diff options
Diffstat (limited to 'lib/stdlib/src/erl_lint.erl')
| -rw-r--r-- | lib/stdlib/src/erl_lint.erl | 301 |
1 files changed, 69 insertions, 232 deletions
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl index 1e5f962375..642d972582 100644 --- a/lib/stdlib/src/erl_lint.erl +++ b/lib/stdlib/src/erl_lint.erl @@ -94,12 +94,9 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) -> %% the other function collections contain {Function, Arity}. -record(lint, {state=start :: 'start' | 'attribute' | 'function', module=[], %Module - package="", %Module package - extends=[], %Extends behaviour=[], %Behaviour exports=gb_sets:empty() :: gb_set(), %Exports imports=[], %Imports - mod_imports=dict:new() :: dict(), %Module Imports compile=[], %Compile flags records=dict:new() :: dict(), %Record definitions locals=gb_sets:empty() :: gb_set(), %All defined functions (prescanned) @@ -114,7 +111,6 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) -> enabled_warnings=[], %All enabled warnings (ordset). errors=[], %Current errors warnings=[], %Current warnings - global_vt=[], %The global VarTable file = "" :: string(), %From last file attribute recdef_top=false :: boolean(), %true in record initialisation %outside any fun or lc @@ -144,10 +140,8 @@ format_error({bad_module_name, M}) -> io_lib:format("bad module name '~s'", [M]); format_error(redefine_module) -> "redefining module"; -format_error(redefine_extends) -> - "redefining extends attribute"; -format_error(extends_self) -> - "cannot extend from self"; +format_error(pmod_unsupported) -> + "parameterized modules are no longer supported"; %% format_error({redefine_mod_import, M, P}) -> %% io_lib:format("module '~s' already imported from package '~s'", [M, P]); @@ -168,10 +162,6 @@ format_error({bad_inline,{F,A}}) -> io_lib:format("inlined function ~w/~w undefined", [F,A]); format_error({invalid_deprecated,D}) -> io_lib:format("badly formed deprecated attribute ~w", [D]); -format_error(invalid_extends) -> - "badly formed extends attribute"; -format_error(define_instance) -> - "defining instance function not allowed in abstract module"; format_error({bad_deprecated,{F,A}}) -> io_lib:format("deprecated function ~w/~w undefined or not exported", [F,A]); format_error({bad_nowarn_unused_function,{F,A}}) -> @@ -539,7 +529,6 @@ start(File, Opts) -> end, #lint{state = start, exports = gb_sets:from_list([{module_info,0},{module_info,1}]), - mod_imports = dict:from_list([{erlang,erlang}]), compile = Opts, %% Internal pseudo-functions must appear as defined/reached. defined = gb_sets:from_list(pseudolocals()), @@ -625,8 +614,6 @@ forms(Forms0, St0) -> pre_scan([{function,_L,new,_A,_Cs} | Fs], St) -> pre_scan(Fs, St#lint{new=true}); -pre_scan([{attribute,_L,extends,M} | Fs], St) when is_atom(M) -> - pre_scan(Fs, St#lint{extends=true}); pre_scan([{attribute,L,compile,C} | Fs], St) -> case is_warn_enabled(export_all, St) andalso member(export_all, lists:flatten([C])) of @@ -681,51 +668,15 @@ form(Form, #lint{state=State}=St) -> %% start_state(Form, State) -> State' -start_state({attribute,L,module,{M,Ps}}, St) -> - St1 = set_module(M, L, St), - Arity = length(Ps), - Ps1 = if is_atom(St1#lint.extends) -> - ['BASE', 'THIS' | Ps]; - true -> - ['THIS' | Ps] - end, - Vt = orddict:from_list([{V, {bound, used, []}} || V <- Ps1]), - St2 = add_instance(Arity, St1), - St3 = ensure_new(Arity, St2), - St3#lint{state=attribute, extends=[], global_vt=Vt}; -start_state({attribute,L,module,M}, St) -> - St1 = set_module(M, L, St), - St1#lint{state=attribute, extends=[]}; +start_state({attribute,Line,module,{_,_}}=Form, St0) -> + St1 = add_error(Line, pmod_unsupported, St0), + attribute_state(Form, St1#lint{state=attribute}); +start_state({attribute,_,module,M}, St0) -> + St1 = St0#lint{module=M}, + St1#lint{state=attribute}; start_state(Form, St) -> St1 = add_error(element(2, Form), undefined_module, St), - attribute_state(Form, St1#lint{state=attribute, extends=[]}). - -set_module(M, L, St) -> - M1 = package_to_string(M), - case packages:is_valid(M1) of - true -> - St#lint{module=list_to_atom(M1), - package=packages:strip_last(M1)}; - false -> - add_error(L, {bad_module_name, M1}, St) - end. - -ensure_new(Arity, St) -> - case St#lint.new of - true -> - St; - false -> - add_func(new, Arity, St) - end. - -add_instance(Arity, St) -> - A = Arity + (if is_atom(St#lint.extends) -> 1; true -> 0 end), - add_func(instance, A, St). - -add_func(Name, Arity, St) -> - F = {Name, Arity}, - St#lint{exports = gb_sets:add_element(F, St#lint.exports), - defined = gb_sets:add_element(F, St#lint.defined)}. + attribute_state(Form, St1#lint{state=attribute}). %% attribute_state(Form, State) -> %% State' @@ -734,15 +685,6 @@ attribute_state({attribute,_L,module,_M}, #lint{module=[]}=St) -> St; attribute_state({attribute,L,module,_M}, St) -> add_error(L, redefine_module, St); -attribute_state({attribute,L,extends,M}, #lint{module=M}=St) when is_atom(M) -> - add_error(L, extends_self, St); -attribute_state({attribute,_L,extends,M}, #lint{extends=[]}=St) - when is_atom(M) -> - St#lint{extends=M}; -attribute_state({attribute,L,extends,M}, St) when is_atom(M) -> - add_error(L, redefine_extends, St); -attribute_state({attribute,L,extends,_M}, St) -> - add_error(L, invalid_extends, St); attribute_state({attribute,L,export,Es}, St) -> export(L, Es, St); attribute_state({attribute,L,export_type,Es}, St) -> @@ -1007,9 +949,9 @@ check_imports(Forms, St0) -> true -> Usage = St0#lint.usage, Unused = ordsets:subtract(St0#lint.imports, Usage#usage.imported), - Imports = [{{FA,list_to_atom(package_to_string(Mod))},L} - || {attribute,L,import,{Mod,Fs}} <- Forms, - FA <- lists:usort(Fs)], + Imports = [{{FA,Mod},L} || + {attribute,L,import,{Mod,Fs}} <- Forms, + FA <- lists:usort(Fs)], Bad = [{FM,L} || FM <- Unused, {FM2,L} <- Imports, FM =:= FM2], func_line_warning(unused_import, Bad, St0) end. @@ -1222,73 +1164,46 @@ export_type(Line, ETs, #lint{usage = Usage, exp_types = ETs0} = St0) -> -spec import(line(), import(), lint_state()) -> lint_state(). import(Line, {Mod,Fs}, St) -> - Mod1 = package_to_string(Mod), - case packages:is_valid(Mod1) of - true -> - Mfs = ordsets:from_list(Fs), - case check_imports(Line, Mfs, St#lint.imports) of - [] -> - St#lint{imports=add_imports(list_to_atom(Mod1), Mfs, - St#lint.imports)}; - Efs -> - {Err, St1} = - foldl(fun ({bif,{F,A},_}, {Err,St0}) -> - %% BifClash - import directive - Warn = is_warn_enabled(bif_clash, St0) - and (not bif_clash_specifically_disabled(St0,{F,A})), - AutoImpSup = is_autoimport_suppressed(St0#lint.no_auto,{F,A}), - OldBif = erl_internal:old_bif(F,A), - {Err,if - Warn and (not AutoImpSup) and OldBif -> - add_error - (Line, - {redefine_old_bif_import, {F,A}}, - St0); - Warn and (not AutoImpSup) -> - add_warning - (Line, - {redefine_bif_import, {F,A}}, - St0); - true -> - St0 - end}; - (Ef, {_Err,St0}) -> - {true,add_error(Line, - {redefine_import,Ef}, - St0)} - end, - {false,St}, Efs), - if - not Err -> - St1#lint{imports= - add_imports(list_to_atom(Mod1), Mfs, + Mfs = ordsets:from_list(Fs), + case check_imports(Line, Mfs, St#lint.imports) of + [] -> + St#lint{imports=add_imports(Mod, Mfs, + St#lint.imports)}; + Efs -> + {Err, St1} = + foldl(fun ({bif,{F,A},_}, {Err,St0}) -> + %% BifClash - import directive + Warn = is_warn_enabled(bif_clash, St0) andalso + (not bif_clash_specifically_disabled(St0,{F,A})), + AutoImpSup = is_autoimport_suppressed(St0#lint.no_auto,{F,A}), + OldBif = erl_internal:old_bif(F,A), + {Err,if + Warn and (not AutoImpSup) and OldBif -> + add_error + (Line, + {redefine_old_bif_import, {F,A}}, + St0); + Warn and (not AutoImpSup) -> + add_warning + (Line, + {redefine_bif_import, {F,A}}, + St0); + true -> + St0 + end}; + (Ef, {_Err,St0}) -> + {true,add_error(Line, + {redefine_import,Ef}, + St0)} + end, + {false,St}, Efs), + if + not Err -> + St1#lint{imports=add_imports(Mod, Mfs, St#lint.imports)}; - true -> - St1 - end - end; - false -> - add_error(Line, {bad_module_name, Mod1}, St) - end; -import(Line, Mod, St) -> - Mod1 = package_to_string(Mod), - case packages:is_valid(Mod1) of - true -> - Key = list_to_atom(packages:last(Mod1)), - Imps = St#lint.mod_imports, -%%% case dict:is_key(Key, Imps) of -%%% true -> -%%% M = packages:last(Mod1), -%%% P = packages:strip_last(Mod1), -%%% add_error(Line, {redefine_mod_import, M, P}, St); -%%% false -> -%%% St#lint{mod_imports = -%%% dict:store(Key, list_to_atom(Mod1), Imps)} -%%% end; - St#lint{mod_imports = dict:store(Key, list_to_atom(Mod1), - Imps)}; - false -> - add_error(Line, {bad_module_name, Mod1}, St) + true -> + St1 + end end. check_imports(_Line, Fs, Is) -> @@ -1362,11 +1277,9 @@ call_function(Line, F, A, #lint{usage=Usage0,called=Cd,func=Func}=St) -> %% function(Line, Name, Arity, Clauses, State) -> State. -function(Line, instance, _Arity, _Cs, St) when St#lint.global_vt =/= [] -> - add_error(Line, define_instance, St); function(Line, Name, Arity, Cs, St0) -> St1 = define_function(Line, Name, Arity, St0#lint{func={Name,Arity}}), - clauses(Cs, St1#lint.global_vt, St1). + clauses(Cs, St1). -spec define_function(line(), atom(), arity(), lint_state()) -> lint_state(). @@ -1389,15 +1302,16 @@ function_check_max_args(Line, Arity, St) when Arity > ?MAX_ARGUMENTS -> add_error(Line, {too_many_arguments,Arity}, St); function_check_max_args(_, _, St) -> St. -%% clauses([Clause], VarTable, State) -> {VarTable, State}. +%% clauses([Clause], State) -> {VarTable, State}. -clauses(Cs, Vt, St) -> +clauses(Cs, St) -> foldl(fun (C, St0) -> - {_,St1} = clause(C, Vt, St0), + {_,St1} = clause(C, St0), St1 end, St, Cs). -clause({clause,_Line,H,G,B}, Vt0, St0) -> +clause({clause,_Line,H,G,B}, St0) -> + Vt0 = [], {Hvt,Binvt,St1} = head(H, Vt0, St0), %% Cannot ignore BinVt since "binsize variables" may have been used. Vt1 = vtupdate(Hvt, vtupdate(Binvt, Vt0)), @@ -1463,13 +1377,6 @@ pattern({record_index,Line,Name,Field}, _Vt, _Old, _Bvt, St) -> pattern_field(Field, Name, Dfs, St1) end), {Vt1,[],St1}; -pattern({record_field,Line,_,_}=M, _Vt, _Old, _Bvt, St0) -> - case expand_package(M, St0) of - {error, St1} -> - {[],[],add_error(Line, illegal_expr, St1)}; - {_, St1} -> - {[],[],St1} - end; pattern({record,Line,Name,Pfs}, Vt, Old, Bvt, St) -> case dict:find(Name, St#lint.records) of {ok,{_Line,Fields}} -> @@ -1851,13 +1758,6 @@ gexpr({tuple,_Line,Es}, Vt, St) -> gexpr({record_index,Line,Name,Field}, _Vt, St) -> check_record(Line, Name, St, fun (Dfs, St1) -> record_field(Field, Name, Dfs, St1) end ); -gexpr({record_field,Line,_,_}=M, _Vt, St0) -> - case expand_package(M, St0) of - {error, St1} -> - {[],add_error(Line, illegal_expr, St1)}; - {_, St1} -> - {[], St1} - end; gexpr({record_field,Line,Rec,Name,Field}, Vt, St0) -> {Rvt,St1} = gexpr(Rec, Vt, St0), {Fvt,St2} = check_record(Line, Name, St1, @@ -1996,8 +1896,6 @@ is_gexpr({tuple,_L,Es}, RDs) -> is_gexpr_list(Es, RDs); %% is_gexpr_list(Es, RDs); is_gexpr({record_index,_L,_Name,Field}, RDs) -> is_gexpr(Field, RDs); -is_gexpr({record_field,_L,_,_}=M, _RDs) -> - erl_parse:package_segments(M) =/= error; is_gexpr({record_field,_L,Rec,_Name,Field}, RDs) -> is_gexpr_list([Rec,Field], RDs); is_gexpr({record,L,Name,Inits}, RDs) -> @@ -2086,13 +1984,6 @@ expr({record,Line,Name,Inits}, Vt, St) -> fun (Dfs, St1) -> init_fields(Inits, Line, Name, Dfs, Vt, St1) end); -expr({record_field,Line,_,_}=M, _Vt, St0) -> - case expand_package(M, St0) of - {error, St1} -> - {[],add_error(Line, illegal_expr, St1)}; - {_, St1} -> - {[], St1} - end; expr({record_field,Line,Rec,Name,Field}, Vt, St0) -> {Rvt,St1} = record_expr(Line, Rec, Vt, St0), {Fvt,St2} = check_record(Line, Name, St1, @@ -2163,20 +2054,14 @@ expr({call,Line,{remote,_Lr,{atom,_Lm,erlang},{atom,Lf,is_record}},[E,A]}, expr({call,Line,{atom,Lf,is_record},[E,A]}, Vt, St0); expr({call,L,{tuple,Lt,[{atom,Lm,erlang},{atom,Lf,is_record}]},As}, Vt, St) -> expr({call,L,{remote,Lt,{atom,Lm,erlang},{atom,Lf,is_record}},As}, Vt, St); +expr({call,Line,{remote,_Lr,{atom,_Lm,M},{atom,Lf,F}},As}, Vt, St0) -> + St1 = keyword_warning(Lf, F, St0), + St2 = check_remote_function(Line, M, F, As, St1), + expr_list(As, Vt, St2); expr({call,Line,{remote,_Lr,M,F},As}, Vt, St0) -> - case expand_package(M, St0) of - {error, _} -> - expr_list([M,F|As], Vt, St0); - {{atom,_La,M1}, St1} -> - case F of - {atom,Lf,F1} -> - St2 = keyword_warning(Lf, F1, St1), - St3 = check_remote_function(Line, M1, F1, As, St2), - expr_list(As, Vt, St3); - _ -> - expr_list([F|As], Vt, St1) - end - end; + St1 = keyword_warning(Line, M, St0), + St2 = keyword_warning(Line, F, St1), + expr_list([M,F|As], Vt, St2); expr({call,Line,{atom,La,F},As}, Vt, St0) -> St1 = keyword_warning(La, F, St0), {Asvt,St2} = expr_list(As, Vt, St1), @@ -2232,13 +2117,6 @@ expr({call,Line,{atom,La,F},As}, Vt, St0) -> end end} end; -expr({call,Line,{record_field,_,_,_}=F,As}, Vt, St0) -> - case expand_package(F, St0) of - {error, _} -> - expr_list([F|As], Vt, St0); - {A, St1} -> - expr({call,Line,A,As}, Vt, St1) - end; expr({call,Line,F,As}, Vt, St0) -> St = warn_invalid_call(Line,F,St0), expr_list([F|As], Vt, St); %They see the same variables @@ -2281,9 +2159,7 @@ expr({op,_Line,_Op,L,R}, Vt, St) -> expr_list([L,R], Vt, St); %They see the same variables %% The following are not allowed to occur anywhere! expr({remote,Line,_M,_F}, _Vt, St) -> - {[],add_error(Line, illegal_expr, St)}; -expr({'query',Line,_Q}, _Vt, St) -> - {[],add_error(Line, {mnemosyne,"query"}, St)}. + {[],add_error(Line, illegal_expr, St)}. %% expr_list(Expressions, Variables, State) -> %% {UsedVarTable,State} @@ -3618,6 +3494,10 @@ extract_sequence(4, [$t, $c | Fmt], Need) -> extract_sequence(5, [$c|Fmt], Need); extract_sequence(4, [$t, $s | Fmt], Need) -> extract_sequence(5, [$s|Fmt], Need); +extract_sequence(4, [$t, $p | Fmt], Need) -> + extract_sequence(5, [$p|Fmt], Need); +extract_sequence(4, [$t, $P | Fmt], Need) -> + extract_sequence(5, [$P|Fmt], Need); extract_sequence(4, [$t, C | _Fmt], _Need) -> {error,"invalid control ~t" ++ [C]}; extract_sequence(4, Fmt, Need) -> @@ -3654,49 +3534,6 @@ control_type($n, Need) -> Need; control_type($i, Need) -> [term|Need]; control_type(_C, _Need) -> error. -%% In syntax trees, module/package names are atoms or lists of atoms. - -package_to_string(A) when is_atom(A) -> atom_to_list(A); -package_to_string(L) when is_list(L) -> packages:concat(L). - -expand_package({atom,L,A} = M, St0) -> - St1 = keyword_warning(L, A, St0), - case dict:find(A, St1#lint.mod_imports) of - {ok, A1} -> - {{atom,L,A1}, St1}; - error -> - Name = atom_to_list(A), - case packages:is_valid(Name) of - true -> - case packages:is_segmented(Name) of - true -> - {M, St1}; - false -> - M1 = packages:concat(St1#lint.package, - Name), - {{atom,L,list_to_atom(M1)}, St1} - end; - false -> - St2 = add_error(L, {bad_module_name, Name}, St1), - {error, St2} - end - end; -expand_package(M, St0) -> - L = element(2, M), - case erl_parse:package_segments(M) of - error -> - {error, St0}; - M1 -> - Name = package_to_string(M1), - case packages:is_valid(Name) of - true -> - {{atom,L,list_to_atom(Name)}, St0}; - false -> - St1 = add_error(L, {bad_module_name, Name}, St0), - {error, St1} - end - end. - %% Prebuild set of local functions (to override auto-import) local_functions(Forms) -> |