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-rw-r--r--lib/stdlib/src/erl_lint.erl63
1 files changed, 52 insertions, 11 deletions
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index dd0b9bc2ab..e5adb84932 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -123,6 +123,7 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) ->
called= [] :: [{fa(),line()}], %Called functions
usage = #usage{} :: #usage{},
specs = dict:new() :: dict(), %Type specifications
+ callbacks = dict:new() :: dict(), %Callback types
types = dict:new() :: dict(), %Type definitions
exp_types=gb_sets:empty():: gb_set() %Exported types
}).
@@ -310,8 +311,6 @@ 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}) ->
@@ -320,6 +319,9 @@ format_error({undefined_behaviour_callbacks,Behaviour}) ->
format_error({ill_defined_behaviour_callbacks,Behaviour}) ->
io_lib:format("behaviour ~w callback functions erroneously defined",
[Behaviour]);
+format_error({behaviour_info, {_M,F,A}}) ->
+ io_lib:format("cannot define callback attibute for ~w/~w when "
+ "behaviour_info is defined",[F,A]);
%% --- types and specs ---
format_error({singleton_typevar, Name}) ->
io_lib:format("type variable ~w is only used once (is unbound)", [Name]);
@@ -348,12 +350,16 @@ format_error({type_syntax, Constr}) ->
io_lib:format("bad ~w type", [Constr]);
format_error({redefine_spec, {M, F, A}}) ->
io_lib:format("spec for ~w:~w/~w already defined", [M, F, A]);
+format_error({redefine_callback, {M, F, A}}) ->
+ io_lib:format("callback ~w:~w/~w already defined", [M, F, A]);
format_error({spec_fun_undefined, {M, F, A}}) ->
io_lib:format("spec for undefined function ~w:~w/~w", [M, F, A]);
format_error({missing_spec, {F,A}}) ->
io_lib:format("missing specification for function ~w/~w", [F, A]);
format_error(spec_wrong_arity) ->
"spec has the wrong arity";
+format_error(callback_wrong_arity) ->
+ "callback has the wrong arity";
format_error({imported_predefined_type, Name}) ->
io_lib:format("referring to built-in type ~w as a remote type; "
"please take out the module name", [Name]);
@@ -747,6 +753,8 @@ attribute_state({attribute,L,opaque,{TypeName,TypeDef,Args}}, St) ->
type_def(opaque, L, TypeName, TypeDef, Args, St);
attribute_state({attribute,L,spec,{Fun,Types}}, St) ->
spec_decl(L, Fun, Types, St);
+attribute_state({attribute,L,callback,{Fun,Types}}, St) ->
+ callback_decl(L, Fun, Types, St);
attribute_state({attribute,L,on_load,Val}, St) ->
on_load(L, Val, St);
attribute_state({attribute,_L,_Other,_Val}, St) -> % Ignore others
@@ -840,7 +848,8 @@ post_traversal_check(Forms, St0) ->
StB = check_unused_types(Forms, StA),
StC = check_untyped_records(Forms, StB),
StD = check_on_load(StC),
- check_unused_records(Forms, StD).
+ StE = check_unused_records(Forms, StD),
+ check_callback_information(StE).
%% check_behaviour(State0) -> State
%% Check that the behaviour attribute is valid.
@@ -1139,6 +1148,23 @@ check_unused_records(Forms, St0) ->
St0
end.
+check_callback_information(#lint{callbacks = Callbacks,
+ defined = Defined} = State) ->
+ case gb_sets:is_member({behaviour_info,1}, Defined) of
+ false -> State;
+ true ->
+ case dict:size(Callbacks) of
+ 0 -> State;
+ _ ->
+ CallbacksList = dict:to_list(Callbacks),
+ FoldL =
+ fun({Fa,Line},St) ->
+ add_error(Line, {behaviour_info, Fa}, St)
+ end,
+ lists:foldl(FoldL, State, CallbacksList)
+ end
+ end.
+
%% For storing the import list we use the orddict module.
%% We know an empty set is [].
@@ -2101,8 +2127,13 @@ expr({'fun',Line,Body}, Vt, St) ->
true -> {[],St};
false -> {[],call_function(Line, F, A, St)}
end;
- {function,_M,_F,_A} ->
- {[],St}
+ {function,M,F,A} when is_atom(M), is_atom(F), is_integer(A) ->
+ %% Compatibility with pre-R15 abstract format.
+ {[],St};
+ {function,M,F,A} ->
+ %% New in R15.
+ {Bvt, St1} = expr_list([M,F,A], Vt, St),
+ {vtupdate(Bvt, Vt),St1}
end;
expr({call,_Line,{atom,_Lr,is_record},[E,{atom,Ln,Name}]}, Vt, St0) ->
{Rvt,St1} = expr(E, Vt, St0),
@@ -2736,12 +2767,6 @@ default_types() ->
{var, 1}],
dict:from_list([{T, -1} || T <- DefTypes]).
-%% R12B-5
-is_newly_introduced_builtin_type({module, 0}) -> true;
-is_newly_introduced_builtin_type({node, 0}) -> true;
-is_newly_introduced_builtin_type({nonempty_string, 0}) -> true;
-is_newly_introduced_builtin_type({term, 0}) -> true;
-is_newly_introduced_builtin_type({timeout, 0}) -> true;
%% R13
is_newly_introduced_builtin_type({arity, 0}) -> true;
is_newly_introduced_builtin_type({array, 0}) -> true; % opaque
@@ -2770,6 +2795,20 @@ spec_decl(Line, MFA0, TypeSpecs, St0 = #lint{specs = Specs, module = Mod}) ->
false -> check_specs(TypeSpecs, Arity, St1)
end.
+%% callback_decl(Line, Fun, Types, State) -> State.
+
+callback_decl(Line, MFA0, TypeSpecs,
+ St0 = #lint{callbacks = Callbacks, module = Mod}) ->
+ MFA = case MFA0 of
+ {F, Arity} -> {Mod, F, Arity};
+ {_M, _F, Arity} -> MFA0
+ end,
+ St1 = St0#lint{callbacks = dict:store(MFA, Line, Callbacks)},
+ case dict:is_key(MFA, Callbacks) of
+ true -> add_error(Line, {redefine_callback, MFA}, St1);
+ false -> check_specs(TypeSpecs, Arity, St1)
+ end.
+
check_specs([FunType|Left], Arity, St0) ->
{FunType1, CTypes} =
case FunType of
@@ -3275,6 +3314,8 @@ modify_line1({attribute,L,record,{Name,Fields}}, Mf) ->
{attribute,Mf(L),record,{Name,modify_line1(Fields, Mf)}};
modify_line1({attribute,L,spec,{Fun,Types}}, Mf) ->
{attribute,Mf(L),spec,{Fun,modify_line1(Types, Mf)}};
+modify_line1({attribute,L,callback,{Fun,Types}}, Mf) ->
+ {attribute,Mf(L),callback,{Fun,modify_line1(Types, Mf)}};
modify_line1({attribute,L,type,{TypeName,TypeDef,Args}}, Mf) ->
{attribute,Mf(L),type,{TypeName,modify_line1(TypeDef, Mf),
modify_line1(Args, Mf)}};
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 15:40:54 +0000