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-rw-r--r--lib/dialyzer/src/dialyzer_contracts.erl189
1 files changed, 102 insertions, 87 deletions
diff --git a/lib/dialyzer/src/dialyzer_contracts.erl b/lib/dialyzer/src/dialyzer_contracts.erl
index f27fc1a842..7251de8b10 100644
--- a/lib/dialyzer/src/dialyzer_contracts.erl
+++ b/lib/dialyzer/src/dialyzer_contracts.erl
@@ -2,18 +2,19 @@
%%-----------------------------------------------------------------------
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2007-2014. All Rights Reserved.
+%% Copyright Ericsson AB 2007-2015. All Rights Reserved.
%%
-%% The contents of this file are subject to the Erlang Public License,
-%% Version 1.1, (the "License"); you may not use this file except in
-%% compliance with the License. You should have received a copy of the
-%% Erlang Public License along with this software. If not, it can be
-%% retrieved online at http://www.erlang.org/.
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
%%
-%% Software distributed under the License is distributed on an "AS IS"
-%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-%% the License for the specific language governing rights and limitations
-%% under the License.
+%% http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
%%
%% %CopyrightEnd%
%%
@@ -43,9 +44,9 @@
%% Types used in other parts of the system below
%%-----------------------------------------------------------------------
--type file_contract() :: {file_line(), #contract{}}.
+-type file_contract() :: {file_line(), #contract{}, Extra :: [_]}.
--type plt_contracts() :: [{mfa(), #contract{}}]. % actually, an orddict()
+-type plt_contracts() :: orddict:orddict(mfa(), #contract{}).
%%-----------------------------------------------------------------------
%% Internal record for contracts whose components have not been processed
@@ -146,10 +147,10 @@ process_contract_remote_types(CodeServer) ->
ExpTypes = dialyzer_codeserver:get_exported_types(CodeServer),
RecordDict = dialyzer_codeserver:get_records(CodeServer),
ContractFun =
- fun({_M, _F, _A}, {File, #tmp_contract{contract_funs = CFuns, forms = Forms}}) ->
+ fun({_M, _F, _A}, {File, #tmp_contract{contract_funs = CFuns, forms = Forms}, Xtra}) ->
NewCs = [CFun(ExpTypes, RecordDict) || CFun <- CFuns],
Args = general_domain(NewCs),
- {File, #contract{contracts = NewCs, args = Args, forms = Forms}}
+ {File, #contract{contracts = NewCs, args = Args, forms = Forms}, Xtra}
end,
ModuleFun =
fun(_ModuleName, ContractDict) ->
@@ -175,7 +176,7 @@ check_contracts(Contracts, Callgraph, FunTypes, FindOpaques) ->
case dialyzer_callgraph:lookup_name(Label, Callgraph) of
{ok, {M,F,A} = MFA} ->
case orddict:find(MFA, Contracts) of
- {ok, {_FileLine, Contract}} ->
+ {ok, {_FileLine, Contract, _Xtra}} ->
Opaques = FindOpaques(M),
case check_contract(Contract, Type, Opaques) of
ok ->
@@ -351,7 +352,7 @@ solve_constraints(Contract, Call, Constraints) ->
%% Checks the contracts for functions that are not implemented
-spec contracts_without_fun(contracts(), [_], dialyzer_callgraph:callgraph()) ->
- [dial_warning()].
+ [raw_warning()].
contracts_without_fun(Contracts, AllFuns0, Callgraph) ->
AllFuns1 = [{dialyzer_callgraph:lookup_name(Label, Callgraph), Arity}
@@ -362,8 +363,9 @@ contracts_without_fun(Contracts, AllFuns0, Callgraph) ->
[warn_spec_missing_fun(MFA, Contracts) || MFA <- ErrorContractMFAs].
warn_spec_missing_fun({M, F, A} = MFA, Contracts) ->
- {FileLine, _Contract} = dict:fetch(MFA, Contracts),
- {?WARN_CONTRACT_SYNTAX, FileLine, {spec_missing_fun, [M, F, A]}}.
+ {{File, Line}, _Contract, _Xtra} = dict:fetch(MFA, Contracts),
+ WarningInfo = {File, Line, MFA},
+ {?WARN_CONTRACT_SYNTAX, WarningInfo, {spec_missing_fun, [M, F, A]}}.
%% This treats the "when" constraints. It will be extended, we hope.
insert_constraints([{subtype, Type1, Type2}|Left], Dict) ->
@@ -386,26 +388,28 @@ insert_constraints([], Dict) -> Dict.
-type types() :: erl_types:type_table().
--spec store_tmp_contract(mfa(), file_line(), [_], contracts(), types()) ->
+-type spec_data() :: {TypeSpec :: [_], Xtra:: [_]}.
+
+-spec store_tmp_contract(mfa(), file_line(), spec_data(), contracts(), types()) ->
contracts().
-store_tmp_contract(MFA, FileLine, TypeSpec, SpecDict, RecordsDict) ->
+store_tmp_contract(MFA, FileLine, {TypeSpec, Xtra}, SpecDict, RecordsDict) ->
%% io:format("contract from form: ~p\n", [TypeSpec]),
- TmpContract = contract_from_form(TypeSpec, RecordsDict, FileLine),
+ TmpContract = contract_from_form(TypeSpec, MFA, RecordsDict, FileLine),
%% io:format("contract: ~p\n", [TmpContract]),
- dict:store(MFA, {FileLine, TmpContract}, SpecDict).
+ dict:store(MFA, {FileLine, TmpContract, Xtra}, SpecDict).
-contract_from_form(Forms, RecDict, FileLine) ->
- {CFuns, Forms1} = contract_from_form(Forms, RecDict, FileLine, [], []),
+contract_from_form(Forms, MFA, RecDict, FileLine) ->
+ {CFuns, Forms1} = contract_from_form(Forms, MFA, RecDict, FileLine, [], []),
#tmp_contract{contract_funs = CFuns, forms = Forms1}.
-contract_from_form([{type, _, 'fun', [_, _]} = Form | Left], RecDict,
+contract_from_form([{type, _, 'fun', [_, _]} = Form | Left], MFA, RecDict,
FileLine, TypeAcc, FormAcc) ->
TypeFun =
fun(ExpTypes, AllRecords) ->
- Type =
+ NewType =
try
- erl_types:t_from_form(Form, RecDict)
+ from_form_with_check(Form, ExpTypes, MFA, AllRecords)
catch
throw:{error, Msg} ->
{File, Line} = FileLine,
@@ -413,61 +417,60 @@ contract_from_form([{type, _, 'fun', [_, _]} = Form | Left], RecDict,
Line, Msg]),
throw({error, NewMsg})
end,
- NewType = erl_types:t_solve_remote(Type, ExpTypes, AllRecords),
NewTypeNoVars = erl_types:subst_all_vars_to_any(NewType),
{NewTypeNoVars, []}
end,
NewTypeAcc = [TypeFun | TypeAcc],
NewFormAcc = [{Form, []} | FormAcc],
- contract_from_form(Left, RecDict, FileLine, NewTypeAcc, NewFormAcc);
+ contract_from_form(Left, MFA, RecDict, FileLine, NewTypeAcc, NewFormAcc);
contract_from_form([{type, _L1, bounded_fun,
[{type, _L2, 'fun', [_, _]} = Form, Constr]}| Left],
- RecDict, FileLine, TypeAcc, FormAcc) ->
+ MFA, RecDict, FileLine, TypeAcc, FormAcc) ->
TypeFun =
fun(ExpTypes, AllRecords) ->
{Constr1, VarDict} =
- process_constraints(Constr, RecDict, ExpTypes, AllRecords),
- Type = erl_types:t_from_form(Form, RecDict, VarDict),
- NewType = erl_types:t_solve_remote(Type, ExpTypes, AllRecords),
+ process_constraints(Constr, MFA, RecDict, ExpTypes, AllRecords),
+ NewType = from_form_with_check(Form, ExpTypes, MFA, AllRecords,
+ VarDict),
NewTypeNoVars = erl_types:subst_all_vars_to_any(NewType),
{NewTypeNoVars, Constr1}
end,
NewTypeAcc = [TypeFun | TypeAcc],
NewFormAcc = [{Form, Constr} | FormAcc],
- contract_from_form(Left, RecDict, FileLine, NewTypeAcc, NewFormAcc);
-contract_from_form([], _RecDict, _FileLine, TypeAcc, FormAcc) ->
+ contract_from_form(Left, MFA, RecDict, FileLine, NewTypeAcc, NewFormAcc);
+contract_from_form([], _MFA, _RecDict, _FileLine, TypeAcc, FormAcc) ->
{lists:reverse(TypeAcc), lists:reverse(FormAcc)}.
-process_constraints(Constrs, RecDict, ExpTypes, AllRecords) ->
- Init0 = initialize_constraints(Constrs, RecDict, ExpTypes, AllRecords),
+process_constraints(Constrs, MFA, RecDict, ExpTypes, AllRecords) ->
+ Init0 = initialize_constraints(Constrs, MFA, RecDict, ExpTypes, AllRecords),
Init = remove_cycles(Init0),
- constraints_fixpoint(Init, RecDict, ExpTypes, AllRecords).
+ constraints_fixpoint(Init, MFA, RecDict, ExpTypes, AllRecords).
-initialize_constraints(Constrs, RecDict, ExpTypes, AllRecords) ->
- initialize_constraints(Constrs, RecDict, ExpTypes, AllRecords, []).
+initialize_constraints(Constrs, MFA, RecDict, ExpTypes, AllRecords) ->
+ initialize_constraints(Constrs, MFA, RecDict, ExpTypes, AllRecords, []).
-initialize_constraints([], _RecDict, _ExpTypes, _AllRecords, Acc) ->
+initialize_constraints([], _MFA, _RecDict, _ExpTypes, _AllRecords, Acc) ->
Acc;
-initialize_constraints([Constr|Rest], RecDict, ExpTypes, AllRecords, Acc) ->
+initialize_constraints([Constr|Rest], MFA, RecDict, ExpTypes, AllRecords, Acc) ->
case Constr of
{type, _, constraint, [{atom, _, is_subtype}, [Type1, Type2]]} ->
- T1 = final_form(Type1, RecDict, ExpTypes, AllRecords, dict:new()),
+ T1 = final_form(Type1, ExpTypes, MFA, AllRecords, dict:new()),
Entry = {T1, Type2},
- initialize_constraints(Rest, RecDict, ExpTypes, AllRecords, [Entry|Acc]);
+ initialize_constraints(Rest, MFA, RecDict, ExpTypes, AllRecords, [Entry|Acc]);
{type, _, constraint, [{atom,_,Name}, List]} ->
N = length(List),
throw({error,
io_lib:format("Unsupported type guard ~w/~w\n", [Name, N])})
end.
-constraints_fixpoint(Constrs, RecDict, ExpTypes, AllRecords) ->
+constraints_fixpoint(Constrs, MFA, RecDict, ExpTypes, AllRecords) ->
VarDict =
- constraints_to_dict(Constrs, RecDict, ExpTypes, AllRecords, dict:new()),
- constraints_fixpoint(VarDict, Constrs, RecDict, ExpTypes, AllRecords).
+ constraints_to_dict(Constrs, MFA, RecDict, ExpTypes, AllRecords, dict:new()),
+ constraints_fixpoint(VarDict, MFA, Constrs, RecDict, ExpTypes, AllRecords).
-constraints_fixpoint(OldVarDict, Constrs, RecDict, ExpTypes, AllRecords) ->
+constraints_fixpoint(OldVarDict, MFA, Constrs, RecDict, ExpTypes, AllRecords) ->
NewVarDict =
- constraints_to_dict(Constrs, RecDict, ExpTypes, AllRecords, OldVarDict),
+ constraints_to_dict(Constrs, MFA, RecDict, ExpTypes, AllRecords, OldVarDict),
case NewVarDict of
OldVarDict ->
DictFold =
@@ -477,25 +480,33 @@ constraints_fixpoint(OldVarDict, Constrs, RecDict, ExpTypes, AllRecords) ->
FinalConstrs = dict:fold(DictFold, [], NewVarDict),
{FinalConstrs, NewVarDict};
_Other ->
- constraints_fixpoint(NewVarDict, Constrs, RecDict, ExpTypes, AllRecords)
+ constraints_fixpoint(NewVarDict, MFA, Constrs, RecDict, ExpTypes, AllRecords)
end.
-final_form(Form, RecDict, ExpTypes, AllRecords, VarDict) ->
- T1 = erl_types:t_from_form(Form, RecDict, VarDict),
- erl_types:t_solve_remote(T1, ExpTypes, AllRecords).
+final_form(Form, ExpTypes, MFA, AllRecords, VarDict) ->
+ from_form_with_check(Form, ExpTypes, MFA, AllRecords, VarDict).
+
+from_form_with_check(Form, ExpTypes, MFA, AllRecords) ->
+ from_form_with_check(Form, ExpTypes, MFA, AllRecords, dict:new()).
+
+from_form_with_check(Form, ExpTypes, MFA, AllRecords, VarDict) ->
+ Site = {spec, MFA},
+ erl_types:t_check_record_fields(Form, ExpTypes, Site, AllRecords,
+ VarDict),
+ erl_types:t_from_form(Form, ExpTypes, Site, AllRecords, VarDict).
-constraints_to_dict(Constrs, RecDict, ExpTypes, AllRecords, VarDict) ->
+constraints_to_dict(Constrs, MFA, RecDict, ExpTypes, AllRecords, VarDict) ->
Subtypes =
- constraints_to_subs(Constrs, RecDict, ExpTypes, AllRecords, VarDict, []),
+ constraints_to_subs(Constrs, MFA, RecDict, ExpTypes, AllRecords, VarDict, []),
insert_constraints(Subtypes, dict:new()).
-constraints_to_subs([], _RecDict, _ExpTypes, _AllRecords, _VarDict, Acc) ->
+constraints_to_subs([], _MFA, _RecDict, _ExpTypes, _AllRecords, _VarDict, Acc) ->
Acc;
-constraints_to_subs([C|Rest], RecDict, ExpTypes, AllRecords, VarDict, Acc) ->
+constraints_to_subs([C|Rest], MFA, RecDict, ExpTypes, AllRecords, VarDict, Acc) ->
{T1, Form2} = C,
- T2 = final_form(Form2, RecDict, ExpTypes, AllRecords, VarDict),
+ T2 = final_form(Form2, ExpTypes, MFA, AllRecords, VarDict),
NewAcc = [{subtype, T1, T2}|Acc],
- constraints_to_subs(Rest, RecDict, ExpTypes, AllRecords, VarDict, NewAcc).
+ constraints_to_subs(Rest, MFA, RecDict, ExpTypes, AllRecords, VarDict, NewAcc).
%% Replaces variables with '_' when necessary to break up cycles among
%% the constraints.
@@ -583,7 +594,7 @@ general_domain([], AccSig) ->
-spec get_invalid_contract_warnings([module()],
dialyzer_codeserver:codeserver(),
dialyzer_plt:plt(),
- opaques_fun()) -> [dial_warning()].
+ opaques_fun()) -> [raw_warning()].
get_invalid_contract_warnings(Modules, CodeServer, Plt, FindOpaques) ->
get_invalid_contract_warnings_modules(Modules, CodeServer, Plt, FindOpaques, []).
@@ -597,7 +608,7 @@ get_invalid_contract_warnings_modules([Mod|Mods], CodeServer, Plt, FindOpaques,
get_invalid_contract_warnings_modules([], _CodeServer, _Plt, _FindOpaques, Acc) ->
Acc.
-get_invalid_contract_warnings_funs([{MFA, {FileLine, Contract}}|Left],
+get_invalid_contract_warnings_funs([{MFA, {FileLine, Contract, _Xtra}}|Left],
Plt, RecDict, FindOpaques, Acc) ->
case dialyzer_plt:lookup(Plt, MFA) of
none ->
@@ -607,16 +618,18 @@ get_invalid_contract_warnings_funs([{MFA, {FileLine, Contract}}|Left],
Sig = erl_types:t_fun(Args, Ret),
{M, _F, _A} = MFA,
Opaques = FindOpaques(M),
+ {File, Line} = FileLine,
+ WarningInfo = {File, Line, MFA},
NewAcc =
case check_contract(Contract, Sig, Opaques) of
{error, invalid_contract} ->
- [invalid_contract_warning(MFA, FileLine, Sig, RecDict)|Acc];
+ [invalid_contract_warning(MFA, WarningInfo, Sig, RecDict)|Acc];
{error, {overlapping_contract, []}} ->
- [overlapping_contract_warning(MFA, FileLine)|Acc];
+ [overlapping_contract_warning(MFA, WarningInfo)|Acc];
{error, {extra_range, ExtraRanges, STRange}} ->
Warn =
case t_from_forms_without_remote(Contract#contract.forms,
- RecDict) of
+ MFA, RecDict) of
{ok, NoRemoteType} ->
CRet = erl_types:t_fun_range(NoRemoteType),
erl_types:t_is_subtype(ExtraRanges, CRet);
@@ -625,12 +638,12 @@ get_invalid_contract_warnings_funs([{MFA, {FileLine, Contract}}|Left],
end,
case Warn of
true ->
- [extra_range_warning(MFA, FileLine, ExtraRanges, STRange)|Acc];
+ [extra_range_warning(MFA, WarningInfo, ExtraRanges, STRange)|Acc];
false ->
Acc
end;
{error, Msg} ->
- [{?WARN_CONTRACT_SYNTAX, FileLine, Msg}|Acc];
+ [{?WARN_CONTRACT_SYNTAX, WarningInfo, Msg}|Acc];
ok ->
{M, F, A} = MFA,
CSig0 = get_contract_signature(Contract),
@@ -644,14 +657,14 @@ get_invalid_contract_warnings_funs([{MFA, {FileLine, Contract}}|Left],
BifSig = erl_types:t_fun(BifArgs, BifRet),
case check_contract(Contract, BifSig, Opaques) of
{error, _} ->
- [invalid_contract_warning(MFA, FileLine, BifSig, RecDict)
+ [invalid_contract_warning(MFA, WarningInfo, BifSig, RecDict)
|Acc];
ok ->
- picky_contract_check(CSig, BifSig, MFA, FileLine,
+ picky_contract_check(CSig, BifSig, MFA, WarningInfo,
Contract, RecDict, Acc)
end;
false ->
- picky_contract_check(CSig, Sig, MFA, FileLine, Contract,
+ picky_contract_check(CSig, Sig, MFA, WarningInfo, Contract,
RecDict, Acc)
end
end,
@@ -660,20 +673,20 @@ get_invalid_contract_warnings_funs([{MFA, {FileLine, Contract}}|Left],
get_invalid_contract_warnings_funs([], _Plt, _RecDict, _FindOpaques, Acc) ->
Acc.
-invalid_contract_warning({M, F, A}, FileLine, SuccType, RecDict) ->
+invalid_contract_warning({M, F, A}, WarningInfo, SuccType, RecDict) ->
SuccTypeStr = dialyzer_utils:format_sig(SuccType, RecDict),
- {?WARN_CONTRACT_TYPES, FileLine, {invalid_contract, [M, F, A, SuccTypeStr]}}.
+ {?WARN_CONTRACT_TYPES, WarningInfo, {invalid_contract, [M, F, A, SuccTypeStr]}}.
-overlapping_contract_warning({M, F, A}, FileLine) ->
- {?WARN_CONTRACT_TYPES, FileLine, {overlapping_contract, [M, F, A]}}.
+overlapping_contract_warning({M, F, A}, WarningInfo) ->
+ {?WARN_CONTRACT_TYPES, WarningInfo, {overlapping_contract, [M, F, A]}}.
-extra_range_warning({M, F, A}, FileLine, ExtraRanges, STRange) ->
+extra_range_warning({M, F, A}, WarningInfo, ExtraRanges, STRange) ->
ERangesStr = erl_types:t_to_string(ExtraRanges),
STRangeStr = erl_types:t_to_string(STRange),
- {?WARN_CONTRACT_SUPERTYPE, FileLine,
+ {?WARN_CONTRACT_SUPERTYPE, WarningInfo,
{extra_range, [M, F, A, ERangesStr, STRangeStr]}}.
-picky_contract_check(CSig0, Sig0, MFA, FileLine, Contract, RecDict, Acc) ->
+picky_contract_check(CSig0, Sig0, MFA, WarningInfo, Contract, RecDict, Acc) ->
CSig = erl_types:t_abstract_records(CSig0, RecDict),
Sig = erl_types:t_abstract_records(Sig0, RecDict),
case erl_types:t_is_equal(CSig, Sig) of
@@ -683,7 +696,7 @@ picky_contract_check(CSig0, Sig0, MFA, FileLine, Contract, RecDict, Acc) ->
erl_types:t_is_unit(erl_types:t_fun_range(CSig))) of
true -> Acc;
false ->
- case extra_contract_warning(MFA, FileLine, Contract,
+ case extra_contract_warning(MFA, WarningInfo, Contract,
CSig0, Sig0, RecDict) of
no_warning -> Acc;
{warning, Warning} -> [Warning|Acc]
@@ -691,7 +704,7 @@ picky_contract_check(CSig0, Sig0, MFA, FileLine, Contract, RecDict, Acc) ->
end
end.
-extra_contract_warning({M, F, A}, FileLine, Contract, CSig, Sig, RecDict) ->
+extra_contract_warning(MFA, WarningInfo, Contract, CSig, Sig, RecDict) ->
%% We do not want to depend upon erl_types:t_to_string() possibly
%% hiding the contents of opaque types.
SigUnopaque = erl_types:t_unopaque(Sig),
@@ -703,11 +716,12 @@ extra_contract_warning({M, F, A}, FileLine, Contract, CSig, Sig, RecDict) ->
%% The only difference is in record fields containing 'undefined' or not.
IsUndefRecordFieldsRelated = SigString0 =:= ContractString0,
{IsRemoteTypesRelated, SubtypeRelation} =
- is_remote_types_related(Contract, CSig, Sig, RecDict),
+ is_remote_types_related(Contract, CSig, Sig, MFA, RecDict),
case IsUndefRecordFieldsRelated orelse IsRemoteTypesRelated of
true ->
no_warning;
false ->
+ {M, F, A} = MFA,
SigString = lists:flatten(dialyzer_utils:format_sig(Sig, RecDict)),
ContractString = contract_to_string(Contract),
{Tag, Msg} =
@@ -722,17 +736,18 @@ extra_contract_warning({M, F, A}, FileLine, Contract, CSig, Sig, RecDict) ->
{?WARN_CONTRACT_NOT_EQUAL,
{contract_diff, [M, F, A, ContractString, SigString]}}
end,
- {warning, {Tag, FileLine, Msg}}
+ {warning, {Tag, WarningInfo, Msg}}
end.
-is_remote_types_related(Contract, CSig, Sig, RecDict) ->
+is_remote_types_related(Contract, CSig, Sig, MFA, RecDict) ->
case erl_types:t_is_subtype(CSig, Sig) of
true ->
{false, contract_is_subtype};
false ->
case erl_types:t_is_subtype(Sig, CSig) of
true ->
- case t_from_forms_without_remote(Contract#contract.forms, RecDict) of
+ case t_from_forms_without_remote(Contract#contract.forms, MFA,
+ RecDict) of
{ok, NoRemoteTypeSig} ->
case blame_remote(CSig, NoRemoteTypeSig, Sig) of
true ->
@@ -748,14 +763,14 @@ is_remote_types_related(Contract, CSig, Sig, RecDict) ->
end
end.
-t_from_forms_without_remote([{FType, []}], RecDict) ->
- Type0 = erl_types:t_from_form(FType, RecDict),
- Type1 = erl_types:subst_all_remote(Type0, erl_types:t_none()),
+t_from_forms_without_remote([{FType, []}], MFA, RecDict) ->
+ Site = {spec, MFA},
+ Type1 = erl_types:t_from_form_without_remote(FType, Site, RecDict),
{ok, erl_types:subst_all_vars_to_any(Type1)};
-t_from_forms_without_remote([{_FType, _Constrs}], _RecDict) ->
+t_from_forms_without_remote([{_FType, _Constrs}], _MFA, _RecDict) ->
%% 'When' constraints
unsupported;
-t_from_forms_without_remote(_Forms, _RecDict) ->
+t_from_forms_without_remote(_Forms, _MFA, _RecDict) ->
%% Lots of forms
unsupported.