aboutsummaryrefslogtreecommitdiffstats
path: root/lib/stdlib/src/erl_lint.erl
diff options
context:
space:
mode:
Diffstat (limited to 'lib/stdlib/src/erl_lint.erl')
-rw-r--r--lib/stdlib/src/erl_lint.erl114
1 files changed, 54 insertions, 60 deletions
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index 156d68554e..91f7641af7 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -1,20 +1,20 @@
%% -*- erlang-indent-level: 4 -*-
%%
%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 1996-2009. All Rights Reserved.
-%%
+%%
+%% Copyright Ericsson AB 1996-2010. 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/.
-%%
+%%
%% 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.
-%%
+%%
%% %CopyrightEnd%
%%
%% Do necessary checking of Erlang code.
@@ -78,7 +78,7 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) ->
calls = dict:new(), %Who calls who
imported = [], %Actually imported functions
used_records=sets:new() :: set(), %Used record definitions
- used_types = sets:new() :: set() %Used type definitions
+ used_types = dict:new() :: dict() %Used type definitions
}).
%% Define the lint state record.
@@ -277,6 +277,8 @@ format_error({conflicting_behaviours,{Name,Arity},B,FirstL,FirstB}) ->
format_error({undefined_behaviour_func, {Func,Arity}, Behaviour}) ->
io_lib:format("undefined callback function ~w/~w (behaviour '~w')",
[Func,Arity,Behaviour]);
+format_error({undefined_behaviour_func, {Func,Arity,_Spec}, Behaviour}) ->
+ format_error({undefined_behaviour_func, {Func,Arity}, Behaviour});
format_error({undefined_behaviour,Behaviour}) ->
io_lib:format("behaviour ~w undefined", [Behaviour]);
format_error({undefined_behaviour_callbacks,Behaviour}) ->
@@ -288,7 +290,7 @@ format_error({ill_defined_behaviour_callbacks,Behaviour}) ->
%% --- types and specs ---
format_error({singleton_typevar, Name}) ->
io_lib:format("type variable ~w is only used once (is unbound)", [Name]);
-format_error({type_ref, {TypeName, Arity}}) ->
+format_error({undefined_type, {TypeName, Arity}}) ->
io_lib:format("type ~w~s undefined", [TypeName, gen_type_paren(Arity)]);
format_error({unused_type, {TypeName, Arity}}) ->
io_lib:format("type ~w~s is unused", [TypeName, gen_type_paren(Arity)]);
@@ -757,10 +759,11 @@ post_traversal_check(Forms, St0) ->
St7 = check_bif_clashes(Forms, St6),
St8 = check_specs_without_function(St7),
St9 = check_functions_without_spec(Forms, St8),
- StA = check_unused_types(Forms, St9),
- StB = check_untyped_records(Forms, StA),
- StC = check_on_load(StB),
- check_unused_records(Forms, StC).
+ StA = check_undefined_types(St9),
+ StB = check_unused_types(Forms, StA),
+ StC = check_untyped_records(Forms, StB),
+ StD = check_on_load(StC),
+ check_unused_records(Forms, StD).
%% check_behaviour(State0) -> State
%% Check that the behaviour attribute is valid.
@@ -786,13 +789,20 @@ behaviour_callbacks(Line, B, St0) ->
Funcs when is_list(Funcs) ->
All = all(fun({FuncName, Arity}) ->
is_atom(FuncName) andalso is_integer(Arity);
+ ({FuncName, Arity, Spec}) ->
+ is_atom(FuncName) andalso is_integer(Arity)
+ andalso is_list(Spec);
(_Other) ->
false
end,
Funcs),
+ MaybeRemoveSpec = fun({_F,_A}=FA) -> FA;
+ ({F,A,_S}) -> {F,A};
+ (Other) -> Other
+ end,
if
All =:= true ->
- {Funcs, St0};
+ {[MaybeRemoveSpec(F) || F <- Funcs], St0};
true ->
St1 = add_warning(Line,
{ill_defined_behaviour_callbacks,B},
@@ -970,6 +980,16 @@ check_undefined_functions(#lint{called=Called0,defined=Def0}=St0) ->
add_error(L, {undefined_function,NA}, St)
end, St0, Undef).
+%% check_undefined_types(State0) -> State
+
+check_undefined_types(#lint{usage=Usage,types=Def}=St0) ->
+ Used = Usage#usage.used_types,
+ UTAs = dict:fetch_keys(Used),
+ Undef = [{TA,dict:fetch(TA, Used)} || TA <- UTAs, not dict:is_key(TA, Def)],
+ foldl(fun ({TA,L}, St) ->
+ add_error(L, {undefined_type,TA}, St)
+ end, St0, Undef).
+
%% check_bif_clashes(Forms, State0) -> State
check_bif_clashes(Forms, St0) ->
@@ -1427,20 +1447,11 @@ is_pattern_expr_1({tuple,_Line,Es}) ->
all(fun is_pattern_expr/1, Es);
is_pattern_expr_1({nil,_Line}) -> true;
is_pattern_expr_1({cons,_Line,H,T}) ->
- case is_pattern_expr_1(H) of
- true -> is_pattern_expr_1(T);
- false -> false
- end;
+ is_pattern_expr_1(H) andalso is_pattern_expr_1(T);
is_pattern_expr_1({op,_Line,Op,A}) ->
- case erl_internal:arith_op(Op, 1) of
- true -> is_pattern_expr_1(A);
- false -> false
- end;
+ erl_internal:arith_op(Op, 1) andalso is_pattern_expr_1(A);
is_pattern_expr_1({op,_Line,Op,A1,A2}) ->
- case erl_internal:arith_op(Op, 2) of
- true -> all(fun is_pattern_expr/1, [A1,A2]);
- false -> false
- end;
+ erl_internal:arith_op(Op, 2) andalso all(fun is_pattern_expr/1, [A1,A2]);
is_pattern_expr_1(_Other) -> false.
%% pattern_bin([Element], VarTable, Old, BinVarTable, State) ->
@@ -1817,28 +1828,17 @@ is_gexpr({bin,_L,Fs}, RDs) ->
end, Fs);
is_gexpr({call,_L,{atom,_Lf,F},As}, RDs) ->
A = length(As),
- case erl_internal:guard_bif(F, A) of
- true -> is_gexpr_list(As, RDs);
- false -> false
- end;
+ erl_internal:guard_bif(F, A) andalso is_gexpr_list(As, RDs);
is_gexpr({call,_L,{remote,_Lr,{atom,_Lm,erlang},{atom,_Lf,F}},As}, RDs) ->
A = length(As),
- case erl_internal:guard_bif(F, A) orelse is_gexpr_op(F, A) of
- true -> is_gexpr_list(As, RDs);
- false -> false
- end;
+ (erl_internal:guard_bif(F, A) orelse is_gexpr_op(F, A))
+ andalso is_gexpr_list(As, RDs);
is_gexpr({call,L,{tuple,Lt,[{atom,Lm,erlang},{atom,Lf,F}]},As}, RDs) ->
is_gexpr({call,L,{remote,Lt,{atom,Lm,erlang},{atom,Lf,F}},As}, RDs);
is_gexpr({op,_L,Op,A}, RDs) ->
- case is_gexpr_op(Op, 1) of
- true -> is_gexpr(A, RDs);
- false -> false
- end;
+ is_gexpr_op(Op, 1) andalso is_gexpr(A, RDs);
is_gexpr({op,_L,Op,A1,A2}, RDs) ->
- case is_gexpr_op(Op, 2) of
- true -> is_gexpr_list([A1,A2], RDs);
- false -> false
- end;
+ is_gexpr_op(Op, 2) andalso is_gexpr_list([A1,A2], RDs);
is_gexpr(_Other, _RDs) -> false.
is_gexpr_op('andalso', 2) -> true;
@@ -2388,7 +2388,7 @@ check_type(Types, St) ->
{SeenVars, St1} = check_type(Types, dict:new(), St),
dict:fold(fun(Var, {seen_once, Line}, AccSt) ->
case atom_to_list(Var) of
- [$_|_] -> AccSt;
+ "_"++_ -> AccSt;
_ -> add_error(Line, {singleton_typevar, Var}, AccSt)
end;
(_Var, seen_multiple, AccSt) ->
@@ -2400,7 +2400,7 @@ check_type({ann_type, _L, [_Var, Type]}, SeenVars, St) ->
check_type({paren_type, _L, [Type]}, SeenVars, St) ->
check_type(Type, SeenVars, St);
check_type({remote_type, L, [{atom, _, Mod}, {atom, _, Name}, Args]},
- SeenVars, St = #lint{module=CurrentMod}) ->
+ SeenVars, #lint{module=CurrentMod} = St) ->
St1 =
case (dict:is_key({Name, length(Args)}, default_types())
orelse is_var_arity_type(Name)) of
@@ -2463,21 +2463,15 @@ check_type({type, _L, product, Args}, SeenVars, St) ->
lists:foldl(fun(T, {AccSeenVars, AccSt}) ->
check_type(T, AccSeenVars, AccSt)
end, {SeenVars, St}, Args);
-check_type({type, La, TypeName, Args}, SeenVars,
- St = #lint{types=Defs, usage=Usage}) ->
+check_type({type, La, TypeName, Args}, SeenVars, #lint{usage=Usage} = St) ->
Arity = length(Args),
- St1 =
- case dict:is_key({TypeName, Arity}, Defs) of
- true ->
- UsedTypes1 = Usage#usage.used_types,
- UsedTypes2 = sets:add_element({TypeName, Arity}, UsedTypes1),
- St#lint{usage=Usage#usage{used_types=UsedTypes2}};
- false ->
- case is_var_arity_type(TypeName) of
- true -> St;
- false -> add_error(La, {type_ref, {TypeName, Arity}}, St)
- end
- end,
+ St1 = case is_var_arity_type(TypeName) of
+ true -> St;
+ false ->
+ OldUsed = Usage#usage.used_types,
+ UsedTypes = dict:store({TypeName, Arity}, La, OldUsed),
+ St#lint{usage=Usage#usage{used_types=UsedTypes}}
+ end,
check_type({type, -1, product, Args}, SeenVars, St1).
check_record_types(Line, Name, Fields, SeenVars, St) ->
@@ -2636,7 +2630,7 @@ check_specs([FunType|Left], Arity, St0) ->
check_specs([], _Arity, St) ->
St.
-check_specs_without_function(St = #lint{module=Mod, defined=Funcs}) ->
+check_specs_without_function(#lint{module=Mod,defined=Funcs,specs=Specs}=St) ->
Fun = fun({M, F, A} = MFA, Line, AccSt) when M =:= Mod ->
case gb_sets:is_element({F, A}, Funcs) of
true -> AccSt;
@@ -2644,7 +2638,7 @@ check_specs_without_function(St = #lint{module=Mod, defined=Funcs}) ->
end;
({_M, _F, _A}, _Line, AccSt) -> AccSt
end,
- dict:fold(Fun, St, St#lint.specs).
+ dict:fold(Fun, St, Specs).
%% This generates warnings for functions without specs; if the user has
%% specified both options, we do not generate the same warnings twice.
@@ -2688,7 +2682,7 @@ check_unused_types(Forms, St = #lint{usage=Usage, types=Types}) ->
(Type, FileLine, AccSt) ->
case loc(FileLine) of
{FirstFile, _} ->
- case sets:is_element(Type, UsedTypes) of
+ case dict:is_key(Type, UsedTypes) of
true -> AccSt;
false ->
add_warning(FileLine,
@@ -3009,7 +3003,7 @@ check_old_unused_vars(Vt, Vt0, St0) ->
unused_vars(Vt, Vt0, _St0) ->
U0 = orddict:filter(fun (V, {_State,unused,_Ls}) ->
case atom_to_list(V) of
- [$_|_] -> false;
+ "_"++_ -> false;
_ -> true
end;
(_V, _How) -> false
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 15:47:19 +0000