diff options
| -rw-r--r-- | lib/stdlib/src/erl_lint.erl | 97 | ||||
| -rw-r--r-- | lib/stdlib/test/erl_lint_SUITE.erl | 156 |
2 files changed, 162 insertions, 91 deletions
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl index b14102ac38..2508f96b91 100644 --- a/lib/stdlib/src/erl_lint.erl +++ b/lib/stdlib/src/erl_lint.erl @@ -1502,7 +1502,7 @@ pattern({op,_Line,'++',{string,_Li,_S},R}, Vt, Old, Bvt, St) -> pattern({match,_Line,Pat1,Pat2}, Vt, Old, Bvt, St0) -> {Lvt,Bvt1,St1} = pattern(Pat1, Vt, Old, Bvt, St0), {Rvt,Bvt2,St2} = pattern(Pat2, Vt, Old, Bvt, St1), - St3 = reject_bin_alias(Pat1, Pat2, St2), + St3 = reject_invalid_alias(Pat1, Pat2, Vt, St2), {vtmerge_pat(Lvt, Rvt),vtmerge_pat(Bvt1,Bvt2),St3}; %% Catch legal constant expressions, including unary +,-. pattern(Pat, _Vt, _Old, _Bvt, St) -> @@ -1517,56 +1517,77 @@ pattern_list(Ps, Vt, Old, Bvt0, St) -> {vtmerge_pat(Pvt, Psvt),vtmerge_pat(Bvt,Bvt1),St1} end, {[],[],St}, Ps). -%% reject_bin_alias(Pat, Expr, St) -> St' + + +%% reject_invalid_alias(Pat, Expr, Vt, St) -> St' %% Reject aliases for binary patterns at the top level. +%% Reject aliases for maps patterns at the top level. +%% The variables table (Vt) are for maps checkking. + +reject_invalid_alias_expr({bin,_,_}=P, {match,_,P0,E}, Vt, St0) -> + St = reject_invalid_alias(P, P0, Vt, St0), + reject_invalid_alias_expr(P, E, Vt, St); +reject_invalid_alias_expr({map,_,_}=P, {match,_,P0,E}, Vt, St0) -> + St = reject_invalid_alias(P, P0, Vt, St0), + reject_invalid_alias_expr(P, E, Vt, St); +reject_invalid_alias_expr({match,_,_,_}=P, {match,_,P0,E}, Vt, St0) -> + St = reject_invalid_alias(P, P0, Vt, St0), + reject_invalid_alias_expr(P, E, Vt, St); +reject_invalid_alias_expr(_, _, _, St) -> St. -reject_bin_alias_expr({bin,_,_}=P, {match,_,P0,E}, St0) -> - St = reject_bin_alias(P, P0, St0), - reject_bin_alias_expr(P, E, St); -reject_bin_alias_expr({match,_,_,_}=P, {match,_,P0,E}, St0) -> - St = reject_bin_alias(P, P0, St0), - reject_bin_alias_expr(P, E, St); -reject_bin_alias_expr(_, _, St) -> St. -%% reject_bin_alias(Pat1, Pat2, St) -> St' +%% reject_invalid_alias(Pat1, Pat2, St) -> St' %% Aliases of binary patterns, such as <<A:8>> = <<B:4,C:4>> or even %% <<A:8>> = <<A:8>>, are not allowed. Traverse the patterns in parallel %% and generate an error if any binary aliases are found. %% We generate an error even if is obvious that the overall pattern can't %% possibly match, for instance, {a,<<A:8>>,c}={x,<<A:8>>} WILL generate an %% error. +%% Maps should reject unbound variables here. -reject_bin_alias({bin,Line,_}, {bin,_,_}, St) -> +reject_invalid_alias({bin,Line,_}, {bin,_,_}, _, St) -> add_error(Line, illegal_bin_pattern, St); -reject_bin_alias({cons,_,H1,T1}, {cons,_,H2,T2}, St0) -> - St = reject_bin_alias(H1, H2, St0), - reject_bin_alias(T1, T2, St); -reject_bin_alias({tuple,_,Es1}, {tuple,_,Es2}, St) -> - reject_bin_alias_list(Es1, Es2, St); -reject_bin_alias({record,_,Name1,Pfs1}, {record,_,Name2,Pfs2}, +reject_invalid_alias({map,_Line,Ps1}, {map,_,Ps2}, Vt, St0) -> + Fun = fun ({map_field_exact,L,{var,_,K},_V}, Sti) -> + case is_var_bound(K,Vt) of + true -> + Sti; + false -> + add_error(L, {unbound_var,K}, Sti) + end; + ({map_field_exact,_L,_K,_V}, Sti) -> + Sti + end, + foldl(Fun, foldl(Fun, St0, Ps1), Ps2); +reject_invalid_alias({cons,_,H1,T1}, {cons,_,H2,T2}, Vt, St0) -> + St = reject_invalid_alias(H1, H2, Vt, St0), + reject_invalid_alias(T1, T2, Vt, St); +reject_invalid_alias({tuple,_,Es1}, {tuple,_,Es2}, Vt, St) -> + reject_invalid_alias_list(Es1, Es2, Vt, St); +reject_invalid_alias({record,_,Name1,Pfs1}, {record,_,Name2,Pfs2}, Vt, #lint{records=Recs}=St) -> case {dict:find(Name1, Recs),dict:find(Name2, Recs)} of {{ok,{_Line1,Fields1}},{ok,{_Line2,Fields2}}} -> - reject_bin_alias_rec(Pfs1, Pfs2, Fields1, Fields2, St); + reject_invalid_alias_rec(Pfs1, Pfs2, Fields1, Fields2, Vt, St); {_,_} -> %% One or more non-existing records. (An error messages has %% already been generated, so we are done here.) St end; -reject_bin_alias({match,_,P1,P2}, P, St0) -> - St = reject_bin_alias(P1, P, St0), - reject_bin_alias(P2, P, St); -reject_bin_alias(P, {match,_,_,_}=M, St) -> - reject_bin_alias(M, P, St); -reject_bin_alias(_P1, _P2, St) -> St. - -reject_bin_alias_list([E1|Es1], [E2|Es2], St0) -> - St = reject_bin_alias(E1, E2, St0), - reject_bin_alias_list(Es1, Es2, St); -reject_bin_alias_list(_, _, St) -> St. - -reject_bin_alias_rec(PfsA0, PfsB0, FieldsA0, FieldsB0, St) -> +reject_invalid_alias({match,_,P1,P2}, P, Vt, St0) -> + St = reject_invalid_alias(P1, P, Vt, St0), + reject_invalid_alias(P2, P, Vt, St); +reject_invalid_alias(P, {match,_,_,_}=M, Vt, St) -> + reject_invalid_alias(M, P, Vt, St); +reject_invalid_alias(_P1, _P2, _Vt, St) -> St. + +reject_invalid_alias_list([E1|Es1], [E2|Es2], Vt, St0) -> + St = reject_invalid_alias(E1, E2, Vt, St0), + reject_invalid_alias_list(Es1, Es2, Vt, St); +reject_invalid_alias_list(_, _, _, St) -> St. + +reject_invalid_alias_rec(PfsA0, PfsB0, FieldsA0, FieldsB0, Vt, St) -> %% We treat records as if they have been converted to tuples. PfsA1 = rbia_field_vars(PfsA0), PfsB1 = rbia_field_vars(PfsB0), @@ -1582,7 +1603,7 @@ reject_bin_alias_rec(PfsA0, PfsB0, FieldsA0, FieldsB0, St) -> D = sofs:projection({external,fun({_,_,P1,_,P2}) -> {P1,P2} end}, C), E = sofs:to_external(D), {Ps1,Ps2} = lists:unzip(E), - reject_bin_alias_list(Ps1, Ps2, St). + reject_invalid_alias_list(Ps1, Ps2, Vt, St). rbia_field_vars(Fs) -> [{Name,Pat} || {record_field,_,{atom,_,Name},Pat} <- Fs]. @@ -2284,7 +2305,7 @@ expr({'catch',Line,E}, Vt, St0) -> expr({match,_Line,P,E}, Vt, St0) -> {Evt,St1} = expr(E, Vt, St0), {Pvt,Bvt,St2} = pattern(P, vtupdate(Evt, Vt), St1), - St = reject_bin_alias_expr(P, E, St2), + St = reject_invalid_alias_expr(P, E, Vt, St2), {vtupdate(Bvt, vtmerge(Evt, Pvt)),St}; %% No comparison or boolean operators yet. expr({op,_Line,_Op,A}, Vt, St) -> @@ -2381,7 +2402,7 @@ is_valid_call(Call) -> _ -> true end. -%% is_valid_map_key(K,St) -> true | false +%% is_valid_map_key(K) -> true | false %% variables are allowed for patterns only at the top of the tree is_valid_map_key({var,_,_}) -> true; @@ -3413,6 +3434,14 @@ warn_unused_vars(U, Vt, St0) -> UVt = map(fun ({V,{State,_,Ls}}) -> {V,{State,used,Ls}} end, U), {vtmerge(Vt, UVt), St1}. + +is_var_bound(V, Vt) -> + case orddict:find(V, Vt) of + {ok,{bound,_Usage,_}} -> true; + _ -> false + end. + + %% vtupdate(UpdVarTable, VarTable) -> VarTable. %% Add the variables in the updated vartable to VarTable. The variables %% will be updated with their property in UpdVarTable. The state of diff --git a/lib/stdlib/test/erl_lint_SUITE.erl b/lib/stdlib/test/erl_lint_SUITE.erl index 6fea198af3..b0214e5238 100644 --- a/lib/stdlib/test/erl_lint_SUITE.erl +++ b/lib/stdlib/test/erl_lint_SUITE.erl @@ -33,47 +33,38 @@ -define(privdir, proplists:get_value(priv_dir, Conf)). -endif. --export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, - init_per_group/2,end_per_group/2, - init_per_testcase/2, end_per_testcase/2]). - --export([ - unused_vars_warn_basic/1, - unused_vars_warn_lc/1, - unused_vars_warn_rec/1, - unused_vars_warn_fun/1, - unused_vars_OTP_4858/1, - unused_unsafe_vars_warn/1, - export_vars_warn/1, - shadow_vars/1, - unused_import/1, - unused_function/1, - unsafe_vars/1,unsafe_vars2/1, - unsafe_vars_try/1, - unsized_binary_in_bin_gen_pattern/1, - guard/1, otp_4886/1, otp_4988/1, otp_5091/1, otp_5276/1, otp_5338/1, - otp_5362/1, otp_5371/1, otp_7227/1, otp_5494/1, otp_5644/1, otp_5878/1, - otp_5917/1, otp_6585/1, otp_6885/1, otp_10436/1, otp_11254/1, - otp_11772/1, otp_11771/1, otp_11872/1, - export_all/1, - bif_clash/1, - behaviour_basic/1, behaviour_multiple/1, otp_11861/1, - otp_7550/1, - otp_8051/1, - format_warn/1, - on_load_successful/1, on_load_failing/1, - too_many_arguments/1, - basic_errors/1,bin_syntax_errors/1, - predef/1, - maps/1,maps_type/1,otp_11851/1,otp_11879/1,otp_13230/1, - record_errors/1 - ]). - -init_per_testcase(_Case, Config) -> - Config. - -end_per_testcase(_Case, _Config) -> - ok. +-export([all/0, suite/0, groups/0]). + +-export([unused_vars_warn_basic/1, + unused_vars_warn_lc/1, + unused_vars_warn_rec/1, + unused_vars_warn_fun/1, + unused_vars_OTP_4858/1, + unused_unsafe_vars_warn/1, + export_vars_warn/1, + shadow_vars/1, + unused_import/1, + unused_function/1, + unsafe_vars/1,unsafe_vars2/1, + unsafe_vars_try/1, + unsized_binary_in_bin_gen_pattern/1, + guard/1, otp_4886/1, otp_4988/1, otp_5091/1, otp_5276/1, otp_5338/1, + otp_5362/1, otp_5371/1, otp_7227/1, otp_5494/1, otp_5644/1, otp_5878/1, + otp_5917/1, otp_6585/1, otp_6885/1, otp_10436/1, otp_11254/1, + otp_11772/1, otp_11771/1, otp_11872/1, + export_all/1, + bif_clash/1, + behaviour_basic/1, behaviour_multiple/1, otp_11861/1, + otp_7550/1, + otp_8051/1, + format_warn/1, + on_load_successful/1, on_load_failing/1, + too_many_arguments/1, + basic_errors/1,bin_syntax_errors/1, + predef/1, + maps/1,maps_type/1,maps_parallel_match/1, + otp_11851/1,otp_11879/1,otp_13230/1, + record_errors/1]). suite() -> [{ct_hooks,[ts_install_cth]}, @@ -91,7 +82,8 @@ all() -> bif_clash, behaviour_basic, behaviour_multiple, otp_11861, otp_7550, otp_8051, format_warn, {group, on_load}, too_many_arguments, basic_errors, bin_syntax_errors, predef, - maps, maps_type, otp_11851, otp_11879, otp_13230, + maps, maps_type, maps_parallel_match, + otp_11851, otp_11879, otp_13230, record_errors]. groups() -> @@ -101,19 +93,6 @@ groups() -> unused_vars_OTP_4858, unused_unsafe_vars_warn]}, {on_load, [], [on_load_successful, on_load_failing]}]. -init_per_suite(Config) -> - Config. - -end_per_suite(_Config) -> - ok. - -init_per_group(_GroupName, Config) -> - Config. - -end_per_group(_GroupName, Config) -> - Config. - - %% Warnings for unused variables in some simple cases. unused_vars_warn_basic(Config) when is_list(Config) -> @@ -3583,8 +3562,6 @@ predef(Config) when is_list(Config) -> ok. maps(Config) -> - %% TODO: test key patterns, not done because map patterns are going to be - %% changed a lot. Ts = [{illegal_map_construction, <<"t() -> #{ a := b, @@ -3626,6 +3603,26 @@ maps(Config) -> {errors,[{1,erl_lint,illegal_map_construction}, {1,erl_lint,{unbound_var,'X'}}], []}}, + {legal_map_pattern, + <<" + -record(mapkey, {a=1,b=2}). + t(M,K1) -> + #{ a := 1, + $a := 1, $z := 99, + #{a=>val} := 2, + K1 := 1337, + #mapkey{a = 10} := wat, + #{{a,val}=>val} := 2, + #{ \"hi\" => wazzup, hi => ho } := yep, + ok := 1.0, + [3+3] := nope, + 1.0 := yep, + {3.0+3} := nope, + {yep} := yep + } = M. + ">>, + [], + []}, {legal_map_construction, <<"t(V) -> #{ a => 1, #{a=>V} => 2, @@ -3692,6 +3689,51 @@ maps_type(Config) when is_list(Config) -> [] = run(Config, Ts), ok. +maps_parallel_match(Config) when is_list(Config) -> + Ts = [{parallel_map_patterns_unbound1, + <<" + t(#{} = M) -> + #{K := V} = #{k := K} = M, + V. + ">>, + [], + {errors,[{3,erl_lint,{unbound_var,'K'}}],[]}}, + {parallel_map_patterns_unbound2, + <<" + t(#{} = M) -> + #{K1 := V1} = + #{K2 := V2} = + #{k1 := K1,k2 := K2} = M, + [V1,V2]. + ">>, + [], + {errors,[{3,erl_lint,{unbound_var,'K1'}}, + {3,erl_lint,{unbound_var,'K1'}}, + {4,erl_lint,{unbound_var,'K2'}}, + {4,erl_lint,{unbound_var,'K2'}}],[]}}, + {parallel_map_patterns_bound, + <<" + t(#{} = M,K1,K2) -> + #{K1 := V1} = + #{K2 := V2} = + #{k1 := K1,k2 := K2} = M, + [V1,V2]. + ">>, + [], + []}, + {parallel_map_patterns_literal, + <<" + t(#{} = M) -> + #{k1 := V1} = + #{k2 := V2} = + #{k1 := V1,k2 := V2} = M, + [V1,V2]. + ">>, + [], + []}], + [] = run(Config, Ts), + ok. + %% OTP-11851: More atoms can be used as type names + bug fixes. otp_11851(Config) when is_list(Config) -> Ts = [ |