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-rw-r--r--lib/compiler/test/warnings_SUITE.erl83
1 files changed, 72 insertions, 11 deletions
diff --git a/lib/compiler/test/warnings_SUITE.erl b/lib/compiler/test/warnings_SUITE.erl
index 0637041873..d0b7c71be8 100644
--- a/lib/compiler/test/warnings_SUITE.erl
+++ b/lib/compiler/test/warnings_SUITE.erl
@@ -39,7 +39,7 @@
guard/1,bad_arith/1,bool_cases/1,bad_apply/1,
files/1,effect/1,bin_opt_info/1,bin_construction/1,
comprehensions/1,maps/1,redundant_boolean_clauses/1,
- latin1_fallback/1]).
+ latin1_fallback/1,underscore/1,no_warnings/1]).
% Default timetrap timeout (set in init_per_testcase).
-define(default_timeout, ?t:minutes(2)).
@@ -64,7 +64,8 @@ groups() ->
[pattern,pattern2,pattern3,pattern4,guard,
bad_arith,bool_cases,bad_apply,files,effect,
bin_opt_info,bin_construction,comprehensions,maps,
- redundant_boolean_clauses,latin1_fallback]}].
+ redundant_boolean_clauses,latin1_fallback,
+ underscore,no_warnings]}].
init_per_suite(Config) ->
Config.
@@ -284,7 +285,7 @@ bad_arith(Config) when is_list(Config) ->
{10,sys_core_fold,{eval_failure,badarith}},
{15,sys_core_fold,{eval_failure,badarith}}
] }}],
- ?line [] = run(Config, Ts),
+ [] = run(Config, Ts),
ok.
bool_cases(Config) when is_list(Config) ->
@@ -578,11 +579,11 @@ maps(Config) when is_list(Config) ->
<<"
t() ->
M = {a,[]},
- {'EXIT',{badarg,_}} = (catch(M#{ a => 1})),
+ {'EXIT',{badarg,_}} = (catch(M#{ a => 1 })),
ok.
">>,
[],
- {warnings,[{4,v3_kernel,bad_map}]}},
+ {warnings,[{4,sys_core_fold,{eval_failure,badarg}}]}},
{bad_map_src2,
<<"
t() ->
@@ -592,7 +593,7 @@ maps(Config) when is_list(Config) ->
id(I) -> I.
">>,
[inline],
- {warnings,[{4,v3_kernel,bad_map}]}},
+ []},
{bad_map_src3,
<<"
t() ->
@@ -601,7 +602,7 @@ maps(Config) when is_list(Config) ->
">>,
[],
{warnings,[{3,v3_core,bad_map}]}},
- {bad_map_literal_key,
+ {ok_map_literal_key,
<<"
t() ->
V = id(1),
@@ -614,7 +615,7 @@ maps(Config) when is_list(Config) ->
id(I) -> I.
">>,
[],
- {warnings,[{6,v3_core,nomatch}]}}],
+ []}],
run(Config, Ts),
ok.
@@ -678,6 +679,66 @@ latin1_fallback(Conf) when is_list(Conf) ->
ok.
+underscore(Config) when is_list(Config) ->
+ S0 = <<"f(A) ->
+ _VAR1 = <<A>>,
+ _VAR2 = {ok,A},
+ _VAR3 = [A],
+ ok.
+ g(A) ->
+ _VAR1 = A/0,
+ _VAR2 = date(),
+ ok.
+ h() ->
+ _VAR1 = fun() -> ok end,
+ ok.
+ i(A) ->
+ _VAR1 = #{A=>42},
+ ok.
+ ">>,
+ Ts0 = [{underscore0,
+ S0,
+ [],
+ {warnings,[{2,sys_core_fold,useless_building},
+ {3,sys_core_fold,useless_building},
+ {4,sys_core_fold,useless_building},
+ {7,sys_core_fold,result_ignored},
+ {8,sys_core_fold,{no_effect,{erlang,date,0}}},
+ {11,sys_core_fold,useless_building},
+ {14,sys_core_fold,useless_building}
+ ]}}],
+ [] = run(Config, Ts0),
+
+ %% Replace all "_VAR<digit>" variables with a plain underscore.
+ %% Now there should be no warnings.
+ S1 = re:replace(S0, "_VAR\\d+", "_", [global]),
+ io:format("~s\n", [S1]),
+ Ts1 = [{underscore1,S1,[],[]}],
+ [] = run(Config, Ts1),
+
+ ok.
+
+no_warnings(Config) when is_list(Config) ->
+ Ts = [{no_warnings,
+ <<"-record(r, {s=ordsets:new(),a,b}).
+
+ a() ->
+ R = #r{}, %No warning expected.
+ {R#r.a,R#r.b}.
+
+ b(X) ->
+ T = true,
+ Var = [X], %No warning expected.
+ case T of
+ false -> Var;
+ true -> []
+ end.
+ ">>,
+ [],
+ []}],
+ run(Config, Ts),
+ ok.
+
%%%
%%% End of test cases.
%%%
@@ -699,10 +760,10 @@ run(Config, Tests) ->
%% Compiles a test module and returns the list of errors and warnings.
run_test(Conf, Test0, Warnings) ->
- Mod = "warnings_"++test_lib:uniq(),
- Filename = Mod ++ ".erl",
+ Module = "warnings_"++test_lib:uniq(),
+ Filename = Module ++ ".erl",
?line DataDir = ?privdir,
- Test = ["-module(", Mod, "). ", Test0],
+ Test = ["-module(", Module, "). ", Test0],
?line File = filename:join(DataDir, Filename),
?line Opts = [binary,export_all,return|Warnings],
?line ok = file:write_file(File, Test),