aboutsummaryrefslogblamecommitdiffstats
path: root/lib/stdlib/test/erl_eval_SUITE.erl
blob: a750c5cace7ac6d356ff71f4a4705e81769083ce (plain) (tree)
1
2
3
4
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980


                   
                                                        














                                                                         

                                                                    





                              
                                         










                        
                     

                     
                       
                      

                   

















                                                     
                                                    
                                                   




                                                      
                                  




                                     
                                         

         
                                                      
                                                            

                                                      
                                                                   
                   
 


            





                         
                                     
           

                                    
           
 























































































































                                                                                  






                                                                      






                                                                              




                                                                   








                                                                            













                                                                           






































































































































































































































































































































                                                                             










                                                                   

























































































































































































































































































































































































                                                                                 
 



















                                                                  









                                                                 
                          






























                                                                       























































                                                                             





                                                        



                                                      


































                                                                          






























                                                                          




                                                     














































                                                                              


















                                                        
                                                  








                                                            
                                                                         


























































































































































                                                                            







                                                                               




















                                                                              











                                                            






                                                          























                                                                        

                                                                       
                                          

                                                                     

       






































































                                                                             
%%
%% %CopyrightBegin%
%% 
%% Copyright Ericsson AB 1998-2013. 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(erl_eval_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([guard_1/1, guard_2/1,
	 match_pattern/1,
	 match_bin/1,
	 string_plusplus/1,
	 pattern_expr/1,
         guard_3/1, guard_4/1, guard_5/1,
         lc/1,
         simple_cases/1,
         unary_plus/1,
         apply_atom/1,
         otp_5269/1,
         otp_6539/1,
         otp_6543/1,
         otp_6787/1,
         otp_6977/1,
	 otp_7550/1,
         otp_8133/1,
         otp_10622/1,
         funs/1,
	 try_catch/1,
	 eval_expr_5/1,
	 zero_width/1,
         eep37/1,
         eep43/1]).

%%
%% Define to run outside of test server
%%
%%-define(STANDALONE,1).

-import(lists,[concat/1, sort/1]).

-export([count_down/2, count_down_fun/0, do_apply/2, 
         local_func/3, local_func_value/2]).

-ifdef(STANDALONE).
-define(config(A,B),config(A,B)).
-export([config/2]).
-define(line, noop, ).
config(priv_dir,_) ->
    ".".
-else.
-include_lib("test_server/include/test_server.hrl").
-export([init_per_testcase/2, end_per_testcase/2]).
% Default timetrap timeout (set in init_per_testcase).
-define(default_timeout, ?t:minutes(1)).
init_per_testcase(_Case, Config) ->
    ?line Dog = ?t:timetrap(?default_timeout),
    [{watchdog, Dog} | Config].
end_per_testcase(_Case, Config) ->
    Dog = ?config(watchdog, Config),
    test_server:timetrap_cancel(Dog),
    ok.
-endif.

suite() -> [{ct_hooks,[ts_install_cth]}].

all() -> 
    [guard_1, guard_2, match_pattern, string_plusplus,
     pattern_expr, match_bin, guard_3, guard_4, guard_5, lc,
     simple_cases, unary_plus, apply_atom, otp_5269,
     otp_6539, otp_6543, otp_6787, otp_6977, otp_7550,
     otp_8133, otp_10622, funs, try_catch, eval_expr_5, zero_width,
     eep37, eep43].

groups() -> 
    [].

init_per_suite(Config) ->
    Config.

end_per_suite(_Config) ->
    ok.

init_per_group(_GroupName, Config) ->
    Config.

end_per_group(_GroupName, Config) ->
    Config.

guard_1(doc) ->
    ["(OTP-2405)"];
guard_1(suite) ->
    [];
guard_1(Config) when is_list(Config) ->
    ?line {ok,Tokens ,_} =
	erl_scan:string("if a+4 == 4 -> yes; true -> no end. "),
    ?line {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
    ?line no = guard_1_compiled(),
    ?line {value, no, []} = erl_eval:expr(Expr, []),
    ok.

guard_1_compiled() ->
    if a+4 == 4 -> yes; true -> no end.

guard_2(doc) ->
    ["Similar to guard_1, but type-correct"];
guard_2(suite) ->
    [];
guard_2(Config) when is_list(Config) ->
    ?line {ok,Tokens ,_} =
	erl_scan:string("if 6+4 == 4 -> yes; true -> no end. "),
    ?line {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
    ?line no = guard_2_compiled(),
    ?line {value, no, []} = erl_eval:expr(Expr, []),
    ok.

guard_2_compiled() ->
    if 6+4 == 4 -> yes; true -> no end.

string_plusplus(doc) ->
    ["OTP-3069: syntactic sugar string ++ ..."];
string_plusplus(suite) ->
    [];
string_plusplus(Config) when is_list(Config) ->
    ?line check(fun() -> case "abc" of "ab" ++ L -> L end end,
		"case \"abc\" of \"ab\" ++ L -> L end. ",
		"c"),
    ?line check(fun() -> case "abcde" of "ab" ++ "cd" ++ L -> L end end,
		"case \"abcde\" of \"ab\" ++ \"cd\" ++ L -> L end. ",
		"e"),
    ?line check(fun() -> case "abc" of [97, 98] ++ L -> L end end,
		"case \"abc\" of [97, 98] ++ L -> L end. ",
		"c"),
    ok.

match_pattern(doc) ->
    ["OTP-2983: match operator in pattern"];
match_pattern(suite) ->
    [];
match_pattern(Config) when is_list(Config) ->
    ?line check(fun() -> case {a, b} of {a, _X}=Y -> {x,Y} end end,
		"case {a, b} of {a, X}=Y -> {x,Y} end. ",
		{x, {a, b}}),
    ?line check(fun() -> case {a, b} of Y={a, _X} -> {x,Y} end end,
		"case {a, b} of Y={a, X} -> {x,Y} end. ",
		{x, {a, b}}),
    ?line check(fun() -> case {a, b} of Y={a, _X}=Z -> {Z,Y} end end,
		"case {a, b} of Y={a, X}=Z -> {Z,Y} end. ",
		{{a, b}, {a, b}}),
    ?line check(fun() -> A = 4, B = 28, <<13:(A+(X=B))>>, X end,
                "begin A = 4, B = 28, <<13:(A+(X=B))>>, X end.",
                28),
    ok.

match_bin(doc) ->
    ["binary match problems"];
match_bin(suite) ->
    [];
match_bin(Config) when is_list(Config) ->
    ?line check(fun() -> <<"abc">> = <<"abc">> end,
		"<<\"abc\">> = <<\"abc\">>. ",
		<<"abc">>),
    ?line check(fun() ->
			<<Size,B:Size/binary,Rest/binary>> = <<2,"AB","CD">>,
			{Size,B,Rest}
		end,
		"begin <<Size,B:Size/binary,Rest/binary>> = <<2,\"AB\",\"CD\">>, "
		"{Size,B,Rest} end. ",
		{2,<<"AB">>,<<"CD">>}),
    ok.

pattern_expr(doc) ->
    ["OTP-3144: compile-time expressions in pattern"];
pattern_expr(suite) ->
    [];
pattern_expr(Config) when is_list(Config) ->
    ?line check(fun() -> case 4 of 2+2 -> ok end end,
		"case 4 of 2+2 -> ok end. ",
		ok),
    ?line check(fun() -> case 2 of +2 -> ok end end,
		"case 2 of +2 -> ok end. ",
		ok),
    ok.

guard_3(doc) ->
    ["OTP-4518."];
guard_3(suite) ->
    [];
guard_3(Config) when is_list(Config) ->
    ?line check(fun() -> if false -> false; true -> true end end,
                "if false -> false; true -> true end.",
                true),
    ?line check(fun() -> if <<"hej">> == <<"hopp">> -> true; 
                            true -> false end end,
                "begin if <<\"hej\">> == <<\"hopp\">> -> true; 
                          true -> false end end.",
                false),
    ?line check(fun() -> if <<"hej">> == <<"hej">> -> true; 
                            true -> false end end,
                "begin if <<\"hej\">> == <<\"hej\">> -> true; 
                          true -> false end end.",
                true),
    ok.

guard_4(doc) ->
    ["OTP-4885."];
guard_4(suite) ->
    [];
guard_4(Config) when is_list(Config) ->
    check(fun() -> if erlang:'+'(3,a) -> true ; true -> false end end,
	  "if erlang:'+'(3,a) -> true ; true -> false end.",
	  false),
    check(fun() -> if erlang:is_integer(3) -> true ; true -> false end
	  end,
	  "if erlang:is_integer(3) -> true ; true -> false end.",
	  true),
    ?line check(fun() -> [X || X <- [1,2,3], erlang:is_integer(X)] end,
                "[X || X <- [1,2,3], erlang:is_integer(X)].",
                [1,2,3]),
    ?line check(fun() -> if is_atom(is_integer(a)) -> true ; true -> false end
                end,
                "if is_atom(is_integer(a)) -> true ; true -> false end.",
                true),
    check(fun() -> if erlang:is_atom(erlang:is_integer(a)) -> true;
		      true -> false end end,
	  "if erlang:is_atom(erlang:is_integer(a)) -> true; "
	  "true -> false end.",
	  true),
    ?line check(fun() -> if is_atom(3+a) -> true ; true -> false end end,
                "if is_atom(3+a) -> true ; true -> false end.",
                false),
    ?line check(fun() -> if erlang:is_atom(3+a) -> true ; true -> false end 
                end,
                "if erlang:is_atom(3+a) -> true ; true -> false end.",
                false),
    ok.

guard_5(doc) ->
    ["Guards with erlang:'=='/2"];
guard_5(suite) ->
    [];
guard_5(Config) when is_list(Config) ->
    {ok,Tokens ,_} =
	erl_scan:string("case 1 of A when erlang:'=='(A, 1) -> true end."),
    {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
    true = guard_5_compiled(),
    {value, true, [{'A',1}]} = erl_eval:expr(Expr, []),
    ok.

guard_5_compiled() ->
    case 1 of A when erlang:'=='(A, 1) -> true end.

lc(doc) ->
    ["OTP-4518."];
lc(suite) ->
    [];
lc(Config) when is_list(Config) ->
    ?line check(fun() -> X = 32, [X || X <- [1,2,3]] end,
                "begin X = 32, [X || X <- [1,2,3]] end.",
                [1,2,3]),
    ?line check(fun() -> X = 32, 
                         [X || <<X:X>> <- [<<1:32>>,<<2:32>>,<<3:8>>]] end,
    %% "binsize variable"          ^
                "begin X = 32, 
                 [X || <<X:X>> <- [<<1:32>>,<<2:32>>,<<3:8>>]] end.",
                [1,2]),
    ?line check(fun() -> Y = 13,[X || {X,Y} <- [{1,2}]] end,
                "begin Y = 13,[X || {X,Y} <- [{1,2}]] end.",
                [1]),
    ?line error_check("begin [A || X <- [{1,2}], 1 == A] end.",
                      {unbound_var,'A'}),
    ?line error_check("begin X = 32, 
                        [{Y,W} || X <- [1,2,32,Y=4], Z <- [1,2,W=3]] end.",
                      {unbound_var,'Y'}),
    ?line error_check("begin X = 32,<<A:B>> = <<100:X>> end.",
                      {unbound_var,'B'}),
    ?line check(fun() -> [X || X <- [1,2,3,4], not (X < 2)] end,
                "begin [X || X <- [1,2,3,4], not (X < 2)] end.",
                [2,3,4]),
    ?line check(fun() -> [X || X <- [true,false], X] end,
                "[X || X <- [true,false], X].", [true]),
    ok.

simple_cases(doc) ->
    ["Simple cases, just to cover some code."];
simple_cases(suite) ->
    [];
simple_cases(Config) when is_list(Config) ->
    ?line check(fun() -> A = $C end, "A = $C.", $C),
    %% ?line check(fun() -> A = 3.14 end, "A = 3.14.", 3.14),
    ?line check(fun() -> self() ! a, A = receive a -> true end end,
                "begin self() ! a, A = receive a -> true end end.",
                true),
    ?line check(fun() -> c:flush(), self() ! a, self() ! b, self() ! c,
                         receive b -> b end, 
                         {messages, [a,c]} =
                             erlang:process_info(self(), messages),
                         c:flush() end,
                "begin c:flush(), self() ! a, self() ! b, self() ! c,"
                "receive b -> b end,"
                "{messages, [a,c]} ="
                "     erlang:process_info(self(), messages), c:flush() end.",
                ok),
    ?line check(fun() -> self() ! a, A = receive a -> true 
                                         after 0 -> false end end,
                "begin self() ! a, A = receive a -> true"
                "                      after 0 -> false end end.",
                true),
    ?line check(fun() -> c:flush(), self() ! a, self() ! b, self() ! c,
                         receive b -> b after 0 -> true end, 
                         {messages, [a,c]} =
                             erlang:process_info(self(), messages),
                         c:flush() end,
                "begin c:flush(), self() ! a, self() ! b, self() ! c,"
                "receive b -> b after 0 -> true end,"
                "{messages, [a,c]} ="
                "     erlang:process_info(self(), messages), c:flush() end.",
                ok),
    ?line check(fun() -> receive _ -> true after 10 -> false end end,
                "receive _ -> true after 10 -> false end.",
                false),
    ?line check(fun() -> F = fun(A) -> A end, true = 3 == F(3) end,
                "begin F = fun(A) -> A end, true = 3 == F(3) end.",
                true),
    ?line check(fun() -> F = fun(A) -> A end, true = 3 == apply(F, [3]) end,
                "begin F = fun(A) -> A end, true = 3 == apply(F,[3]) end.",
                true),
    ?line check(fun() -> catch throw(a) end, "catch throw(a).", a),
    ?line check(fun() -> catch a end, "catch a.", a),
    ?line check(fun() -> 4 == 3 end, "4 == 3.", false),
    ?line check(fun() -> not true end, "not true.", false),
    ?line check(fun() -> -3 end, "-3.", -3),

    ?line error_check("3.0 = 4.0.", {badmatch,4.0}),
    ?line check(fun() -> <<(3.0+2.0):32/float>> = <<5.0:32/float>> end,
                "<<(3.0+2.0):32/float>> = <<5.0:32/float>>.",
                <<5.0:32/float>>),

    ?line check(fun() -> false andalso kludd end, "false andalso kludd.",
                false),
    ?line check(fun() -> true andalso true end, "true andalso true.",
                true),
    ?line check(fun() -> true andalso false end, "true andalso false.",
                false),
    ?line check(fun() -> true andalso kludd end, "true andalso kludd.",
                kludd),
    ?line error_check("kladd andalso kludd.", {badarg,kladd}),

    ?line check(fun() -> if false andalso kludd -> a; true -> b end end,
                "if false andalso kludd -> a; true -> b end.",
                b),
    ?line check(fun() -> if true andalso true -> a; true -> b end end, 
                "if true andalso true -> a; true -> b end.",
                a),
    ?line check(fun() -> if true andalso false -> a; true -> b end end, 
                "if true andalso false -> a; true -> b end.",
                b),

    ?line check(fun() -> true orelse kludd end, 
                "true orelse kludd.", true),
    ?line check(fun() -> false orelse false end, 
                "false orelse false.", false),
    ?line check(fun() -> false orelse true end, 
                "false orelse true.", true),
    ?line check(fun() -> false orelse kludd end, 
                "false orelse kludd.", kludd),
    ?line error_check("kladd orelse kludd.", {badarg,kladd}),
    ?line error_check("[X || X <- [1,2,3], begin 1 end].",{bad_filter,1}),
    ?line error_check("[X || X <- a].",{bad_generator,a}),

    ?line check(fun() -> if true orelse kludd -> a; true -> b end end, 
                "if true orelse kludd -> a; true -> b end.", a),
    ?line check(fun() -> if false orelse false -> a; true -> b end end, 
                "if false orelse false -> a; true -> b end.", b),
    ?line check(fun() -> if false orelse true -> a; true -> b end end, 
                "if false orelse true -> a; true -> b end.", a),

    ?line check(fun() -> [X || X <- [1,2,3], X+2] end,
                "[X || X <- [1,2,3], X+2].", []),

    ?line check(fun() -> [X || X <- [1,2,3], [X] == [X || X <- [2]]] end,
                "[X || X <- [1,2,3], [X] == [X || X <- [2]]].",
                [2]),
    ?line check(fun() -> F = fun(1) -> ett; (2) -> zwei end, 
                         ett = F(1), zwei = F(2) end,
                "begin F = fun(1) -> ett; (2) -> zwei end, 
                         ett = F(1), zwei = F(2) end.",
                zwei),
    ?line check(fun() -> F = fun(X) when X == 1 -> ett; 
                                (X) when X == 2 -> zwei end, 
                         ett = F(1), zwei = F(2) end,
                "begin F = fun(X) when X == 1 -> ett; 
                              (X) when X == 2 -> zwei end, 
                         ett = F(1), zwei = F(2) end.",
                zwei),
    ?line error_check("begin F = fun(1) -> ett end, zwei = F(2) end.",
                      function_clause),
    ?line check(fun() -> if length([1]) == 1 -> yes; 
                            true -> no end end,
                "if length([1]) == 1 -> yes; 
                            true -> no end.",
                yes),
    ?line check(fun() -> if is_integer(3) -> true; true -> false end end,
                "if is_integer(3) -> true; true -> false end.", true),
    ?line check(fun() -> if integer(3) -> true; true -> false end end,
                "if integer(3) -> true; true -> false end.", true),
    ?line check(fun() -> if is_float(3) -> true; true -> false end end,
                "if is_float(3) -> true; true -> false end.", false),
    ?line check(fun() -> if float(3) -> true; true -> false end end,
                "if float(3) -> true; true -> false end.", false),
    ?line check(fun() -> if is_number(3) -> true; true -> false end end,
                "if is_number(3) -> true; true -> false end.", true),
    ?line check(fun() -> if number(3) -> true; true -> false end end,
                "if number(3) -> true; true -> false end.", true),
    ?line check(fun() -> if is_atom(a) -> true; true -> false end end,
                "if is_atom(a) -> true; true -> false end.", true),
    ?line check(fun() -> if atom(a) -> true; true -> false end end,
                "if atom(a) -> true; true -> false end.", true),
    ?line check(fun() -> if is_list([]) -> true; true -> false end end,
                "if is_list([]) -> true; true -> false end.", true),
    ?line check(fun() -> if list([]) -> true; true -> false end end,
                "if list([]) -> true; true -> false end.", true),
    ?line check(fun() -> if is_tuple({}) -> true; true -> false end end,
                "if is_tuple({}) -> true; true -> false end.", true),
    ?line check(fun() -> if tuple({}) -> true; true -> false end end,
                "if tuple({}) -> true; true -> false end.", true),
    ?line check(fun() -> if is_pid(self()) -> true; true -> false end end,
                "if is_pid(self()) -> true; true -> false end.", true),
    ?line check(fun() -> if pid(self()) -> true; true -> false end end,
                "if pid(self()) -> true; true -> false end.", true),
    ?line check(fun() -> R = make_ref(), if is_reference(R) -> true; 
                                            true -> false end end,
                "begin R = make_ref(), if is_reference(R) -> true;"
                "true -> false end end.", true),
    ?line check(fun() -> R = make_ref(), if reference(R) -> true; 
                                            true -> false end end,
                "begin R = make_ref(), if reference(R) -> true;"
                "true -> false end end.", true),
    ?line check(fun() -> if is_port(a) -> true; true -> false end end,
                "if is_port(a) -> true; true -> false end.", false),
    ?line check(fun() -> if port(a) -> true; true -> false end end,
                "if port(a) -> true; true -> false end.", false),
    ?line check(fun() -> if is_function(a) -> true; true -> false end end,
                "if is_function(a) -> true; true -> false end.", false),
    ?line check(fun() -> if function(a) -> true; true -> false end end,
                "if function(a) -> true; true -> false end.", false),
    ?line check(fun() -> if is_binary(<<>>) -> true; true -> false end end,
                "if is_binary(<<>>) -> true; true -> false end.", true),
    ?line check(fun() -> if binary(<<>>) -> true; true -> false end end,
                "if binary(<<>>) -> true; true -> false end.", true),
    ?line check(fun() -> if is_integer(a) == true -> yes; 
                            true -> no end end,
                "if is_integer(a) == true -> yes; 
                            true -> no end.",
                no),
    ?line check(fun() -> if [] -> true; true -> false end end,
                "if [] -> true; true -> false end.", false),
    ?line error_check("if lists:member(1,[1]) -> true; true -> false end.",
                      illegal_guard_expr),
    ?line error_check("if false -> true end.", if_clause),
    ?line check(fun() -> if a+b -> true; true -> false end end,
                "if a + b -> true; true -> false end.", false),
    ?line check(fun() -> if + b -> true; true -> false end end,
                "if + b -> true; true -> false end.", false),
    ?line error_check("case foo of bar -> true end.", {case_clause,foo}),
    ?line error_check("case 4 of 2+a -> true; _ -> false end.", 
                      illegal_pattern),
    ?line error_check("case 4 of +a -> true; _ -> false end.", 
                      illegal_pattern),
    ?line check(fun() -> case a of 
                             X when X == b -> one;
                             X when X == a -> two
                         end end,
                "begin case a of 
                             X when X == b -> one;
                             X when X == a -> two
                         end end.", two),
    ?line error_check("3 = 4.", {badmatch,4}),
    ?line error_check("a = 3.", {badmatch,3}),
    %% ?line error_check("3.1 = 2.7.",{badmatch,2.7}),
    ?line error_check("$c = 4.", {badmatch,4}),
    ?line check(fun() -> $c = $c end, "$c = $c.", $c),
    ?line check(fun() -> _ = bar end, "_ = bar.", bar),
    ?line check(fun() -> A = 14, A = 14 end, 
                "begin A = 14, A = 14 end.", 14),
    ?line error_check("begin A = 14, A = 16 end.", {badmatch,16}),
    ?line error_check("\"hej\" = \"san\".", {badmatch,"san"}),
    ?line check(fun() -> "hej" = "hej" end,
                "\"hej\" = \"hej\".", "hej"),
    ?line error_check("[] = [a].", {badmatch,[a]}),
    ?line check(fun() -> [] = [] end, "[] = [].", []),
    ?line error_check("[a] = [].", {badmatch,[]}),
    ?line error_check("{a,b} = 34.", {badmatch,34}),
    ?line check(fun() -> <<X:7>> = <<8:7>>, X end,
		"begin <<X:7>> = <<8:7>>, X end.", 8),
    ?line error_check("<<34:32>> = \"hej\".", {badmatch,"hej"}),
    ?line check(fun() -> trunc((1 * 3 div 3 + 4 - 3) / 1) rem 2 end,
                "begin trunc((1 * 3 div 3 + 4 - 3) / 1) rem 2 end.", 0),
    ?line check(fun() -> (2#101 band 2#10101) bor (2#110 bxor 2#010) end,
                "(2#101 band 2#10101) bor (2#110 bxor 2#010).", 5),
    ?line check(fun() -> (2#1 bsl 4) + (2#10000 bsr 3) end,
                "(2#1 bsl 4) + (2#10000 bsr 3).", 18),
    ?line check(fun() -> ((1<3) and ((1 =:= 2) or (1 =/= 2))) xor (1=<2) end,
                "((1<3) and ((1 =:= 2) or (1 =/= 2))) xor (1=<2).", false),
    ?line check(fun() -> (a /= b) or (2 > 4) or (3 >= 3) end,
                "(a /= b) or (2 > 4) or (3 >= 3).", true),
    ?line check(fun() -> "hej" ++ "san" =/= "hejsan" -- "san" end,
                "\"hej\" ++ \"san\" =/= \"hejsan\" -- \"san\".", true),
    ?line check(fun() -> (bnot 1) < -0 end, "(bnot (+1)) < -0.", true),
    ok.

unary_plus(doc) ->
    ["OTP-4929. Unary plus rejects non-numbers."];
unary_plus(suite) ->
    [];
unary_plus(Config) when is_list(Config) ->
    ?line check(fun() -> F = fun(X) -> + X end, 
                         true = -1 == F(-1) end,
                "begin F = fun(X) -> + X end," 
                "      true = -1 == F(-1) end.", true, ['F'], none, none),
    ?line error_check("+a.", badarith),
    ok.

apply_atom(doc) ->
    ["OTP-5064. Can no longer apply atoms."];
apply_atom(suite) ->
    [];
apply_atom(Config) when is_list(Config) ->
    ?line error_check("[X || X <- [[1],[2]], 
                             begin L = length, L(X) =:= 1 end].", 
                      {badfun,length}),
    ok.

otp_5269(doc) ->
    ["OTP-5269. Bugs in the bit syntax."];
otp_5269(suite) ->
    [];
otp_5269(Config) when is_list(Config) ->
    ?line check(fun() -> L = 8,
                         F = fun(<<A:L,B:A>>) -> B end,
                         F(<<16:8, 7:16>>)
                end,
                "begin 
                   L = 8, F = fun(<<A:L,B:A>>) -> B end, F(<<16:8, 7:16>>)
                 end.",
                7),
    ?line check(fun() -> L = 8,
                         F = fun(<<L:L,B:L>>) -> B end,
                         F(<<16:8, 7:16>>)
                end,
                "begin 
                   L = 8, F = fun(<<L:L,B:L>>) -> B end, F(<<16:8, 7:16>>)
                 end.",
                7),
    ?line check(fun() -> L = 8, <<A:L,B:A>> = <<16:8, 7:16>>, B end,
                "begin L = 8, <<A:L,B:A>> = <<16:8, 7:16>>, B end.",
                7),
    ?line error_check("begin L = 8, <<L:L,B:L>> = <<16:8, 7:16>> end.",
                      {badmatch,<<16:8,7:16>>}),
    
    ?line error_check("begin <<L:16,L:L>> = <<16:16,8:16>>, L end.",
                      {badmatch, <<16:16,8:16>>}),
    ?line check(fun() -> U = 8, (fun(<<U:U>>) -> U end)(<<32:8>>) end,
                "begin U = 8, (fun(<<U:U>>) -> U end)(<<32:8>>) end.",
                32),
    ?line check(fun() -> U = 8, [U || <<U:U>> <- [<<32:8>>]] end,
                "begin U = 8, [U || <<U:U>> <- [<<32:8>>]] end.",
                [32]),
    ?line error_check("(fun({3,<<A:32,A:32>>}) -> a end)
                          ({3,<<17:32,19:32>>}).",
                      function_clause),
    ?line check(fun() -> [X || <<A:8,
                                 B:A>> <- [<<16:8,19:16>>],
                               <<X:8>> <- [<<B:8>>]] end,
                "[X || <<A:8,
                                 B:A>> <- [<<16:8,19:16>>],
                               <<X:8>> <- [<<B:8>>]].",
                [19]),
    ?line check(fun() ->
		(fun (<<A:1/binary, B:8/integer, _C:B/binary>>) ->
			    case A of
				B -> wrong;
				_ -> ok
			    end
		 end)(<<1,2,3,4>>) end,
		"(fun(<<A:1/binary, B:8/integer, _C:B/binary>>) ->"
			    " case A of B -> wrong; _ -> ok end"
		" end)(<<1, 2, 3, 4>>).",
		ok),
    ok.

otp_6539(doc) ->
    ["OTP-6539. try/catch bugs."];
otp_6539(suite) ->
    [];
otp_6539(Config) when is_list(Config) ->
    ?line check(fun() -> 
                        F = fun(A,B) -> 
                                    try A+B 
                                    catch _:_ -> dontthinkso 
                                    end 
                            end,
                        lists:zipwith(F, [1,2], [2,3])
                end,
                "begin 
                     F = fun(A,B) -> 
                                 try A+B 
                                 catch _:_ -> dontthinkso 
                                 end 
                         end,
                     lists:zipwith(F, [1,2], [2,3])
                 end.",
                [3, 5]),
    ok.

otp_6543(doc) ->
    ["OTP-6543. bitlevel binaries."];
otp_6543(suite) ->
    [];
otp_6543(Config) when is_list(Config) ->
    ?line check(fun() ->
                        << <<X>> || <<X>> <- [1,2,3] >>
                end,
                "<< <<X>> || <<X>> <- [1,2,3] >>.",
                <<>>),
    ?line check(fun() -> 
                        << <<X>> || X <- [1,2,3] >>
                end,
                "<< <<X>> || X <- [1,2,3] >>.",
                <<1,2,3>>),
    ?line check(fun() -> 
                        << <<X:8>> || <<X:2>> <= <<"hej">> >>
                end,
                "<< <<X:8>> || <<X:2>> <= <<\"hej\">> >>.",
                <<1,2,2,0,1,2,1,1,1,2,2,2>>),
    ?line check(fun() ->
                        << <<X:8>> || 
                            <<65,X:4>> <= <<65,7:4,65,3:4,66,8:4>> >>
                end,
                "<< <<X:8>> || 
                            <<65,X:4>> <= <<65,7:4,65,3:4,66,8:4>> >>.",
                <<7,3>>),
    ?line check(fun() -> <<34:18/big>> end,
                "<<34:18/big>>.",
                <<0,8,2:2>>),
    ?line check(fun() -> <<34:18/big-unit:2>> end,
                "<<34:18/big-unit:2>>.",
                <<0,0,0,2,2:4>>),
    ?line check(fun() -> <<34:18/little>> end,
                "<<34:18/little>>.",
                <<34,0,0:2>>),
    ?line case eval_string("<<34:18/native>>.") of
              <<0,8,2:2>> -> ok;
              <<34,0,0:2>> -> ok
          end,
    ?line check(fun() -> <<34:18/big-signed>> end,
                "<<34:18/big-signed>>.",
                <<0,8,2:2>>),
    ?line check(fun() -> <<34:18/little-signed>> end,
                "<<34:18/little-signed>>.",
                <<34,0,0:2>>),
    ?line case eval_string("<<34:18/native-signed>>.") of
              <<0,8,2:2>> -> ok;
              <<34,0,0:2>> -> ok
          end,
    ?line check(fun() -> <<34:18/big-unsigned>> end,
                "<<34:18/big-unsigned>>.",
                <<0,8,2:2>>),
    ?line check(fun() -> <<34:18/little-unsigned>> end,
                "<<34:18/little-unsigned>>.",
                <<34,0,0:2>>),
    ?line case eval_string("<<34:18/native-unsigned>>.") of
              <<0,8,2:2>> -> ok;
              <<34,0,0:2>> -> ok
          end,
    ?line check(fun() -> <<3.14:32/float-big>> end,
                "<<3.14:32/float-big>>.",
                <<64,72,245,195>>),
    ?line check(fun() -> <<3.14:32/float-little>> end,
                "<<3.14:32/float-little>>.",
                <<195,245,72,64>>),
    ?line case eval_string("<<3.14:32/float-native>>.") of
              <<64,72,245,195>> -> ok;
              <<195,245,72,64>> -> ok
          end,
    ?line error_check("<<(<<17,3:2>>)/binary>>.", badarg),
    ?line check(fun() -> <<(<<17,3:2>>)/bitstring>> end,
                "<<(<<17,3:2>>)/bitstring>>.",
                <<17,3:2>>),
    ?line check(fun() -> <<(<<17,3:2>>):10/bitstring>> end,
                "<<(<<17,3:2>>):10/bitstring>>.",
                <<17,3:2>>),
    ?line check(fun() -> <<<<344:17>>/binary-unit:17>> end,
		"<<<<344:17>>/binary-unit:17>>.",
		<<344:17>>),

    ?line check(fun() -> <<X:18/big>> = <<34:18/big>>, X end,
                "begin <<X:18/big>> = <<34:18/big>>, X end.",
                34),
    ?line check(fun() -> <<X:18/big-unit:2>> = <<34:18/big-unit:2>>, X end,
                "begin <<X:18/big-unit:2>> = <<34:18/big-unit:2>>, X end.",
                34),
    ?line check(fun() -> <<X:18/little>> = <<34:18/little>>, X end,
                "begin <<X:18/little>> = <<34:18/little>>, X end.",
                34),
    ?line check(fun() -> <<X:18/native>> = <<34:18/native>>, X end,
                "begin <<X:18/native>> = <<34:18/native>>, X end.",
                34),
    ?line check(fun() -> <<X:18/big-signed>> = <<34:18/big-signed>>, X end,
                "begin <<X:18/big-signed>> = <<34:18/big-signed>>, X end.",
                34),
    ?line check(fun() -> <<X:18/little-signed>> = <<34:18/little-signed>>, 
                         X end,
                "begin <<X:18/little-signed>> = <<34:18/little-signed>>, 
                       X end.",
                34),
    ?line check(fun() -> <<X:18/native-signed>> = <<34:18/native-signed>>, 
                         X end,
                "begin <<X:18/native-signed>> = <<34:18/native-signed>>, 
                       X end.",
                34),
    ?line check(fun() -> <<X:18/big-unsigned>> = <<34:18/big-unsigned>>, 
                         X end,
                "begin <<X:18/big-unsigned>> = <<34:18/big-unsigned>>, 
                       X end.",
                34),
    ?line check(fun() -> 
                        <<X:18/little-unsigned>> = <<34:18/little-unsigned>>, 
                        X end,
                "begin <<X:18/little-unsigned>> = <<34:18/little-unsigned>>, 
                       X end.",
                34),
    ?line check(fun() -> 
                        <<X:18/native-unsigned>> = <<34:18/native-unsigned>>, 
                        X end,
                "begin <<X:18/native-unsigned>> = <<34:18/native-unsigned>>, 
                       X end.",
                34),
    ?line check(fun() -> <<X:32/float-big>> = <<2.0:32/float-big>>, X end,
                "begin <<X:32/float-big>> = <<2.0:32/float-big>>, 
                        X end.",
                2.0),
    ?line check(fun() -> <<X:32/float-little>> = <<2.0:32/float-little>>, 
                         X end,
                "begin <<X:32/float-little>> = <<2.0:32/float-little>>, 
                        X end.",
                2.0),
    ?line check(fun() -> <<X:32/float-native>> = <<2.0:32/float-native>>, 
                         X end,
                "begin <<X:32/float-native>> = <<2.0:32/float-native>>, 
                        X end.",
                2.0),

    ?line check(
            fun() -> 
                    [X || <<"hej",X:8>> <= <<"hej",8,"san",9,"hej",17,"hej">>]
            end,
            "[X || <<\"hej\",X:8>> <= 
                        <<\"hej\",8,\"san\",9,\"hej\",17,\"hej\">>].",
            [8,17]),
    ?line check(
            fun() ->
                    L = 8, << <<B:32>> || <<L:L,B:L>> <= <<16:8, 7:16>> >>
            end,
            "begin L = 8, << <<B:32>> || <<L:L,B:L>> <= <<16:8, 7:16>> >> 
             end.",
            <<0,0,0,7>>),
    %% Test the Value part of a binary segment. 
    %% "Old" bugs have been fixed (partial_eval is called on Value).
    ?line check(fun() -> [ 3 || <<17/float>> <= <<17.0/float>>] end,
                "[ 3 || <<17/float>> <= <<17.0/float>>].",
                [3]),
    ?line check(fun() -> [ 3 || <<17/float>> <- [<<17.0/float>>]] end,
                "[ 3 || <<17/float>> <- [<<17.0/float>>]].",
                [3]),
    ?line check(fun() -> [ X || <<17/float,X:3>> <= <<17.0/float,2:3>>] end,
                "[ X || <<17/float,X:3>> <= <<17.0/float,2:3>>].",
                [2]),
    ?line check(fun() -> 
                 [ foo || <<(1 bsl 1023)/float>> <= <<(1 bsl 1023)/float>>]
                end,
                "[ foo || <<(1 bsl 1023)/float>> <= <<(1 bsl 1023)/float>>].",
                [foo]),
    ?line check(fun() -> 
                 [ foo || <<(1 bsl 1023)/float>> <- [<<(1 bsl 1023)/float>>]]
                end,
               "[ foo || <<(1 bsl 1023)/float>> <- [<<(1 bsl 1023)/float>>]].",
                [foo]),
    ?line error_check("[ foo || <<(1 bsl 1024)/float>> <- 
                            [<<(1 bsl 1024)/float>>]].",
                      badarg),
    ?line check(fun() -> 
                 [ foo || <<(1 bsl 1024)/float>> <- [<<(1 bsl 1023)/float>>]]
                end,
                "[ foo || <<(1 bsl 1024)/float>> <- 
                            [<<(1 bsl 1023)/float>>]].",
                []),
    ?line check(fun() -> 
                 [ foo || <<(1 bsl 1024)/float>> <= <<(1 bsl 1023)/float>>]
                end,
                "[ foo || <<(1 bsl 1024)/float>> <= 
                            <<(1 bsl 1023)/float>>].",
                []),
    ?line check(fun() ->
                        L = 8, 
                        [{L,B} || <<L:L,B:L/float>> <= <<32:8,7:32/float>>]
                end,
                "begin L = 8, 
                       [{L,B} || <<L:L,B:L/float>> <= <<32:8,7:32/float>>]
                 end.",
                [{32,7.0}]),
    ?line check(fun() ->
                        L = 8, 
                        [{L,B} || <<L:L,B:L/float>> <- [<<32:8,7:32/float>>]]
                end,
                "begin L = 8, 
                       [{L,B} || <<L:L,B:L/float>> <- [<<32:8,7:32/float>>]]
                 end.",
                [{32,7.0}]),
    ?line check(fun() ->
                        [foo || <<"s">> <= <<"st">>]
                end,
                "[foo || <<\"s\">> <= <<\"st\">>].",
                [foo]),
    ?line check(fun() -> <<_:32>> = <<17:32>> end,
                "<<_:32>> = <<17:32>>.",
                <<17:32>>),
    ?line check(fun() -> [foo || <<_:32>> <= <<17:32,20:32>>] end,
                "[foo || <<_:32>> <= <<17:32,20:32>>].",
                [foo,foo]),

    ?line check(fun() -> << <<X:32>> || X <- [1,2,3], X > 1 >> end,
                "<< <<X:32>> || X <- [1,2,3], X > 1 >>.",
                <<0,0,0,2,0,0,0,3>>),
    ?line error_check("[X || <<X>> <= [a,b]].",{bad_generator,[a,b]}),
    ok.

otp_6787(doc) ->
    ["OTP-6787. bitlevel binaries."];
otp_6787(suite) ->
    [];
otp_6787(Config) when is_list(Config) ->
    ?line check(
            fun() -> <<16:(1024*1024)>> = <<16:(1024*1024)>> end,
            "<<16:(1024*1024)>> = <<16:(1024*1024)>>.",
            <<16:1048576>>),
    ok.

otp_6977(doc) ->
    ["OTP-6977. ++ bug."];
otp_6977(suite) ->
    [];
otp_6977(Config) when is_list(Config) ->
    ?line check(
            fun() -> (fun([$X] ++ _) -> ok end)("X") end,
            "(fun([$X] ++ _) -> ok end)(\"X\").",
            ok),
    ok.

otp_7550(doc) ->
    ["OTP-7550. Support for UTF-8, UTF-16, UTF-32."];
otp_7550(Config) when is_list(Config) ->

    %% UTF-8.
    ?line check(
	    fun() -> <<65>> = <<65/utf8>> end,
	    "<<65>> = <<65/utf8>>.",
	    <<65>>),
    ?line check(
	    fun() -> <<350/utf8>> = <<197,158>> end,
	    "<<350/utf8>> = <<197,158>>.",
	    <<197,158>>),
    ?line check(
	    fun() -> <<$b,$j,$\303,$\266,$r,$n>> = <<"bj\366rn"/utf8>> end,
	    "<<$b,$j,$\303,$\266,$r,$n>> = <<\"bj\366rn\"/utf8>>.",
	    <<$b,$j,$\303,$\266,$r,$n>>),

    %% UTF-16.
    ?line check(
	    fun() -> <<0,65>> = <<65/utf16>> end,
	    "<<0,65>> = <<65/utf16>>.",
	    <<0,65>>),
    ?line check(
	    fun() -> <<16#D8,16#08,16#DF,16#45>> = <<16#12345/utf16>> end,
	    "<<16#D8,16#08,16#DF,16#45>> = <<16#12345/utf16>>.",
	    <<16#D8,16#08,16#DF,16#45>>),
    ?line check(
	    fun() -> <<16#08,16#D8,16#45,16#DF>> = <<16#12345/little-utf16>> end,
	    "<<16#08,16#D8,16#45,16#DF>> = <<16#12345/little-utf16>>.",
	    <<16#08,16#D8,16#45,16#DF>>),

    ?line check(
	    fun() -> <<350/utf16>> = <<1,94>> end,
	    "<<350/utf16>> = <<1,94>>.",
	    <<1,94>>),
    ?line check(
	    fun() -> <<350/little-utf16>> = <<94,1>> end,
	    "<<350/little-utf16>> = <<94,1>>.",
	    <<94,1>>),
    ?line check(
	    fun() -> <<16#12345/utf16>> = <<16#D8,16#08,16#DF,16#45>> end,
	    "<<16#12345/utf16>> = <<16#D8,16#08,16#DF,16#45>>.",
	    <<16#D8,16#08,16#DF,16#45>>),
    ?line check(
	    fun() -> <<16#12345/little-utf16>> = <<16#08,16#D8,16#45,16#DF>> end,
	    "<<16#12345/little-utf16>> = <<16#08,16#D8,16#45,16#DF>>.",
	    <<16#08,16#D8,16#45,16#DF>>),

    %% UTF-32.
    ?line check(
	    fun() -> <<16#12345/utf32>> = <<16#0,16#01,16#23,16#45>> end,
	    "<<16#12345/utf32>> = <<16#0,16#01,16#23,16#45>>.",
	    <<16#0,16#01,16#23,16#45>>),
    ?line check(
	    fun() -> <<16#0,16#01,16#23,16#45>> = <<16#12345/utf32>> end,
	    "<<16#0,16#01,16#23,16#45>> = <<16#12345/utf32>>.",
	    <<16#0,16#01,16#23,16#45>>),
    ?line check(
	    fun() -> <<16#12345/little-utf32>> = <<16#45,16#23,16#01,16#00>> end,
	    "<<16#12345/little-utf32>> = <<16#45,16#23,16#01,16#00>>.",
	    <<16#45,16#23,16#01,16#00>>),
    ?line check(
	    fun() -> <<16#12345/little-utf32>> end,
	    "<<16#12345/little-utf32>>.",
	    <<16#45,16#23,16#01,16#00>>),

    %% Mixed.
    ?line check(
	    fun() -> <<16#41,16#12345/utf32,16#0391:16,16#2E:8>> end,
	    "<<16#41,16#12345/utf32,16#0391:16,16#2E:8>>.",
	    <<16#41,16#00,16#01,16#23,16#45,16#03,16#91,16#2E>>),
    ok.


otp_8133(doc) ->
    ["OTP-8133. Bit comprehension bug."];
otp_8133(suite) ->
    [];
otp_8133(Config) when is_list(Config) ->
    ?line check(
            fun() ->
                  E = fun(N) -> 
                              if 
                                  is_integer(N) -> <<N/integer>>; 
                                  true -> throw(foo) 
                              end 
                      end,
                  try << << (E(V))/binary >> || V <- [1,2,3,a] >> 
                  catch foo -> ok
                  end
            end,
            "begin
                 E = fun(N) -> 
                            if is_integer(N) -> <<N/integer>>; 
                               true -> throw(foo) 
                            end 
                     end,
                 try << << (E(V))/binary >> || V <- [1,2,3,a] >> 
                 catch foo -> ok
                 end
             end.",
            ok),
    ?line check(
            fun() ->
                  E = fun(N) -> 
                              if 
                                  is_integer(N) -> <<N/integer>>; 

                                  true -> erlang:error(foo) 
                              end 
                      end,
                  try << << (E(V))/binary >> || V <- [1,2,3,a] >> 
                  catch error:foo -> ok
                  end
            end,
            "begin
                 E = fun(N) -> 
                            if is_integer(N) -> <<N/integer>>; 
                               true -> erlang:error(foo) 
                            end 
                     end,
                 try << << (E(V))/binary >> || V <- [1,2,3,a] >> 
                 catch error:foo -> ok
                 end
             end.",
            ok),
    ok.

otp_10622(doc) ->
    ["OTP-10622. Bugs."];
otp_10622(suite) ->
    [];
otp_10622(Config) when is_list(Config) ->
    check(fun() -> <<0>> = <<"\x{400}">> end,
          "<<0>> = <<\"\\x{400}\">>. ",
          <<0>>),
    check(fun() -> <<"\x{aa}ff"/utf8>> = <<"\x{aa}ff"/utf8>> end,
          "<<\"\\x{aa}ff\"/utf8>> = <<\"\\x{aa}ff\"/utf8>>. ",
          <<\xaaff">>),
    %% The same bug as last example:
    check(fun() -> case <<"foo"/utf8>> of
                       <<"foo"/utf8>> -> true
                   end
          end,
          "case <<\"foo\"/utf8>> of <<\"foo\"/utf8>> -> true end.",
          true),
    check(fun() -> <<"\x{400}"/utf8>> = <<"\x{400}"/utf8>> end,
          "<<\"\\x{400}\"/utf8>> = <<\"\\x{400}\"/utf8>>. ",
          <<208,128>>),
    error_check("<<\"\\x{aaa}\">> = <<\"\\x{aaa}\">>.",
                {badmatch,<<"\xaa">>}),

    check(fun() -> [a || <<"\x{aaa}">> <= <<2703:16>>] end,
          "[a || <<\"\\x{aaa}\">> <= <<2703:16>>]. ",
          []),
    check(fun() -> [a || <<"\x{aa}"/utf8>> <= <<"\x{aa}"/utf8>>] end,
          "[a || <<\"\\x{aa}\"/utf8>> <= <<\"\\x{aa}\"/utf8>>]. ",
          [a]),
    check(fun() -> [a || <<"\x{aa}x"/utf8>> <= <<"\x{aa}y"/utf8>>] end,
          "[a || <<\"\\x{aa}x\"/utf8>> <= <<\"\\x{aa}y\"/utf8>>]. ",
          []),
    check(fun() -> [a || <<"\x{aaa}">> <= <<"\x{aaa}">>] end,
          "[a || <<\"\\x{aaa}\">> <= <<\"\\x{aaa}\">>]. ",
          []),
    check(fun() -> [a || <<"\x{aaa}"/utf8>> <= <<"\x{aaa}"/utf8>>] end,
          "[a || <<\"\\x{aaa}\"/utf8>> <= <<\"\\x{aaa}\"/utf8>>]. ",
          [a]),

    ok.

funs(doc) ->
    ["Simple cases, just to cover some code."];
funs(suite) ->
    [];
funs(Config) when is_list(Config) ->
    do_funs(none, none),
    do_funs(lfh(), none),
    do_funs(lfh(), efh()),

    ?line error_check("nix:foo().", {access_not_allowed,nix}, lfh(), efh()),
    ?line error_check("bar().", undef, none, none),

    ?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
                         F1(F1, 1000) end,
                "begin F1 = fun(F,N) -> count_down(F, N) end,"
                "F1(F1,1000) end.",
		0, ['F1'], lfh(), none),

    ?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
                         F1(F1, 1000) end,
                "begin F1 = fun(F,N) -> count_down(F, N) end,"
                "F1(F1,1000) end.",
		0, ['F1'], lfh_value(), none),

    ?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
                         F1(F1, 1000) end,
                "begin F1 = fun(F,N) -> count_down(F, N) end,"
                "F1(F1,1000) end.",
		0, ['F1'], lfh_value_extra(), none),

    ?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
                         F1(F1, 1000) end,
                "begin F1 = fun(F,N) -> count_down(F, N) end,"
                "F1(F1,1000) end.",
		0, ['F1'], {?MODULE,local_func_value}, none),
    %% This is not documented, and only for backward compatibility (good!).
    B0 = erl_eval:new_bindings(),
    ?line check(fun() -> is_function(?MODULE:count_down_fun()) end,
                "begin is_function(count_down_fun()) end.",
                true, [], {?MODULE,local_func,[B0]},none),

    EF = fun({timer,sleep}, As) when length(As) == 1 -> exit({got_it,sleep});
            ({M,F}, As) -> apply(M, F, As)
         end,
    EFH = {value, EF},
    ?line error_check("apply(timer, sleep, [1]).", got_it, none, EFH),
    ?line error_check("begin F = fun(T) -> timer:sleep(T) end,F(1) end.",
                      got_it, none, EFH),
    ?line error_check("fun c/1.", undef),
    ?line error_check("fun a:b/0().", undef),

    MaxArgs = 20,
    ?line [true] = 
        lists:usort([run_many_args(SAs) || SAs <- many_args(MaxArgs)]),
    ?line {'EXIT',{{argument_limit,_},_}} = 
        (catch run_many_args(many_args1(MaxArgs+1))),

    ?line check(fun() -> M = lists, F = fun M:reverse/1,
			 [1,2] = F([2,1]), ok end,
		"begin M = lists, F = fun M:reverse/1,"
		" [1,2] = F([2,1]), ok end.",
		ok),

    %% Test that {M,F} is not accepted as a fun.
    error_check("{" ?MODULE_STRING ",module_info}().",
		{badfun,{?MODULE,module_info}}),
    ok.

run_many_args({S, As}) ->
    apply(eval_string(S), As) =:= As.

many_args(N) ->
    [many_args1(I) || I <- lists:seq(1, N)].

many_args1(N) ->
    F = fun(L, P) -> 
                tl(lists:flatten([","++P++integer_to_list(E) || E <- L]))
        end,
    L = lists:seq(1, N),
    T = F(L, "V"),
    S = lists:flatten(io_lib:format("fun(~s) -> [~s] end.", [T, T])),
    {S, L}.

do_funs(LFH, EFH) ->
    %% LFH is not really used by these examples...

    %% These tests do not prove that tail recursive functions really
    %% work (that the process does not grow); one should also run them
    %% manually with 1000 replaced by 1000000.

    M = atom_to_list(?MODULE),
    ?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
                         F1(F1, 1000) end,
                concat(["begin F1 = fun(F,N) -> ", M, 
                        ":count_down(F, N) end, F1(F1,1000) end."]),
		0, ['F1'], LFH, EFH),
    ?line check(fun() -> F1 = fun(F,N) -> apply(?MODULE,count_down,[F,N]) 
                              end, F1(F1, 1000) end,
                concat(["begin F1 = fun(F,N) -> apply(", M, 
                        ",count_down,[F, N]) end, F1(F1,1000) end."]),
		0, ['F1'], LFH, EFH),
    ?line check(fun() -> F = fun(F,N) when N > 0 -> apply(F,[F,N-1]); 
                                (_F,0) -> ok end, 
                         F(F, 1000)
                end,
                "begin F = fun(F,N) when N > 0 -> apply(F,[F,N-1]);"
                             "(_F,0) -> ok end,"
                       "F(F, 1000) end.",
                ok, ['F'], LFH, EFH),
    ?line check(fun() -> F = fun(F,N) when N > 0 -> 
                                     apply(erlang,apply,[F,[F,N-1]]);
                                (_F,0) -> ok end, 
                         F(F, 1000)
                end,
                "begin F = fun(F,N) when N > 0 ->"
                                   "apply(erlang,apply,[F,[F,N-1]]);"
                             "(_F,0) -> ok end,"
                       "F(F, 1000) end.",
                ok, ['F'], LFH, EFH),
    ?line check(fun() -> F = count_down_fun(), 
                         SF = fun(SF, F1, N) -> F(SF, F1, N) end,
                         SF(SF, F, 1000) end,
                concat(["begin F = ", M, ":count_down_fun(),"
                        "SF = fun(SF, F1, N) -> F(SF, F1, N) end,"
                        "SF(SF, F, 1000) end."]),
                ok, ['F','SF'], LFH, EFH),


    ?line check(fun() -> F = fun(X) -> A = 1+X, {X,A} end, 
                         true = {2,3} == F(2) end,
                "begin F = fun(X) -> A = 1+X, {X,A} end, 
                       true = {2,3} == F(2) end.", true, ['F'], LFH, EFH),
    check(fun() -> F = fun(X) -> erlang:'+'(X,2) end,
		   true = 3 == F(1) end,
	  "begin F = fun(X) -> erlang:'+'(X,2) end,"
	  "      true = 3 == F(1) end.", true, ['F'],
	  LFH, EFH),
    ?line check(fun() -> F = fun(X) -> byte_size(X) end,
                         ?MODULE:do_apply(F,<<"hej">>) end, 
                concat(["begin F = fun(X) -> size(X) end,",
                        M,":do_apply(F,<<\"hej\">>) end."]),
                3, ['F'], LFH, EFH),

    ?line check(fun() -> F1 = fun(X, Z) -> {X,Z} end,
                         Z = 5,
                         F2 = fun(X, Y) -> F1(Z,{X,Y}) end,
                         F3 = fun(X, Y) -> {a,F1(Z,{X,Y})} end,
                         {5,{x,y}} = F2(x,y), 
                         {a,{5,{y,x}}} = F3(y,x), 
                         {5,{5,y}} = F2(Z,y), 
                         true = {5,{x,5}} == F2(x,Z) end,
                "begin F1 = fun(X, Z) -> {X,Z} end,
                       Z = 5,
                       F2 = fun(X, Y) -> F1(Z,{X,Y}) end,
                       F3 = fun(X, Y) -> {a,F1(Z,{X,Y})} end,
                       {5,{x,y}} = F2(x,y), 
                       {a,{5,{y,x}}} = F3(y,x), 
                       {5,{5,y}} = F2(Z,y), 
                       true = {5,{x,5}} == F2(x,Z) end.",
                true, ['F1','Z','F2','F3'], LFH, EFH),
    ?line check(fun() -> F = fun(X) -> byte_size(X) end,
                         F2 = fun(Y) -> F(Y) end,
                         ?MODULE:do_apply(F2,<<"hej">>) end, 
                concat(["begin F = fun(X) -> size(X) end,",
                        "F2 = fun(Y) -> F(Y) end,",
                        M,":do_apply(F2,<<\"hej\">>) end."]),
                3, ['F','F2'], LFH, EFH),
    ?line check(fun() -> Z = 5, F = fun(X) -> {Z,X} end,
                         F2 = fun(Z) -> F(Z) end, F2(3) end,
                "begin Z = 5, F = fun(X) -> {Z,X} end,
                       F2 = fun(Z) -> F(Z) end, F2(3) end.",
                {5,3},['F','F2','Z'], LFH, EFH),
    ?line check(fun() -> F = fun(Z) -> Z end,
                         F2 = fun(X) -> F(X), Z = {X,X}, Z end,
                         {1,1} = F2(1), Z = 7, Z end,
                "begin F = fun(Z) -> Z end,
                       F2 = fun(X) -> F(X), Z = {X,X}, Z end,
                       {1,1} = F2(1), Z = 7, Z end.", 7, ['F','F2','Z'], 
                LFH, EFH),
    ?line check(fun() -> F = fun(F, N) -> [?MODULE:count_down(F,N) || X <-[1]]
                             end, F(F,2) end,
                concat(["begin F = fun(F, N) -> [", M, 
                       ":count_down(F,N) || X <-[1]] end, F(F,2) end."]),
                [[[0]]], ['F'], LFH, EFH),
    ok.

count_down(F, N) when N > 0 ->
    F(F, N-1);
count_down(_F, N) ->
    N.

count_down_fun() ->
    fun(SF,F,N) when N > 0 -> SF(SF,F,N-1);
       (_SF,_F,_N) -> ok
    end.

do_apply(F, V) ->
    F(V).

lfh() ->
    {eval, fun(F, As, Bs) -> local_func(F, As, Bs) end}.

local_func(F, As0, Bs0) when is_atom(F) ->
    {As,Bs} = erl_eval:expr_list(As0, Bs0, lfh()),
    case erlang:function_exported(?MODULE, F, length(As)) of
	true ->
	    {value,apply(?MODULE, F, As),Bs};
	false ->
	    {value,apply(shell_default, F, As),Bs}
    end.

lfh_value_extra() ->
    %% Not documented.
    {value, fun(F, As, a1, a2) -> local_func_value(F, As) end, [a1, a2]}.

lfh_value() ->
    {value, fun(F, As) -> local_func_value(F, As) end}.

local_func_value(F, As) when is_atom(F) ->
    case erlang:function_exported(?MODULE, F, length(As)) of
	true ->
	    apply(?MODULE, F, As);
	false ->
	    apply(shell_default, F, As)
    end.

efh() ->
    {value, fun(F, As) -> external_func(F, As) end}.

external_func({M,_}, _As) when M == nix ->
    exit({{access_not_allowed,M},[mfa]});
external_func(F, As) when is_function(F) ->
    apply(F, As);
external_func({M,F}, As) ->
    apply(M, F, As).



try_catch(doc) ->
    ["Test try-of-catch-after-end statement"];
try_catch(suite) -> 
    [];
try_catch(Config) when is_list(Config) ->
    %% Match in of with catch
    ?line check(fun() -> try 1 of 1 -> 2 catch _:_ -> 3 end end,
		"try 1 of 1 -> 2 catch _:_ -> 3 end.", 2),
    ?line check(fun() -> try 1 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end end,
		"try 1 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end.", 2),
    ?line check(fun() -> try 3 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end end,
		"try 3 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end.", 4),
    %% Just after
    ?line check(fun () -> X = try 1 after put(try_catch, 2) end,
			  {X,get(try_catch)} end,
		"begin X = try 1 after put(try_catch, 2) end, "
		"{X,get(try_catch)} end.", {1,2}),
    %% Match in of with after
    ?line check(fun() -> X = try 1 of 1 -> 2 after put(try_catch, 3) end,
			 {X,get(try_catch)} end,
		"begin X = try 1 of 1 -> 2 after put(try_catch, 3) end, "
		"{X,get(try_catch)} end.", {2,3}),
    ?line check(fun() -> X = try 1 of 1 -> 2; 3 -> 4 
			     after put(try_catch, 5) end,
			 {X,get(try_catch)} end,
		"begin X = try 1 of 1 -> 2; 3 -> 4 "
		"          after put(try_catch, 5) end, "
		"      {X,get(try_catch)} end.", {2,5}),
    ?line check(fun() -> X = try 3 of 1 -> 2; 3 -> 4 
			     after put(try_catch, 5) end,
			 {X,get(try_catch)} end,
		"begin X = try 3 of 1 -> 2; 3 -> 4 "
		"          after put(try_catch, 5) end, "
		"      {X,get(try_catch)} end.", {4,5}),
    %% Nomatch in of
    ?line error_check("try 1 of 2 -> 3 catch _:_ -> 4 end.",
		      {try_clause,1}),
    %% Nomatch in of with after
    ?line check(fun () -> {'EXIT',{{try_clause,1},_}} = 
			      begin catch try 1 of 2 -> 3
				          after put(try_catch, 4) end end,
			  get(try_catch) end,
		"begin {'EXIT',{{try_clause,1},_}} = "
		"          begin catch try 1 of 2 -> 3 "
		"                      after put(try_catch, 4) end end, "
		"      get(try_catch) end. ", 4),
    %% Exception in try
    ?line check(fun () -> try 1=2 catch error:{badmatch,2} -> 3 end end,
		"try 1=2 catch error:{badmatch,2} -> 3 end.", 3),
    ?line check(fun () -> try 1=2 of 3 -> 4 
			  catch error:{badmatch,2} -> 5 end end,
		"try 1=2 of 3 -> 4 "
		"catch error:{badmatch,2} -> 5 end.", 5),
    %% Exception in try with after
    ?line check(fun () -> X = try 1=2 
			      catch error:{badmatch,2} -> 3
			      after put(try_catch, 4) end,
			  {X,get(try_catch)} end,
		"begin X = try 1=2 "
		"          catch error:{badmatch,2} -> 3 "
		"          after put(try_catch, 4) end, "
		"      {X,get(try_catch)} end. ", {3,4}),
    ?line check(fun () -> X = try 1=2 of 3 -> 4
			      catch error:{badmatch,2} -> 5
			      after put(try_catch, 6) end,
			  {X,get(try_catch)} end,
		"begin X = try 1=2 of 3 -> 4"
		"          catch error:{badmatch,2} -> 5 "
		"          after put(try_catch, 6) end, "
		"      {X,get(try_catch)} end. ", {5,6}),
    %% Uncaught exception
    ?line error_check("try 1=2 catch error:undefined -> 3 end. ",
		      {badmatch,2}),
    ?line error_check("try 1=2 of 3 -> 4 catch error:undefined -> 5 end. ",
		      {badmatch,2}),
    %% Uncaught exception with after
    ?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
			      begin catch try 1=2 
					  after put(try_catch, 3) end end,
			  get(try_catch) end,
		"begin {'EXIT',{{badmatch,2},_}} = "
		"          begin catch try 1=2 "
		"                      after put(try_catch, 3) end end, "
		"      get(try_catch) end. ", 3),
    ?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
			      begin catch try 1=2 of 3 -> 4
					  after put(try_catch, 5) end end,
			  get(try_catch) end,
		"begin {'EXIT',{{badmatch,2},_}} = "
		"          begin catch try 1=2 of 3 -> 4"
		"                      after put(try_catch, 5) end end, "
		"      get(try_catch) end. ", 5),
    ?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
			      begin catch try 1=2 catch error:undefined -> 3
					  after put(try_catch, 4) end end,
			  get(try_catch) end,
		"begin {'EXIT',{{badmatch,2},_}} = "
		"          begin catch try 1=2 catch error:undefined -> 3 "
		"                      after put(try_catch, 4) end end, "
		"      get(try_catch) end. ", 4),
    ?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
			      begin catch try 1=2 of 3 -> 4
					  catch error:undefined -> 5
					  after put(try_catch, 6) end end,
			  get(try_catch) end,
		"begin {'EXIT',{{badmatch,2},_}} = "
		"          begin catch try 1=2 of 3 -> 4 "
		"                      catch error:undefined -> 5 "
		"                      after put(try_catch, 6) end end, "
		"      get(try_catch) end. ", 6),
    ok.


eval_expr_5(doc) ->
    ["(OTP-7933)"];
eval_expr_5(suite) ->
    [];
eval_expr_5(Config) when is_list(Config) ->
    ?line {ok,Tokens ,_} =
	erl_scan:string("if a+4 == 4 -> yes; true -> no end. "),
    ?line {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
    ?line {value, no, []} = erl_eval:expr(Expr, [], none, none, none),
    ?line no = erl_eval:expr(Expr, [], none, none, value),
    try
	erl_eval:expr(Expr, [], none, none, 4711),
	?line function_clause = should_never_reach_here
    catch
	error:function_clause ->
	    ok
    end.

zero_width(Config) when is_list(Config) ->
    ?line check(fun() ->
			{'EXIT',{badarg,_}} = (catch <<not_a_number:0>>),
			ok
		end, "begin {'EXIT',{badarg,_}} = (catch <<not_a_number:0>>), "
		"ok end.", ok),
    ok.

eep37(Config) when is_list(Config) ->
    check(fun () -> (fun _(X) -> X end)(42) end,
          "(fun _(X) -> X end)(42).",
          42),
    check(fun () -> (fun _Id(X) -> X end)(42) end,
          "(fun _Id(X) -> X end)(42).", 42),
    check(fun () -> is_function((fun Self() -> Self end)(), 0) end,
          "is_function((fun Self() -> Self end)(), 0).",
          true),
    check(fun () ->
                  F = fun Fact(N) when N > 0 ->
                              N * Fact(N - 1);
                          Fact(0) ->
                              1
                       end,
                  F(6)
          end,
          "(fun Fact(N) when N > 0 -> N * Fact(N - 1); Fact(0) -> 1 end)(6).",
          720),
    ok.

eep43(Config) when is_list(Config) ->
    check(fun () -> #{} end, " #{}.", #{}),
    check(fun () -> #{a => b} end, "#{a => b}.", #{a => b}),
    check(fun () ->
                  Map = #{a => b},
                  {Map#{a := b},Map#{a => c},Map#{d => e}}
          end,
          "begin "
          "    Map = #{a => B=b}, "
          "    {Map#{a := B},Map#{a => c},Map#{d => e}} "
          "end.",
          {#{a => b},#{a => c},#{a => b,d => e}}),
    check(fun () ->
                  lists:map(fun (X) -> X#{price := 0} end,
                            [#{hello => 0, price => nil}])
          end,
          "lists:map(fun (X) -> X#{price := 0} end,
                     [#{hello => 0, price => nil}]).",
          [#{hello => 0, price => 0}]),
    check(fun () ->
		Map = #{ <<33:333>> => "wat" },
		#{ <<33:333>> := "wat" } = Map
	  end,
	  "begin "
	  "   Map = #{ <<33:333>> => \"wat\" }, "
	  "   #{ <<33:333>> := \"wat\" } = Map  "
	  "end.",
	  #{ <<33:333>> => "wat" }),
    check(fun () ->
		K1 = 1,
		K2 = <<42:301>>,
		K3 = {3,K2},
		Map = #{ K1 => 1, K2 => 2, K3 => 3, {2,2} => 4},
		#{ K1 := 1, K2 := 2, K3 := 3, {2,2} := 4} = Map
	  end,
	  "begin "
	  "    K1 = 1, "
	  "    K2 = <<42:301>>, "
	  "    K3 = {3,K2}, "
	  "    Map = #{ K1 => 1, K2 => 2, K3 => 3, {2,2} => 4}, "
	  "    #{ K1 := 1, K2 := 2, K3 := 3, {2,2} := 4} = Map "
	  "end.",
	  #{ 1 => 1, <<42:301>> => 2, {3,<<42:301>>} => 3, {2,2} => 4}),
    error_check("[camembert]#{}.", {badmap,[camembert]}),
    error_check("[camembert]#{nonexisting:=v}.", {badmap,[camembert]}),
    error_check("#{} = 1.", {badmatch,1}),
    error_check("[]#{a=>error(bad)}.", bad),
    error_check("(#{})#{nonexisting:=value}.", {badkey,nonexisting}),
    ok.

%% Check the string in different contexts: as is; in fun; from compiled code.
check(F, String, Result) ->
    check1(F, String, Result),
    FunString = concat(["fun() -> ", no_final_dot(String), " end(). "]),
    check1(F, FunString, Result),
    CompileString = concat(["hd(lists:map(fun(_) -> ", no_final_dot(String), 
                            " end, [foo])). "]),
    check1(F, CompileString, Result).

check1(F, String, Result) ->
    Result = F(),
    case catch parse_and_run(String) of
        {value, Result, _} ->
            ok;
        Other ->
            test_server:fail({eval, Other, Result})
    end.

check(F, String, Result, BoundVars, LFH, EFH) ->
    Result = F(),
    case catch parse_and_run(String, LFH, EFH) of
        {value, Result, Bs} ->
            %% We just assume that Bs is an orddict...
            Keys = orddict:fetch_keys(Bs),
            case sort(BoundVars) == Keys of
                true -> 
                    ok;
                false -> 
                    test_server:fail({check, BoundVars, Keys})
            end,
            ok;
        Other ->
            test_server:fail({check, Other, Result})
    end.

error_check(String, Result) ->
    case catch parse_and_run(String) of
        {'EXIT', {Result,_}} ->
            ok;
        Other ->
            test_server:fail({eval, Other, Result})
    end.

error_check(String, Result, LFH, EFH) ->
    case catch parse_and_run(String, LFH, EFH) of
        {'EXIT', {Result,_}} ->
            ok;
        Other ->
            test_server:fail({eval, Other, Result})
    end.

eval_string(String) ->
    {value, Result, _} = parse_and_run(String),
    Result.

parse_and_run(String) ->
    {ok,Tokens,_} = erl_scan:string(String),
    {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
    erl_eval:expr(Expr, []).

parse_and_run(String, LFH, EFH) ->
    {ok,Tokens,_} = erl_scan:string(String),
    {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
    erl_eval:expr(Expr, [], LFH, EFH).

no_final_dot(S) ->
    case lists:reverse(S) of
        " ." ++ R -> lists:reverse(R);
        "." ++ R -> lists:reverse(R);
        _ -> S
    end.