aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/test
diff options
context:
space:
mode:
Diffstat (limited to 'erts/emulator/test')
-rw-r--r--erts/emulator/test/Makefile3
-rw-r--r--erts/emulator/test/map_SUITE.erl273
-rw-r--r--erts/emulator/test/map_SUITE_data/badmap_17.beambin0 -> 592 bytes
-rw-r--r--erts/emulator/test/map_SUITE_data/badmap_17.erl26
4 files changed, 240 insertions, 62 deletions
diff --git a/erts/emulator/test/Makefile b/erts/emulator/test/Makefile
index dd2e2cb504..4dc4b5027d 100644
--- a/erts/emulator/test/Makefile
+++ b/erts/emulator/test/Makefile
@@ -125,7 +125,8 @@ NO_OPT= bs_bincomp \
bs_match_tail \
bs_match_misc \
bs_utf \
- guard
+ guard \
+ map
NATIVE= hibernate
diff --git a/erts/emulator/test/map_SUITE.erl b/erts/emulator/test/map_SUITE.erl
index ad8411cd68..39549282c0 100644
--- a/erts/emulator/test/map_SUITE.erl
+++ b/erts/emulator/test/map_SUITE.erl
@@ -38,6 +38,7 @@
t_map_equal/1,
t_map_compare/1,
t_map_size/1,
+ t_is_map/1,
%% Specific Map BIFs
t_bif_map_get/1,
@@ -74,7 +75,12 @@
t_pdict/1,
t_ets/1,
t_dets/1,
- t_tracing/1
+ t_tracing/1,
+
+ %% instruction-level tests
+ t_has_map_fields/1,
+ y_regs/1,
+ badmap_17/1
]).
-include_lib("stdlib/include/ms_transform.hrl").
@@ -114,7 +120,7 @@ all() -> [
%% erlang
t_erlang_hash, t_map_encode_decode,
- t_map_size,
+ t_map_size, t_is_map,
%% non specific BIF related
t_bif_build_and_check,
@@ -131,7 +137,12 @@ all() -> [
t_erts_internal_hash,
t_pdict,
t_ets,
- t_tracing
+ t_tracing,
+
+ %% instruction-level tests
+ t_has_map_fields,
+ y_regs,
+ badmap_17
].
groups() -> [].
@@ -157,6 +168,9 @@ t_build_and_match_literals(Config) when is_list(Config) ->
#{1:=a,2:=b,3:="c","4":="d",<<"5">>:=<<"e">>,{"6",7}:="f",8:=g} =
id(#{1=>a,2=>b,3=>"c","4"=>"d",<<"5">>=><<"e">>,{"6",7}=>"f",8=>g}),
+ #{[]:=a,42.0:=b,x:={x,y},[a,b]:=list} =
+ id(#{[]=>a,42.0=>b,x=>{x,y},[a,b]=>list}),
+
#{<<"hi all">> := 1} = id(#{<<"hi",32,"all">> => 1}),
#{a:=X,a:=X=3,b:=4} = id(#{a=>3,b=>4}), % weird but ok =)
@@ -664,9 +678,10 @@ t_map_size(Config) when is_list(Config) ->
N = map_size(maps:from_list([{float(I),I}||I<-Is])),
%% Error cases.
- {'EXIT',{badarg,_}} = (catch map_size([])),
- {'EXIT',{badarg,_}} = (catch map_size(<<1,2,3>>)),
- {'EXIT',{badarg,_}} = (catch map_size(1)),
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},_}} =
+ (catch map_size(T))
+ end),
ok.
build_and_check_size([K|Ks],N,M0) ->
@@ -680,6 +695,17 @@ build_and_check_size([],N,M) ->
map_is_size(M,N) when map_size(M) =:= N -> true;
map_is_size(_,_) -> false.
+t_is_map(Config) when is_list(Config) ->
+ true = is_map(#{}),
+ true = is_map(#{a=>1}),
+ false = is_map({a,b}),
+ false = is_map(x),
+ if is_map(#{}) -> ok end,
+ if is_map(#{b=>1}) -> ok end,
+ if not is_map([1,2,3]) -> ok end,
+ if not is_map(x) -> ok end,
+ ok.
+
% test map updates without matching
t_update_literals_large(Config) when is_list(Config) ->
Map = id(#{ 10=>id(a0),20=>b0,30=>id("c0"),"40"=>"d0",<<"50">>=>id("e0"),{["00"]}=>"10",
@@ -855,9 +881,11 @@ t_update_map_expressions(Config) when is_list(Config) ->
#{ "aa" := {$a,$a}, "ac":=41, "dc":=42 } =
(maps:from_list([{[K1,K2],{K1,K2}}|| K1 <- Ks, K2 <- Ks]))#{ "ac" := 41, "dc" => 42 },
- %% Error cases, FIXME: should be 'badmap'?
- {'EXIT',{badarg,_}} = (catch (id(<<>>))#{ a := 42, b => 2 }),
- {'EXIT',{badarg,_}} = (catch (id([]))#{ a := 42, b => 2 }),
+ %% Error cases.
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},_}} =
+ (catch (T)#{a:=42,b=>2})
+ end),
ok.
t_update_assoc(Config) when is_list(Config) ->
@@ -872,8 +900,10 @@ t_update_assoc(Config) when is_list(Config) ->
M2 = M0#{3.0:=wrong,3.0=>new},
%% Errors cases.
- BadMap = id(badmap),
- {'EXIT',{badarg,_}} = (catch BadMap#{nonexisting=>val}),
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},_}} =
+ (catch T#{nonexisting=>val})
+ end),
ok.
@@ -940,9 +970,6 @@ t_update_assoc_large(Config) when is_list(Config) ->
#{10:=a0,20:=b0,13.0:=new,"40":="d0",<<"50">>:="e0"} = M2,
M2 = M0#{13.0:=wrong,13.0=>new},
- %% Errors cases.
- BadMap = id(badmap),
- {'EXIT',{badarg,_}} = (catch BadMap#{nonexisting=>M0}),
ok.
t_update_exact(Config) when is_list(Config) ->
@@ -964,12 +991,17 @@ t_update_exact(Config) when is_list(Config) ->
1 := update2, 1.0 := new_val2, 1.0 => new_val3,
1.0 => new_val4 },
-
%% Errors cases.
- {'EXIT',{badarg,_}} = (catch M0#{nonexisting:=val}),
- {'EXIT',{badarg,_}} = (catch M0#{1.0:=v,1.0=>v2}),
- {'EXIT',{badarg,_}} = (catch M0#{42.0:=v,42:=v2}),
- {'EXIT',{badarg,_}} = (catch M0#{42=>v1,42.0:=v2,42:=v3}),
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},_}} =
+ (catch T#{nonexisting=>val})
+ end),
+ Empty = id(#{}),
+ {'EXIT',{{badkey,nonexisting},_}} = (catch Empty#{nonexisting:=val}),
+ {'EXIT',{{badkey,nonexisting},_}} = (catch M0#{nonexisting:=val}),
+ {'EXIT',{{badkey,1.0},_}} = (catch M0#{1.0:=v,1.0=>v2}),
+ {'EXIT',{{badkey,42},_}} = (catch M0#{42.0:=v,42:=v2}),
+ {'EXIT',{{badkey,42.0},_}} = (catch M0#{42=>v1,42.0:=v2,42:=v3}),
ok.
@@ -1048,10 +1080,10 @@ t_update_exact_large(Config) when is_list(Config) ->
M2 = M0#{13.0=>wrong,13.0:=new},
%% Errors cases.
- {'EXIT',{badarg,_}} = (catch M0#{nonexisting:=val}),
- {'EXIT',{badarg,_}} = (catch M0#{1.0:=v,1.0=>v2}),
- {'EXIT',{badarg,_}} = (catch M0#{42.0:=v,42:=v2}),
- {'EXIT',{badarg,_}} = (catch M0#{42=>v1,42.0:=v2,42:=v3}),
+ {'EXIT',{{badkey,nonexisting},_}} = (catch M0#{nonexisting:=val}),
+ {'EXIT',{{badkey,1.0},_}} = (catch M0#{1.0:=v,1.0=>v2}),
+ {'EXIT',{{badkey,42},_}} = (catch M0#{42.0:=v,42:=v2}),
+ {'EXIT',{{badkey,42.0},_}} = (catch M0#{42=>v1,42.0:=v2,42:=v3}),
ok.
@@ -1743,12 +1775,17 @@ t_bif_map_get(Config) when is_list(Config) ->
"tuple hi" = maps:get({1,1.0}, M1),
"v3" = maps:get(<<"k2">>, M1),
- %% error case
- {'EXIT',{badarg, [{maps,get,_,_}|_]}} = (catch maps:get(a,[])),
- {'EXIT',{badarg, [{maps,get,_,_}|_]}} = (catch maps:get(a,<<>>)),
- {'EXIT',{bad_key,[{maps,get,_,_}|_]}} = (catch maps:get({1,1}, #{{1,1.0} => "tuple"})),
- {'EXIT',{bad_key,[{maps,get,_,_}|_]}} = (catch maps:get(a,#{})),
- {'EXIT',{bad_key,[{maps,get,_,_}|_]}} = (catch maps:get(a,#{b=>1, c=>2})),
+ %% error cases
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},[{maps,get,_,_}|_]}} =
+ (catch maps:get(a, T))
+ end),
+
+ {'EXIT',{{badkey,{1,1}},[{maps,get,_,_}|_]}} =
+ (catch maps:get({1,1}, #{{1,1.0} => "tuple"})),
+ {'EXIT',{{badkey,a},[{maps,get,_,_}|_]}} = (catch maps:get(a, #{})),
+ {'EXIT',{{badkey,a},[{maps,get,_,_}|_]}} =
+ (catch maps:get(a, #{b=>1, c=>2})),
ok.
t_bif_map_find(Config) when is_list(Config) ->
@@ -1781,8 +1818,10 @@ t_bif_map_find(Config) when is_list(Config) ->
error = maps:find(1, #{ 1.0 => "float"}),
error = maps:find({1.0,1}, #{ a=>a, {1,1.0} => "tuple hi"}), % reverse types in tuple key
- {'EXIT',{badarg,[{maps,find,_,_}|_]}} = (catch maps:find(a,id([]))),
- {'EXIT',{badarg,[{maps,find,_,_}|_]}} = (catch maps:find(a,id(<<>>))),
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},[{maps,find,_,_}|_]}} =
+ (catch maps:find(a, T))
+ end),
ok.
@@ -1807,8 +1846,10 @@ t_bif_map_is_key(Config) when is_list(Config) ->
false = maps:is_key(1.0, maps:put(1, "number", M1)),
%% error case
- {'EXIT',{badarg,[{maps,is_key,_,_}|_]}} = (catch maps:is_key(a,id([]))),
- {'EXIT',{badarg,[{maps,is_key,_,_}|_]}} = (catch maps:is_key(a,id(<<>>))),
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},[{maps,is_key,_,_}|_]}} =
+ (catch maps:is_key(a, T))
+ end),
ok.
t_bif_map_keys(Config) when is_list(Config) ->
@@ -1822,11 +1863,10 @@ t_bif_map_keys(Config) when is_list(Config) ->
[4,int,"hi",<<"key">>] = lists:sort(maps:keys(M1)),
%% error case
- {'EXIT',{badarg,[{maps,keys,_,_}|_]}} = (catch maps:keys(1 bsl 65 + 3)),
- {'EXIT',{badarg,[{maps,keys,_,_}|_]}} = (catch maps:keys(154)),
- {'EXIT',{badarg,[{maps,keys,_,_}|_]}} = (catch maps:keys(atom)),
- {'EXIT',{badarg,[{maps,keys,_,_}|_]}} = (catch maps:keys([])),
- {'EXIT',{badarg,[{maps,keys,_,_}|_]}} = (catch maps:keys(<<>>)),
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},[{maps,keys,_,_}|_]}} =
+ (catch maps:keys(T))
+ end),
ok.
t_bif_map_new(Config) when is_list(Config) ->
@@ -1898,9 +1938,14 @@ t_bif_map_merge(Config) when is_list(Config) ->
ok = check_keys_exist(Ks1 ++ Ks2, M11),
%% error case
- {'EXIT',{badarg,[{maps,merge,_,_}|_]}} = (catch maps:merge((1 bsl 65 + 3), <<>>)),
- {'EXIT',{badarg,[{maps,merge,_,_}|_]}} = (catch maps:merge(<<>>, id(#{ a => 1}))),
- {'EXIT',{badarg,[{maps,merge,_,_}|_]}} = (catch maps:merge(id(#{ a => 2}), <<>> )),
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},[{maps,merge,_,_}|_]}} =
+ (catch maps:merge(#{}, T)),
+ {'EXIT',{{badmap,T},[{maps,merge,_,_}|_]}} =
+ (catch maps:merge(T, #{})),
+ {'EXIT',{{badmap,T},[{maps,merge,_,_}|_]}} =
+ (catch maps:merge(T, T))
+ end),
ok.
@@ -1939,11 +1984,10 @@ t_bif_map_put(Config) when is_list(Config) ->
true = is_members([number,wat,3,"hello",<<"other value">>],maps:values(M6)),
%% error case
- {'EXIT',{badarg,[{maps,put,_,_}|_]}} = (catch maps:put(1,a,1 bsl 65 + 3)),
- {'EXIT',{badarg,[{maps,put,_,_}|_]}} = (catch maps:put(1,a,154)),
- {'EXIT',{badarg,[{maps,put,_,_}|_]}} = (catch maps:put(1,a,atom)),
- {'EXIT',{badarg,[{maps,put,_,_}|_]}} = (catch maps:put(1,a,[])),
- {'EXIT',{badarg,[{maps,put,_,_}|_]}} = (catch maps:put(1,a,<<>>)),
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},[{maps,put,_,_}|_]}} =
+ (catch maps:put(1, a, T))
+ end),
ok.
is_members(Ks,Ls) when length(Ks) =/= length(Ls) -> false;
@@ -1986,11 +2030,10 @@ t_bif_map_remove(Config) when is_list(Config) ->
#{ "hi" := "hello", int := 3, 4 := number} = maps:remove(18446744073709551629,maps:remove(<<"key">>,M0)),
%% error case
- {'EXIT',{badarg,[{maps,remove,_,_}|_]}} = (catch maps:remove(a,1 bsl 65 + 3)),
- {'EXIT',{badarg,[{maps,remove,_,_}|_]}} = (catch maps:remove(1,154)),
- {'EXIT',{badarg,[{maps,remove,_,_}|_]}} = (catch maps:remove(a,atom)),
- {'EXIT',{badarg,[{maps,remove,_,_}|_]}} = (catch maps:remove(1,[])),
- {'EXIT',{badarg,[{maps,remove,_,_}|_]}} = (catch maps:remove(a,<<>>)),
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},[{maps,remove,_,_}|_]}} =
+ (catch maps:remove(a, T))
+ end),
ok.
t_bif_map_update(Config) when is_list(Config) ->
@@ -2013,10 +2056,10 @@ t_bif_map_update(Config) when is_list(Config) ->
4 := number, 18446744073709551629 := wazzup} = maps:update(18446744073709551629, wazzup, M0),
%% error case
- {'EXIT',{badarg,[{maps,update,_,_}|_]}} = (catch maps:update(1,none,{})),
- {'EXIT',{badarg,[{maps,update,_,_}|_]}} = (catch maps:update(1,none,<<"value">>)),
- {'EXIT',{badarg,[{maps,update,_,_}|_]}} = (catch maps:update(5,none,M0)),
-
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},[{maps,update,_,_}|_]}} =
+ (catch maps:update(1, none, T))
+ end),
ok.
@@ -2043,10 +2086,10 @@ t_bif_map_values(Config) when is_list(Config) ->
true = is_members([number,3,"hello2",<<"value2">>]++Vs,maps:values(M5)),
%% error case
- {'EXIT',{badarg,[{maps,values,_,_}|_]}} = (catch maps:values(1 bsl 65 + 3)),
- {'EXIT',{badarg,[{maps,values,_,_}|_]}} = (catch maps:values(atom)),
- {'EXIT',{badarg,[{maps,values,_,_}|_]}} = (catch maps:values([])),
- {'EXIT',{badarg,[{maps,values,_,_}|_]}} = (catch maps:values(<<>>)),
+ do_badmap(fun(T) ->
+ {'EXIT',{{badmap,T},[{maps,values,_,_}|_]}} =
+ (catch maps:values(T))
+ end),
ok.
t_erlang_hash(Config) when is_list(Config) ->
@@ -2245,8 +2288,10 @@ t_bif_map_to_list(Config) when is_list(Config) ->
<<"hi">>=>v6,3=>v7,"hi"=>v8,hi=>v9,{hi,3}=>v10})),
%% error cases
- {'EXIT', {badarg,_}} = (catch maps:to_list(id(a))),
- {'EXIT', {badarg,_}} = (catch maps:to_list(id(42))),
+ do_badmap(fun(T) ->
+ {'EXIT', {{badmap,T},_}} =
+ (catch maps:to_list(T))
+ end),
ok.
@@ -2703,5 +2748,111 @@ trace_collector(Msg,Parent) ->
Parent ! Msg,
Parent.
+t_has_map_fields(Config) when is_list(Config) ->
+ true = has_map_fields_1(#{one=>1}),
+ true = has_map_fields_1(#{one=>1,two=>2}),
+ false = has_map_fields_1(#{two=>2}),
+ false = has_map_fields_1(#{}),
+
+ true = has_map_fields_2(#{c=>1,b=>2,a=>3}),
+ true = has_map_fields_2(#{c=>1,b=>2,a=>3,x=>42}),
+ false = has_map_fields_2(#{b=>2,c=>1}),
+ false = has_map_fields_2(#{x=>y}),
+ false = has_map_fields_2(#{}),
+
+ true = has_map_fields_3(#{c=>1,b=>2,a=>3}),
+ true = has_map_fields_3(#{c=>1,b=>2,a=>3,[]=>42}),
+ true = has_map_fields_3(#{b=>2,a=>3,[]=>42,42.0=>43}),
+ true = has_map_fields_3(#{a=>3,[]=>42,42.0=>43}),
+ true = has_map_fields_3(#{[]=>42,42.0=>43}),
+ false = has_map_fields_3(#{b=>2,c=>1}),
+ false = has_map_fields_3(#{[]=>y}),
+ false = has_map_fields_3(#{42.0=>x,a=>99}),
+ false = has_map_fields_3(#{}),
+
+ ok.
+
+has_map_fields_1(#{one:=_}) -> true;
+has_map_fields_1(#{}) -> false.
+
+has_map_fields_2(#{a:=_,b:=_,c:=_}) -> true;
+has_map_fields_2(#{}) -> false.
+
+has_map_fields_3(#{a:=_,b:=_}) -> true;
+has_map_fields_3(#{[]:=_,42.0:=_}) -> true;
+has_map_fields_3(#{}) -> false.
+
+y_regs(Config) when is_list(Config) ->
+ Val = [length(Config)],
+ Map0 = y_regs_update(#{}, Val),
+ Map2 = y_regs_update(Map0, Val),
+
+ Map3 = maps:from_list([{I,I*I} || I <- lists:seq(1, 100)]),
+ Map4 = y_regs_update(Map3, Val),
+
+ true = is_map(Map2) andalso is_map(Map4),
+
+ ok.
+
+y_regs_update(Map0, Val0) ->
+ Val1 = {t,Val0},
+ K1 = id({key,1}),
+ K2 = id({key,2}),
+ Map1 = Map0#{K1=>K1,
+ a=>Val0,b=>Val0,c=>Val0,d=>Val0,e=>Val0,
+ f=>Val0,g=>Val0,h=>Val0,i=>Val0,j=>Val0,
+ k=>Val0,l=>Val0,m=>Val0,n=>Val0,o=>Val0,
+ p=>Val0,q=>Val0,r=>Val0,s=>Val0,t=>Val0,
+ u=>Val0,v=>Val0,w=>Val0,x=>Val0,y=>Val0,
+ z=>Val0,
+ aa=>Val0,ab=>Val0,ac=>Val0,ad=>Val0,ae=>Val0,
+ af=>Val0,ag=>Val0,ah=>Val0,ai=>Val0,aj=>Val0,
+ ak=>Val0,al=>Val0,am=>Val0,an=>Val0,ao=>Val0,
+ ap=>Val0,aq=>Val0,ar=>Val0,as=>Val0,at=>Val0,
+ au=>Val0,av=>Val0,aw=>Val0,ax=>Val0,ay=>Val0,
+ az=>Val0,
+ K2=>[a,b,c]},
+ Map2 = Map1#{K1=>K1,
+ a:=Val1,b:=Val1,c:=Val1,d:=Val1,e:=Val1,
+ f:=Val1,g:=Val1,h:=Val1,i:=Val1,j:=Val1,
+ k:=Val1,l:=Val1,m:=Val1,n:=Val1,o:=Val1,
+ p:=Val1,q:=Val1,r:=Val1,s:=Val1,t:=Val1,
+ u:=Val1,v:=Val1,w:=Val1,x:=Val1,y:=Val1,
+ z:=Val1,
+ aa:=Val1,ab:=Val1,ac:=Val1,ad:=Val1,ae:=Val1,
+ af:=Val1,ag:=Val1,ah:=Val1,ai:=Val1,aj:=Val1,
+ ak:=Val1,al:=Val1,am:=Val1,an:=Val1,ao:=Val1,
+ ap:=Val1,aq:=Val1,ar:=Val1,as:=Val1,at:=Val1,
+ au:=Val1,av:=Val1,aw:=Val1,ax:=Val1,ay:=Val1,
+ az:=Val1,
+ K2=>[a,b,c]},
+
+ %% Traverse the maps to validate them.
+ _ = erlang:phash2({Map1,Map2}, 100000),
+
+ _ = id({K1,K2,Val0,Val1}), %Force use of Y registers.
+ Map2.
+
+do_badmap(Test) ->
+ Terms = [Test,fun erlang:abs/1,make_ref(),self(),0.0/id(-1),
+ <<0:1024>>,<<1:1>>,<<>>,<<1,2,3>>,
+ [],{a,b,c},[a,b],atom,10.0,42,(1 bsl 65) + 3],
+ [Test(T) || T <- Terms].
+
+%% Test that a module compiled with the OTP 17 compiler will
+%% generate the correct 'badmap' exception.
+badmap_17(Config) ->
+ case ?MODULE of
+ map_SUITE -> do_badmap_17(Config);
+ _ -> {skip,"Run in map_SUITE"}
+ end.
+
+do_badmap_17(Config) ->
+ Mod = badmap_17,
+ DataDir = test_server:lookup_config(data_dir, Config),
+ Beam = filename:join(DataDir, Mod),
+ {module,Mod} = code:load_abs(Beam),
+ do_badmap(fun Mod:update/1).
+
%% Use this function to avoid compile-time evaluation of an expression.
id(I) -> I.
diff --git a/erts/emulator/test/map_SUITE_data/badmap_17.beam b/erts/emulator/test/map_SUITE_data/badmap_17.beam
new file mode 100644
index 0000000000..277fc34b94
--- /dev/null
+++ b/erts/emulator/test/map_SUITE_data/badmap_17.beam
Binary files differ
diff --git a/erts/emulator/test/map_SUITE_data/badmap_17.erl b/erts/emulator/test/map_SUITE_data/badmap_17.erl
new file mode 100644
index 0000000000..0ec65e0e33
--- /dev/null
+++ b/erts/emulator/test/map_SUITE_data/badmap_17.erl
@@ -0,0 +1,26 @@
+-module(badmap_17).
+-export([update/1]).
+
+%% Compile this source file with OTP 17.
+
+update(Map) ->
+ try
+ update_1(Map),
+ error(update_did_not_fail)
+ catch
+ error:{badmap,Map} ->
+ ok
+ end,
+ try
+ update_2(Map),
+ error(update_did_not_fail)
+ catch
+ error:{badmap,Map} ->
+ ok
+ end.
+
+update_1(M) ->
+ M#{a=>42}.
+
+update_2(M) ->
+ M#{a:=42}.
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-20 07:23:05 +0000