diff options
author | 2008-06-03 23:08:00 +0000 | |
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committer | 2008-06-03 23:08:00 +0000 | |
commit | 908900165bc6a5b2eb9bc4f177311ee2409dbd6a (patch) | |
tree | 8fc23b2e62b06e7a9be28e4bce9fcbb77c4a12fe /pretyping | |
parent | e984c9a611936280e2c0e4a1d4b1739c3d32f4dd (diff) |
Fixes incorrect handling of existing existentials variables in
typeclass code.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11047 85f007b7-540e-0410-9357-904b9bb8a0f7
Diffstat (limited to 'pretyping')
-rw-r--r-- | pretyping/pretyping.ml | 30 | ||||
-rw-r--r-- | pretyping/pretyping.mli | 2 | ||||
-rw-r--r-- | pretyping/typeclasses.ml | 15 | ||||
-rw-r--r-- | pretyping/typeclasses.mli | 3 |
4 files changed, 34 insertions, 16 deletions
diff --git a/pretyping/pretyping.ml b/pretyping/pretyping.ml index 1a5bd0c46..11d3b3710 100644 --- a/pretyping/pretyping.ml +++ b/pretyping/pretyping.ml @@ -98,7 +98,7 @@ sig unresolved holes as evars and returning the typing contexts of these evars. Work as [understand_gen] for the rest. *) - val understand_tcc : + val understand_tcc : ?resolve_classes:bool -> evar_map -> env -> ?expected_type:types -> rawconstr -> open_constr val understand_tcc_evars : @@ -647,7 +647,7 @@ module Pretyping_F (Coercion : Coercion.S) = struct error_unexpected_type_loc (loc_of_rawconstr c) env (evars_of !evdref) tj.utj_val v - let pretype_gen evdref env lvar kind c = + let pretype_gen_aux evdref env lvar kind c = let c' = match kind with | OfType exptyp -> let tycon = match exptyp with None -> empty_tycon | Some t -> mk_tycon t in @@ -655,10 +655,13 @@ module Pretyping_F (Coercion : Coercion.S) = struct | IsType -> (pretype_type empty_valcon env evdref lvar c).utj_val in let evd,_ = consider_remaining_unif_problems env !evdref in - let evd = Typeclasses.resolve_typeclasses ~onlyargs:true ~fail:false env (evars_of evd) evd in - evdref := evd; - nf_evar (evars_of evd) c' - + evdref := evd; c' + + let pretype_gen evdref env lvar kind c = + let c = pretype_gen_aux evdref env lvar kind c in + evdref := Typeclasses.resolve_typeclasses ~onlyargs:true ~fail:false env !evdref; + nf_evar (evars_of !evdref) c + (* TODO: comment faire remonter l'information si le typage a resolu des variables du sigma original. il faudrait que la fonction de typage retourne aussi le nouveau sigma... @@ -669,7 +672,7 @@ module Pretyping_F (Coercion : Coercion.S) = struct let j = pretype empty_tycon env evdref ([],[]) c in let evd,_ = consider_remaining_unif_problems env !evdref in let j = j_nf_evar (evars_of evd) j in - let evd = Typeclasses.resolve_typeclasses ~onlyargs:true ~fail:true env (evars_of evd) evd in + let evd = Typeclasses.resolve_typeclasses ~onlyargs:true ~fail:true env evd in let j = j_nf_evar (evars_of evd) j in check_evars env sigma evd (mkCast(j.uj_val,DEFAULTcast, j.uj_type)); j @@ -689,7 +692,7 @@ module Pretyping_F (Coercion : Coercion.S) = struct let c = pretype_gen evdref env lvar kind c in let evd,_ = consider_remaining_unif_problems env !evdref in if fail_evar then - let evd = Typeclasses.resolve_typeclasses ~onlyargs:false ~fail:true env (evars_of evd) evd in + let evd = Typeclasses.resolve_typeclasses ~onlyargs:false ~fail:true env evd in let c = Evarutil.nf_isevar evd c in check_evars env Evd.empty evd c; evd, c @@ -712,8 +715,15 @@ module Pretyping_F (Coercion : Coercion.S) = struct let understand_tcc_evars evdref env kind c = pretype_gen evdref env ([],[]) kind c - let understand_tcc sigma env ?expected_type:exptyp c = - let evd, t = ise_pretype_gen false sigma env ([],[]) (OfType exptyp) c in + let understand_tcc ?(resolve_classes=true) sigma env ?expected_type:exptyp c = + let evd, t = + if resolve_classes then + ise_pretype_gen false sigma env ([],[]) (OfType exptyp) c + else + let evdref = ref (Evd.create_evar_defs sigma) in + let c = pretype_gen_aux evdref env ([],[]) (OfType exptyp) c in + !evdref, nf_isevar !evdref c + in Evd.evars_of evd, t end diff --git a/pretyping/pretyping.mli b/pretyping/pretyping.mli index 64144f9a4..e7a8374b5 100644 --- a/pretyping/pretyping.mli +++ b/pretyping/pretyping.mli @@ -40,7 +40,7 @@ sig unresolved holes as evars and returning the typing contexts of these evars. Work as [understand_gen] for the rest. *) - val understand_tcc : + val understand_tcc : ?resolve_classes:bool -> evar_map -> env -> ?expected_type:types -> rawconstr -> open_constr val understand_tcc_evars : diff --git a/pretyping/typeclasses.ml b/pretyping/typeclasses.ml index ee385430c..4b078ff30 100644 --- a/pretyping/typeclasses.ml +++ b/pretyping/typeclasses.ml @@ -394,22 +394,29 @@ let dest_class_app c = let ((bool_in : bool -> Dyn.t), (bool_out : Dyn.t -> bool)) = Dyn.create "bool" +let bool_false = bool_in false + let is_resolvable evi = match evi.evar_extra with Some t -> if Dyn.tag t = "bool" then bool_out t else true | None -> true let mark_unresolvable evi = - { evi with evar_extra = Some (bool_in false) } - + { evi with evar_extra = Some bool_false } + +let mark_unresolvables sigma = + Evd.fold (fun ev evi evs -> + Evd.add evs ev (mark_unresolvable evi)) + sigma Evd.empty + let has_typeclasses evd = Evd.fold (fun ev evi has -> has || (evi.evar_body = Evar_empty && class_of_constr evi.evar_concl <> None && is_resolvable evi)) evd false -let resolve_typeclasses ?(onlyargs=false) ?(fail=true) env sigma evd = - if not (has_typeclasses sigma) then evd +let resolve_typeclasses ?(onlyargs=false) ?(fail=true) env evd = + if not (has_typeclasses (Evd.evars_of evd)) then evd else !solve_instanciations_problem env (Evarutil.nf_evar_defs evd) onlyargs fail diff --git a/pretyping/typeclasses.mli b/pretyping/typeclasses.mli index e3c780402..b12a85869 100644 --- a/pretyping/typeclasses.mli +++ b/pretyping/typeclasses.mli @@ -77,8 +77,9 @@ val bool_out : Dyn.t -> bool val is_resolvable : evar_info -> bool val mark_unresolvable : evar_info -> evar_info +val mark_unresolvables : evar_map -> evar_map -val resolve_typeclasses : ?onlyargs:bool -> ?fail:bool -> env -> evar_map -> evar_defs -> evar_defs +val resolve_typeclasses : ?onlyargs:bool -> ?fail:bool -> env -> evar_defs -> evar_defs val solve_instanciation_problem : (env -> evar_defs -> existential_key -> evar_info -> evar_defs * bool) ref val solve_instanciations_problem : (env -> evar_defs -> bool -> bool -> evar_defs) ref |