%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2013. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(map_SUITE).
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2
]).
-export([
%% literals
t_build_and_match_literals/1,
t_update_literals/1,t_match_and_update_literals/1,
t_update_map_expressions/1,
t_update_assoc/1,t_update_exact/1,
t_guard_bifs/1, t_guard_sequence/1, t_guard_update/1,
t_guard_receive/1, t_guard_fun/1,
t_list_comprehension/1,
t_map_sort_literals/1,
t_map_size/1,
t_build_and_match_aliasing/1,
%% variables
t_build_and_match_variables/1,
t_update_assoc_variables/1,t_update_exact_variables/1,
t_nested_pattern_expressions/1,
t_guard_update_variables/1,
t_guard_sequence_variables/1,
t_guard_sequence_mixed/1,
t_frequency_table/1,
%% warnings
t_warn_useless_build/1,
t_warn_pair_key_overloaded/1,
%% not covered in 17.0-rc1
t_build_and_match_over_alloc/1,
t_build_and_match_empty_val/1,
t_build_and_match_val/1,
t_build_and_match_nil/1,
t_build_and_match_structure/1,
%% errors in 17.0-rc1
t_update_values/1,
t_expand_map_update/1,
t_export/1
]).
suite() -> [].
all() -> [
%% literals
t_build_and_match_literals,
t_update_literals, t_match_and_update_literals,
t_update_map_expressions,
t_update_assoc,t_update_exact,
t_guard_bifs, t_guard_sequence, t_guard_update,
t_guard_receive,t_guard_fun, t_list_comprehension,
t_map_sort_literals,
t_map_size,
t_build_and_match_aliasing,
%% variables
t_build_and_match_variables,
t_update_assoc_variables,t_update_exact_variables,
t_nested_pattern_expressions,
t_guard_update_variables,
t_guard_sequence_variables,
t_guard_sequence_mixed,
t_frequency_table,
%% warnings
t_warn_useless_build,
t_warn_pair_key_overloaded,
%% not covered in 17.0-rc1
t_build_and_match_over_alloc,
t_build_and_match_empty_val,
t_build_and_match_val,
t_build_and_match_nil,
t_build_and_match_structure,
%% errors in 17.0-rc1
t_update_values,
t_expand_map_update,
t_export
].
groups() -> [].
init_per_suite(Config) -> Config.
end_per_suite(_Config) -> ok.
init_per_group(_GroupName, Config) -> Config.
end_per_group(_GroupName, Config) -> Config.
%% tests
t_build_and_match_literals(Config) when is_list(Config) ->
#{} = id(#{}),
#{1:=a} = id(#{1=>a}),
#{1:=a,2:=b} = id(#{1=>a,2=>b}),
#{1:=a,2:=b,3:="c"} = id(#{1=>a,2=>b,3=>"c"}),
#{1:=a,2:=b,3:="c","4":="d"} = id(#{1=>a,2=>b,3=>"c","4"=>"d"}),
#{1:=a,2:=b,3:="c","4":="d",<<"5">>:=<<"e">>} =
id(#{1=>a,2=>b,3=>"c","4"=>"d",<<"5">>=><<"e">>}),
#{1:=a,2:=b,3:="c","4":="d",<<"5">>:=<<"e">>,{"6",7}:="f"} =
id(#{1=>a,2=>b,3=>"c","4"=>"d",<<"5">>=><<"e">>,{"6",7}=>"f"}),
#{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}),
#{<<"hi all">> := 1} = id(#{<<"hi",32,"all">> => 1}),
#{a:=X,a:=X=3,b:=4} = id(#{a=>3,b=>4}), % weird but ok =)
#{ a:=#{ b:=#{c := third, b:=second}}, b:=first} =
id(#{ b=>first, a=>#{ b=>#{c => third, b=> second}}}),
M = #{ map_1=>#{ map_2=>#{value_3 => third}, value_2=> second}, value_1=>first},
M = #{ map_1:=#{ map_2:=#{value_3 := third}, value_2:= second}, value_1:=first} =
id(#{ map_1=>#{ map_2=>#{value_3 => third}, value_2=> second}, value_1=>first}),
%% map key
#{ #{} := 42 } = id(#{ #{} => 42 }),
#{ #{ "a" => 3 } := 42 } = id(#{ #{ "a" => 3} => 42 }),
%% nil key
#{[]:=ok,1:=2} = id(#{[]=>ok,1=>2}),
#{1:=2,[]:=ok,1:=2} = id(#{[]=>ok,1=>2}),
%% pseudo literals
#{ -3 := yep } = id(#{ -3 => yep }),
#{ <<0:358>> := "three" } = id(#{<<0:358>> =>"three"}),
%% error case
{'EXIT',{{badmatch,_},_}} = (catch (#{x:=3,x:=2} = id(#{x=>3}))),
{'EXIT',{{badmatch,_},_}} = (catch (#{x:=2} = id(#{x=>3}))),
{'EXIT',{{badmatch,_},_}} = (catch (#{x:=3} = id({a,b,c}))),
{'EXIT',{{badmatch,_},_}} = (catch (#{x:=3} = id(#{y=>3}))),
{'EXIT',{{badmatch,_},_}} = (catch (#{x:=3} = id(#{x=>"three"}))),
{'EXIT',{{badmatch,_},_}} = (catch (#{#{"a"=>42} := 3}=id(#{#{"a"=>3}=>42}))),
ok.
t_build_and_match_aliasing(Config) when is_list(Config) ->
M1 = id(#{a=>1,b=>2,c=>3,d=>4}),
#{c:=C1=_=_=C2} = M1,
true = C1 =:= C2,
#{a:=A,a:=A,a:=A,b:=B,b:=B} = M1,
#{a:=A,a:=A,a:=A,b:=B,b:=B,b:=2} = M1,
#{a:=A=1,a:=A,a:=A,b:=B=2,b:=B,b:=2} = M1,
#{c:=C1, c:=_, c:=3, c:=_, c:=C2} = M1,
#{c:=C=_=3=_=C} = M1,
M2 = id(#{"a"=>1,"b"=>2,"c"=>3,"d"=>4}),
#{"a":=A2,"a":=A2,"a":=A2,"b":=B2,"b":=B2,"b":=2} = M2,
#{"a":=_,"a":=_,"a":=_,"b":=_,"b":=_,"b":=2} = M2,
#{a:=A1,a:=A1,a:=A1,b:=B1,b:=B1} = #{a:=A1,a:=A1,a:=A1,b:=B1,b:=B1,b:=2} = M1,
#{"a":=A3,"b":=B3} = #{"a":=A3,"a":=A3} = #{"b":=B3,"b":=2} = M2,
#{"a":=1,"b":=2,"c":=3,"d":=4} = #{"a":=A4,"b":=B4} = #{"a":=A4,"a":=A4} = #{"b":=B4,"d":=4} = M2,
#{"a":=A5,"b":=B5} = #{"a":=A5,"a":=A5} = #{"b":=B5,"d":=4} = #{"a":=1,"b":=2,"c":=3,"d":=4} = M2,
#{"a":=_,"b":=_} = #{"a":=_,"a":=_} = #{"b":=_,"d":=4} = #{"a":=1,"b":=2,"c":=3,"d":=4} = M2,
M3 = id(#{<<12:300>>=>1,<<13:300>>=>2}),
#{<<12:300>> := V1, <<13:300>> := V2} = #{<<13:300>> := V2, <<12:300>> := V1} = M3,
#{<<12:300>> := 1, <<13:300>> := 2} = #{<<13:300>> := _, <<12:300>> := _} = M3,
#{<<13:300>> := _, <<12:300>> := _} = #{<<12:300>> := 1, <<13:300>> := 2} = M3,
ok.
t_map_size(Config) when is_list(Config) ->
0 = map_size(id(#{})),
1 = map_size(id(#{a=>1})),
1 = map_size(id(#{a=>"wat"})),
2 = map_size(id(#{a=>1, b=>2})),
3 = map_size(id(#{a=>1, b=>2, b=>"3","33"=><<"n">>})),
true = map_is_size(#{a=>1}, 1),
true = map_is_size(#{a=>1, a=>2}, 1),
M = #{ "a" => 1, "b" => 2},
true = map_is_size(M, 2),
false = map_is_size(M, 3),
true = map_is_size(M#{ "a" => 2}, 2),
false = map_is_size(M#{ "c" => 2}, 2),
%% Error cases.
{'EXIT',{badarg,_}} = (catch map_size([])),
{'EXIT',{badarg,_}} = (catch map_size(<<1,2,3>>)),
{'EXIT',{badarg,_}} = (catch map_size(1)),
ok.
map_is_size(M,N) when map_size(M) =:= N -> true;
map_is_size(_,_) -> false.
% test map updates without matching
t_update_literals(Config) when is_list(Config) ->
Map = #{x=>1,y=>2,z=>3,q=>4},
#{x:="d",q:="4"} = loop_update_literals_x_q(Map, [
{"a","1"},{"b","2"},{"c","3"},{"d","4"}
]),
ok.
loop_update_literals_x_q(Map, []) -> Map;
loop_update_literals_x_q(Map, [{X,Q}|Vs]) ->
loop_update_literals_x_q(Map#{q=>Q,x=>X},Vs).
% test map updates with matching
t_match_and_update_literals(Config) when is_list(Config) ->
Map = #{x=>0,y=>"untouched",z=>"also untouched",q=>1},
#{x:=16,q:=21,y:="untouched",z:="also untouched"} = loop_match_and_update_literals_x_q(Map, [
{1,2},{3,4},{5,6},{7,8}
]),
M0 = id(#{ "hi" => "hello", int => 3, <<"key">> => <<"value">>,
4 => number, 18446744073709551629 => wat}),
M1 = id(#{}),
M2 = M1#{ "hi" => "hello", int => 3, <<"key">> => <<"value">>,
4 => number, 18446744073709551629 => wat},
M0 = M2,
#{ 4 := another_number, int := 3 } = M2#{ 4 => another_number },
ok.
loop_match_and_update_literals_x_q(Map, []) -> Map;
loop_match_and_update_literals_x_q(#{q:=Q0,x:=X0} = Map, [{X,Q}|Vs]) ->
loop_match_and_update_literals_x_q(Map#{q=>Q0+Q,x=>X0+X},Vs).
t_update_map_expressions(Config) when is_list(Config) ->
M = maps:new(),
X = id(fondue),
M1 = #{ a := 1 } = M#{a => 1},
#{ b := {X} } = M1#{ a := 1, b => {X} },
#{ b := 2 } = (maps:new())#{ b => 2 },
#{ a :=42, b:=42, c:=42 } = (maps:from_list([{a,1},{b,2},{c,3}]))#{ a := 42, b := 42, c := 42 },
#{ "a" :=1, "b":=42, "c":=42 } = (maps:from_list([{"a",1},{"b",2}]))#{ "b" := 42, "c" => 42 },
%% Test need to be in a fun.
%% This tests that let expr optimisation in sys_core_fold
%% covers maps correctly.
F = fun() ->
M0 = id(#{ "a" => [1,2,3] }),
#{ "a" := _ } = M0,
M0#{ "a" := b }
end,
#{ "a" := b } = F(),
%% Error cases, FIXME: should be 'badmap'?
{'EXIT',{badarg,_}} = (catch (id(<<>>))#{ a := 42, b => 2 }),
{'EXIT',{badarg,_}} = (catch (id([]))#{ a := 42, b => 2 }),
ok.
t_update_assoc(Config) when is_list(Config) ->
M0 = id(#{1=>a,2=>b,3.0=>c,4=>d,5=>e}),
M1 = M0#{1=>42,2=>100,4=>[a,b,c]},
#{1:=42,2:=100,3.0:=c,4:=[a,b,c],5:=e} = M1,
#{1:=42,2:=b,4:=d,5:=e,2.0:=100,3.0:=c,4.0:=[a,b,c]} = M0#{1.0=>float,1:=42,2.0=>wrong,2.0=>100,4.0=>[a,b,c]},
M2 = M0#{3.0=>new},
#{1:=a,2:=b,3.0:=new,4:=d,5:=e} = M2,
M2 = M0#{3.0:=wrong,3.0=>new},
% Can't handle directly yet
Bin = <<0:257>>,
#{ Bin := val } = id(M0#{<<0:257>> => val}), %% binary limitation
%% Errors cases.
BadMap = id(badmap),
{'EXIT',{badarg,_}} = (catch BadMap#{nonexisting=>val}),
{'EXIT',{badarg,_}} = (catch <<>>#{nonexisting=>val}),
ok.
t_update_exact(Config) when is_list(Config) ->
M0 = id(#{1=>a,2=>b,3.0=>c,4=>d,5=>e}),
M1 = M0#{1:=42,2:=100,4:=[a,b,c]},
#{1:=42,2:=100,3.0:=c,4:=[a,b,c],5:=e} = M1,
M1 = M0#{1:=wrong,1=>42,2=>wrong,2:=100,4:=[a,b,c]},
M2 = M0#{3.0:=new},
#{1:=a,2:=b,3.0:=new,4:=d,5:=e} = M2,
M2 = M0#{3.0=>wrong,3.0:=new},
true = M2 =/= M0#{3=>right,3.0:=new},
#{ 3 := right, 3.0 := new } = M0#{3=>right,3.0:=new},
M3 = id(#{ 1 => val}),
#{1 := update2,1.0 := new_val4} = M3#{
1.0 => new_val1, 1 := update, 1=> update3,
1 := update2, 1.0 := new_val2, 1.0 => new_val3,
1.0 => new_val4 },
%% Errors cases.
{'EXIT',{badarg,_}} = (catch ((id(nil))#{ a := b })),
{'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',{badarg,_}} = (catch <<>>#{nonexisting:=val}),
{'EXIT',{badarg,_}} = (catch M0#{<<0:257>> := val}), %% limitation
ok.
t_update_values(Config) when is_list(Config) ->
V0 = id(1337),
M0 = #{ a => 1, val => V0},
V1 = get_val(M0),
M1 = id(M0#{ val := [V0,V1], "wazzup" => 42 }),
[1337, {some_val, 1337}] = get_val(M1),
M2 = id(M1#{ <<42:333>> => 1337 }),
{bin_key,1337} = get_val(M2),
N = 110,
List = [{[I,1,2,3,I],{1,2,3,"wat",I}}|| I <- lists:seq(1,N)],
{_,_,#{val2 := {1,2,3,"wat",N}, val1 := [N,1,2,3,N]}} = lists:foldl(fun
({V2,V3},{Old2,Old3,Mi}) ->
ok = check_val(Mi,Old2,Old3),
#{ val1 := Old2, val2 := Old3 } = Mi,
{V2,V3, Mi#{ val1 := id(V2), val2 := V1, val2 => id(V3)}}
end, {none, none, #{val1=>none,val2=>none}},List),
ok.
t_expand_map_update(Config) when is_list(Config) ->
M = #{<<"hello">> => <<"world">>}#{<<"hello">> := <<"les gens">>},
#{<<"hello">> := <<"les gens">>} = M,
ok.
t_export(Config) when is_list(Config) ->
Raclette = id(#{}),
case brie of brie -> Fromage = Raclette end,
Raclette = Fromage#{},
ok.
check_val(#{val1:=V1, val2:=V2},V1,V2) -> ok.
get_val(#{ <<42:333>> := V }) -> {bin_key, V};
get_val(#{ "wazzup" := _, val := V}) -> V;
get_val(#{ val := V }) -> {some_val, V}.
t_guard_bifs(Config) when is_list(Config) ->
true = map_guard_empty(),
true = map_guard_empty_2(),
true = map_guard_head(#{a=>1}),
false = map_guard_head([]),
true = map_guard_body(#{a=>1}),
false = map_guard_body({}),
true = map_guard_pattern(#{a=>1, <<"hi">> => "hi" }),
false = map_guard_pattern("list"),
true = map_guard_tautology(),
true = map_guard_ill_map_size(),
ok.
map_guard_empty() when is_map(#{}); false -> true.
map_guard_empty_2() when true; #{} andalso false -> true.
map_guard_head(M) when is_map(M) -> true;
map_guard_head(_) -> false.
map_guard_body(M) -> is_map(M).
map_guard_pattern(#{}) -> true;
map_guard_pattern(_) -> false.
map_guard_tautology() when #{} =:= #{}; true -> true.
map_guard_ill_map_size() when true; map_size(0) -> true.
t_guard_sequence(Config) when is_list(Config) ->
{1, "a"} = map_guard_sequence_1(#{seq=>1,val=>id("a")}),
{2, "b"} = map_guard_sequence_1(#{seq=>2,val=>id("b")}),
{3, "c"} = map_guard_sequence_1(#{seq=>3,val=>id("c")}),
{4, "d"} = map_guard_sequence_1(#{seq=>4,val=>id("d")}),
{5, "e"} = map_guard_sequence_1(#{seq=>5,val=>id("e")}),
{1,M1} = map_guard_sequence_2(M1 = id(#{a=>3})),
{2,M2} = map_guard_sequence_2(M2 = id(#{a=>4, b=>4})),
{3,gg,M3} = map_guard_sequence_2(M3 = id(#{a=>gg, b=>4})),
{4,sc,sc,M4} = map_guard_sequence_2(M4 = id(#{a=>sc, b=>3, c=>sc2})),
{5,kk,kk,M5} = map_guard_sequence_2(M5 = id(#{a=>kk, b=>other, c=>sc2})),
%% error case
{'EXIT',{function_clause,_}} = (catch map_guard_sequence_1(#{seq=>6,val=>id("e")})),
{'EXIT',{function_clause,_}} = (catch map_guard_sequence_2(#{b=>5})),
ok.
map_guard_sequence_1(#{seq:=1=Seq, val:=Val}) -> {Seq,Val};
map_guard_sequence_1(#{seq:=2=Seq, val:=Val}) -> {Seq,Val};
map_guard_sequence_1(#{seq:=3=Seq, val:=Val}) -> {Seq,Val};
map_guard_sequence_1(#{seq:=4=Seq, val:=Val}) -> {Seq,Val};
map_guard_sequence_1(#{seq:=5=Seq, val:=Val}) -> {Seq,Val}.
map_guard_sequence_2(#{ a:=3 }=M) -> {1, M};
map_guard_sequence_2(#{ a:=4 }=M) -> {2, M};
map_guard_sequence_2(#{ a:=X, a:=X, b:=4 }=M) -> {3,X,M};
map_guard_sequence_2(#{ a:=X, a:=Y, b:=3 }=M) when X =:= Y -> {4,X,Y,M};
map_guard_sequence_2(#{ a:=X, a:=Y }=M) when X =:= Y -> {5,X,Y,M}.
t_guard_update(Config) when is_list(Config) ->
error = map_guard_update(#{},#{}),
first = map_guard_update(#{}, #{x=>first}),
second = map_guard_update(#{y=>old}, #{x=>second,y=>old}),
third = map_guard_update(#{x=>old,y=>old}, #{x=>third,y=>old}),
ok.
map_guard_update(M1, M2) when M1#{x=>first} =:= M2 -> first;
map_guard_update(M1, M2) when M1#{x=>second} =:= M2 -> second;
map_guard_update(M1, M2) when M1#{x:=third} =:= M2 -> third;
map_guard_update(_, _) -> error.
t_guard_receive(Config) when is_list(Config) ->
M0 = #{ id => 0 },
Pid = spawn_link(fun() -> guard_receive_loop() end),
Big = 36893488147419103229,
B1 = <<"some text">>,
B2 = <<"was appended">>,
B3 = <<B1/binary, B2/binary>>,
#{id:=1, res:=Big} = M1 = call(Pid, M0#{op=>sub,in=>{1 bsl 65, 3}}),
#{id:=2, res:=26} = M2 = call(Pid, M1#{op=>idiv,in=>{53,2}}),
#{id:=3, res:=832} = M3 = call(Pid, M2#{op=>imul,in=>{26,32}}),
#{id:=4, res:=4} = M4 = call(Pid, M3#{op=>add,in=>{1,3}}),
#{id:=5, res:=Big} = M5 = call(Pid, M4#{op=>sub,in=>{1 bsl 65, 3}}),
#{id:=6, res:=B3} = M6 = call(Pid, M5#{op=>"append",in=>{B1,B2}}),
#{id:=7, res:=4} = _ = call(Pid, M6#{op=>add,in=>{1,3}}),
%% update old maps and check id update
#{id:=2, res:=B3} = call(Pid, M1#{op=>"append",in=>{B1,B2}}),
#{id:=5, res:=99} = call(Pid, M4#{op=>add,in=>{33, 66}}),
%% cleanup
done = call(Pid, done),
ok.
call(Pid, M) ->
Pid ! {self(), M}, receive {Pid, Res} -> Res end.
guard_receive_loop() ->
receive
{Pid, #{ id:=Id, op:="append", in:={X,Y}}=M} when is_binary(X), is_binary(Y) ->
Pid ! {self(), M#{ id=>Id+1, res=><<X/binary,Y/binary>>}},
guard_receive_loop();
{Pid, #{ id:=Id, op:=add, in:={X,Y}}} ->
Pid ! {self(), #{ id=>Id+1, res=>X+Y}},
guard_receive_loop();
{Pid, #{ id:=Id, op:=sub, in:={X,Y}}=M} ->
Pid ! {self(), M#{ id=>Id+1, res=>X-Y}},
guard_receive_loop();
{Pid, #{ id:=Id, op:=idiv, in:={X,Y}}=M} ->
Pid ! {self(), M#{ id=>Id+1, res=>X div Y}},
guard_receive_loop();
{Pid, #{ id:=Id, op:=imul, in:={X,Y}}=M} ->
Pid ! {self(), M#{ id=>Id+1, res=>X * Y}},
guard_receive_loop();
{Pid, done} ->
Pid ! {self(), done};
{Pid, Other} ->
Pid ! {error, Other},
guard_receive_loop()
end.
t_list_comprehension(Config) when is_list(Config) ->
[#{k:=1},#{k:=2},#{k:=3}] = id([#{k=>I} || I <- [1,2,3]]),
Ls = id([#{<<2:301>> => I, "wat" => I + 1} || I <- [1,2,3]]),
[#{<<2:301>>:=1,"wat":=2},#{<<2:301>>:=2,"wat":=3},#{<<2:301>>:=3,"wat":=4}] = Ls,
[{1,2},{2,3},{3,4}] = id([{I2,I1} || #{"wat" := I1, <<2:301>> := I2} <- Ls]),
ok.
t_guard_fun(Config) when is_list(Config) ->
F1 = fun
(#{s:=v,v:=V}) -> {v,V};
(#{s:=t,v:={V,V}}) -> {t,V};
(#{s:=l,v:=[V,V]}) -> {l,V}
end,
F2 = fun
(#{s:=T,v:={V,V}}) -> {T,V};
(#{s:=T,v:=[V,V]}) -> {T,V};
(#{s:=T,v:=V}) -> {T,V}
end,
V = <<"hi">>,
{v,V} = F1(#{s=>v,v=>V}),
{t,V} = F1(#{s=>t,v=>{V,V}}),
{l,V} = F1(#{s=>l,v=>[V,V]}),
{v,V} = F2(#{s=>v,v=>V}),
{t,V} = F2(#{s=>t,v=>{V,V}}),
{l,V} = F2(#{s=>l,v=>[V,V]}),
%% error case
case (catch F1(#{s=>none,v=>none})) of
{'EXIT', {function_clause,[{?MODULE,_,[#{s:=none,v:=none}],_}|_]}} -> ok;
{'EXIT', {{case_clause,_},_}} -> {comment,inlined};
Other ->
test_server:fail({no_match, Other})
end.
t_map_sort_literals(Config) when is_list(Config) ->
% test relation
%% size order
true = #{ a => 1, b => 2} < id(#{ a => 1, b => 1, c => 1}),
true = #{ b => 1, a => 1} < id(#{ c => 1, a => 1, b => 1}),
false = #{ c => 1, b => 1, a => 1} < id(#{ c => 1, a => 1}),
%% key order
true = id(#{ a => 1 }) < id(#{ b => 1}),
false = id(#{ b => 1 }) < id(#{ a => 1}),
true = id(#{ a => 1, b => 1, c => 1 }) < id(#{ b => 1, c => 1, d => 1}),
true = id(#{ b => 1, c => 1, d => 1 }) > id(#{ a => 1, b => 1, c => 1}),
true = id(#{ c => 1, b => 1, a => 1 }) < id(#{ b => 1, c => 1, d => 1}),
true = id(#{ "a" => 1 }) < id(#{ <<"a">> => 1}),
false = id(#{ <<"a">> => 1 }) < id(#{ "a" => 1}),
false = id(#{ 1 => 1 }) < id(#{ 1.0 => 1}),
false = id(#{ 1.0 => 1 }) < id(#{ 1 => 1}),
%% value order
true = id(#{ a => 1 }) < id(#{ a => 2}),
false = id(#{ a => 2 }) < id(#{ a => 1}),
false = id(#{ a => 2, b => 1 }) < id(#{ a => 1, b => 3}),
true = id(#{ a => 1, b => 1 }) < id(#{ a => 1, b => 3}),
true = id(#{ "a" => "hi", b => 134 }) == id(#{ b => 134,"a" => "hi"}),
%% lists:sort
SortVs = [#{"a"=>1},#{a=>2},#{1=>3},#{<<"a">>=>4}],
[#{1:=ok},#{a:=ok},#{"a":=ok},#{<<"a">>:=ok}] = lists:sort([#{"a"=>ok},#{a=>ok},#{1=>ok},#{<<"a">>=>ok}]),
[#{1:=3},#{a:=2},#{"a":=1},#{<<"a">>:=4}] = lists:sort(SortVs),
[#{1:=3},#{a:=2},#{"a":=1},#{<<"a">>:=4}] = lists:sort(lists:reverse(SortVs)),
ok.
t_warn_pair_key_overloaded(Config) when is_list(Config) ->
#{ "hi1" := 42 } = id(#{ "hi1" => 1, "hi1" => 42 }),
#{ "hi1" := 1337, "hi2" := [2], "hi3" := 3 } = id(#{
"hi1" => erlang:atom_to_binary(?MODULE,utf8),
"hi1" => erlang:binary_to_atom(<<"wazzup">>,utf8),
"hi1" => erlang:binary_to_float(<<"3.1416">>),
"hi1" => erlang:float_to_binary(3.1416),
"hi2" => erlang:pid_to_list(self()),
"hi3" => erlang:float_to_binary(3.1416),
"hi2" => lists:subtract([1,2],[1]),
"hi3" => +3,
"hi1" => erlang:min(1,2),
"hi1" => erlang:hash({1,2},35),
"hi1" => erlang:phash({1,2},33),
"hi1" => erlang:phash2({1,2},34),
"hi1" => erlang:integer_to_binary(1337),
"hi1" => erlang:binary_to_integer(<<"1337">>),
"hi4" => erlang:float_to_binary(3.1416)
}),
ok.
t_warn_useless_build(Config) when is_list(Config) ->
[#{ a => id(I)} || I <- [1,2,3]],
ok.
t_build_and_match_over_alloc(Config) when is_list(Config) ->
Ls = id([1,2,3]),
V0 = [a|Ls],
M0 = id(#{ "a" => V0 }),
#{ "a" := V1 } = M0,
V2 = id([c|Ls]),
M2 = id(#{ "a" => V2 }),
#{ "a" := V3 } = M2,
{[a,1,2,3],[c,1,2,3]} = id({V1,V3}),
ok.
t_build_and_match_empty_val(Config) when is_list(Config) ->
F = fun(#{ "hi":=_,{1,2}:=_,1337:=_}) -> ok end,
ok = F(id(#{"hi"=>ok,{1,2}=>ok,1337=>ok})),
%% error case
case (catch (F(id(#{"hi"=>ok})))) of
{'EXIT',{function_clause,_}} -> ok;
{'EXIT', {{case_clause,_},_}} -> {comment,inlined};
Other ->
test_server:fail({no_match, Other})
end.
t_build_and_match_val(Config) when is_list(Config) ->
F = fun
(#{ "hi" := first, v := V}) -> {1,V};
(#{ "hi" := second, v := V}) -> {2,V}
end,
{1,"hello"} = F(id(#{"hi"=>first,v=>"hello"})),
{2,"second"} = F(id(#{"hi"=>second,v=>"second"})),
%% error case
case (catch (F(id(#{"hi"=>ok})))) of
{'EXIT',{function_clause,_}} -> ok;
{'EXIT', {{case_clause,_},_}} -> {comment,inlined};
Other ->
test_server:fail({no_match, Other})
end.
t_build_and_match_nil(Config) when is_list(Config) ->
%% literals removed the coverage
V1 = id(cookie),
V2 = id(cake),
V3 = id(crisps),
#{ [] := V1, "treat" := V2, {your,treat} := V3 } = id(#{
{your,treat} => V3,
"treat" => V2,
[] => V1 }),
#{ [] := V3, [] := V3 } = id(#{ [] => V1, [] => V3 }),
ok.
t_build_and_match_structure(Config) when is_list(Config) ->
V2 = id("it"),
S = id([42,{"hi", "=)", #{ "a" => 42, any => any, val => "get_" ++ V2}}]),
%% match deep map values
V2 = case S of
[42,{"hi",_, #{ "a" := 42, val := "get_" ++ V1, any := _ }}] -> V1
end,
%% match deep map
ok = case S of
[42,{"hi",_, #{ }}] -> ok
end,
ok.
%% simple build and match variables
t_build_and_match_variables(Config) when is_list(Config) ->
K0 = id(#{}),
K1 = id(1), V1 = id(a),
K2 = id(2), V2 = id(b),
K3 = id(3), V3 = id("c"),
K4 = id("4"), V4 = id("d"),
K5 = id(<<"5">>), V5 = id(<<"e">>),
K6 = id({"6",7}), V6 = id("f"),
K7 = id(#{ "a" => 3 }),
#{K1:=V1} = id(#{K1=>V1}),
#{K1:=V1,K2:=V2} = id(#{K1=>V1,K2=>V2}),
#{K1:=V1,K2:=V2,K3:=V3} = id(#{K1=>V1,K2=>V2,K3=>V3}),
#{K1:=V1,K2:=V2,K3:=V3,K4:=V4} = id(#{K1=>V1,K2=>V2,K3=>V3,K4=>V4}),
#{K1:=V1,K2:=V2,K3:=V3,K4:=V4,K5:=V5} = id(#{K1=>V1,K2=>V2,K3=>V3,K4=>V4,K5=>V5}),
#{K1:=V1,K2:=V2,K3:=V3,K4:=V4,K5:=V5,K6:=V6} = id(#{K1=>V1,K2=>V2,K3=>V3,K4=>V4,K5=>V5,K6=>V6}),
#{K5:=X,K5:=X=3,K4:=4} = id(#{K5=>3,K4=>4}),
#{K5:=X,<<"5">>:=X=3,K4:=4} = id(#{K5=>3,K4=>4}),
#{K5:=X,<<"5">>:=X=3,K4:=4} = id(#{<<"5">>=>3,K4=>4}),
#{ K4:=#{ K3:=#{K1:=V1, K2:=V2}}, K5:=V5} =
id(#{ K5=>V5, K4=>#{ K3=>#{K2 => V2, K1 => V1}}}),
#{ K4 := #{ K5 := Res }, K6 := Res} = id(#{K4=>#{K5 => 99}, K6 => 99}),
%% has keys
#{a :=_,b :=_,K1:=_,K2:=_,K3:=V3,K4:=ResKey,K4:=ResKey,"4":=ResKey,"4":="ok"} =
id(#{ a=>1, b=>1, K1=>V1, K2=>V2, K3=>V3, K4=>"nope", "4"=>"ok" }),
%% function
ok = match_function_map_neg_keys(#{ -1 => a, -2 => b, -3 => c }),
%% map key
#{ K0 := 42 } = id(#{ K0 => 42 }),
#{ K7 := 42 } = id(#{ K7 => 42 }),
%% nil key
KNIL = id([]),
#{KNIL:=ok,1:=2} = id(#{KNIL=>ok,1=>2}),
Bin = <<0:258>>,
#{ Bin := "three" } = id(#{<<0:258>> =>"three"}),
%% error case
{'EXIT',{{badmatch,_},_}} = (catch (#{K5:=3,x:=2} = id(#{K5=>3}))),
{'EXIT',{{badmatch,_},_}} = (catch (#{K5:=2} = id(#{K5=>3}))),
{'EXIT',{{badmatch,_},_}} = (catch (#{K5:=3} = id({a,b,c}))),
{'EXIT',{{badmatch,_},_}} = (catch (#{K5:=3} = id(#{K6=>3}))),
{'EXIT',{{badmatch,_},_}} = (catch (#{K5:=3} = id(K7))),
{'EXIT',{{badmatch,_},_}} = (catch (#{K7:=3} = id(#{K7=>42}))),
ok.
match_function_map_neg_keys(#{ -1 := a, -2 := b, -3 := c }) -> ok.
t_update_assoc_variables(Config) when is_list(Config) ->
K1 = id(1),
K2 = id(2),
K3 = id(3.0),
K4 = id(4),
K5 = id(5),
K6 = id(2.0),
M0 = #{K1=>a,K2=>b,K3=>c,K4=>d,K5=>e},
M1 = M0#{K1=>42,K2=>100,K4=>[a,b,c]},
#{1:=42,2:=100,3.0:=c,4:=[a,b,c],5:=e} = M1,
#{1:=42,2:=b,4:=d,5:=e,2.0:=100,K3:=c,4.0:=[a,b,c]} = M0#{1.0=>float,1:=42,2.0=>wrong,K6=>100,4.0=>[a,b,c]},
M2 = M0#{K3=>new},
#{1:=a,2:=b,K3:=new,4:=d,5:=e} = M2,
M2 = M0#{3.0:=wrong,K3=>new},
#{ <<0:258>> := val } = id(M0#{<<0:258>> => val}), %% binary limitation
%% Errors cases.
BadMap = id(badmap),
{'EXIT',{badarg,_}} = (catch BadMap#{nonexisting=>val}),
{'EXIT',{badarg,_}} = (catch <<>>#{nonexisting=>val}),
ok.
t_update_exact_variables(Config) when is_list(Config) ->
K1 = id(1),
K2 = id(2),
K3 = id(3.0),
K4 = id(4),
M0 = id(#{1=>a,2=>b,3.0=>c,4=>d,5=>e}),
M1 = M0#{K1:=42,K2:=100,K4:=[a,b,c]},
#{1:=42,2:=100,3.0:=c,K4:=[a,b,c],5:=e} = M1,
M1 = M0#{K1:=wrong,1:=also_wrong,K1=>42,2=>wrong,K2:=100,4:=[a,b,c]},
M2 = M0#{K3:=new},
#{1:=a,K2:=b,3.0:=new,K4:=d,5:=e} = M2,
M2 = M0#{3.0=>wrong,K3:=new},
true = M2 =/= M0#{3=>right,3.0:=new},
#{ 3 := right, 3.0 := new } = M0#{3=>right,K3:=new},
M3 = id(#{ 1 => val}),
#{1 := update2,1.0 := new_val4} = M3#{
1.0 => new_val1, K1 := update, K1=> update3,
K1 := update2, 1.0 := new_val2, 1.0 => new_val3,
1.0 => new_val4 },
#{ "wat" := 3, 2 := a } = id(#{ "wat" => 1, K2 => 2 }#{ K2 := a, "wat" := 3 }),
%% Errors cases.
{'EXIT',{badarg,_}} = (catch ((id(nil))#{ a := b })),
{'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',{badarg,_}} = (catch <<>>#{nonexisting:=val}),
{'EXIT',{badarg,_}} = (catch M0#{<<0:257>> := val}), %% limitation
ok.
t_nested_pattern_expressions(Config) when is_list(Config) ->
K1 = id("hello"),
%K2 = id({ok}),
[_,_,#{ <<"hi">> := wat, K1 := 42 }|_] = id([k,k,#{<<"hi">> => wat, K1 => 42}]),
[_,_,#{ -1 := wat, K1 := 42 }|_] = id([k,k,#{-1 => wat, K1 => 42}]),
[_,_,{#{ -1 := #{ {-3,<<0:300>>} := V1 }, K1 := 42 },3}|_] = id([k,k,{#{-1 => #{{-3,<<0:300>>}=>"hi"}, K1 => 42},3}]),
"hi" = V1,
%[k,#{ {-1,K1,[]} := {wat,K1}, K2 := 42 }|_] = id([k,#{{-1,K1,[]} => {wat,K1}, K2 => 42}]),
%[k,#{ [-1,K2,[]] := {wat,K1}, K1 := 42 }|_] = id([k,#{[-1,K2,[]] => {wat,K1}, K1 => 42}]),
M0 = id(#{ <<33:333>> => 1, <<332:333>> => ok, a => ok, wat => yep, watzor => ok }),
F0 = map_nested_pattern_funs(M0),
F1 = F0(wat),
F2 = F1(watzor),
{yep,ok} = F2(M0),
ok.
map_nested_pattern_funs(M) ->
K0 = id(a),
fun(K1) ->
case M of
#{ K0 := ok, K1 := yep, <<33:333>> := 1 } ->
fun(K2) ->
case M of
#{ K2 := ok, K1 := yep, <<33:333>> := 1 } ->
fun
(#{ <<332:333>> := ok, K1 := V1, K2 := V2 }) ->
{V1,V2}
end
end
end
end
end.
t_guard_update_variables(Config) when is_list(Config) ->
error = map_guard_update_variables(n,#{},#{}),
first = map_guard_update_variables(x,#{}, #{x=>first}),
second = map_guard_update_variables(x,#{y=>old}, #{x=>second,y=>old}),
third = map_guard_update_variables(x,#{x=>old,y=>old}, #{x=>third,y=>old}),
fourth = map_guard_update_variables(x,#{x=>old,y=>old}, #{x=>4,y=>new}),
ok.
map_guard_update_variables(K,M1,M2) when M1#{K=>first} =:= M2 -> first;
map_guard_update_variables(K,M1,M2) when M1#{K=>second} =:= M2 -> second;
map_guard_update_variables(K,M1,M2) when M1#{K:=third} =:= M2 -> third;
map_guard_update_variables(K,M1,M2) when M1#{K:=4,y=>new} =:= M2 -> fourth;
map_guard_update_variables(_,_,_) -> error.
t_guard_sequence_variables(Config) when is_list(Config) ->
{1,"a"} = map_guard_sequence_var_1(a,#{seq=>1,a=>id("a"),b=>no}),
{2,"b"} = map_guard_sequence_var_1(b,#{seq=>2,b=>id("b"),a=>no}),
{3,"c"} = map_guard_sequence_var_1(a,#{seq=>3,a=>id("c"),b=>no}),
{4,"d"} = map_guard_sequence_var_1(b,#{seq=>4,b=>id("d"),a=>no}),
{4,4} = map_guard_sequence_var_1(seq,#{seq=>4}),
{4,4,y} = map_guard_sequence_var_1(seq,#{seq=>4,b=>id("d"),a=>y}),
{5,"d"} = map_guard_sequence_var_1(b,#{seq=>5,b=>id("d"),a=>y}),
%% error case
{'EXIT',{{case_clause,_},_}} = (catch map_guard_sequence_var_1("a",#{seq=>4,val=>id("e")})),
ok.
map_guard_sequence_var_1(K,M) ->
case M of
#{seq:=1=Seq, K:=Val} -> {Seq,Val};
#{seq:=2=Seq, K:=Val} -> {Seq,Val};
#{seq:=3=Seq, K:=Val} -> {Seq,Val};
#{K:=4=Seq, K:=Val1,a:=Val2} -> {Seq,Val1,Val2};
#{seq:=4=Seq, K:=Val} -> {Seq,Val};
#{K:=4=Seq, K:=Val} -> {Seq,Val};
#{seq:=5=Seq, K:=Val} -> {Seq,Val}
end.
t_guard_sequence_mixed(Config) when is_list(Config) ->
M0 = id(#{ a=>1, b=>1, c=>1, d=>1, e=>1, f=>1, g=>1, h=>1 }),
M1 = id(M0#{ d := 3 }),
1 = map_guard_sequence_mixed(a,d,M1),
M2 = id(M1#{ b := 2, d := 4, h := 2 }),
2 = map_guard_sequence_mixed(a,d,M2),
M3 = id(M2#{ b := 3, e := 5, g := 3 }),
3 = map_guard_sequence_mixed(a,e,M3),
M4 = id(M3#{ c := 4, e := 6, h := 1 }),
4 = map_guard_sequence_mixed(a,e,M4),
M5 = id(M4#{ c := 5, f := 7, g := 2 }),
5 = map_guard_sequence_mixed(a,f,M5),
M6 = id(M5#{ c := 6, f := 8, h := 3 }),
6 = map_guard_sequence_mixed(a,f,M6),
%% error case
{'EXIT',{{case_clause,_},_}} = (catch map_guard_sequence_mixed(a,b,M0)),
ok.
map_guard_sequence_mixed(K1,K2,M) ->
case M of
#{ K1 := 1, b := 1, K2 := 3, g := 1} -> 1;
#{ K1 := 1, b := 2, K2 := 4, h := 2} -> 2;
#{ K1 := 1, b := 3, K2 := 5, g := 3} -> 3;
#{ K1 := 1, c := 4, K2 := 6, h := 1} -> 4;
#{ K1 := 1, c := 5, K2 := 7, g := 2} -> 5;
#{ K1 := 1, c := 6, K2 := 8, h := 3} -> 6
end.
t_frequency_table(Config) when is_list(Config) ->
random:seed({13,1337,54}), % pseudo random
N = 100000,
Ts = rand_terms(N),
#{ n:=N, tf := Tf } = frequency_table(Ts,#{ n=>0, tf => #{}}),
ok = check_frequency(Ts,Tf),
ok.
frequency_table([T|Ts], M) ->
case M of
#{ n := N, tf := #{ T := C } = F } ->
frequency_table(Ts,M#{ n := N + 1, tf := F#{ T := C + 1 }});
#{ n := N, tf := F } ->
frequency_table(Ts,M#{ n := N + 1, tf := F#{ T => 1 }})
end;
frequency_table([], M) -> M.
check_frequency(Ts,Tf) ->
check_frequency(Ts,Tf,dict:new()).
check_frequency([T|Ts],Tf,D) ->
case dict:find(T,D) of
error -> check_frequency(Ts,Tf,dict:store(T,1,D));
{ok,C} -> check_frequency(Ts,Tf,dict:store(T,C+1,D))
end;
check_frequency([],Tf,D) ->
validate_frequency(dict:to_list(D),Tf).
validate_frequency([{T,C}|Fs],Tf) ->
case Tf of
#{ T := C } -> validate_frequency(Fs,Tf);
_ -> error
end;
validate_frequency([], _) -> ok.
%% aux
rand_terms(0) -> [];
rand_terms(N) -> [rand_term()|rand_terms(N-1)].
rand_term() ->
case random:uniform(6) of
1 -> rand_binary();
2 -> rand_number();
3 -> rand_atom();
4 -> rand_tuple();
5 -> rand_list();
6 -> rand_map()
end.
rand_binary() ->
case random:uniform(3) of
1 -> <<>>;
2 -> <<"hi">>;
3 -> <<"message text larger than 64 bytes. yep, message text larger than 64 bytes.">>
end.
rand_number() ->
case random:uniform(3) of
1 -> random:uniform(5);
2 -> float(random:uniform(5));
3 -> 1 bsl (63 + random:uniform(3))
end.
rand_atom() ->
case random:uniform(3) of
1 -> hi;
2 -> some_atom;
3 -> some_other_atom
end.
rand_tuple() ->
case random:uniform(3) of
1 -> {ok, rand_term()}; % careful
2 -> {1, 2, 3};
3 -> {<<"yep">>, 1337}
end.
rand_list() ->
case random:uniform(3) of
1 -> "hi";
2 -> [1,rand_term()]; % careful
3 -> [improper|list]
end.
rand_map() ->
case random:uniform(3) of
1 -> #{ hi => 3 };
2 -> #{ wat => rand_term(), other => 3 }; % careful
3 -> #{ hi => 42, other => 42, yet_anoter => 1337 }
end.
%% Use this function to avoid compile-time evaluation of an expression.
id(I) -> I.
