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-rw-r--r--lib/dialyzer/src/dialyzer_contracts.erl137
1 files changed, 113 insertions, 24 deletions
diff --git a/lib/dialyzer/src/dialyzer_contracts.erl b/lib/dialyzer/src/dialyzer_contracts.erl
index 3469d70a4d..8b43740e34 100644
--- a/lib/dialyzer/src/dialyzer_contracts.erl
+++ b/lib/dialyzer/src/dialyzer_contracts.erl
@@ -256,7 +256,7 @@ check_extraneous([C|Cs], SuccType) ->
check_extraneous_1(Contract, SuccType) ->
CRngs = erl_types:t_elements(erl_types:t_fun_range(Contract)),
STRng = erl_types:t_fun_range(SuccType),
- %% io:format("CR = ~p\nSR = ~p\n", [CRngs, STRng]),
+ ?debug("CR = ~p\nSR = ~p\n", [CRngs, STRng]),
case [CR || CR <- CRngs, erl_types:t_is_none(erl_types:t_inf(CR, STRng, opaque))] of
[] -> ok;
CRs -> {error, {extra_range, erl_types:t_sup(CRs), STRng}}
@@ -352,28 +352,37 @@ insert_constraints([], Dict) -> Dict.
store_tmp_contract(MFA, FileLine, TypeSpec, SpecDict, RecordsDict) ->
%% io:format("contract from form: ~p\n", [TypeSpec]),
- TmpContract = contract_from_form(TypeSpec, RecordsDict),
+ TmpContract = contract_from_form(TypeSpec, RecordsDict, FileLine),
%% io:format("contract: ~p\n", [Contract]),
dict:store(MFA, {FileLine, TmpContract}, SpecDict).
-contract_from_form(Forms, RecDict) ->
- {CFuns, Forms1} = contract_from_form(Forms, RecDict, [], []),
+contract_from_form(Forms, RecDict, FileLine) ->
+ {CFuns, Forms1} = contract_from_form(Forms, RecDict, FileLine, [], []),
#tmp_contract{contract_funs = CFuns, forms = Forms1}.
contract_from_form([{type, _, 'fun', [_, _]} = Form | Left], RecDict,
- TypeAcc, FormAcc) ->
+ FileLine, TypeAcc, FormAcc) ->
TypeFun =
fun(ExpTypes, AllRecords) ->
- Type = erl_types:t_from_form(Form, RecDict),
+ Type =
+ try
+ erl_types:t_from_form(Form, RecDict)
+ catch
+ throw:{error, Msg} ->
+ {File, Line} = FileLine,
+ NewMsg = io_lib:format("~s:~p: ~s", [filename:basename(File),
+ Line, Msg]),
+ throw({error, NewMsg})
+ end,
NewType = erl_types:t_solve_remote(Type, ExpTypes, AllRecords),
{NewType, []}
end,
NewTypeAcc = [TypeFun | TypeAcc],
NewFormAcc = [{Form, []} | FormAcc],
- contract_from_form(Left, RecDict, NewTypeAcc, NewFormAcc);
+ contract_from_form(Left, RecDict, FileLine, NewTypeAcc, NewFormAcc);
contract_from_form([{type, _L1, bounded_fun,
[{type, _L2, 'fun', [_, _]} = Form, Constr]}| Left],
- RecDict, TypeAcc, FormAcc) ->
+ RecDict, FileLine, TypeAcc, FormAcc) ->
TypeFun =
fun(ExpTypes, AllRecords) ->
Constr1 = [constraint_from_form(C, RecDict, ExpTypes, AllRecords)
@@ -385,8 +394,8 @@ contract_from_form([{type, _L1, bounded_fun,
end,
NewTypeAcc = [TypeFun | TypeAcc],
NewFormAcc = [{Form, Constr} | FormAcc],
- contract_from_form(Left, RecDict, NewTypeAcc, NewFormAcc);
-contract_from_form([], _RecDict, TypeAcc, FormAcc) ->
+ contract_from_form(Left, RecDict, FileLine, NewTypeAcc, NewFormAcc);
+contract_from_form([], _RecDict, _FileLine, TypeAcc, FormAcc) ->
{lists:reverse(TypeAcc), lists:reverse(FormAcc)}.
constraint_from_form({type, _, constraint, [{atom, _, is_subtype},
@@ -444,7 +453,21 @@ get_invalid_contract_warnings_funs([{MFA, {FileLine, Contract}}|Left],
{error, invalid_contract} ->
[invalid_contract_warning(MFA, FileLine, Sig, RecDict)|Acc];
{error, {extra_range, ExtraRanges, STRange}} ->
- [extra_range_warning(MFA, FileLine, ExtraRanges, STRange)|Acc];
+ Warn =
+ case t_from_forms_without_remote(Contract#contract.forms,
+ RecDict) of
+ {ok, NoRemoteType} ->
+ CRet = erl_types:t_fun_range(NoRemoteType),
+ erl_types:t_is_subtype(ExtraRanges, CRet);
+ unsupported ->
+ true
+ end,
+ case Warn of
+ true ->
+ [extra_range_warning(MFA, FileLine, ExtraRanges, STRange)|Acc];
+ false ->
+ Acc
+ end;
{error, Msg} ->
[{?WARN_CONTRACT_SYNTAX, FileLine, Msg}|Acc];
ok ->
@@ -507,26 +530,92 @@ picky_contract_check(CSig0, Sig0, MFA, FileLine, Contract, RecDict, Acc) ->
extra_contract_warning({M, F, A}, FileLine, Contract, CSig, Sig, RecDict) ->
SigString = lists:flatten(dialyzer_utils:format_sig(Sig, RecDict)),
ContractString0 = lists:flatten(dialyzer_utils:format_sig(CSig, RecDict)),
- case SigString =:= ContractString0 of
+ %% The only difference is in record fields containing 'undefined' or not.
+ IsUndefRecordFieldsRelated = SigString =:= ContractString0,
+ {IsRemoteTypesRelated, SubtypeRelation} =
+ is_remote_types_related(Contract, CSig, Sig, RecDict),
+ case IsUndefRecordFieldsRelated orelse IsRemoteTypesRelated of
true ->
- %% The only difference is in record fields containing 'undefined' or not.
no_warning;
false ->
ContractString = contract_to_string(Contract),
{Tag, Msg} =
- case erl_types:t_is_subtype(CSig, Sig) of
- true ->
+ case SubtypeRelation of
+ contract_is_subtype ->
{?WARN_CONTRACT_SUBTYPE,
{contract_subtype, [M, F, A, ContractString, SigString]}};
- false ->
- case erl_types:t_is_subtype(Sig, CSig) of
- true ->
- {?WARN_CONTRACT_SUPERTYPE,
- {contract_supertype, [M, F, A, ContractString, SigString]}};
- false ->
- {?WARN_CONTRACT_NOT_EQUAL,
- {contract_diff, [M, F, A, ContractString, SigString]}}
- end
+ contract_is_supertype ->
+ {?WARN_CONTRACT_SUPERTYPE,
+ {contract_supertype, [M, F, A, ContractString, SigString]}};
+ neither ->
+ {?WARN_CONTRACT_NOT_EQUAL,
+ {contract_diff, [M, F, A, ContractString, SigString]}}
end,
{warning, {Tag, FileLine, Msg}}
end.
+
+is_remote_types_related(Contract, CSig, Sig, 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
+ {ok, NoRemoteTypeSig} ->
+ case blame_remote(CSig, NoRemoteTypeSig, Sig) of
+ true ->
+ {true, neither};
+ false ->
+ {false, contract_is_supertype}
+ end;
+ unsupported ->
+ {false, contract_is_supertype}
+ end;
+ false ->
+ {false, neither}
+ end
+ end.
+
+t_from_forms_without_remote([{FType, []}], RecDict) ->
+ Type0 = erl_types:t_from_form(FType, RecDict),
+ Map =
+ fun(Type) ->
+ case erl_types:t_is_remote(Type) of
+ true -> erl_types:t_none();
+ false -> Type
+ end
+ end,
+ {ok, erl_types:t_map(Map, Type0)};
+t_from_forms_without_remote([{_FType, _Constrs}], _RecDict) ->
+ %% 'When' constraints
+ unsupported;
+t_from_forms_without_remote(_Forms, _RecDict) ->
+ %% Lots of forms
+ unsupported.
+
+blame_remote(ContractSig, NoRemoteContractSig, Sig) ->
+ CArgs = erl_types:t_fun_args(ContractSig),
+ CRange = erl_types:t_fun_range(ContractSig),
+ NRArgs = erl_types:t_fun_args(NoRemoteContractSig),
+ NRRange = erl_types:t_fun_range(NoRemoteContractSig),
+ SArgs = erl_types:t_fun_args(Sig),
+ SRange = erl_types:t_fun_range(Sig),
+ blame_remote_list([CRange|CArgs], [NRRange|NRArgs], [SRange|SArgs]).
+
+blame_remote_list([], [], []) ->
+ true;
+blame_remote_list([CArg|CArgs], [NRArg|NRArgs], [SArg|SArgs]) ->
+ case erl_types:t_is_equal(CArg, NRArg) of
+ true ->
+ case not erl_types:t_is_equal(CArg, SArg) of
+ true -> false;
+ false -> blame_remote_list(CArgs, NRArgs, SArgs)
+ end;
+ false ->
+ case erl_types:t_is_subtype(SArg, NRArg)
+ andalso not erl_types:t_is_subtype(NRArg, SArg) of
+ true -> false;
+ false -> blame_remote_list(CArgs, NRArgs, SArgs)
+ end
+ end.
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-15 18:51:16 +0000