diff options
Diffstat (limited to 'lib/hipe/cerl')
| -rw-r--r-- | lib/hipe/cerl/erl_types.erl | 38 |
1 files changed, 27 insertions, 11 deletions
diff --git a/lib/hipe/cerl/erl_types.erl b/lib/hipe/cerl/erl_types.erl index f0b907f86c..ad92324911 100644 --- a/lib/hipe/cerl/erl_types.erl +++ b/lib/hipe/cerl/erl_types.erl @@ -4010,16 +4010,25 @@ t_from_form_without_remote(Form, Site, TypeTable) -> -type expand_depth() :: integer(). +-spec t_from_form1(parse_form(), sets:set(mfa()) | 'replace_by_none', + site(), mod_records(), var_table()) -> + {erl_type(), expand_limit()}. + t_from_form1(Form, ET, Site, MR, V) -> - t_from_form1(Form, ET, Site, MR, V, ?EXPAND_DEPTH). + TypeNames = initial_typenames(Site), + t_from_form1(Form, TypeNames, ET, Site, MR, V, ?EXPAND_DEPTH). + +initial_typenames({type, _MTA}=Site) -> [Site]; +initial_typenames({spec, _MFA}) -> []; +initial_typenames({record, _MRA}) -> []. -t_from_form1(Form, ET, Site, MR, V, D) -> +t_from_form1(Form, TypeNames, ET, Site, MR, V, D) -> L = ?EXPAND_LIMIT, - {T, L1} = t_from_form(Form, [], ET, Site, MR, V, D, L), + {T, L1} = t_from_form(Form, TypeNames, ET, Site, MR, V, D, L), if L1 =< 0, D > 1 -> D1 = D div 2, - t_from_form1(Form, ET, Site, MR, V, D1); + t_from_form1(Form, TypeNames, ET, Site, MR, V, D1); true -> {T, L1} end. @@ -4259,7 +4268,7 @@ type_from_form(Name, Args, TypeNames, ET, Site0, MR, V, D, L) -> false -> {t_any(), L1} end, Rep1 = choose_opaque_type(Rep, Type), - Rep2 = case t_is_none(Rep1) of + Rep2 = case cannot_have_opaque(Rep1, TypeName, TypeNames) of true -> Rep1; false -> ArgTypes2 = subst_all_vars_to_any_list(ArgTypes), @@ -4307,18 +4316,19 @@ remote_from_form(RemMod, Name, Args, TypeNames, ET, S, MR, V, D, L) -> case can_unfold_more(RemType, TypeNames) of true -> NewTypeNames = [RemType|TypeNames], - t_from_form(Form, NewTypeNames, ET, RemMod, MR, + Site = RemType, + t_from_form(Form, NewTypeNames, ET, Site, MR, TmpVarDict, D, L1); - false -> - {t_any(), L1} + false -> {t_any(), L1} end, NewRep1 = choose_opaque_type(NewRep, Type), - NewRep2 = case t_is_none(NewRep1) of - true -> NewRep1; + NewRep2 = + case cannot_have_opaque(NewRep1, RemType, TypeNames) of + true -> NewRep1; false -> ArgTypes2 = subst_all_vars_to_any_list(ArgTypes), t_opaque(Mod, Name, ArgTypes2, NewRep1) - end, + end, {NewRep2, L2}; error -> Msg = io_lib:format("Unable to find remote type ~w:~w()\n", @@ -4704,6 +4714,12 @@ lookup_type(Name, Arity, RecDict) -> type_is_defined(TypeOrOpaque, Name, Arity, RecDict) -> dict:is_key({TypeOrOpaque, Name, Arity}, RecDict). +cannot_have_opaque(Type, TypeName, TypeNames) -> + t_is_none(Type) orelse is_recursive(TypeName, TypeNames). + +is_recursive(TypeName, TypeNames) -> + lists:member(TypeName, TypeNames). + can_unfold_more(TypeName, TypeNames) -> Fun = fun(E, Acc) -> case E of TypeName -> Acc + 1; _ -> Acc end end, lists:foldl(Fun, 0, TypeNames) < ?REC_TYPE_LIMIT. |