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-rw-r--r--lib/stdlib/src/erl_lint.erl74
1 files changed, 53 insertions, 21 deletions
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index 229d455e06..6bbb52ebae 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -40,7 +40,7 @@
%% Value.
%% The option handling functions.
--spec bool_option(atom(), atom(), boolean(), [_]) -> boolean().
+-spec bool_option(atom(), atom(), boolean(), [compile:option()]) -> boolean().
bool_option(On, Off, Default, Opts) ->
foldl(fun (Opt, _Def) when Opt =:= On -> true;
@@ -72,6 +72,10 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) ->
%%-define(DEBUGF(X,Y), io:format(X, Y)).
-define(DEBUGF(X,Y), void).
+-type line() :: erl_scan:line(). % a convenient alias
+-type fa() :: {atom(), arity()}. % function+arity
+-type ta() :: {atom(), arity()}. % type+arity
+
%% Usage of records, functions, and imports. The variable table, which
%% is passed on as an argument, holds the usage of variables.
-record(usage, {
@@ -97,8 +101,8 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) ->
locals=gb_sets:empty() :: gb_set(), %All defined functions (prescanned)
no_auto=gb_sets:empty() :: gb_set(), %Functions explicitly not autoimported
defined=gb_sets:empty() :: gb_set(), %Defined fuctions
- on_load=[] :: [{atom(),integer()}], %On-load function
- on_load_line=0 :: integer(), %Line for on_load
+ on_load=[] :: [fa()], %On-load function
+ on_load_line=0 :: line(), %Line for on_load
clashes=[], %Exported functions named as BIFs
not_deprecated=[], %Not considered deprecated
func=[], %Current function
@@ -112,13 +116,14 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) ->
%outside any fun or lc
xqlc= false :: boolean(), %true if qlc.hrl included
new = false :: boolean(), %Has user-defined 'new/N'
- called= [], %Called functions
+ called= [] :: [{fa(),line()}], %Called functions
usage = #usage{} :: #usage{},
specs = dict:new() :: dict(), %Type specifications
- types = dict:new() :: dict() %Type definitions
+ types = dict:new() :: dict(), %Type definitions
+ exp_types=gb_sets:empty():: gb_set() %Exported types
}).
-%% -type lint_state() :: #lint{}.
+-type lint_state() :: #lint{}.
%% format_error(Error)
%% Return a string describing the error.
@@ -303,6 +308,8 @@ 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({duplicated_export_type, {T, A}}) ->
+ io_lib:format("type ~w/~w already exported", [T, A]);
format_error({undefined_type, {TypeName, Arity}}) ->
io_lib:format("type ~w~s undefined", [TypeName, gen_type_paren(Arity)]);
format_error({unused_type, {TypeName, Arity}}) ->
@@ -684,6 +691,8 @@ 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) ->
+ export_type(L, Es, St);
attribute_state({attribute,L,import,Is}, St) ->
import(L, Is, St);
attribute_state({attribute,L,record,{Name,Fields}}, St) ->
@@ -1093,7 +1102,7 @@ check_unused_records(Forms, St0) ->
%% For storing the import list we use the orddict module.
%% We know an empty set is [].
-%% export(Line, Exports, State) -> State.
+-spec export(line(), [fa()], lint_state()) -> lint_state().
%% Mark functions as exported, also as called from the export line.
export(Line, Es, #lint{exports = Es0, called = Called} = St0) ->
@@ -1101,7 +1110,8 @@ export(Line, Es, #lint{exports = Es0, called = Called} = St0) ->
foldl(fun (NA, {E,C,St2}) ->
St = case gb_sets:is_element(NA, E) of
true ->
- add_warning(Line, {duplicated_export, NA}, St2);
+ Warn = {duplicated_export,NA},
+ add_warning(Line, Warn, St2);
false ->
St2
end,
@@ -1110,8 +1120,27 @@ export(Line, Es, #lint{exports = Es0, called = Called} = St0) ->
{Es0,Called,St0}, Es),
St1#lint{exports = Es1, called = C1}.
-%% import(Line, Imports, State) -> State.
-%% imported(Name, Arity, State) -> {yes,Module} | no.
+-spec export_type(line(), [ta()], lint_state()) -> lint_state().
+%% Mark types as exported; also mark them as used from the export line.
+
+export_type(Line, ETs, #lint{usage = Usage, exp_types = ETs0} = St0) ->
+ UTs0 = Usage#usage.used_types,
+ {ETs1,UTs1,St1} =
+ foldl(fun (TA, {E,U,St2}) ->
+ St = case gb_sets:is_element(TA, E) of
+ true ->
+ Warn = {duplicated_export_type,TA},
+ add_warning(Line, Warn, St2);
+ false ->
+ St2
+ end,
+ {gb_sets:add_element(TA, E), dict:store(TA, Line, U), St}
+ end,
+ {ETs0,UTs0,St0}, ETs),
+ St1#lint{usage = Usage#usage{used_types = UTs1}, exp_types = ETs1}.
+
+-type import() :: {module(), [fa()]} | module().
+-spec import(line(), import(), lint_state()) -> lint_state().
import(Line, {Mod,Fs}, St) ->
Mod1 = package_to_string(Mod),
@@ -1200,13 +1229,15 @@ check_imports(_Line, Fs, Is) ->
add_imports(Mod, Fs, Is) ->
foldl(fun (F, Is0) -> orddict:store(F, Mod, Is0) end, Is, Fs).
+-spec imported(atom(), arity(), lint_state()) -> {'yes',module()} | 'no'.
+
imported(F, A, St) ->
case orddict:find({F,A}, St#lint.imports) of
{ok,Mod} -> {yes,Mod};
error -> no
end.
-%% on_load(Line, Val, State) -> State.
+-spec on_load(line(), fa(), lint_state()) -> lint_state().
%% Check an on_load directive and remember it.
on_load(Line, {Name,Arity}=Fa, #lint{on_load=OnLoad0}=St0)
@@ -1238,7 +1269,7 @@ check_on_load(#lint{defined=Defined,on_load=[{_,0}=Fa],
end;
check_on_load(St) -> St.
-%% call_function(Line, Name, Arity, State) -> State.
+-spec call_function(line(), atom(), arity(), lint_state()) -> lint_state().
%% Add to both called and calls.
call_function(Line, F, A, #lint{usage=Usage0,called=Cd,func=Func}=St) ->
@@ -1258,7 +1289,7 @@ function(Line, Name, Arity, Cs, St0) ->
St1 = define_function(Line, Name, Arity, St0#lint{func={Name,Arity}}),
clauses(Cs, St1#lint.global_vt, St1).
-%% define_function(Line, Name, Arity, State) -> State.
+-spec define_function(line(), atom(), arity(), lint_state()) -> lint_state().
define_function(Line, Name, Arity, St0) ->
St1 = keyword_warning(Line, Name, St0),
@@ -2744,10 +2775,12 @@ add_missing_spec_warnings(Forms, St0, Type) ->
add_warning(L, {missing_spec,FA}, St)
end, St0, Warns).
-check_unused_types(Forms, St = #lint{usage=Usage, types=Types}) ->
+check_unused_types(Forms, #lint{usage=Usage, types=Ts, exp_types=ExpTs}=St) ->
case [File || {attribute,_L,file,{File,_Line}} <- Forms] of
[FirstFile|_] ->
- UsedTypes = Usage#usage.used_types,
+ D = Usage#usage.used_types,
+ L = gb_sets:to_list(ExpTs) ++ dict:fetch_keys(D),
+ UsedTypes = gb_sets:from_list(L),
FoldFun =
fun(_Type, -1, AccSt) ->
%% Default type
@@ -2755,19 +2788,18 @@ check_unused_types(Forms, St = #lint{usage=Usage, types=Types}) ->
(Type, FileLine, AccSt) ->
case loc(FileLine) of
{FirstFile, _} ->
- case dict:is_key(Type, UsedTypes) of
+ case gb_sets:is_member(Type, UsedTypes) of
true -> AccSt;
false ->
- add_warning(FileLine,
- {unused_type, Type},
- AccSt)
+ Warn = {unused_type,Type},
+ add_warning(FileLine, Warn, AccSt)
end;
_ ->
- %% Don't warn about unused types in include file
+ %% No warns about unused types in include files
AccSt
end
end,
- dict:fold(FoldFun, St, Types);
+ dict:fold(FoldFun, St, Ts);
[] ->
St
end.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 05:24:26 +0000