aboutsummaryrefslogblamecommitdiffstats
path: root/lib/debugger/test/guard_SUITE.erl
blob: 2b87ef23ba96d457563ef5b907498bd011467f88 (plain) (tree)
1
2
3
4
5
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
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
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479


                   
                                                        
  










                                                                           






                     


                                                                  











                                                                 

                                                                     
 
                                           



                           
                                         
 
         
            
 



                                     
           

                                    
           


           






                                                            

                                                            





                                                    
                                  



                                    
                                              

                                                          
           
 
                                             


















































































































































































































                                                                                     
                                                                         





































































                                                                              

                                                                    


















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































                                                                                                                                                  


























































































































                                                                               

 












































































                                                              










                                                       

                                       
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1999-2011. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%%     http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%

%%
-module(guard_SUITE).

-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
	 init_per_testcase/2,end_per_testcase/2,
	 init_per_suite/1,end_per_suite/1,
	 bad_arith/1,bad_tuple/1,test_heap_guards/1,guard_bifs/1,
	 type_tests/1,const_guard/1,
	 const_cond/1,basic_not/1,complex_not/1,
	 semicolon/1,complex_semicolon/1,comma/1,
	 or_guard/1,more_or_guards/1,
	 complex_or_guards/1,and_guard/1,
	 xor_guard/1,more_xor_guards/1,
	 old_guard_tests/1,
	 build_in_guard/1,gbif/1,
	 t_is_boolean/1,is_function_2/1,
	 tricky/1,rel_ops/1,
	 basic_andalso_orelse/1,traverse_dcd/1,
	 check_qlc_hrl/1,andalso_semi/1,t_tuple_size/1,binary_part/1,
	 bad_constants/1]).

-include_lib("common_test/include/ct.hrl").

-export([init/4]).
-import(lists, [member/2]).

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

all() -> 
    cases().

groups() -> 
    [].

init_per_group(_GroupName, Config) ->
    Config.

end_per_group(_GroupName, Config) ->
    Config.


cases() -> 
    [bad_arith, bad_tuple, test_heap_guards, guard_bifs,
     type_tests, const_guard, const_cond, basic_not,
     complex_not, semicolon, complex_semicolon, comma,
     or_guard, more_or_guards, complex_or_guards, and_guard,
     xor_guard, more_xor_guards, build_in_guard,
     old_guard_tests, gbif, t_is_boolean, is_function_2,
     tricky, rel_ops, basic_andalso_orelse, traverse_dcd,
     check_qlc_hrl, andalso_semi, t_tuple_size, binary_part,
     bad_constants].

init_per_testcase(_Case, Config) ->
    test_lib:interpret(?MODULE),
    ?line Dog = test_server:timetrap(?t:minutes(1)),
    [{watchdog,Dog}|Config].

end_per_testcase(_Case, Config) ->
    Dog = ?config(watchdog, Config),
    ?t:timetrap_cancel(Dog),
    ok.

init_per_suite(Config) when is_list(Config) ->
    ?line test_lib:interpret(?MODULE),
    ?line true = lists:member(?MODULE, int:interpreted()),
    Config.

end_per_suite(Config) when is_list(Config) ->
    ok.

bad_arith(doc) -> "Test that a bad arithmetic operation in a guard works correctly.";
bad_arith(suite) -> [];
bad_arith(Config) when list(Config) ->
    ?line 5 = bad_arith1(2, 3),
    ?line 10 = bad_arith1(1, infinity),
    ?line 10 = bad_arith1(infinity, 1),
    ?line 42 = bad_div(24, 0),
    ok.

bad_arith1(T1, T2) when T1+T2 < 10 ->
    T1+T2;
bad_arith1(_, _) ->
    10.

bad_div(A, B) when A/B > 0 ->
    A/B;
bad_div(A, B) when A div B > 0 ->
    A div B;
bad_div(_A, _B) ->
    42.

bad_tuple(doc) -> "Test that bad arguments to element/2 are handled correctly.";
bad_tuple(suite) -> [];
bad_tuple(Config) when list(Config) ->
    ?line error = bad_tuple1(a),
    ?line error = bad_tuple1({a, b}),
    ?line x = bad_tuple1({x, b}),
    ?line y = bad_tuple1({a, b, y}),
    ok.

bad_tuple1(T) when element(1, T) == x -> x;
bad_tuple1(T) when element(3, T) == y -> y;
bad_tuple1(_) -> error.

test_heap_guards(doc) -> "";
test_heap_guards(suite) -> [];
test_heap_guards(Config) when list(Config) ->
    ?line process_flag(trap_exit, true),
    ?line Tuple = {a, tuple, is, built, here, xxx},
    ?line List = [a, list, is, built, here],

    ?line try_fun(fun a_case/1, [Tuple], [Tuple]),
    ?line try_fun(fun a_case/1, [List], [List, List]),
    ?line try_fun(fun a_case/1, [a], [a]),

    ?line try_fun(fun an_if/1, [Tuple], [Tuple]),
    ?line try_fun(fun an_if/1, [List], [List, List]),
    ?line try_fun(fun an_if/1, [a], [a]),

    ?line try_fun(fun receive_test/1, [Tuple], [Tuple]),
    ?line try_fun(fun receive_test/1, [List], [List, List]),
    ?line try_fun(fun receive_test/1, [a], [a]),
    ok.

a_case(V) ->
    case V of
	T when T == {a, tuple, is, built, here, xxx} ->
	    [T];
	L when L == [a, list, is, built, here] ->
	    [L, L];
	a ->
	    [a]
    end.

an_if(V) ->
    if
	V == {a, tuple, is, built, here, xxx} ->
	    [V];
	V == [a, list, is, built, here] ->
	    [V, V];
	V == a ->
	    [a]
    end.

receive_test(V) ->
    self() ! V,
    a_receive().

a_receive() ->
    receive
	T when T == {a, tuple, is, built, here, xxx} ->
	    [T];
	L when L == [a, list, is, built, here] ->
	    [L, L];
	a ->
	    [a]
    end.

try_fun(Fun, Args, Result) ->
    try_fun(16, Fun, Args, Result, []).

try_fun(0, _, _, _, _) ->
    ok;
try_fun(Iter, Fun, Args, Result, Filler) ->
    Pid = spawn_link(?MODULE, init, [self(),Fun,Args,list_to_tuple(Filler)]),
    receive
	{'EXIT',Pid,{result,Result}} ->
	    ?line try_fun(Iter-1, Fun, Args, Result, [0|Filler]);
	{'EXIT',Pid,{result,Other}} ->
	    ?line io:format("Expected ~p; got ~p~n", [Result,Other]),
	    ?line test_server:fail();
	Other ->
	    ?line test_server:fail({unexpected_message,Other})
    end.

init(_ReplyTo, Fun, Args, Filler) ->
    Result = {result, apply(Fun, Args)},
    dummy(Filler),
    io:format("~p: result = ~p\n", [?LINE,Result]),
    exit(Result).

dummy(_) ->
    ok.

guard_bifs(doc) -> "Test all guard bifs with nasty (but legal arguments).";
guard_bifs(suite) -> [];
guard_bifs(Config) when list(Config) ->
    ?line Big = -237849247829874297658726487367328971246284736473821617265433,
    ?line Float = 387924.874,

    %% Succeding use of guard bifs.

    ?line try_gbif('abs/1', Big, -Big),
    ?line try_gbif('float/1', Big, float(Big)),
    ?line try_gbif('trunc/1', Float, 387924.0),
    ?line try_gbif('round/1', Float, 387925.0),
    ?line try_gbif('length/1', [], 0),

    ?line try_gbif('length/1', [a], 1),
    ?line try_gbif('length/1', [a, b], 2),
    ?line try_gbif('length/1', lists:seq(0, 31), 32),

    ?line try_gbif('hd/1', [a], a),
    ?line try_gbif('hd/1', [a, b], a),

    ?line try_gbif('tl/1', [a], []),
    ?line try_gbif('tl/1', [a, b], [b]),
    ?line try_gbif('tl/1', [a, b, c], [b, c]),

    ?line try_gbif('size/1', {}, 0),
    ?line try_gbif('size/1', {a}, 1),
    ?line try_gbif('size/1', {a, b}, 2),
    ?line try_gbif('size/1', {a, b, c}, 3),
    ?line try_gbif('size/1', list_to_binary([]), 0),
    ?line try_gbif('size/1', list_to_binary([1]), 1),
    ?line try_gbif('size/1', list_to_binary([1, 2]), 2),
    ?line try_gbif('size/1', list_to_binary([1, 2, 3]), 3),

    ?line try_gbif('element/2', {x}, {1, x}),
    ?line try_gbif('element/2', {x, y}, {1, x}),
    ?line try_gbif('element/2', {x, y}, {2, y}),

    ?line try_gbif('self/0', 0, self()),
    ?line try_gbif('node/0', 0, node()),
    ?line try_gbif('node/1', self(), node()),

    %% Failing use of guard bifs.

    ?line try_fail_gbif('abs/1', Big, 1),
    ?line try_fail_gbif('abs/1', [], 1),

    ?line try_fail_gbif('float/1', Big, 42),
    ?line try_fail_gbif('float/1', [], 42),

    ?line try_fail_gbif('trunc/1', Float, 0.0),
    ?line try_fail_gbif('trunc/1', [], 0.0),

    ?line try_fail_gbif('round/1', Float, 1.0),
    ?line try_fail_gbif('round/1', [], a),

    ?line try_fail_gbif('length/1', [], 1),
    ?line try_fail_gbif('length/1', [a], 0),
    ?line try_fail_gbif('length/1', a, 0),
    ?line try_fail_gbif('length/1', {a}, 0),

    ?line try_fail_gbif('hd/1', [], 0),
    ?line try_fail_gbif('hd/1', [a], x),
    ?line try_fail_gbif('hd/1', x, x),

    ?line try_fail_gbif('tl/1', [], 0),
    ?line try_fail_gbif('tl/1', [a], x),
    ?line try_fail_gbif('tl/1', x, x),

    ?line try_fail_gbif('size/1', {}, 1),
    ?line try_fail_gbif('size/1', [], 0),
    ?line try_fail_gbif('size/1', [a], 1),

    ?line try_fail_gbif('element/2', {}, {1, x}),
    ?line try_fail_gbif('element/2', {x}, {1, y}),
    ?line try_fail_gbif('element/2', [], {1, z}),

    ?line try_fail_gbif('self/0', 0, list_to_pid("<0.0.0>")),
    ?line try_fail_gbif('node/0', 0, xxxx),
    ?line try_fail_gbif('node/1', self(), xxx),
    ?line try_fail_gbif('node/1', yyy, xxx),
    ok.

try_gbif(Id, X, Y) ->
    case guard_bif(Id, X, Y) of
	{Id, X, Y} ->
	    io:format("guard_bif(~p, ~p, ~p) -- ok", [Id, X, Y]);
	Other ->
	    ?line ok = io:format("guard_bif(~p, ~p, ~p) -- bad result: ~p\n",
				 [Id, X, Y, Other]),
	    ?line test_server:fail()
    end.

try_fail_gbif(Id, X, Y) ->
    case catch guard_bif(Id, X, Y) of
	{'EXIT', {function_clause,[{?MODULE,guard_bif,[Id,X,Y],_}|_]}} ->
	    io:format("guard_bif(~p, ~p, ~p) -- ok", [Id,X,Y]);
	Other ->
	    ?line ok = io:format("guard_bif(~p, ~p, ~p) -- bad result: ~p\n",
				 [Id, X, Y, Other]),
	    ?line test_server:fail()
    end.

guard_bif('abs/1', X, Y) when abs(X) == Y ->
    {'abs/1', X, Y};
guard_bif('float/1', X, Y) when float(X) == Y ->
    {'float/1', X, Y};
guard_bif('trunc/1', X, Y) when trunc(X) == Y ->
    {'trunc/1', X, Y};
guard_bif('round/1', X, Y) when round(X) == Y ->
    {'round/1', X, Y};
guard_bif('length/1', X, Y) when length(X) == Y ->
    {'length/1', X, Y};
guard_bif('hd/1', X, Y) when hd(X) == Y ->
    {'hd/1', X, Y};
guard_bif('tl/1', X, Y) when tl(X) == Y ->
    {'tl/1', X, Y};
guard_bif('size/1', X, Y) when size(X) == Y ->
    {'size/1', X, Y};
guard_bif('element/2', X, {Pos, Expected}) when element(Pos, X) == Expected ->
    {'element/2', X, {Pos, Expected}};
guard_bif('self/0', X, Y) when self() == Y ->
    {'self/0', X, Y};
guard_bif('node/0', X, Y) when node() == Y ->
    {'node/0', X, Y};
guard_bif('node/1', X, Y) when node(X) == Y ->
    {'node/1', X, Y}.

type_tests(doc) -> "Test the type tests.";
type_tests(suite) -> [];
type_tests(Config) when list(Config) ->
    ?line Types = all_types(),
    ?line Tests = type_test_desc(),
    ?line put(errors, 0),
    ?line put(violations, 0),
    ?line type_tests(Tests, Types),
    ?line case {get(errors), get(violations)} of
	      {0, 0} ->
		  ok;
	      {0, N} ->
		  {comment, integer_to_list(N) ++ " standard violation(s)"};
	      {Errors, Violations} ->
		  io:format("~p sub test(s) failed, ~p violation(s)",
			    [Errors, Violations]),
		  ?line test_server:fail()
	  end.

type_tests([{Test, AllowedTypes}| T], AllTypes) ->
    type_tests(Test, AllTypes, AllowedTypes),
    type_tests(T, AllTypes);
type_tests([], _) ->
    ok.

type_tests(Test, [Type|T], Allowed) ->
    {TypeTag, Value} = Type,
    case member(TypeTag, Allowed) of
	true ->
	    case catch type_test(Test, Value) of
		Test ->
		    ok;
		_Other ->
		    io:format("Test ~p(~p) failed", [Test, Value]),
		    put(errors, get(errors) + 1)
	    end;
	false ->
	    case catch type_test(Test, Value) of
		{'EXIT',{function_clause,
			 [{?MODULE,type_test,[Test,Value],_}|_]}} ->
		    ok;
		{'EXIT',Other} ->
		    ?line test_server:fail({unexpected_error_reason,Other});
		tuple when function(Value) ->
		    io:format("Standard violation: Test ~p(~p) should fail",
			      [Test, Value]),
		    put(violations, get(violations) + 1);
		_Other ->
		    io:format("Test ~p(~p) succeeded (should fail)", [Test, Value]),
		    put(errors, get(errors) + 1)
	    end
    end,
    type_tests(Test, T, Allowed);
type_tests(_, [], _) ->
    ok.

all_types() ->
    [{small, 42},
     {big, 392742928742947293873938792874019287447829874290742},
     {float, 3.14156},
     {nil, []},
     {cons, [a]},
     {tuple, {a, b}},
     {atom, xxxx},
     {ref, make_ref()},
     {pid, self()},
     {port, open_port({spawn, efile}, [])},
     {function, fun(X) -> X+1, "" end},
     {binary, list_to_binary([])}].

type_test_desc() ->
    [{integer, [small, big]},
     {float, [float]},
     {number, [small, big, float]},
     {atom, [atom]},
     {list, [cons, nil]},
     {nonempty_list, [cons]},
     {nil, [nil]},
     {tuple, [tuple]},
     {pid, [pid]},
     {port, [port]},
     {reference, [ref]},
     {function, [function]}].

type_test(integer, X) when integer(X) ->
    integer;
type_test(float, X) when float(X) ->
    float;
type_test(number, X) when number(X) ->
    number;
type_test(atom, X) when atom(X) ->
    atom;
type_test(list, X) when list(X) ->
    list;
type_test(nonempty_list, [_]) ->
    nonempty_list;
type_test(nil, []) ->
    nil;
type_test(tuple, X) when tuple(X) ->
    tuple;
type_test(pid, X) when pid(X) ->
    pid;
type_test(reference, X) when reference(X) ->
    reference;
type_test(port, X) when port(X) ->
    port;
type_test(binary, X) when binary(X) ->
    binary;
type_test(function, X) when function(X) ->
    function.

const_guard(Config) when is_list(Config) ->
    ?line if
	      (0 == 0) and ((0 == 0) or (0 == 0)) ->
		  ok
	  end.


const_cond(Config) when is_list(Config) ->
    ?line ok = const_cond({}, 0),
    ?line ok = const_cond({a}, 1),
    ?line error = const_cond({a,b}, 3),
    ?line error = const_cond({a}, 0),
    ?line error = const_cond({a,b}, 1),
    ok.

const_cond(T, Sz) ->
    case T of
	_X when false -> never;
	_X when tuple(T), eq == eq, size(T) == Sz -> ok;
	_X when tuple(T), eq == leq, size(T) =< Sz -> ok;
	_X -> error
    end.

basic_not(Config) when is_list(Config) ->
    True = id(true),
    False = id(false),
    Glurf = id(glurf),
    A = id(5),
    B = id(37.5),
    C = id(-1),
    D = id(5),
    ATuple = {False,True,Glurf},

    ?line check(fun() -> if not false -> ok; true -> error end end, ok),
    ?line check(fun() -> if not true -> ok; true -> error end end, error),
    ?line check(fun() -> if not False -> ok; true -> error end end, ok),
    ?line check(fun() -> if not True -> ok; true -> error end end, error),

    ?line check(fun() -> if A > B -> gt; A < B -> lt; A == B -> eq end end, lt),
    ?line check(fun() -> if A > C -> gt; A < C -> lt; A == C -> eq end end, gt),
    ?line check(fun() -> if A > D -> gt; A < D -> lt; A == D -> eq end end, eq),

    ?line check(fun() -> if not (7 > 453) -> le; not (7 < 453) -> ge;
			    not (7 == 453) -> ne; true -> eq end end, le),
    ?line check(fun() -> if not (7 > -8) -> le; not (7 < -8) -> ge;
			    not (7 == -8) -> ne; true -> eq end end, ge),
    ?line check(fun() -> if not (7 > 7) -> le; not (7 < 7) -> ge;
			    not (7 == 7) -> ne; true -> eq end end, le),

    ?line check(fun() -> if not (A > B) -> le; not (A < B) -> ge;
			    not (A == B) -> ne; true -> eq end end, le),
    ?line check(fun() -> if not (A > C) -> le; not (A < C) -> ge;
			    not (A == C) -> ne; true -> eq end end, ge),
    ?line check(fun() -> if not (A > D) -> le; not (A < D) -> ge;
			    not (A == D) -> ne; true -> eq end end, le),

    ?line check(fun() -> if not element(1, ATuple) -> ok; true -> error end end, ok),
    ?line check(fun() -> if not element(2, ATuple) -> ok; true -> error end end, error),
    ?line check(fun() -> if not element(3, ATuple) -> ok; true -> error end end, error),

    ?line check(fun() -> if not glurf -> ok; true -> error end end, error),
    ?line check(fun() -> if not Glurf -> ok; true -> error end end, error),

    ok.

complex_not(Config) when is_list(Config) ->
    ATuple = id({false,true,gurka}),
    ?line check(fun() -> if not(element(1, ATuple)) -> ok; true -> error end end, ok),
    ?line check(fun() -> if not(element(2, ATuple)) -> ok; true -> error end end, error),

    ?line check(fun() -> if not(element(3, ATuple) == gurka) -> ok;
			    true -> error end end, error),
    ?line check(fun() -> if not(element(3, ATuple) =/= gurka) -> ok;
			    true -> error end end, ok),

    ?line check(fun() -> if {a,not(element(2, ATuple))} == {a,false} -> ok;
			    true -> error end end, ok),
    ?line check(fun() -> if {a,not(element(1, ATuple))} == {a,false} -> ok;
			    true -> error end end, error),

    ?line check(fun() -> if not(element(1, ATuple) or element(3, ATuple)) -> ok;
			    true -> error end end, error),

    %% orelse
    ?line check(fun() -> if not(element(1, ATuple) orelse element(3, ATuple)) -> ok;
			    true -> error end end, error),

    ok.

semicolon(Config) when is_list(Config) ->

    %% True/false combined using ';' (literal atoms).

    ?line check(fun() -> if true; false -> ok end end, ok),
    ?line check(fun() -> if false; true -> ok end end, ok),
    ?line check(fun() -> if true; true -> ok end end, ok),
    ?line check(fun() -> if false; false -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} = (catch if false; false -> ok end),
			exit
		end, exit),

    %% True/false combined used ';'.

    True = id(true),
    False = id(false),

    ?line check(fun() -> if True; False -> ok end end, ok),
    ?line check(fun() -> if False; True -> ok end end, ok),
    ?line check(fun() -> if True; True -> ok end end, ok),
    ?line check(fun() -> if False; False -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} = (catch if False; False -> ok end),
			exit
		end, exit),

    %% Combine true/false with a non-boolean value.
    Glurf = id(glurf),


    ?line check(fun() -> if True; Glurf -> ok end end, ok),
    ?line check(fun() -> if Glurf; True -> ok end end, ok),
    ?line check(fun() -> if Glurf; Glurf -> ok; true -> error end end, error),
    ?line check(fun() -> if False; Glurf -> ok; true -> error end end, error),
    ?line check(fun() -> if Glurf; False -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} = (catch if Glurf; Glurf -> ok end),
			exit
		end, exit),

    %% Combine true/false with errors.

    ATuple = id({false,true,gurka}),

    ?line check(fun() -> if True; element(42, ATuple) -> ok end end, ok),
    ?line check(fun() -> if element(42, ATuple); True -> ok end end, ok),
    ?line check(fun() -> if element(42, ATuple); element(42, ATuple) -> ok;
			    true -> error end end, error),
    ?line check(fun() -> if False; element(42, ATuple) -> ok;
			    true -> error end end, error),
    ?line check(fun() -> if element(42, ATuple);
			    False -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} =
			    (catch if element(42, ATuple);
				      element(42, ATuple) -> ok end),
			exit
		end, exit),

    ok.

complex_semicolon(Config) when is_list(Config) ->
    ?line ok = csemi1(int, {blurf}),
    ?line ok = csemi1(string, {blurf}),
    ?line ok = csemi1(float, [a]),
    ?line error = csemi1(35, 42),

    %% 2
    ?line ok = csemi2({}, {a,b,c}),
    ?line ok = csemi2({1,3.5}, {a,b,c}),
    ?line ok = csemi2(dum, {a,b,c}),

    ?line ok = csemi2({45,-19.3}, {}),
    ?line ok = csemi2({45,-19.3}, {dum}),
    ?line ok = csemi2({45,-19.3}, {dum,dum}),

    ?line error = csemi2({45}, {dum}),
    ?line error = csemi2([], {dum}),
    ?line error = csemi2({dum}, []),
    ?line error = csemi2([], []),

    %% 3
    ?line csemi3(fun csemi3a/4),
    ?line csemi3(fun csemi3b/4),
    ?line csemi3(fun csemi3c/4),

    %% 4
    ?line csemi4(fun csemi4a/4),
    ?line csemi4(fun csemi4b/4),
    ?line csemi4(fun csemi4c/4),
    ?line csemi4(fun csemi4d/4),

    %% 4, 'orelse' instead of 'or'
    ?line csemi4_orelse(fun csemi4_orelse_a/4),
    ?line csemi4_orelse(fun csemi4_orelse_b/4),
    ?line csemi4_orelse(fun csemi4_orelse_c/4),
    ?line csemi4_orelse(fun csemi4_orelse_d/4),

    ok.

csemi1(Type, Val) when is_list(Val), Type == float;
		       Type == int; Type == string -> ok;
csemi1(_, _) -> error.

csemi2(A, B) when size(A) > 1; size(B) > 2 -> ok;
csemi2(_, _) -> error.

csemi3(Csemi3) ->
    ok = Csemi3({}, {a,b,c}, [0], [0]),
    ok = Csemi3({1,3.5}, {a,b,c}, -1, -1),
    ok = Csemi3(dum, {a,b,c}, 0.0, 0.0),
    ok = Csemi3(dum, {c}, b, a),
    ok = Csemi3(dum, <<1,2,3>>, 0.0, 0.0),
    ok = Csemi3(<<3.5/float>>, {a,b,c}, -1, -1),

    ok = Csemi3({45,-19.3}, {}, [], []),
    ok = Csemi3({45,-19.3}, {dum}, 42, 42),
    ok = Csemi3({45,-19.3}, {dum,dum}, 33, 33),

    ok = Csemi3({45}, {dum}, 1.0, 0),
    ok = Csemi3([a], {dum}, 1.0, 0),
    ok = Csemi3({dum}, [], 1.0, 0),
    ok = Csemi3([], [], 1.0, 0),
    ok = Csemi3(blurf, {dum}, 1.0, 0),
    ok = Csemi3({a}, blurf, 1.0, 0),
    ok = Csemi3([a], [dum], 1.0, 0),
    ok = Csemi3({dum}, [], 1.0, 0),
    ok = Csemi3([], [], 1.0, 0),

    error = Csemi3({45}, {dum}, 0, 0),
    error = Csemi3([a], {dum}, 0, 0),
    error = Csemi3({dum}, [], 0, 0),
    error = Csemi3([], [], 0, 0),
    ok.

csemi3a(A, B, X, Y) when X > Y; size(A) > 1; size(B) > 2 -> ok;
csemi3a(_, _, _, _) -> error.

csemi3b(A, B, X, Y) when size(A) > 1; X > Y; size(B) > 2 -> ok;
csemi3b(_, _, _, _) -> error.

csemi3c(A, B, X, Y) when size(A) > 1; size(B) > 2; X > Y -> ok;
csemi3c(_, _, _, _) -> error.


csemi4(Test) ->
    ok = Test({a,b}, 2, {c,d}, 2),
    ok = Test({1,2,3}, 0, [], 0),
    ok = Test({}, 2, blurf, 0),
    ok = Test({}, 2, {1}, 2),

    error = Test([], 4, {}, 0),
    error = Test({}, 0, [a,b], 4),
    error = Test({}, 0, [a,b], 0),
    error = Test([], 0, {}, 0),
    error = Test({}, 0, {}, 0),

    ok.

csemi4a(A, X, B, Y) when (size(A) > 1) or (X > 1);
			 (size(B) > 1) or (Y > 1) -> ok;
csemi4a(_, _, _, _) -> error.

csemi4b(A, X, B, Y) when (X > 1) or (size(A) > 1);
			 (size(B) > 1) or (Y > 1) -> ok;
csemi4b(_, _, _, _) -> error.

csemi4c(A, X, B, Y) when (size(A) > 1) or (X > 1);
			 (Y > 1) or (size(B) > 1) -> ok;
csemi4c(_, _, _, _) -> error.

csemi4d(A, X, B, Y) when (X > 1) or (size(A) > 1);
			 (Y > 1) or (size(B) > 1) -> ok;
csemi4d(_, _, _, _) -> error.


csemi4_orelse(Test) ->
    ok = Test({a,b}, 2, {c,d}, 2),
    ok = Test({1,2,3}, 0, [], 0),
    ok = Test({}, 2, blurf, 0),
    ok = Test({}, 2, {1}, 2),

    ?line error = Test([], 1, {}, 0),

    ok.

csemi4_orelse_a(A, X, B, Y) when (size(A) > 1) orelse (X > 1);
			 (size(B) > 1) orelse (Y > 1) -> ok;
csemi4_orelse_a(_, _, _, _) -> error.

csemi4_orelse_b(A, X, B, Y) when (X > 1) orelse (size(A) > 1);
			 (size(B) > 1) orelse (Y > 1) -> ok;
csemi4_orelse_b(_, _, _, _) -> error.

csemi4_orelse_c(A, X, B, Y) when (size(A) > 1) orelse (X > 1);
                           (Y > 1) orelse (size(B) > 1) -> ok;
csemi4_orelse_c(_, _, _, _) -> error.

csemi4_orelse_d(A, X, B, Y) when (X > 1) or (size(A) > 1);
			 (Y > 1) or (size(B) > 1) -> ok;
csemi4_orelse_d(_, _, _, _) -> error.


comma(Config) when is_list(Config) ->

    %% ',' combinations of literal true/false.

    ?line check(fun() -> if true, false -> ok; true -> error end end, error),
    ?line check(fun() -> if false, true -> ok; true -> error end end, error),
    ?line check(fun() -> if true, true -> ok end end, ok),
    ?line check(fun() -> if false, false -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} =
			    (catch if true, false -> ok;
				      false, true -> ok;
				      false, false -> ok
				   end),
			exit
		end, exit),

    %% ',' combinations of true/false in variables.

    True = id(true),
    False = id(false),

    ?line check(fun() -> if True, False -> ok; true -> error end end, error),
    ?line check(fun() -> if False, True -> ok; true -> error end end, error),
    ?line check(fun() -> if True, True -> ok end end, ok),
    ?line check(fun() -> if False, False -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} =
			    (catch if True, False -> ok;
				      False, True -> ok;
				      False, False -> ok
				   end),
			exit
		end, exit),

    %% ',' combinations of true/false, and non-boolean in variables.

    Glurf = id(glurf),

    ?line check(fun() -> if True, Glurf -> ok; true -> error end end, error),
    ?line check(fun() -> if Glurf, True -> ok; true -> error end end, error),
    ?line check(fun() -> if True, True -> ok end end, ok),
    ?line check(fun() -> if Glurf, Glurf -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} =
			    (catch if True, Glurf -> ok;
				      Glurf, True -> ok;
				      Glurf, Glurf -> ok
				   end),
			exit
		end, exit),

    %% ',' combinations of true/false with errors.
    ATuple = id({a,b,c}),

    ?line check(fun() -> if True, element(42, ATuple) -> ok;
			    true -> error end end, error),
    ?line check(fun() -> if element(42, ATuple), True -> ok;
			    true -> error end end, error),
    ?line check(fun() -> if True, True -> ok end end, ok),
    ?line check(fun() -> if element(42, ATuple), element(42, ATuple) -> ok;
			    true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} =
			    (catch if True, element(42, ATuple) -> ok;
				      element(42, ATuple), True -> ok;
				      element(42, ATuple), element(42, ATuple) -> ok
				   end),
			exit
		end, exit),

    ok.

or_guard(Config) when is_list(Config) ->
    True = id(true),
    False = id(false),
    Glurf = id(glurf),

    %% 'or' combinations of literal true/false.
    ?line check(fun() -> if true or false -> ok end end, ok),
    ?line check(fun() -> if false or true -> ok end end, ok),
    ?line check(fun() -> if true or true -> ok end end, ok),
    ?line check(fun() -> if false or false -> ok; true -> error end end, error),

    ?line check(fun() -> if glurf or true -> ok; true -> error end end, error),
    ?line check(fun() -> if true or glurf -> ok; true -> error end end, error),
    ?line check(fun() -> if glurf or glurf -> ok; true -> error end end, error),

    ?line check(fun() ->
			{'EXIT',{if_clause,_}} = (catch if false or false -> ok end),
			exit
		end, exit),


    %% 'or' combinations using variables containing true/false.
    ?line check(fun() -> if True or False -> ok end end, ok),
    ?line check(fun() -> if False or True -> ok end end, ok),
    ?line check(fun() -> if True or True -> ok end end, ok),
    ?line check(fun() -> if False or False -> ok; true -> error end end, error),

    ?line check(fun() -> if True or Glurf -> ok; true -> error end end, error),
    ?line check(fun() -> if Glurf or True -> ok; true -> error end end, error),
    ?line check(fun() -> if Glurf or Glurf -> ok; true -> error end end, error),

    ?line check(fun() ->
			{'EXIT',{if_clause,_}} = (catch if False or False -> ok end),
			exit
		end, exit),

    ok.

more_or_guards(Config) when is_list(Config) ->
    True = id(true),
    False = id(false),
    ATuple = id({false,true,gurka}),

    ?line check(fun() ->
			if element(42, ATuple) or False -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if False or element(42, ATuple) -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if element(18, ATuple) or element(42, ATuple) -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if True or element(42, ATuple) -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if element(42, ATuple) or True -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if element(1, ATuple) or element(42, ATuple) or True -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if element(1, ATuple) or True or element(42, ATuple) -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if
			    (<<False:8>> == <<0>>) or element(2, ATuple) -> ok;
			    true -> error end
		end, error),

    ?line check(fun() ->
			if
			    element(2, ATuple) or (<<True:8>> == <<1>>) -> ok;
			    true -> error end
		end, error),

    ?line check(fun() ->
			if element(2, ATuple) or element(42, ATuple) -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if
			    element(1, ATuple) or
			    element(2, ATuple) or
			    element(19, ATuple) -> ok;
			    true -> error end
		end, error),
    ok.

complex_or_guards(Config) when is_list(Config) ->
    %% complex_or_1/2
    ?line ok = complex_or_1({a,b,c,d}, {1,2,3}),
    ?line ok = complex_or_1({a,b,c,d}, {1}),
    ?line ok = complex_or_1({a}, {1,2,3}),
    ?line error = complex_or_1({a}, {1}),

    ?line error = complex_or_1(1, 2),
    ?line error = complex_or_1([], {a,b,c,d}),
    ?line error = complex_or_1({a,b,c,d}, []),


    %% complex_or_2/1
    ?line ok = complex_or_2({true,{}}),
    ?line ok = complex_or_2({false,{a}}),
    ?line ok = complex_or_2({false,{a,b,c}}),
    ?line ok = complex_or_2({true,{a,b,c,d}}),

    ?line error = complex_or_2({blurf,{a,b,c}}),

    ?line error = complex_or_2({true}),
    ?line error = complex_or_2({true,no_tuple}),
    ?line error = complex_or_2({true,[]}),

    %% complex_or_3/2
    ?line ok = complex_or_3({true}, {}),
    ?line ok = complex_or_3({false}, {a}),
    ?line ok = complex_or_3({false}, {a,b,c}),
    ?line ok = complex_or_3({true}, {a,b,c,d}),
    ?line ok = complex_or_3({false}, <<1,2,3>>),
    ?line ok = complex_or_3({true}, <<1,2,3,4>>),

    ?line error = complex_or_3(blurf, {a,b,c}),

    ?line error = complex_or_3({false}, <<1,2,3,4>>),
    ?line error = complex_or_3([], <<1,2>>),
    ?line error = complex_or_3({true}, 45),
    ?line error = complex_or_3(<<>>, <<>>),

    %% complex_or_4/2
    ?line ok = complex_or_4(<<1,2,3>>, {true}),
    ?line ok = complex_or_4(<<1,2,3>>, {false}),
    ?line ok = complex_or_4(<<1,2,3>>, {true}),
    ?line ok = complex_or_4({1,2,3}, {true}),
    ?line error = complex_or_4({1,2,3,4}, {false}),

    ?line error = complex_or_4(<<1,2,3,4>>, []),
    ?line error = complex_or_4([], {true}),

    %% complex_or_5/2
    ?line ok = complex_or_5(<<1>>, {false}),
    ?line ok = complex_or_5(<<1,2,3>>, {true}),
    ?line ok = complex_or_5(<<1,2,3,4>>, {false}),
    ?line ok = complex_or_5({1,2,3}, {false}),
    ?line ok = complex_or_5({1,2,3,4}, {false}),

    ?line error = complex_or_5(blurf, {false}),
    ?line error = complex_or_5(<<1>>, klarf),
    ?line error = complex_or_5(blurf, klarf),

    %% complex_or_6/2
    ?line ok = complex_or_6({true,true}, {1,2,3,4}),
    ?line ok = complex_or_6({true,true}, <<1,2,3,4>>),
    ?line ok = complex_or_6({false,false}, <<1,2,3,4>>),
    ?line ok = complex_or_6({false,true}, <<1>>),
    ?line ok = complex_or_6({true,false}, {1}),
    ?line ok = complex_or_6({true,true}, {1}),

    ?line error = complex_or_6({false,false}, {1}),

    ?line error = complex_or_6({true}, {1,2,3,4}),
    ?line error = complex_or_6({}, {1,2,3,4}),
    ?line error = complex_or_6([], {1,2,3,4}),
    ?line error = complex_or_6([], {1,2,3,4}),
    ?line error = complex_or_6({true,false}, klurf),

    ok.

complex_or_1(A, B) ->
    if
	((3 < size(A)) and (size(A) < 9)) or
	((2 < size(B)) and (size(B) < 7)) -> ok;
	true -> error
    end.

complex_or_2(Tuple) ->
    if
	element(1, Tuple) or not (size(element(2, Tuple)) > 3) -> ok;
	true -> error
    end.

complex_or_3(A, B) ->
    if
	not (size(B) > 3) or element(1, A) -> ok;
	true -> error
    end.

complex_or_4(A, B) ->
    if
	not (is_tuple(A) and (size(A) > 3)) or element(1, B) -> ok;
	true -> error
    end.

complex_or_5(A, B) ->
    if
	not (is_tuple(A) or (size(A) > 3)) or not element(1, B) -> ok;
	true -> error
    end.

complex_or_6(A, B) ->
    if
	not (not element(1, A) and not element(2, A)) or
	not (not (size(B) > 3)) -> ok;
	true -> error
    end.

and_guard(Config) when is_list(Config) ->

    %% 'and' combinations of literal true/false.

    ?line check(fun() -> if true and false -> ok; true -> error end end, error),
    ?line check(fun() -> if false and true -> ok; true -> error end end, error),
    ?line check(fun() -> if true and true -> ok end end, ok),
    ?line check(fun() -> if false and false -> ok; true -> error end end, error),

    ?line check(fun() -> if glurf and true -> ok; true -> error end end, error),
    ?line check(fun() -> if true and glurf -> ok; true -> error end end, error),
    ?line check(fun() -> if glurf and glurf -> ok; true -> error end end, error),

    ?line check(fun() ->
			{'EXIT',{if_clause,_}} =
			    (catch if true and false -> ok;
				      false and true -> ok;
				      false and false -> ok
				   end),
			exit
		end, exit),

    %% 'and' combinations of true/false in variables.

    True = id(true),
    False = id(false),

    ?line check(fun() -> if True and False -> ok; true -> error end end, error),
    ?line check(fun() -> if False and True -> ok; true -> error end end, error),
    ?line check(fun() -> if True and True -> ok end end, ok),
    ?line check(fun() -> if False and False -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} =
			    (catch if True and False -> ok;
				      False and True -> ok;
				      False and False -> ok
				   end),
			exit
		end, exit),

    %% 'and' combinations of true/false and a non-boolean in variables.

    Glurf = id(glurf),

    ?line check(fun() -> if True and Glurf -> ok; true -> error end end, error),
    ?line check(fun() -> if Glurf and True -> ok; true -> error end end, error),
    ?line check(fun() -> if True and True -> ok end end, ok),
    ?line check(fun() -> if Glurf and Glurf -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} =
			    (catch if True and Glurf -> ok;
				      Glurf and True -> ok;
				      Glurf and Glurf -> ok
				   end),
			exit
		end, exit),

    %% 'and' combinations of true/false with errors.
    ATuple = id({a,b,c}),

    ?line check(fun() -> if True and element(42, ATuple) -> ok;
			    true -> error end end, error),
    ?line check(fun() -> if element(42, ATuple) and True -> ok;
			    true -> error end end, error),
    ?line check(fun() -> if True and True -> ok end end, ok),
    ?line check(fun() -> if element(42, ATuple) and element(42, ATuple) -> ok;
			    true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} =
			    (catch if True and element(42, ATuple) -> ok;
				      element(42, ATuple) and True -> ok;
				      element(42, ATuple) and element(42, ATuple) -> ok
				   end),
			exit
		end, exit),

    ?line ok = relprod({'Set',a,b}, {'Set',a,b}),

    ok.

relprod(R1, R2) when (erlang:size(R1) =:= 3) and (erlang:element(1,R1) =:= 'Set'), (erlang:size(R2) =:= 3) and (erlang:element(1,R2) =:= 'Set') ->
    ok.


xor_guard(Config) when is_list(Config) ->

    %% 'xor' combinations of literal true/false.
    ?line check(fun() -> if true xor false -> ok end end, ok),
    ?line check(fun() -> if false xor true -> ok end end, ok),
    ?line check(fun() -> if true xor true -> ok; true -> error end end, error),
    ?line check(fun() -> if false xor false -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} = (catch if false xor false -> ok end),
			exit
		end, exit),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} = (catch if true xor true -> ok end),
			exit
		end, exit),


    %% 'xor' combinations using variables containing true/false.

    True = id(true),
    False = id(false),

    ?line check(fun() -> if True xor False -> ok end end, ok),
    ?line check(fun() -> if False xor True -> ok end end, ok),
    ?line check(fun() -> if True xor True -> ok; true -> error end end, error),
    ?line check(fun() -> if False xor False -> ok; true -> error end end, error),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} = (catch if False xor False -> ok end),
			exit
		end, exit),
    ?line check(fun() ->
			{'EXIT',{if_clause,_}} = (catch if True xor True -> ok end),
			exit
		end, exit),

    ok.

more_xor_guards(Config) when is_list(Config) ->
    True = id(true),
    False = id(false),
    ATuple = id({false,true,gurka}),

    ?line check(fun() ->
			if element(42, ATuple) xor False -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if False xor element(42, ATuple) xor False -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if element(18, ATuple) xor element(42, ATuple) -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if True xor element(42, ATuple) -> ok;
			   true -> error end
		end, error),

    ?line check(fun() ->
			if element(42, ATuple) xor True -> ok;
			   true -> error end
		end, error),
    ok.

build_in_guard(Config) when is_list(Config) ->
    SubBin = <<5.0/float>>,
    ?line B = <<1,SubBin/binary,3.5/float>>,
    ?line if
	      B =:= <<1,SubBin/binary,3.5/float>> -> ok
	  end.

old_guard_tests(Config) when list(Config) ->
    %% Check that all the old guard tests are still recognized.
    ?line list = og(Config),
    ?line atom = og(an_atom),
    ?line binary = og(<<1,2>>),
    ?line float = og(3.14),
    ?line integer = og(43),
    ?line a_function = og(fun() -> ok end),
    ?line pid = og(self()),
    ?line reference = og(make_ref()),
    ?line tuple = og({}),

    ?line number = on(45.333),
    ?line number = on(-19),
    ok.

og(V) when atom(V) -> atom;
og(V) when binary(V) -> binary;
og(V) when float(V) -> float;
og(V) when integer(V) -> integer;
og(V) when function(V) -> a_function;
og(V) when list(V) -> list;
og(V) when pid(V) -> pid;
og(V) when port(V) -> port;
og(V) when reference(V) -> reference;
og(V) when tuple(V) -> tuple;
og(_) -> what.

on(V) when number(V) -> number;
on(_) -> not_number.

gbif(Config) when is_list(Config) ->
    ?line error = gbif_1(1, {false,true}),
    ?line ok = gbif_1(2, {false,true}),
    ok.

gbif_1(P, T) when element(P, T) -> ok;
gbif_1(_, _) -> error.


t_is_boolean(Config) when is_list(Config) ->
    ?line true = is_boolean(true),
    ?line true = is_boolean(false),
    ?line true = is_boolean(id(true)),
    ?line true = is_boolean(id(false)),

    ?line false = is_boolean(glurf),
    ?line false = is_boolean(id(glurf)),

    ?line false = is_boolean([]),
    ?line false = is_boolean(id([])),
    ?line false = is_boolean(42),
    ?line false = is_boolean(id(-42)),

    ?line false = is_boolean(math:pi()),
    ?line false = is_boolean(384793478934378924978439789873478934897),

    ?line false = is_boolean(id(self())),
    ?line false = is_boolean(id({x,y,z})),
    ?line false = is_boolean(id([a,b,c])),
    ?line false = is_boolean(id(make_ref())),
    ?line false = is_boolean(id(<<1,2,3>>)),

    ?line ok = bool(true),
    ?line ok = bool(false),
    ?line ok = bool(id(true)),
    ?line ok = bool(id(false)),

    ?line error = bool(glurf),
    ?line error = bool(id(glurf)),

    ?line error = bool([]),
    ?line error = bool(id([])),
    ?line error = bool(42),
    ?line error = bool(id(-42)),

    ?line error = bool(math:pi()),
    ?line error = bool(384793478934378924978439789873478934897),

    ?line error = bool(id(self())),
    ?line error = bool(id({x,y,z})),
    ?line error = bool(id([a,b,c])),
    ?line error = bool(id(make_ref())),
    ?line error = bool(id(<<1,2,3>>)),

    ok.

bool(X) when is_boolean(X) -> ok;
bool(_) -> error.


is_function_2(Config) when is_list(Config) ->
    true = is_function(id(fun ?MODULE:all/1), 1),
    true = is_function(id(fun() -> ok end), 0),
    false = is_function(id(fun ?MODULE:all/1), 0),
    false = is_function(id(fun() -> ok end), 1),

    F = fun(_) -> ok end,
    if
	is_function(F, 1) -> ok
    end.

tricky(Config) when is_list(Config) ->
    ?line not_ok = tricky_1(1, 2),
    ?line not_ok = tricky_1(1, blurf),
    ?line not_ok = tricky_1(foo, 2),
    ?line not_ok = tricky_1(a, b),

    ?line false = rb(100000, [1], 42),
    ?line true = rb(100000, [], 42),
    ?line true = rb(555, [a,b,c], 19),
    ok.

tricky_1(X, Y) when abs((X == 1) or (Y == 2)) -> ok;
tricky_1(_, _) -> not_ok.

%% From dets_v9:read_buckets/11, simplified.

rb(Size, ToRead, SoFar) when SoFar + Size < 81920; ToRead == [] -> true;
rb(_, _, _) -> false.


-define(T(Op,A,B),
	ok = if A Op B -> ok; true -> error end,
	ok = if not (A Op B) -> error; true -> ok end,
	(fun(X, Y, True, False) ->
		 ok = if X Op Y -> ok; true -> error end,
		 ok = if False; X Op Y; False -> ok; true -> error end,
		 ok = if X Op Y, True -> ok; true -> error end,
		 ok = if not (X Op Y) -> error; true -> ok end,
		 ok = if False; not (X Op Y); False -> error; true -> ok end
	 end)(id(A), id(B), id(true), id(false))).

-define(F(Op,A,B),
	ok = if A Op B -> error; true -> ok end,
	ok = if not (A Op B) -> ok; true -> error end,
	(fun(X, Y, True, False) ->
		 ok = if X Op Y -> error; true -> ok end,
		 ok = if False; X Op Y; False -> error; true -> ok end,
		 ok = if not (X Op Y); False -> ok; true -> error end,
		 ok = if not (X Op Y), True -> ok; true -> error end
	 end)(id(A), id(B), id(true), id(false))).


rel_ops(Config) when is_list(Config) ->
    ?line ?T(=/=, 1, 1.0),
    ?line ?F(=/=, 2, 2),
    ?line ?F(=/=, {a}, {a}),

    ?line ?F(/=, a, a),
    ?line ?F(/=, 0, 0.0),
    ?line ?T(/=, 0, 1),
    ?line ?F(/=, {a}, {a}),

    ?line ?T(==, 1, 1.0),
    ?line ?F(==, a, {}),

    ?line ?F(=:=, 1, 1.0),
    ?line ?T(=:=, 42.0, 42.0),

    ?line ?F(>, a, b),
    ?line ?T(>, 42, 1.0),
    ?line ?F(>, 42, 42.0),

    ?line ?T(<, a, b),
    ?line ?F(<, 42, 1.0),
    ?line ?F(<, 42, 42.0),

    ?line ?T(=<, 1.5, 5),
    ?line ?F(=<, -9, -100.344),
    ?line ?T(=<, 42, 42.0),

    ?line ?T(>=, 42, 42.0),
    ?line ?F(>=, a, b),
    ?line ?T(>=, 1.0, 0),

    ok.

-undef(TestOp).

basic_andalso_orelse(Config) when is_list(Config) ->
    ?line T = id({type,integers,23,42}),
    ?line 65 = if
		   ((element(1, T) =:= type) andalso (size(T) =:= 4) andalso
		    element(2, T) == integers) ->
		       element(3, T) + element(4, T);
		   true -> error
	       end,
    ?line 65 = case [] of
		   [] when ((element(1, T) =:= type) andalso (size(T) =:= 4) andalso
			    element(2, T) == integers) ->
		       element(3, T) + element(4, T)
	       end,

    ?line 42 = basic_rt({type,integers,40,2}),
    ?line 5.0 = basic_rt({vector,{3.0,4.0}}),
    ?line 20 = basic_rt(['+',3,7]),
    ?line {'Set',a,b} = basic_rt({{'Set',a,b},{'Set',a,b}}),
    ?line 12 = basic_rt({klurf,4}),

    ?line error = basic_rt({type,integers,40,2,3}),
    ?line error = basic_rt({kalle,integers,40,2}),
    ?line error = basic_rt({kalle,integers,40,2}),
    ?line error = basic_rt({1,2}),
    ?line error = basic_rt([]),

    RelProdBody =
	fun(R1, R2) ->
		if
		    (erlang:size(R1) =:= 3) andalso (erlang:element(1,R1) =:= 'Set'),
		    (erlang:size(R2) =:= 3) andalso (erlang:element(1,R2) =:= 'Set') ->
			ok
		end
	end,

    ?line ok = RelProdBody({'Set',a,b}, {'Set',a,b}),
    ok.

basic_rt(T) when is_tuple(T) andalso size(T) =:= 4 andalso element(1, T) =:= type andalso
		 element(2, T) == integers ->
    element(3, T) + element(4, T);
basic_rt(T) when is_tuple(T) andalso size(T) =:= 2 andalso element(1, T) =:= vector ->
    {X,Y} = element(2, T),
    if
	is_float(X), is_float(Y) ->
	    math:sqrt(X*X+Y*Y)
    end;
basic_rt(['+',A,B]) ->
    2*id(A+B);
basic_rt({R1,R2}) when erlang:size(R1) =:= 3 andalso erlang:element(1,R1) =:= 'Set',
		       erlang:size(R2) =:= 3 andalso erlang:element(1,R2) =:= 'Set' ->
    R1 = id(R1),
    R2 = id(R2),
    R1;
basic_rt(T) when is_tuple(T) andalso size(T) =:= 2 andalso element(1, T) =:= klurf ->
    3*id(element(2, T));
basic_rt(_) ->
    error.

traverse_dcd(Config) when is_list(Config) ->
    L0 = [{log_header,dcd_log,"1.0",a,b,c},{log_header,dcd_log,"2.0",a,b,c},
	  {log_header,dcd_log,"0.0",a,b,c},blurf],
    {cont,[{log_header,dcd_log,"0.0",a,b,c},blurf],log,funny} =
	traverse_dcd({cont,L0}, log, funny),
    L1 = [{log_header,dcd_log,"1.0"}],
    {cont,L1,log,funny} = traverse_dcd({cont,L1}, log, funny),
    L2 = [{a,tuple}],
    {cont,L2,log,funny} = traverse_dcd({cont,L2}, log, funny),
    ok.

%% The function starts out with 3 arguments in {x,0}, {x,1}, {x,2}.
%% The outer match of a two tuple will places the first element in {x,3} and
%% second in {x,4}. The guard for the first clause must make ensure that all of those
%% registers are restored befor entering the second clause.
%%
%% (From mnesia_checkpoint.erl, modified.)

traverse_dcd({Cont,[LogH|Rest]},Log,Fun)
  when is_tuple(LogH) andalso size(LogH) =:= 6 andalso element(1, LogH) =:= log_header
andalso erlang:element(2,LogH) == dcd_log,
is_tuple(LogH) andalso size(LogH) =:= 6 andalso element(1, LogH) =:= log_header
andalso erlang:element(3,LogH) >= "1.0" ->
    traverse_dcd({Cont,Rest},Log,Fun);
traverse_dcd({Cont,Recs},Log,Fun) ->
    {Cont,Recs,Log,Fun}.


check_qlc_hrl(Config) when is_list(Config) ->
    St = {r1,false,dum},
    ?line foo = cqlc(qlc, q, [{lc,1,2,3}], St),
    ?line foo = cqlc(qlc, q, [{lc,1,2,3},b], St),
    ?line St = cqlc(qlc, q, [], St),
    ?line St = cqlc(qlc, blurf, [{lc,1,2,3},b], St),
    ?line St = cqlc(q, q, [{lc,1,2,3},b], St),
    ?line St = cqlc(qlc, q, [{lc,1,2,3},b,c], St),
    ?line St = cqlc(qlc, q, [a,b], St),
    ?line {r1,true,kalle} = cqlc(qlc, q, [{lc,1,2,3},b], {r1,true,kalle}),
    ok.

%% From erl_lint.erl; original name was check_qlc_hrl/4.
cqlc(M, F, As, St) ->
    Arity = length(As),
    case As of
        [{lc,_L,_E,_Qs}|_] when M =:= qlc, F =:= q,
                                Arity < 3,
                                not (((element(1, St) =:= r1) orelse fail) and (size(St) =:= 3) and element(2, St)) ->
            foo;
        _ ->
            St
    end.

%% OTP-7679: Thanks to Hunter Morris.
andalso_semi(Config) when is_list(Config) ->
    ?line ok = andalso_semi_foo(0),
    ?line ok = andalso_semi_foo(1),
    ?line fc(catch andalso_semi_foo(2)),

    ?line ok = andalso_semi_bar([a,b,c]),
    ?line ok = andalso_semi_bar(1),
    ?line fc(catch andalso_semi_bar([a,b])),
    ok.

andalso_semi_foo(Bar) when is_integer(Bar) andalso Bar =:= 0; Bar =:= 1 ->
   ok.

andalso_semi_bar(Bar) when is_list(Bar) andalso length(Bar) =:= 3; Bar =:= 1 ->
   ok.


t_tuple_size(Config) when is_list(Config) ->
    ?line 10 = do_tuple_size({1,2,3,4}),
    ?line fc(catch do_tuple_size({1,2,3})),
    ?line fc(catch do_tuple_size(42)),

    ?line error = ludicrous_tuple_size({a,b,c}),
    ?line error = ludicrous_tuple_size([a,b,c]),

    ok.

do_tuple_size(T) when tuple_size(T) =:= 4 ->
    {A,B,C,D} = T,
    A+B+C+D.

ludicrous_tuple_size(T)
  when tuple_size(T) =:= 16#7777777777777777777777777777777777 -> ok;
ludicrous_tuple_size(T)
  when tuple_size(T) =:= 16#10000000000000000 -> ok;
ludicrous_tuple_size(T)
  when tuple_size(T) =:= (1 bsl 64) - 1 -> ok;
ludicrous_tuple_size(T)
  when tuple_size(T) =:= 16#FFFFFFFFFFFFFFFF -> ok;
ludicrous_tuple_size(_) -> error.

%%
%% The binary_part/2,3 guard BIFs
%%
-define(MASK_ERROR(EXPR),mask_error((catch (EXPR)))).
mask_error({'EXIT',{Err,_}}) ->
    Err;
mask_error(Else) ->
    Else.

binary_part(doc) ->
    ["Tests the binary_part/2,3 guard (GC) bif's"];
binary_part(Config) when is_list(Config) ->
    %% This is more or less a copy of what the guard_SUITE in emulator
    %% does to cover the guard bif's
    ?line 1 = bptest(<<1,2,3>>),
    ?line 2 = bptest(<<2,1,3>>),
    ?line error = bptest(<<1>>),
    ?line error = bptest(<<>>),
    ?line error = bptest(apa),
    ?line 3 = bptest(<<2,3,3>>),
    % With one variable (pos)
    ?line 1 = bptest(<<1,2,3>>,1),
    ?line 2 = bptest(<<2,1,3>>,1),
    ?line error = bptest(<<1>>,1),
    ?line error = bptest(<<>>,1),
    ?line error = bptest(apa,1),
    ?line 3 = bptest(<<2,3,3>>,1),
    % With one variable (length)
    ?line 1 = bptesty(<<1,2,3>>,1),
    ?line 2 = bptesty(<<2,1,3>>,1),
    ?line error = bptesty(<<1>>,1),
    ?line error = bptesty(<<>>,1),
    ?line error = bptesty(apa,1),
    ?line 3 = bptesty(<<2,3,3>>,2),
    % With one variable (whole tuple)
    ?line 1 = bptestx(<<1,2,3>>,{1,1}),
    ?line 2 = bptestx(<<2,1,3>>,{1,1}),
    ?line error = bptestx(<<1>>,{1,1}),
    ?line error = bptestx(<<>>,{1,1}),
    ?line error = bptestx(apa,{1,1}),
    ?line 3 = bptestx(<<2,3,3>>,{1,2}),
    % With two variables
    ?line 1 = bptest(<<1,2,3>>,1,1),
    ?line 2 = bptest(<<2,1,3>>,1,1),
    ?line error = bptest(<<1>>,1,1),
    ?line error = bptest(<<>>,1,1),
    ?line error = bptest(apa,1,1),
    ?line 3 = bptest(<<2,3,3>>,1,2),
    % Direct (autoimported) call, these will be evaluated by the compiler...
    ?line <<2>> = binary_part(<<1,2,3>>,1,1),
    ?line <<1>> = binary_part(<<2,1,3>>,1,1),
    % Compiler warnings due to constant evaluation expected (3)
    ?line badarg = ?MASK_ERROR(binary_part(<<1>>,1,1)),
    ?line badarg = ?MASK_ERROR(binary_part(<<>>,1,1)),
    ?line badarg = ?MASK_ERROR(binary_part(apa,1,1)),
    ?line <<3,3>> = binary_part(<<2,3,3>>,1,2),
    % Direct call through apply
    ?line <<2>> = apply(erlang,binary_part,[<<1,2,3>>,1,1]),
    ?line <<1>> = apply(erlang,binary_part,[<<2,1,3>>,1,1]),
    % Compiler warnings due to constant evaluation expected (3)
    ?line badarg = ?MASK_ERROR(apply(erlang,binary_part,[<<1>>,1,1])),
    ?line badarg = ?MASK_ERROR(apply(erlang,binary_part,[<<>>,1,1])),
    ?line badarg = ?MASK_ERROR(apply(erlang,binary_part,[apa,1,1])),
    ?line <<3,3>> = apply(erlang,binary_part,[<<2,3,3>>,1,2]),
    % Constant propagation
    ?line  Bin = <<1,2,3>>,
    ?line  ok = if
		    binary_part(Bin,1,1) =:= <<2>> ->
			ok;
		    %% Compiler warning, clause cannot match (expected)
		    true ->
			error
		end,
    ?line  ok = if
		    binary_part(Bin,{1,1}) =:= <<2>> ->
			ok;
		    %% Compiler warning, clause cannot match (expected)
		    true ->
			error
		end,
    ok.


bptest(B) when length(B) =:= 1337 ->
    1;
bptest(B) when binary_part(B,{1,1}) =:= <<2>> ->
    1;
bptest(B) when erlang:binary_part(B,1,1) =:= <<1>> ->
    2;
bptest(B)  when erlang:binary_part(B,{1,2}) =:= <<3,3>> ->
    3;
bptest(_) ->
    error.

bptest(B,A) when length(B) =:= A ->
    1;
bptest(B,A) when binary_part(B,{A,1}) =:= <<2>> ->
    1;
bptest(B,A) when erlang:binary_part(B,A,1) =:= <<1>> ->
    2;
bptest(B,A)  when erlang:binary_part(B,{A,2}) =:= <<3,3>> ->
    3;
bptest(_,_) ->
    error.

bptestx(B,A) when length(B) =:= A ->
    1;
bptestx(B,A) when binary_part(B,A) =:= <<2>> ->
    1;
bptestx(B,A) when erlang:binary_part(B,A) =:= <<1>> ->
    2;
bptestx(B,A)  when erlang:binary_part(B,A) =:= <<3,3>> ->
    3;
bptestx(_,_) ->
    error.

bptesty(B,A) when length(B) =:= A ->
    1;
bptesty(B,A) when binary_part(B,{1,A}) =:= <<2>> ->
    1;
bptesty(B,A) when erlang:binary_part(B,1,A) =:= <<1>> ->
    2;
bptesty(B,A)  when erlang:binary_part(B,{1,A}) =:= <<3,3>> ->
    3;
bptesty(_,_) ->
    error.

bptest(B,A,_C) when length(B) =:= A ->
    1;
bptest(B,A,C) when binary_part(B,{A,C}) =:= <<2>> ->
    1;
bptest(B,A,C) when erlang:binary_part(B,A,C) =:= <<1>> ->
    2;
bptest(B,A,C)  when erlang:binary_part(B,{A,C}) =:= <<3,3>> ->
    3;
bptest(_,_,_) ->
    error.

-define(FAILING(C),
	if
	    C -> ?t:fail(should_fail);
	    true -> ok
	end,
	if
	    true, C -> ?t:fail(should_fail);
	    true -> ok
	end).

bad_constants(Config) when is_list(Config) ->
    ?line ?FAILING(false),
    ?line ?FAILING([]),
    ?line ?FAILING([a]),
    ?line ?FAILING([Config]),
    ?line ?FAILING({a,b}),
    ?line ?FAILING({a,Config}),
    ?line ?FAILING(<<1>>),
    ?line ?FAILING(42),
    ?line ?FAILING(3.14),
    ok.

%% Call this function to turn off constant propagation.
id(I) -> I.

check(F, Result) ->
    case F() of
	Result -> ok;
	Other ->
	    io:format("Expected: ~p\n", [Result]),
	    io:format("     Got: ~p\n", [Other]),
	    test_server:fail()
    end.

fc({'EXIT',{function_clause,_}}) -> ok.