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t/op/loopctl.t using test.pl
[perl5.git] / t / op / loopctl.t
CommitLineData
36c66720
RH
1#!./perl
2
3# We have the following types of loop:
4#
5# 1a) while(A) {B}
6# 1b) B while A;
7#
8# 2a) until(A) {B}
9# 2b) B until A;
10#
11# 3a) for(@A) {B}
12# 3b) B for A;
13#
14# 4a) for (A;B;C) {D}
15#
16# 5a) { A } # a bare block is a loop which runs once
17#
18# Loops of type (b) don't allow for next/last/redo style
19# control, so we ignore them here. Type (a) loops can
20# all be labelled, so there are ten possibilities (each
21# of 5 types, labelled/unlabelled). We therefore need
22# thirty tests to try the three control statements against
23# the ten types of loop. For the first four types it's useful
24# to distinguish the case where next re-iterates from the case
25# where it leaves the loop. That makes 38.
26# All these tests rely on "last LABEL"
27# so if they've *all* failed, maybe you broke that...
28#
29# These tests are followed by an extra test of nested loops.
30# Feel free to add more here.
31#
32# -- .robin. <robin@kitsite.com> 2001-03-13
de29acd5
DL
33BEGIN {
34 chdir 't' if -d 't';
35 @INC = qw(. ../lib);
36}
36c66720 37
de29acd5
DL
38require "test.pl";
39plan( tests => 47 );
36c66720
RH
40
41my $ok;
42
de29acd5 43TEST1: {
36c66720
RH
44
45 $ok = 0;
46
47 my $x = 1;
48 my $first_time = 1;
49 while($x--) {
50 if (!$first_time) {
51 $ok = 1;
52 last TEST1;
53 }
54 $ok = 0;
55 $first_time = 0;
56 redo;
57 last TEST1;
58 }
59 continue {
60 $ok = 0;
61 last TEST1;
62 }
63 $ok = 0;
64}
de29acd5 65cmp_ok($ok,'==',1,'no label on while()');
36c66720 66
de29acd5 67TEST2: {
36c66720
RH
68
69 $ok = 0;
70
71 my $x = 2;
72 my $first_time = 1;
73 my $been_in_continue = 0;
74 while($x--) {
75 if (!$first_time) {
76 $ok = $been_in_continue;
77 last TEST2;
78 }
79 $ok = 0;
80 $first_time = 0;
81 next;
82 last TEST2;
83 }
84 continue {
85 $been_in_continue = 1;
86 }
87 $ok = 0;
88}
de29acd5 89cmp_ok($ok,'==',1,'no label on while() successful next');
36c66720 90
de29acd5 91TEST3: {
36c66720
RH
92
93 $ok = 0;
94
95 my $x = 1;
96 my $first_time = 1;
97 my $been_in_loop = 0;
98 my $been_in_continue = 0;
99 while($x--) {
100 $been_in_loop = 1;
101 if (!$first_time) {
102 $ok = 0;
103 last TEST3;
104 }
105 $ok = 0;
106 $first_time = 0;
107 next;
108 last TEST3;
109 }
110 continue {
111 $been_in_continue = 1;
112 }
113 $ok = $been_in_loop && $been_in_continue;
114}
de29acd5 115cmp_ok($ok,'==',1,'no label on while() unsuccessful next');
36c66720 116
de29acd5 117TEST4: {
36c66720
RH
118
119 $ok = 0;
120
121 my $x = 1;
122 my $first_time = 1;
123 while($x++) {
124 if (!$first_time) {
125 $ok = 0;
126 last TEST4;
127 }
128 $ok = 0;
129 $first_time = 0;
130 last;
131 last TEST4;
132 }
133 continue {
134 $ok = 0;
135 last TEST4;
136 }
137 $ok = 1;
138}
de29acd5 139cmp_ok($ok,'==',1,'no label on while() last');
36c66720 140
de29acd5 141TEST5: {
36c66720
RH
142
143 $ok = 0;
144
145 my $x = 0;
146 my $first_time = 1;
147 until($x++) {
148 if (!$first_time) {
149 $ok = 1;
150 last TEST5;
151 }
152 $ok = 0;
153 $first_time = 0;
154 redo;
155 last TEST5;
156 }
157 continue {
158 $ok = 0;
159 last TEST5;
160 }
161 $ok = 0;
162}
de29acd5 163cmp_ok($ok,'==',1,'no label on until()');
36c66720 164
de29acd5 165TEST6: {
36c66720
RH
166
167 $ok = 0;
168
169 my $x = 0;
170 my $first_time = 1;
171 my $been_in_continue = 0;
172 until($x++ >= 2) {
173 if (!$first_time) {
174 $ok = $been_in_continue;
175 last TEST6;
176 }
177 $ok = 0;
178 $first_time = 0;
179 next;
180 last TEST6;
181 }
182 continue {
183 $been_in_continue = 1;
184 }
185 $ok = 0;
186}
de29acd5 187cmp_ok($ok,'==',1,'no label on until() successful next');
36c66720 188
de29acd5 189TEST7: {
36c66720
RH
190
191 $ok = 0;
192
193 my $x = 0;
194 my $first_time = 1;
195 my $been_in_loop = 0;
196 my $been_in_continue = 0;
197 until($x++) {
198 $been_in_loop = 1;
199 if (!$first_time) {
200 $ok = 0;
201 last TEST7;
202 }
203 $ok = 0;
204 $first_time = 0;
205 next;
206 last TEST7;
207 }
208 continue {
209 $been_in_continue = 1;
210 }
211 $ok = $been_in_loop && $been_in_continue;
212}
de29acd5 213cmp_ok($ok,'==',1,'no label on until() unsuccessful next');
36c66720 214
de29acd5 215TEST8: {
36c66720
RH
216
217 $ok = 0;
218
219 my $x = 0;
220 my $first_time = 1;
221 until($x++ == 10) {
222 if (!$first_time) {
223 $ok = 0;
224 last TEST8;
225 }
226 $ok = 0;
227 $first_time = 0;
228 last;
229 last TEST8;
230 }
231 continue {
232 $ok = 0;
233 last TEST8;
234 }
235 $ok = 1;
236}
de29acd5 237cmp_ok($ok,'==',1,'no label on until() last');
36c66720 238
de29acd5 239TEST9: {
36c66720
RH
240
241 $ok = 0;
242
243 my $first_time = 1;
244 for(1) {
245 if (!$first_time) {
246 $ok = 1;
247 last TEST9;
248 }
249 $ok = 0;
250 $first_time = 0;
251 redo;
252 last TEST9;
253 }
254 continue {
255 $ok = 0;
256 last TEST9;
257 }
258 $ok = 0;
259}
de29acd5 260cmp_ok($ok,'==',1,'no label on for(@array)');
36c66720 261
de29acd5 262TEST10: {
36c66720
RH
263
264 $ok = 0;
265
266 my $first_time = 1;
267 my $been_in_continue = 0;
268 for(1,2) {
269 if (!$first_time) {
270 $ok = $been_in_continue;
271 last TEST10;
272 }
273 $ok = 0;
274 $first_time = 0;
275 next;
276 last TEST10;
277 }
278 continue {
279 $been_in_continue = 1;
280 }
281 $ok = 0;
282}
de29acd5 283cmp_ok($ok,'==',1,'no label on for(@array) successful next');
36c66720 284
de29acd5 285TEST11: {
36c66720
RH
286
287 $ok = 0;
288
289 my $first_time = 1;
290 my $been_in_loop = 0;
291 my $been_in_continue = 0;
292 for(1) {
293 $been_in_loop = 1;
294 if (!$first_time) {
295 $ok = 0;
296 last TEST11;
297 }
298 $ok = 0;
299 $first_time = 0;
300 next;
301 last TEST11;
302 }
303 continue {
304 $been_in_continue = 1;
305 }
306 $ok = $been_in_loop && $been_in_continue;
307}
de29acd5 308cmp_ok($ok,'==',1,'no label on for(@array) unsuccessful next');
36c66720 309
de29acd5 310TEST12: {
36c66720
RH
311
312 $ok = 0;
313
314 my $first_time = 1;
315 for(1..10) {
316 if (!$first_time) {
317 $ok = 0;
318 last TEST12;
319 }
320 $ok = 0;
321 $first_time = 0;
322 last;
323 last TEST12;
324 }
325 continue {
326 $ok=0;
327 last TEST12;
328 }
329 $ok = 1;
330}
de29acd5 331cmp_ok($ok,'==',1,'no label on for(@array) last');
36c66720 332
de29acd5 333TEST13: {
36c66720
RH
334
335 $ok = 0;
336
337 for(my $first_time = 1; 1;) {
338 if (!$first_time) {
339 $ok = 1;
340 last TEST13;
341 }
342 $ok = 0;
343 $first_time=0;
344
345 redo;
346 last TEST13;
347 }
348 $ok = 0;
349}
de29acd5 350cmp_ok($ok,'==',1,'no label on for(;;)');
36c66720 351
de29acd5 352TEST14: {
36c66720
RH
353
354 $ok = 0;
355
356 for(my $first_time = 1; 1; $first_time=0) {
357 if (!$first_time) {
358 $ok = 1;
359 last TEST14;
360 }
361 $ok = 0;
362 next;
363 last TEST14;
364 }
365 $ok = 0;
366}
de29acd5 367cmp_ok($ok,'==',1,'no label on for(;;) successful next');
36c66720 368
de29acd5 369TEST15: {
36c66720
RH
370
371 $ok = 0;
372
373 my $x=1;
374 my $been_in_loop = 0;
375 for(my $first_time = 1; $x--;) {
376 $been_in_loop = 1;
377 if (!$first_time) {
378 $ok = 0;
379 last TEST15;
380 }
381 $ok = 0;
382 $first_time = 0;
383 next;
384 last TEST15;
385 }
386 $ok = $been_in_loop;
387}
de29acd5 388cmp_ok($ok,'==',1,'no label on for(;;) unsuccessful next');
36c66720 389
de29acd5 390TEST16: {
36c66720
RH
391
392 $ok = 0;
393
394 for(my $first_time = 1; 1; last TEST16) {
395 if (!$first_time) {
396 $ok = 0;
397 last TEST16;
398 }
399 $ok = 0;
400 $first_time = 0;
401 last;
402 last TEST16;
403 }
404 $ok = 1;
405}
de29acd5 406cmp_ok($ok,'==',1,'no label on for(;;) last');
36c66720 407
de29acd5 408TEST17: {
36c66720
RH
409
410 $ok = 0;
411 my $first_time = 1;
412
413 {
414 if (!$first_time) {
415 $ok = 1;
416 last TEST17;
417 }
418 $ok = 0;
419 $first_time=0;
420
421 redo;
422 last TEST17;
423 }
424 continue {
425 $ok = 0;
426 last TEST17;
427 }
428 $ok = 0;
429}
de29acd5 430cmp_ok($ok,'==',1,'no label on bare block');
36c66720 431
de29acd5 432TEST18: {
36c66720
RH
433
434 $ok = 0;
435 {
436 next;
437 last TEST18;
438 }
439 continue {
440 $ok = 1;
441 last TEST18;
442 }
443 $ok = 0;
444}
de29acd5 445cmp_ok($ok,'==',1,'no label on bare block next');
36c66720 446
de29acd5 447TEST19: {
36c66720
RH
448
449 $ok = 0;
450 {
451 last;
452 last TEST19;
453 }
454 continue {
455 $ok = 0;
456 last TEST19;
457 }
458 $ok = 1;
459}
de29acd5 460cmp_ok($ok,'==',1,'no label on bare block last');
36c66720
RH
461
462### Now do it all again with labels
463
de29acd5 464TEST20: {
36c66720
RH
465
466 $ok = 0;
467
468 my $x = 1;
469 my $first_time = 1;
470 LABEL20: while($x--) {
471 if (!$first_time) {
472 $ok = 1;
473 last TEST20;
474 }
475 $ok = 0;
476 $first_time = 0;
477 redo LABEL20;
478 last TEST20;
479 }
480 continue {
481 $ok = 0;
482 last TEST20;
483 }
484 $ok = 0;
485}
de29acd5 486cmp_ok($ok,'==',1,'label on while()');
36c66720 487
de29acd5 488TEST21: {
36c66720
RH
489
490 $ok = 0;
491
492 my $x = 2;
493 my $first_time = 1;
494 my $been_in_continue = 0;
495 LABEL21: while($x--) {
496 if (!$first_time) {
497 $ok = $been_in_continue;
498 last TEST21;
499 }
500 $ok = 0;
501 $first_time = 0;
502 next LABEL21;
503 last TEST21;
504 }
505 continue {
506 $been_in_continue = 1;
507 }
508 $ok = 0;
509}
de29acd5 510cmp_ok($ok,'==',1,'label on while() successful next');
36c66720 511
de29acd5 512TEST22: {
36c66720
RH
513
514 $ok = 0;
515
516 my $x = 1;
517 my $first_time = 1;
518 my $been_in_loop = 0;
519 my $been_in_continue = 0;
520 LABEL22: while($x--) {
521 $been_in_loop = 1;
522 if (!$first_time) {
523 $ok = 0;
524 last TEST22;
525 }
526 $ok = 0;
527 $first_time = 0;
528 next LABEL22;
529 last TEST22;
530 }
531 continue {
532 $been_in_continue = 1;
533 }
534 $ok = $been_in_loop && $been_in_continue;
535}
de29acd5 536cmp_ok($ok,'==',1,'label on while() unsuccessful next');
36c66720 537
de29acd5 538TEST23: {
36c66720
RH
539
540 $ok = 0;
541
542 my $x = 1;
543 my $first_time = 1;
544 LABEL23: while($x++) {
545 if (!$first_time) {
546 $ok = 0;
547 last TEST23;
548 }
549 $ok = 0;
550 $first_time = 0;
551 last LABEL23;
552 last TEST23;
553 }
554 continue {
555 $ok = 0;
556 last TEST23;
557 }
558 $ok = 1;
559}
de29acd5 560cmp_ok($ok,'==',1,'label on while() last');
36c66720 561
de29acd5 562TEST24: {
36c66720
RH
563
564 $ok = 0;
565
566 my $x = 0;
567 my $first_time = 1;
568 LABEL24: until($x++) {
569 if (!$first_time) {
570 $ok = 1;
571 last TEST24;
572 }
573 $ok = 0;
574 $first_time = 0;
575 redo LABEL24;
576 last TEST24;
577 }
578 continue {
579 $ok = 0;
580 last TEST24;
581 }
582 $ok = 0;
583}
de29acd5 584cmp_ok($ok,'==',1,'label on until()');
36c66720 585
de29acd5 586TEST25: {
36c66720
RH
587
588 $ok = 0;
589
590 my $x = 0;
591 my $first_time = 1;
592 my $been_in_continue = 0;
593 LABEL25: until($x++ >= 2) {
594 if (!$first_time) {
595 $ok = $been_in_continue;
596 last TEST25;
597 }
598 $ok = 0;
599 $first_time = 0;
600 next LABEL25;
601 last TEST25;
602 }
603 continue {
604 $been_in_continue = 1;
605 }
606 $ok = 0;
607}
de29acd5 608cmp_ok($ok,'==',1,'label on until() successful next');
36c66720 609
de29acd5 610TEST26: {
36c66720
RH
611
612 $ok = 0;
613
614 my $x = 0;
615 my $first_time = 1;
616 my $been_in_loop = 0;
617 my $been_in_continue = 0;
618 LABEL26: until($x++) {
619 $been_in_loop = 1;
620 if (!$first_time) {
621 $ok = 0;
622 last TEST26;
623 }
624 $ok = 0;
625 $first_time = 0;
626 next LABEL26;
627 last TEST26;
628 }
629 continue {
630 $been_in_continue = 1;
631 }
632 $ok = $been_in_loop && $been_in_continue;
633}
de29acd5 634cmp_ok($ok,'==',1,'label on until() unsuccessful next');
36c66720 635
de29acd5 636TEST27: {
36c66720
RH
637
638 $ok = 0;
639
640 my $x = 0;
641 my $first_time = 1;
642 LABEL27: until($x++ == 10) {
643 if (!$first_time) {
644 $ok = 0;
645 last TEST27;
646 }
647 $ok = 0;
648 $first_time = 0;
649 last LABEL27;
650 last TEST27;
651 }
652 continue {
653 $ok = 0;
654 last TEST8;
655 }
656 $ok = 1;
657}
de29acd5 658cmp_ok($ok,'==',1,'label on until() last');
36c66720 659
de29acd5 660TEST28: {
36c66720
RH
661
662 $ok = 0;
663
664 my $first_time = 1;
665 LABEL28: for(1) {
666 if (!$first_time) {
667 $ok = 1;
668 last TEST28;
669 }
670 $ok = 0;
671 $first_time = 0;
672 redo LABEL28;
673 last TEST28;
674 }
675 continue {
676 $ok = 0;
677 last TEST28;
678 }
679 $ok = 0;
680}
de29acd5 681cmp_ok($ok,'==',1,'label on for(@array)');
36c66720 682
de29acd5 683TEST29: {
36c66720
RH
684
685 $ok = 0;
686
687 my $first_time = 1;
688 my $been_in_continue = 0;
689 LABEL29: for(1,2) {
690 if (!$first_time) {
691 $ok = $been_in_continue;
692 last TEST29;
693 }
694 $ok = 0;
695 $first_time = 0;
696 next LABEL29;
697 last TEST29;
698 }
699 continue {
700 $been_in_continue = 1;
701 }
702 $ok = 0;
703}
de29acd5 704cmp_ok($ok,'==',1,'label on for(@array) successful next');
36c66720 705
de29acd5 706TEST30: {
36c66720
RH
707
708 $ok = 0;
709
710 my $first_time = 1;
711 my $been_in_loop = 0;
712 my $been_in_continue = 0;
713 LABEL30: for(1) {
714 $been_in_loop = 1;
715 if (!$first_time) {
716 $ok = 0;
717 last TEST30;
718 }
719 $ok = 0;
720 $first_time = 0;
721 next LABEL30;
722 last TEST30;
723 }
724 continue {
725 $been_in_continue = 1;
726 }
727 $ok = $been_in_loop && $been_in_continue;
728}
de29acd5 729cmp_ok($ok,'==',1,'label on for(@array) unsuccessful next');
36c66720 730
de29acd5 731TEST31: {
36c66720
RH
732
733 $ok = 0;
734
735 my $first_time = 1;
736 LABEL31: for(1..10) {
737 if (!$first_time) {
738 $ok = 0;
739 last TEST31;
740 }
741 $ok = 0;
742 $first_time = 0;
743 last LABEL31;
744 last TEST31;
745 }
746 continue {
747 $ok=0;
748 last TEST31;
749 }
750 $ok = 1;
751}
de29acd5 752cmp_ok($ok,'==',1,'label on for(@array) last');
36c66720 753
de29acd5 754TEST32: {
36c66720
RH
755
756 $ok = 0;
757
758 LABEL32: for(my $first_time = 1; 1;) {
759 if (!$first_time) {
760 $ok = 1;
761 last TEST32;
762 }
763 $ok = 0;
764 $first_time=0;
765
766 redo LABEL32;
767 last TEST32;
768 }
769 $ok = 0;
770}
de29acd5 771cmp_ok($ok,'==',1,'label on for(;;)');
36c66720 772
de29acd5 773TEST33: {
36c66720
RH
774
775 $ok = 0;
776
777 LABEL33: for(my $first_time = 1; 1; $first_time=0) {
778 if (!$first_time) {
779 $ok = 1;
780 last TEST33;
781 }
782 $ok = 0;
783 next LABEL33;
784 last TEST33;
785 }
786 $ok = 0;
787}
de29acd5 788cmp_ok($ok,'==',1,'label on for(;;) successful next');
36c66720 789
de29acd5 790TEST34: {
36c66720
RH
791
792 $ok = 0;
793
794 my $x=1;
795 my $been_in_loop = 0;
796 LABEL34: for(my $first_time = 1; $x--;) {
797 $been_in_loop = 1;
798 if (!$first_time) {
799 $ok = 0;
800 last TEST34;
801 }
802 $ok = 0;
803 $first_time = 0;
804 next LABEL34;
805 last TEST34;
806 }
807 $ok = $been_in_loop;
808}
de29acd5 809cmp_ok($ok,'==',1,'label on for(;;) unsuccessful next');
36c66720 810
de29acd5 811TEST35: {
36c66720
RH
812
813 $ok = 0;
814
815 LABEL35: for(my $first_time = 1; 1; last TEST16) {
816 if (!$first_time) {
817 $ok = 0;
818 last TEST35;
819 }
820 $ok = 0;
821 $first_time = 0;
822 last LABEL35;
823 last TEST35;
824 }
825 $ok = 1;
826}
de29acd5 827cmp_ok($ok,'==',1,'label on for(;;) last');
36c66720 828
de29acd5 829TEST36: {
36c66720
RH
830
831 $ok = 0;
832 my $first_time = 1;
833
834 LABEL36: {
835 if (!$first_time) {
836 $ok = 1;
837 last TEST36;
838 }
839 $ok = 0;
840 $first_time=0;
841
842 redo LABEL36;
843 last TEST36;
844 }
845 continue {
846 $ok = 0;
847 last TEST36;
848 }
849 $ok = 0;
850}
de29acd5 851cmp_ok($ok,'==',1,'label on bare block');
36c66720 852
de29acd5 853TEST37: {
36c66720
RH
854
855 $ok = 0;
856 LABEL37: {
857 next LABEL37;
858 last TEST37;
859 }
860 continue {
861 $ok = 1;
862 last TEST37;
863 }
864 $ok = 0;
865}
de29acd5 866cmp_ok($ok,'==',1,'label on bare block next');
36c66720 867
de29acd5 868TEST38: {
36c66720
RH
869
870 $ok = 0;
871 LABEL38: {
872 last LABEL38;
873 last TEST38;
874 }
875 continue {
876 $ok = 0;
877 last TEST38;
878 }
879 $ok = 1;
880}
de29acd5 881cmp_ok($ok,'==',1,'label on bare block last');
36c66720
RH
882
883TEST39: {
884 $ok = 0;
885 my ($x, $y, $z) = (1,1,1);
886 one39: while ($x--) {
887 $ok = 0;
888 two39: while ($y--) {
889 $ok = 0;
890 three39: while ($z--) {
891 next two39;
892 }
893 continue {
894 $ok = 0;
895 last TEST39;
896 }
897 }
898 continue {
899 $ok = 1;
900 last TEST39;
901 }
902 $ok = 0;
903 }
904}
de29acd5 905cmp_ok($ok,'==',1,'nested constructs');
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906
907sub test_last_label { last TEST40 }
908
909TEST40: {
910 $ok = 1;
911 test_last_label();
912 $ok = 0;
913}
de29acd5 914cmp_ok($ok,'==',1,'dynamically scoped label');
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915
916sub test_last { last }
917
918TEST41: {
919 $ok = 1;
920 test_last();
921 $ok = 0;
922}
de29acd5 923cmp_ok($ok,'==',1,'dynamically scoped');
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924
925
926# [perl #27206] Memory leak in continue loop
927# Ensure that the temporary object is freed each time round the loop,
928# rather then all 10 of them all being freed right at the end
929
930{
931 my $n=10; my $late_free = 0;
932 sub X::DESTROY { $late_free++ if $n < 0 };
933 {
934 ($n-- && bless {}, 'X') && redo;
935 }
de29acd5 936 cmp_ok($late_free,'==',0,"bug 27206: redo memory leak");
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937
938 $n = 10; $late_free = 0;
939 {
940 ($n-- && bless {}, 'X') && redo;
941 }
942 continue { }
de29acd5 943 cmp_ok($late_free,'==',0,"bug 27206: redo with continue memory leak");
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944}
945
de29acd5 946# ensure that redo doesn't clear a lexical declared in the condition
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947
948{
949 my $i = 1;
950 while (my $x = $i) {
951 $i++;
952 redo if $i == 2;
de29acd5 953 cmp_ok($x,'==',1,"while/redo lexical life");
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954 last;
955 }
956 $i = 1;
957 until (! (my $x = $i)) {
958 $i++;
959 redo if $i == 2;
de29acd5 960 cmp_ok($x,'==',1,"until/redo lexical life");
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961 last;
962 }
963 for ($i = 1; my $x = $i; ) {
964 $i++;
965 redo if $i == 2;
de29acd5 966 cmp_ok($x,'==',1,"for/redo lexical life");
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967 last;
968 }
969
970}
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971
972{
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973 $a37725[3] = 1; # use package var
974 $i = 2;
975 for my $x (reverse @a37725) {
976 $x = $i++;
977 }
de29acd5 978 cmp_ok("@a37725",'eq',"5 4 3 2",'bug 27725: reverse with empty slots bug');
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979}
980