn npars argl in + let hd, tl = match args with hd :: tl -> hd, tl | [] -> assert false in + sigma, { uj_val = applist (mkProj (p, hd), tl); + uj_type = typ } + | None -> + sigma, { uj_val = applist (j_val funj,argl); + uj_type = typ }) | h::restl -> (* On devrait pouvoir s'arranger pour qu'on n'ait pas a faire hnf_constr *) - match EConstr.kind !evdref (whd_all env !evdref typ) with + match EConstr.kind sigma (whd_all env sigma typ) with | Prod (_,c1,c2) -> - if check && not (e_cumul env evdref (Retyping.get_type_of env !evdref h) c1) then - raise NoCoercion; - apply_rec (h::acc) (subst1 h c2) restl + let sigma = + if check then + begin match cumul env sigma (Retyping.get_type_of env sigma h) c1 with + | None -> raise NoCoercion + | Some sigma -> sigma + end + else sigma + in + apply_rec sigma (h::acc) (subst1 h c2) restl | _ -> anomaly (Pp.str "apply_coercion_args.") in - let res = apply_rec [] funj.uj_type argl in - !evdref, res + apply_rec sigma [] funj.uj_type argl (* appliquer le chemin de coercions de patterns p *) let apply_pattern_coercion ?loc pat p = @@ -93,8 +98,14 @@ let inh_pattern_coerce_to ?loc env pat ind1 ind2 = open Program let make_existential ?loc ?(opaque = not (get_proofs_transparency ())) na env evdref c = - let src = Loc.tag ?loc (Evar_kinds.QuestionMark (Evar_kinds.Define opaque,na)) in - Evarutil.e_new_evar env evdref ~src c + let src = Loc.tag ?loc (Evar_kinds.QuestionMark { + Evar_kinds.default_question_mark with + Evar_kinds.qm_obligation=Evar_kinds.Define opaque; + Evar_kinds.qm_name=na; + }) in + let evd, v = Evarutil.new_evar env !evdref ~src c in + evdref := evd; + v let app_opt env evdref f t = whd_betaiota !evdref (app_opt f t) @@ -191,7 +202,8 @@ and coerce ?loc env evdref (x : EConstr.constr) (y : EConstr.constr) (subst1 hdy restT') (succ i) (fun x -> eq_app (co x)) else Some (fun x -> let term = co x in - Typing.e_solve_evars env evdref term) + let sigma, term = Typing.solve_evars env !evdref term in + evdref := sigma; term) in if isEvar !evdref c || isEvar !evdref c' || not (Program.is_program_generalized_coercion ()) then (* Second-order unification needed. *) @@ -201,8 +213,8 @@ and coerce ?loc env evdref (x : EConstr.constr) (y : EConstr.constr) match (EConstr.kind !evdref x, EConstr.kind !evdref y) with | Sort s, Sort s' -> (match ESorts.kind !evdref s, ESorts.kind !evdref s' with - | Prop x, Prop y when x == y -> None - | Prop _, Type _ -> None + | Prop, Prop | Set, Set -> None + | (Prop | Set), Type _ -> None | Type x, Type y when Univ.Universe.equal x y -> None (* false *) | _ -> subco ()) | Prod (name, a, b), Prod (name', a', b') -> @@ -251,7 +263,7 @@ and coerce ?loc env evdref (x : EConstr.constr) (y : EConstr.constr) let (n, dom, rng) = destLambda !evdref t in if isEvar !evdref dom then let (domk, args) = destEvar !evdref dom in - evdref := define domk (EConstr.Unsafe.to_constr a) !evdref; + evdref := define domk a !evdref; else (); t, rng | _ -> raise NoSubtacCoercion @@ -337,8 +349,9 @@ let app_coercion env evdref coercion v = match coercion with | None -> v | Some f -> - let v' = Typing.e_solve_evars env evdref (f v) in - whd_betaiota !evdref v' + let sigma, v' = Typing.solve_evars env !evdref (f v) in + evdref := sigma; + whd_betaiota !evdref v' let coerce_itf ?loc env evd v t c1 = let evdref = ref evd in @@ -350,14 +363,25 @@ let saturate_evd env evd = Typeclasses.resolve_typeclasses ~filter:Typeclasses.no_goals ~split:true ~fail:false env evd +let warn_coercion_not_in_scope = + CWarnings.create ~name:"coercion-not-in-scope" ~category:"deprecated" + Pp.(fun r -> str "Coercion used but not in scope: " ++ + Nametab.pr_global_env Id.Set.empty r ++ str ". If you want to use " + ++ str "this coercion, please Import the module that contains it.") + (* Apply coercion path from p to hj; raise NoCoercion if not applicable *) let apply_coercion env sigma p hj typ_cl = try let j,t,evd = List.fold_left (fun (ja,typ_cl,sigma) i -> - let ((fv,isid,isproj),ctx) = coercion_value i in - let sigma = Evd.merge_context_set Evd.univ_flexible sigma ctx in + if not (is_coercion_in_scope i.coe_value) then + warn_coercion_not_in_scope i.coe_value; + let isid = i.coe_is_identity in + let isproj = i.coe_is_projection in + let sigma, c = new_global sigma i.coe_value in + let typ = Retyping.get_type_of env sigma c in + let fv = make_judge c typ in let argl = (class_args_of env sigma typ_cl)@[ja.uj_val] in let sigma, jres = apply_coercion_args env sigma true isproj argl fv @@ -370,7 +394,6 @@ let apply_coercion env sigma p hj typ_cl = (hj,typ_cl,sigma) p in evd, j with NoCoercion as e -> raise e - | e when CErrors.noncritical e -> anomaly (Pp.str "apply_coercion.") (* Try to coerce to a funclass; raise NoCoercion if not possible *) let inh_app_fun_core env evd j = |