diff options
Diffstat (limited to 'lib')
3 files changed, 361 insertions, 16 deletions
diff --git a/lib/dialyzer/src/dialyzer_contracts.erl b/lib/dialyzer/src/dialyzer_contracts.erl index 2b78b736ab..76f23d00b9 100644 --- a/lib/dialyzer/src/dialyzer_contracts.erl +++ b/lib/dialyzer/src/dialyzer_contracts.erl @@ -344,7 +344,7 @@ insert_constraints([{subtype, Type1, Type2}|Left], Dict) -> false -> %% A lot of things should change to add supertypes throw({error, io_lib:format("First argument of is_subtype constraint " - "must be a type variable\n", [])}) + "must be a type variable: ~p\n", [Type1])}) end; insert_constraints([], Dict) -> Dict. @@ -385,9 +385,8 @@ contract_from_form([{type, _L1, bounded_fun, RecDict, FileLine, TypeAcc, FormAcc) -> TypeFun = fun(ExpTypes, AllRecords) -> - Constr1 = [constraint_from_form(C, RecDict, ExpTypes, AllRecords) - || C <- Constr], - VarDict = insert_constraints(Constr1, dict:new()), + {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), {NewType, Constr1} @@ -398,18 +397,66 @@ contract_from_form([{type, _L1, bounded_fun, contract_from_form([], _RecDict, _FileLine, TypeAcc, FormAcc) -> {lists:reverse(TypeAcc), lists:reverse(FormAcc)}. -constraint_from_form({type, _, constraint, [{atom, _, is_subtype}, - [Type1, Type2]]}, RecDict, - ExpTypes, AllRecords) -> - T1 = erl_types:t_from_form(Type1, RecDict), - T2 = erl_types:t_from_form(Type2, RecDict), - T3 = erl_types:t_solve_remote(T1, ExpTypes, AllRecords), - T4 = erl_types:t_solve_remote(T2, ExpTypes, AllRecords), - {subtype, T3, T4}; -constraint_from_form({type, _, constraint, [{atom,_,Name}, List]}, _RecDict, - _ExpTypes, _AllRecords) -> - N = length(List), - throw({error, io_lib:format("Unsupported type guard ~w/~w\n", [Name, N])}). +process_constraints(Constrs, RecDict, ExpTypes, AllRecords) -> + Init = initialize_constraints(Constrs, RecDict, ExpTypes, AllRecords), + constraints_fixpoint(Init, RecDict, ExpTypes, AllRecords). + +initialize_constraints(Constrs, RecDict, ExpTypes, AllRecords) -> + initialize_constraints(Constrs, RecDict, ExpTypes, AllRecords, []). + +initialize_constraints([], _RecDict, _ExpTypes, _AllRecords, Acc) -> + Acc; +initialize_constraints([Constr|Rest], RecDict, ExpTypes, AllRecords, Acc) -> + case Constr of + {type, _, constraint, [{atom, _, is_subtype}, [Type1, Type2]]} -> + T1 = final_form(Type1, RecDict, ExpTypes, AllRecords, dict:new()), + Entry = {T1, Type2}, + initialize_constraints(Rest, 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) -> + VarDict = + constraints_to_dict(Constrs, RecDict, ExpTypes, AllRecords, dict:new()), + constraints_fixpoint(VarDict, Constrs, RecDict, ExpTypes, AllRecords). + +constraints_fixpoint(OldVarDict, Constrs, RecDict, ExpTypes, AllRecords) -> + NewVarDict = + constraints_to_dict(Constrs, RecDict, ExpTypes, AllRecords, OldVarDict), + case NewVarDict of + OldVarDict -> + DictFold = + fun(Key, Value, Acc) -> + [{subtype, erl_types:t_var(Key), Value}|Acc] + end, + FinalConstrs = dict:fold(DictFold, [], NewVarDict), + {FinalConstrs, NewVarDict}; + _Other -> + constraints_fixpoint(NewVarDict, Constrs, RecDict, ExpTypes, AllRecords) + end. + +-define(TYPE_LIMIT, 4). + +final_form(Form, RecDict, ExpTypes, AllRecords, VarDict) -> + T1 = erl_types:t_from_form(Form, RecDict, VarDict), + T2 = erl_types:t_solve_remote(T1, ExpTypes, AllRecords), + erl_types:t_limit(T2, ?TYPE_LIMIT). + +constraints_to_dict(Constrs, RecDict, ExpTypes, AllRecords, VarDict) -> + Subtypes = + constraints_to_subs(Constrs, RecDict, ExpTypes, AllRecords, VarDict, []), + insert_constraints(Subtypes, dict:new()). + +constraints_to_subs([], _RecDict, _ExpTypes, _AllRecords, _VarDict, Acc) -> + Acc; +constraints_to_subs([C|Rest], RecDict, ExpTypes, AllRecords, VarDict, Acc) -> + {T1, Form2} = C, + T2 = final_form(Form2, RecDict, ExpTypes, AllRecords, VarDict), + NewAcc = [{subtype, T1, T2}|Acc], + constraints_to_subs(Rest, RecDict, ExpTypes, AllRecords, VarDict, NewAcc). %% Gets the most general domain of a list of domains of all %% the overloaded contracts diff --git a/lib/dialyzer/test/small_SUITE_data/results/contracts_with_subtypes b/lib/dialyzer/test/small_SUITE_data/results/contracts_with_subtypes new file mode 100644 index 0000000000..8dc0361b0d --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/results/contracts_with_subtypes @@ -0,0 +1,31 @@ + +contracts_with_subtypes.erl:106: The call contracts_with_subtypes:rec_arg({'a','b'}) breaks the contract (Arg) -> 'ok' when is_subtype(Arg,{'a',A} | {'b',B}), is_subtype(A,'a' | {'b',B}), is_subtype(B,'b' | {'a',A}) +contracts_with_subtypes.erl:107: The call contracts_with_subtypes:rec_arg({'b','a'}) breaks the contract (Arg) -> 'ok' when is_subtype(Arg,{'a',A} | {'b',B}), is_subtype(A,'a' | {'b',B}), is_subtype(B,'b' | {'a',A}) +contracts_with_subtypes.erl:108: The call contracts_with_subtypes:rec_arg({'a',{'b','a'}}) breaks the contract (Arg) -> 'ok' when is_subtype(Arg,{'a',A} | {'b',B}), is_subtype(A,'a' | {'b',B}), is_subtype(B,'b' | {'a',A}) +contracts_with_subtypes.erl:109: The call contracts_with_subtypes:rec_arg({'b',{'a','b'}}) breaks the contract (Arg) -> 'ok' when is_subtype(Arg,{'a',A} | {'b',B}), is_subtype(A,'a' | {'b',B}), is_subtype(B,'b' | {'a',A}) +contracts_with_subtypes.erl:110: The call contracts_with_subtypes:rec_arg({'a',{'b',{'a','b'}}}) breaks the contract (Arg) -> 'ok' when is_subtype(Arg,{'a',A} | {'b',B}), is_subtype(A,'a' | {'b',B}), is_subtype(B,'b' | {'a',A}) +contracts_with_subtypes.erl:111: The call contracts_with_subtypes:rec_arg({'b',{'a',{'b','a'}}}) breaks the contract (Arg) -> 'ok' when is_subtype(Arg,{'a',A} | {'b',B}), is_subtype(A,'a' | {'b',B}), is_subtype(B,'b' | {'a',A}) +contracts_with_subtypes.erl:142: The pattern 1 can never match the type binary() | string() +contracts_with_subtypes.erl:145: The pattern 'alpha' can never match the type {'ok',X} | {'ok',X,binary() | string()} +contracts_with_subtypes.erl:147: The pattern 42 can never match the type {'ok',_} | {'ok',_,binary() | string()} +contracts_with_subtypes.erl:163: The pattern 'alpha' can never match the type {'ok',X} +contracts_with_subtypes.erl:165: The pattern 42 can never match the type {'ok',X} +contracts_with_subtypes.erl:183: The pattern 'alpha' can never match the type {'ok',X} +contracts_with_subtypes.erl:185: The pattern 42 can never match the type {'ok',X} +contracts_with_subtypes.erl:202: The pattern 1 can never match the type binary() | string() +contracts_with_subtypes.erl:205: The pattern {'ok', _} can never match the type {'ok',X,binary() | string()} +contracts_with_subtypes.erl:206: The pattern 'alpha' can never match the type {'ok',X,binary() | string()} +contracts_with_subtypes.erl:207: The pattern {'ok', 42} can never match the type {'ok',X,binary() | string()} +contracts_with_subtypes.erl:208: The pattern 42 can never match the type {'ok',X,binary() | string()} +contracts_with_subtypes.erl:234: Function flat_ets_new_t/0 has no local return +contracts_with_subtypes.erl:235: The call contracts_with_subtypes:flat_ets_new(12,[]) breaks the contract (Name,Options) -> atom() when is_subtype(Name,atom()), is_subtype(Options,[Option]), is_subtype(Option,'set' | 'ordered_set' | 'bag' | 'duplicate_bag' | 'public' | 'protected' | 'private' | 'named_table' | {'keypos',integer()} | {'heir',pid(),term()} | {'heir','none'} | {'write_concurrency',boolean()} | {'read_concurrency',boolean()} | 'compressed') +contracts_with_subtypes.erl:23: Invalid type specification for function contracts_with_subtypes:extract2/0. The success typing is () -> 'something' +contracts_with_subtypes.erl:261: Function factored_ets_new_t/0 has no local return +contracts_with_subtypes.erl:262: The call contracts_with_subtypes:factored_ets_new(12,[]) breaks the contract (Name,Options) -> atom() when is_subtype(Name,atom()), is_subtype(Options,[Option]), is_subtype(Option,Type | Access | 'named_table' | {'keypos',Pos} | {'heir',Pid::pid(),HeirData} | {'heir','none'} | Tweaks), is_subtype(Type,type()), is_subtype(Access,access()), is_subtype(Tweaks,{'write_concurrency',boolean()} | {'read_concurrency',boolean()} | 'compressed'), is_subtype(Pos,pos_integer()), is_subtype(HeirData,term()) +contracts_with_subtypes.erl:77: The call contracts_with_subtypes:foo1(5) breaks the contract (Arg1) -> Res when is_subtype(Arg1,atom()), is_subtype(Res,atom()) +contracts_with_subtypes.erl:78: The call contracts_with_subtypes:foo2(5) breaks the contract (Arg1) -> Res when is_subtype(Arg1,Arg2), is_subtype(Arg2,atom()), is_subtype(Res,atom()) +contracts_with_subtypes.erl:79: The call contracts_with_subtypes:foo3(5) breaks the contract (Arg1) -> Res when is_subtype(Arg2,atom()), is_subtype(Arg1,Arg2), is_subtype(Res,atom()) +contracts_with_subtypes.erl:7: Invalid type specification for function contracts_with_subtypes:extract/0. The success typing is () -> 'something' +contracts_with_subtypes.erl:80: The call contracts_with_subtypes:foo4(5) breaks the contract (Type) -> Type when is_subtype(Type,atom()) +contracts_with_subtypes.erl:81: The call contracts_with_subtypes:foo5(5) breaks the contract (Type::atom()) -> Type::atom() +contracts_with_subtypes.erl:82: The call contracts_with_subtypes:foo6(5) breaks the contract (Type) -> Type when is_subtype(Type,atom()) diff --git a/lib/dialyzer/test/small_SUITE_data/src/contracts_with_subtypes.erl b/lib/dialyzer/test/small_SUITE_data/src/contracts_with_subtypes.erl new file mode 100644 index 0000000000..d72138d509 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/contracts_with_subtypes.erl @@ -0,0 +1,267 @@ +-module(contracts_with_subtypes). + +-compile(export_all). + +%=============================================================================== + +-spec extract() -> 'ok'. + +extract() -> + case dz_extract() of + {ok, Val} -> Val; + error -> exit(boom) + end. + +-spec dz_extract() -> RetValue when + FileList :: something, + RetValue :: {ok, FileList} | error. + +dz_extract() -> get(foo). + +%------------------------------------------------------------------------------- + +-spec extract2() -> 'ok'. + +extract2() -> + case dz_extract2() of + {ok, Val} -> Val; + error -> exit(boom) + end. + +-spec dz_extract2() -> RetValue when + RetValue :: {ok, FileList} | error, + FileList :: something. + +dz_extract2() -> get(foo). + +%=============================================================================== + +-spec foo1(Arg1) -> Res when + Arg1 :: atom(), + Res :: atom(). + +foo1(X) -> X. + +-spec foo2(Arg1) -> Res when + Arg1 :: Arg2, + Arg2 :: atom(), + Res :: atom(). + +foo2(X) -> X. + +-spec foo3(Arg1) -> Res when + Arg2 :: atom(), + Arg1 :: Arg2, + Res :: atom(). + +foo3(X) -> X. + +-spec foo4(Type) -> Type when is_subtype(Type, atom()). + +foo4(X) -> X. + +-spec foo5(Type :: atom()) -> Type :: atom(). + +foo5(X) -> X. + +-spec foo6(Type) -> Type when Type :: atom(). + +foo6(X) -> X. + +-spec foo7(Type) -> Type. + +foo7(X) -> X. + +%------------------------------------------------------------------------------- + +bar(1) -> foo1(5); +bar(2) -> foo2(5); +bar(3) -> foo3(5); +bar(4) -> foo4(5); +bar(5) -> foo5(5); +bar(6) -> foo6(5); +bar(7) -> foo7(5). + +wrong_foo6() -> + b = foo6(a). + +%=============================================================================== + +-spec rec_arg(Arg) -> ok when + Arg :: {a, A} | {b, B}, + A :: a | {b, B}, + B :: b | {a, A}. + +rec_arg(X) -> get(X). + +c(aa) -> rec_arg({a, a}); +c(bb) -> rec_arg({b, b}); +c(abb) -> rec_arg({a, {b, b}}); +c(baa) -> rec_arg({b, {a, a}}); +c(abaa) -> rec_arg({a, {b, {a, a}}}); +c(babb) -> rec_arg({b, {a, {b, b}}}); +c(ababb) -> rec_arg({a, {b, {a, {b, b}}}}); +c(babaa) -> rec_arg({b, {a, {b, {a, a}}}}). + +w(ab) -> rec_arg({a, b}); +w(ba) -> rec_arg({b, a}); +w(aba) -> rec_arg({a, {b, a}}); +w(bab) -> rec_arg({b, {a, b}}); +w(abab) -> rec_arg({a, {b, {a, b}}}); +w(baba) -> rec_arg({b, {a, {b, a}}}); +w(ababa) -> rec_arg({a, {b, {a, {b, a}}}}); +w(babab) -> rec_arg({b, {a, {b, {a, b}}}}). + +%=============================================================================== + +-type dublo(X) :: {X, X}. + +-type weird(X,Y) :: {X, Y, X, X}. + +-spec forfun(dublo(Var)) -> ok when Var :: atom(). + +forfun(_) -> ok. + +-spec forfun2(weird(Var, Var)) -> ok when Var :: atom(). + +forfun2(_) -> ok. + +%=============================================================================== + +-spec shallow(X) -> {ok, X} | {ok, X, file:filename()} | err1 | err2. + +shallow(X) -> get(X). + +st(X) when is_atom(X) -> + case shallow(X) of + err1 -> ok; + err2 -> ok; + {ok, X} -> ok; + {ok, X, Res} -> + case Res of + 1 -> bad; + _Other -> ok + end; + alpha -> bad; + {ok, 42} -> bad; + 42 -> bad + end. + +%------------------------------------------------------------------------------- + +-spec deep(X) -> Ret when + Ret :: {ok, X} | Err, + Err :: err1 | err2. + +deep(X) -> get(X). + +dt(X) when is_atom(X) -> + case deep(X) of + err1 -> ok; + err2 -> ok; + {ok, X} -> ok; + alpha -> bad; + {ok, 42} -> bad; + 42 -> bad + end. + +%------------------------------------------------------------------------------- + +-type local_errors() :: err1 | err2. + +-spec deep2(X) -> Ret when + Ret :: {ok, X} | Err, + Err :: local_errors(). + +deep2(X) -> get(X). + +dt2(X) when is_atom(X) -> + case deep2(X) of + err1 -> ok; + err2 -> ok; + {ok, X} -> ok; + alpha -> bad; + {ok, 42} -> bad; + 42 -> bad + end. + +%------------------------------------------------------------------------------- + +-spec deep3(X) -> Ret when + Ret :: {ok, X, file:filename()} | Err, + Err :: local_errors(). + +deep3(X) -> get(X). + +dt3(X) when is_atom(X) -> + case deep3(X) of + err1 -> ok; + err2 -> ok; + {ok, X, Res} -> + case Res of + 1 -> bad; + _Other -> ok + end; + {ok, X} -> bad; + alpha -> bad; + {ok, 42} -> bad; + 42 -> bad + end. + +%=============================================================================== + +-spec flat_ets_new(Name, Options) -> atom() when + Name :: atom(), + Options :: [Option], + Option :: set + | ordered_set + | bag + | duplicate_bag + | public + | protected + | private + | named_table + | {keypos, integer()} + | {heir, pid(), term()} + | {heir, none} + | {write_concurrency, boolean()} + | {read_concurrency, boolean()} + | compressed. + +flat_ets_new(Name, Options) -> + get({Name, Options}). + +flat_ets_new_t() -> + flat_ets_new(12,[]), + flat_ets_new({a,b},[]), + flat_ets_new(name,[foo]), + flat_ets_new(name,{bag}), + flat_ets_new(name,bag), + ok. + +-type access() :: public | protected | private. +-type type() :: set | ordered_set | bag | duplicate_bag. + +-spec factored_ets_new(Name, Options) -> atom() when + Name :: atom(), + Options :: [Option], + Option :: Type | Access | named_table | {keypos,Pos} + | {heir, Pid :: pid(), HeirData} | {heir, none} | Tweaks, + Type :: type(), + Access :: access(), + Tweaks :: {write_concurrency, boolean()} + | {read_concurrency, boolean()} + | compressed, + Pos :: pos_integer(), + HeirData :: term(). + +factored_ets_new(Name, Options) -> + get({Name, Options}). + +factored_ets_new_t() -> + factored_ets_new(12,[]), + factored_ets_new({a,b},[]), + factored_ets_new(name,[foo]), + factored_ets_new(name,{bag}), + factored_ets_new(name,bag), + ok. |