diff options
| -rw-r--r-- | checker/subtyping.ml | 32 | ||||
| -rw-r--r-- | checker/univ.ml | 15 | ||||
| -rw-r--r-- | checker/univ.mli | 6 |
3 files changed, 38 insertions, 15 deletions
diff --git a/checker/subtyping.ml b/checker/subtyping.ml index 303b18476..3097c3a0b 100644 --- a/checker/subtyping.ml +++ b/checker/subtyping.ml @@ -81,6 +81,14 @@ let check_conv_error error f env a1 a2 = with NotConvertible -> error () +let check_polymorphic_instance error env auctx1 auctx2 = + if not (Univ.AUContext.size auctx1 == Univ.AUContext.size auctx2) then + error () + else if not (Univ.check_subtype (Environ.universes env) auctx2 auctx1) then + error () + else + Environ.push_context ~strict:false (Univ.AUContext.repr auctx2) env + (* for now we do not allow reorderings *) let check_inductive env mp1 l info1 mib2 spec2 subst1 subst2= let kn = MutInd.make2 mp1 l in @@ -93,19 +101,17 @@ let check_inductive env mp1 l info1 mib2 spec2 subst1 subst2= in let mib2 = subst_mind subst2 mib2 in let check eq f = if not (eq (f mib1) (f mib2)) then error () in - let u = - let process inst inst' = - if Univ.Instance.equal inst inst' then inst else error () - in + let env, u = match mib1.mind_universes, mib2.mind_universes with - | Monomorphic_ind _, Monomorphic_ind _ -> Univ.Instance.empty + | Monomorphic_ind _, Monomorphic_ind _ -> env, Univ.Instance.empty | Polymorphic_ind auctx, Polymorphic_ind auctx' -> - process - (Univ.AUContext.instance auctx) (Univ.AUContext.instance auctx') + let env = check_polymorphic_instance error env auctx auctx' in + env, Univ.make_abstract_instance auctx' | Cumulative_ind cumi, Cumulative_ind cumi' -> - process - (Univ.AUContext.instance (Univ.ACumulativityInfo.univ_context cumi)) - (Univ.AUContext.instance (Univ.ACumulativityInfo.univ_context cumi')) + let auctx = Univ.ACumulativityInfo.univ_context cumi in + let auctx' = Univ.ACumulativityInfo.univ_context cumi' in + let env = check_polymorphic_instance error env auctx auctx' in + env, Univ.make_abstract_instance auctx' | _ -> error () in let eq_projection_body p1 p2 = @@ -118,7 +124,7 @@ let check_inductive env mp1 l info1 mib2 spec2 subst1 subst2= check (eq_constr) (fun x -> snd x.proj_eta); check (eq_constr) (fun x -> x.proj_body); true in - let check_inductive_type env t1 t2 = + let check_inductive_type t1 t2 = (* Due to template polymorphism, the conclusions of t1 and t2, if in Type, are generated as the least upper bounds @@ -170,8 +176,8 @@ let check_inductive env mp1 l info1 mib2 spec2 subst1 subst2= (* nparams done *) (* params_ctxt done because part of the inductive types *) (* Don't check the sort of the type if polymorphic *) - check_inductive_type env - (type_of_inductive env ((mib1,p1),u)) (type_of_inductive env ((mib2,p2),u)) + check_inductive_type + (type_of_inductive env ((mib1,p1), u)) (type_of_inductive env ((mib2,p2),u)) in let check_cons_types i p1 p2 = Array.iter2 (check_conv conv env) diff --git a/checker/univ.ml b/checker/univ.ml index 600af230c..2cd4252b2 100644 --- a/checker/univ.ml +++ b/checker/univ.ml @@ -1216,6 +1216,9 @@ module AUContext = struct include UContext + let repr (inst, cst) = + (Array.mapi (fun i l -> Level.var i) inst, cst) + let instantiate inst (u, cst) = assert (Array.length u = Array.length inst); subst_instance_constraints inst cst @@ -1278,7 +1281,17 @@ struct end type universe_context_set = ContextSet.t - +(** Instance subtyping *) + +let check_subtype univs ctxT ctx = + if AUContext.size ctx == AUContext.size ctx then + let (inst, cst) = AUContext.repr ctx in + let cstT = UContext.constraints (AUContext.repr ctxT) in + let push accu v = add_universe v false accu in + let univs = Array.fold_left push univs inst in + let univs = merge_constraints cstT univs in + check_constraints cst univs + else false (** Substitutions. *) diff --git a/checker/univ.mli b/checker/univ.mli index 75c76cd12..01df46fa1 100644 --- a/checker/univ.mli +++ b/checker/univ.mli @@ -212,6 +212,7 @@ sig val size : t -> int val instantiate : Instance.t -> t -> Constraint.t + val repr : t -> UContext.t end @@ -289,7 +290,10 @@ val instantiate_cumulativity_info : abstract_cumulativity_info -> cumulativity_i (** Build the relative instance corresponding to the context *) val make_abstract_instance : abstract_universe_context -> universe_instance - + +(** Check instance subtyping *) +val check_subtype : universes -> AUContext.t -> AUContext.t -> bool + (** {6 Pretty-printing of universes. } *) val pr_constraint_type : constraint_type -> Pp.std_ppcmds |