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4f890a3067e1198f missed qr// from t/re/pat.t in its refactoring in two places.
[perl5.git] / t / re / pat.t
CommitLineData
8d063cd8 1#!./perl
8d37f932
DD
2#
3# This is a home for regular expression tests that don't fit into
67a2b8c6 4# the format supported by re/regexp.t. If you want to add a test
ff3f963a
KW
5# that does fit that format, add it to re/re_tests, not here. Tests for \N
6# should be added here because they are treated as single quoted strings
7# there, which means they avoid the lexer which otherwise would look at them.
8d063cd8 8
84281c31
A
9use strict;
10use warnings;
11use 5.010;
12
84281c31
A
13sub run_tests;
14
9133bbab 15$| = 1;
3568d838 16
8d37f932 17
e4d48cc9
GS
18BEGIN {
19 chdir 't' if -d 't';
9d45b377 20 @INC = ('../lib','.');
6f4e0180 21 require './test.pl';
e4d48cc9 22}
84281c31 23
5c0a530f 24plan tests => 449; # Update this when adding/deleting tests.
b7a35066 25
9d45b377 26run_tests() unless caller;
b7a35066 27
84281c31
A
28#
29# Tests start here.
30#
31sub run_tests {
0ef3e39e 32
84281c31 33 {
84281c31 34 my $x = "abc\ndef\n";
5895685f 35 (my $x_pretty = $x) =~ s/\n/\\n/g;
fd291da9 36
5895685f
NC
37 ok $x =~ /^abc/, qq ["$x_pretty" =~ /^abc/];
38 ok $x !~ /^def/, qq ["$x_pretty" !~ /^def/];
fd291da9 39
84281c31 40 # used to be a test for $*
5895685f 41 ok $x =~ /^def/m, qq ["$x_pretty" =~ /^def/m];
fd291da9 42
b33825c4
NC
43 ok(!($x =~ /^xxx/), qq ["$x_pretty" =~ /^xxx/]);
44 ok(!($x !~ /^abc/), qq ["$x_pretty" !~ /^abc/]);
fd291da9 45
5895685f 46 ok $x =~ /def/, qq ["$x_pretty" =~ /def/];
b33825c4 47 ok(!($x !~ /def/), qq ["$x_pretty" !~ /def/]);
4765795a 48
5895685f 49 ok $x !~ /.def/, qq ["$x_pretty" !~ /.def/];
b33825c4 50 ok(!($x =~ /.def/), qq ["$x_pretty" =~ /.def/]);
4765795a 51
5895685f 52 ok $x =~ /\ndef/, qq ["$x_pretty" =~ /\\ndef/];
b33825c4 53 ok(!($x !~ /\ndef/), qq ["$x_pretty" !~ /\\ndef/]);
84281c31 54 }
4765795a 55
84281c31
A
56 {
57 $_ = '123';
58 ok /^([0-9][0-9]*)/, qq [\$_ = '$_'; /^([0-9][0-9]*)/];
59 }
f9969324 60
84281c31
A
61 {
62 $_ = 'aaabbbccc';
63 ok /(a*b*)(c*)/ && $1 eq 'aaabbb' && $2 eq 'ccc',
64 qq [\$_ = '$_'; /(a*b*)(c*)/];
65 ok /(a+b+c+)/ && $1 eq 'aaabbbccc', qq [\$_ = '$_'; /(a+b+c+)/];
b33825c4 66 unlike($_, qr/a+b?c+/, qq [\$_ = '$_'; /a+b?c+/]);
84281c31
A
67
68 $_ = 'aaabccc';
69 ok /a+b?c+/, qq [\$_ = '$_'; /a+b?c+/];
70 ok /a*b?c*/, qq [\$_ = '$_'; /a*b?c*/];
71
72 $_ = 'aaaccc';
73 ok /a*b?c*/, qq [\$_ = '$_'; /a*b?c*/];
b33825c4 74 unlike($_, qr/a*b+c*/, qq [\$_ = '$_'; /a*b+c*/]);
84281c31
A
75
76 $_ = 'abcdef';
77 ok /bcd|xyz/, qq [\$_ = '$_'; /bcd|xyz/];
78 ok /xyz|bcd/, qq [\$_ = '$_'; /xyz|bcd/];
79 ok m|bc/*d|, qq [\$_ = '$_'; m|bc/*d|];
80 ok /^$_$/, qq [\$_ = '$_'; /^\$_\$/];
4765795a 81 }
4765795a 82
84281c31
A
83 {
84 # used to be a test for $*
5895685f 85 ok "ab\ncd\n" =~ /^cd/m, q ["ab\ncd\n" =~ /^cd/m];
84281c31 86 }
4765795a 87
84281c31
A
88 {
89 our %XXX = map {($_ => $_)} 123, 234, 345;
90
91 our @XXX = ('ok 1','not ok 1', 'ok 2','not ok 2','not ok 3');
92 while ($_ = shift(@XXX)) {
b33825c4 93 my $e = index ($_, 'not') >= 0 ? '' : 1;
725a61d7 94 my $r = m?(.*)?;
b33825c4 95 is($r, $e, "?(.*)?");
84281c31
A
96 /not/ && reset;
97 if (/not ok 2/) {
98 if ($^O eq 'VMS') {
99 $_ = shift(@XXX);
100 }
101 else {
102 reset 'X';
103 }
104 }
105 }
4765795a 106
84281c31
A
107 SKIP: {
108 if ($^O eq 'VMS') {
109 skip "Reset 'X'", 1;
110 }
111 ok !keys %XXX, "%XXX is empty";
112 }
4765795a 113
84281c31 114 }
4765795a 115
84281c31 116 {
4f890a30 117 my $message = "Test empty pattern";
84281c31
A
118 my $xyz = 'xyz';
119 my $cde = 'cde';
120
121 $cde =~ /[^ab]*/;
122 $xyz =~ //;
4f890a30 123 is($&, $xyz, $message);
84281c31
A
124
125 my $foo = '[^ab]*';
126 $cde =~ /$foo/;
127 $xyz =~ //;
4f890a30 128 is($&, $xyz, $message);
84281c31
A
129
130 $cde =~ /$foo/;
131 my $null;
132 no warnings 'uninitialized';
133 $xyz =~ /$null/;
4f890a30 134 is($&, $xyz, $message);
84281c31
A
135
136 $null = "";
137 $xyz =~ /$null/;
4f890a30 138 is($&, $xyz, $message);
84281c31 139 }
4765795a 140
84281c31 141 {
4f890a30 142 my $message = q !Check $`, $&, $'!;
84281c31 143 $_ = 'abcdefghi';
0f289c68 144 /def/; # optimized up to cmd
4f890a30 145 is("$`:$&:$'", 'abc:def:ghi', $message);
4765795a 146
84281c31 147 no warnings 'void';
0f289c68 148 /cde/ + 0; # optimized only to spat
4f890a30 149 is("$`:$&:$'", 'ab:cde:fghi', $message);
4765795a 150
0f289c68 151 /[d][e][f]/; # not optimized
4f890a30 152 is("$`:$&:$'", 'abc:def:ghi', $message);
84281c31 153 }
4765795a 154
84281c31
A
155 {
156 $_ = 'now is the {time for all} good men to come to.';
157 / {([^}]*)}/;
de26e0cc 158 is($1, 'time for all', "Match braces");
84281c31 159 }
4765795a 160
84281c31 161 {
4f890a30 162 my $message = "{N,M} quantifier";
84281c31 163 $_ = 'xxx {3,4} yyy zzz';
4f890a30
NC
164 ok(/( {3,4})/, $message);
165 is($1, ' ', $message);
166 unlike($_, qr/( {4,})/, $message);
167 ok(/( {2,3}.)/, $message);
168 is($1, ' y', $message);
169 ok(/(y{2,3}.)/, $message);
170 is($1, 'yyy ', $message);
171 unlike($_, qr/x {3,4}/, $message);
172 unlike($_, qr/^xxx {3,4}/, $message);
84281c31 173 }
4765795a 174
84281c31 175 {
4f890a30 176 my $message = "Test /g";
84281c31
A
177 local $" = ":";
178 $_ = "now is the time for all good men to come to.";
179 my @words = /(\w+)/g;
180 my $exp = "now:is:the:time:for:all:good:men:to:come:to";
4765795a 181
4f890a30 182 is("@words", $exp, $message);
4765795a 183
84281c31
A
184 @words = ();
185 while (/\w+/g) {
186 push (@words, $&);
187 }
4f890a30 188 is("@words", $exp, $message);
4765795a 189
84281c31
A
190 @words = ();
191 pos = 0;
192 while (/to/g) {
193 push(@words, $&);
194 }
4f890a30 195 is("@words", "to:to", $message);
4765795a 196
84281c31
A
197 pos $_ = 0;
198 @words = /to/g;
4f890a30 199 is("@words", "to:to", $message);
84281c31 200 }
4765795a 201
84281c31
A
202 {
203 $_ = "abcdefghi";
204
205 my $pat1 = 'def';
206 my $pat2 = '^def';
207 my $pat3 = '.def.';
208 my $pat4 = 'abc';
209 my $pat5 = '^abc';
210 my $pat6 = 'abc$';
211 my $pat7 = 'ghi';
212 my $pat8 = '\w*ghi';
213 my $pat9 = 'ghi$';
214
215 my $t1 = my $t2 = my $t3 = my $t4 = my $t5 =
216 my $t6 = my $t7 = my $t8 = my $t9 = 0;
217
218 for my $iter (1 .. 5) {
219 $t1++ if /$pat1/o;
220 $t2++ if /$pat2/o;
221 $t3++ if /$pat3/o;
222 $t4++ if /$pat4/o;
223 $t5++ if /$pat5/o;
224 $t6++ if /$pat6/o;
225 $t7++ if /$pat7/o;
226 $t8++ if /$pat8/o;
227 $t9++ if /$pat9/o;
228 }
229 my $x = "$t1$t2$t3$t4$t5$t6$t7$t8$t9";
de26e0cc 230 is($x, '505550555', "Test /o");
84281c31 231 }
4765795a 232
4f890a30 233 {
84281c31
A
234 my $xyz = 'xyz';
235 ok "abc" =~ /^abc$|$xyz/, "| after \$";
4765795a 236
84281c31 237 # perl 4.009 says "unmatched ()"
4f890a30 238 my $message = '$ inside ()';
4765795a 239
84281c31
A
240 my $result;
241 eval '"abc" =~ /a(bc$)|$xyz/; $result = "$&:$1"';
4f890a30
NC
242 is($@, "", $message);
243 is($result, "abc:bc", $message);
84281c31 244 }
4765795a 245
84281c31 246 {
4f890a30 247 my $message = "Scalar /g";
84281c31
A
248 $_ = "abcfooabcbar";
249
4f890a30
NC
250 ok( /abc/g && $` eq "", $message);
251 ok( /abc/g && $` eq "abcfoo", $message);
252 ok(!/abc/g, $message);
84281c31 253
4f890a30 254 $message = "Scalar /gi";
84281c31 255 pos = 0;
4f890a30
NC
256 ok( /ABC/gi && $` eq "", $message);
257 ok( /ABC/gi && $` eq "abcfoo", $message);
258 ok(!/ABC/gi, $message);
84281c31 259
4f890a30 260 $message = "Scalar /g";
84281c31 261 pos = 0;
4f890a30
NC
262 ok( /abc/g && $' eq "fooabcbar", $message);
263 ok( /abc/g && $' eq "bar", $message);
84281c31
A
264
265 $_ .= '';
266 my @x = /abc/g;
de26e0cc 267 is(@x, 2, "/g reset after assignment");
4765795a 268 }
4765795a 269
84281c31 270 {
4f890a30 271 my $message = '/g, \G and pos';
84281c31
A
272 $_ = "abdc";
273 pos $_ = 2;
274 /\Gc/gc;
4f890a30 275 is(pos $_, 2, $message);
84281c31 276 /\Gc/g;
4f890a30 277 is(pos $_, undef, $message);
84281c31 278 }
4765795a 279
84281c31 280 {
4f890a30 281 my $message = '(?{ })';
84281c31
A
282 our $out = 1;
283 'abc' =~ m'a(?{ $out = 2 })b';
4f890a30 284 is($out, 2, $message);
84281c31
A
285
286 $out = 1;
287 'abc' =~ m'a(?{ $out = 3 })c';
4f890a30 288 is($out, 1, $message);
84281c31 289 }
4765795a 290
84281c31
A
291 {
292 $_ = 'foobar1 bar2 foobar3 barfoobar5 foobar6';
293 my @out = /(?<!foo)bar./g;
de26e0cc 294 is("@out", 'bar2 barf', "Negative lookbehind");
84281c31 295 }
4765795a 296
84281c31 297 {
4f890a30 298 my $message = "REG_INFTY tests";
84281c31 299 # Tests which depend on REG_INFTY
19d6612d
NC
300
301 # Defaults assumed if this fails
302 eval { require Config; };
303 $::reg_infty = $Config::Config{reg_infty} // 32767;
84281c31
A
304 $::reg_infty_m = $::reg_infty - 1;
305 $::reg_infty_p = $::reg_infty + 1;
93f09d7b 306 $::reg_infty_m = $::reg_infty_m; # Suppress warning.
84281c31
A
307
308 # As well as failing if the pattern matches do unexpected things, the
309 # next three tests will fail if you should have picked up a lower-than-
310 # default value for $reg_infty from Config.pm, but have not.
311
14358a41
NC
312 is(eval q{('aaa' =~ /(a{1,$::reg_infty_m})/)[0]}, 'aaa', $message);
313 is($@, '', $message);
314 is(eval q{('a' x $::reg_infty_m) =~ /a{$::reg_infty_m}/}, 1, $message);
315 is($@, '', $message);
316 isnt(q{('a' x ($::reg_infty_m - 1)) !~ /a{$::reg_infty_m}/}, 1, $message);
317 is($@, '', $message);
318
84281c31 319 eval "'aaa' =~ /a{1,$::reg_infty}/";
224b2e7e 320 like($@, qr/^\QQuantifier in {,} bigger than/, $message);
84281c31 321 eval "'aaa' =~ /a{1,$::reg_infty_p}/";
4f890a30 322 like($@, qr/^\QQuantifier in {,} bigger than/, $message);
4765795a 323 }
8269fa76 324
84281c31
A
325 {
326 # Poke a couple more parse failures
327 my $context = 'x' x 256;
328 eval qq("${context}y" =~ /(?<=$context)y/);
329 ok $@ =~ /^\QLookbehind longer than 255 not/, "Lookbehind limit";
330 }
8269fa76 331
84281c31
A
332 {
333 # Long Monsters
84281c31
A
334 for my $l (125, 140, 250, 270, 300000, 30) { # Ordered to free memory
335 my $a = 'a' x $l;
4f890a30
NC
336 my $message = "Long monster, length = $l";
337 like("ba$a=", qr/a$a=/, $message);
338 unlike("b$a=", qr/a$a=/, $message);
339 like("b$a=", qr/ba+=/, $message);
84281c31 340
224b2e7e 341 like("ba$a=", qr/b(?:a|b)+=/, $message);
84281c31
A
342 }
343 }
8269fa76 344
84281c31
A
345 {
346 # 20000 nodes, each taking 3 words per string, and 1 per branch
347 my $long_constant_len = join '|', 12120 .. 32645;
348 my $long_var_len = join '|', 8120 .. 28645;
349 my %ans = ( 'ax13876y25677lbc' => 1,
350 'ax13876y25677mcb' => 0, # not b.
351 'ax13876y35677nbc' => 0, # Num too big
352 'ax13876y25677y21378obc' => 1,
0f289c68 353 'ax13876y25677y21378zbc' => 0, # Not followed by [k-o]
84281c31
A
354 'ax13876y25677y21378y21378kbc' => 1,
355 'ax13876y25677y21378y21378kcb' => 0, # Not b.
356 'ax13876y25677y21378y21378y21378kbc' => 0, # 5 runs
357 );
358
84281c31 359 for (keys %ans) {
4f890a30
NC
360 my $message = "20000 nodes, const-len '$_'";
361 ok !($ans{$_} xor /a(?=([yx]($long_constant_len)){2,4}[k-o]).*b./o), $message;
84281c31 362
4f890a30
NC
363 $message = "20000 nodes, var-len '$_'";
364 ok !($ans{$_} xor /a(?=([yx]($long_var_len)){2,4}[k-o]).*b./o,), $message;
84281c31 365 }
b8ef571c 366 }
209a9bc1 367
84281c31 368 {
4f890a30 369 my $message = "Complicated backtracking";
84281c31
A
370 $_ = " a (bla()) and x(y b((l)u((e))) and b(l(e)e)e";
371 my $expect = "(bla()) ((l)u((e))) (l(e)e)";
372
373 use vars '$c';
374 sub matchit {
375 m/
376 (
377 \(
0f289c68 378 (?{ $c = 1 }) # Initialize
84281c31
A
379 (?:
380 (?(?{ $c == 0 }) # PREVIOUS iteration was OK, stop the loop
381 (?!
0f289c68
YO
382 ) # Fail: will unwind one iteration back
383 )
84281c31 384 (?:
0f289c68 385 [^()]+ # Match a big chunk
84281c31
A
386 (?=
387 [()]
0f289c68 388 ) # Do not try to match subchunks
84281c31
A
389 |
390 \(
391 (?{ ++$c })
392 |
393 \)
394 (?{ --$c })
395 )
0f289c68 396 )+ # This may not match with different subblocks
84281c31
A
397 )
398 (?(?{ $c != 0 })
399 (?!
0f289c68
YO
400 ) # Fail
401 ) # Otherwise the chunk 1 may succeed with $c>0
84281c31
A
402 /xg;
403 }
3568d838 404
84281c31
A
405 my @ans = ();
406 my $res;
407 push @ans, $res while $res = matchit;
4f890a30 408 is("@ans", "1 1 1", $message);
3568d838 409
84281c31 410 @ans = matchit;
4f890a30 411 is("@ans", $expect, $message);
3568d838 412
4f890a30 413 $message = "Recursion with (??{ })";
84281c31
A
414 our $matched;
415 $matched = qr/\((?:(?>[^()]+)|(??{$matched}))*\)/;
3568d838 416
84281c31
A
417 @ans = my @ans1 = ();
418 push (@ans, $res), push (@ans1, $&) while $res = m/$matched/g;
3568d838 419
4f890a30
NC
420 is("@ans", "1 1 1", $message);
421 is("@ans1", $expect, $message);
3568d838 422
84281c31 423 @ans = m/$matched/g;
4f890a30 424 is("@ans", $expect, $message);
3568d838 425
84281c31 426 }
3568d838 427
84281c31
A
428 {
429 ok "abc" =~ /^(??{"a"})b/, '"abc" =~ /^(??{"a"})b/';
430 }
3568d838 431
84281c31 432 {
0f289c68 433 my @ans = ('a/b' =~ m%(.*/)?(.*)%); # Stack may be bad
de26e0cc 434 is("@ans", 'a/ b', "Stack may be bad");
84281c31 435 }
3568d838 436
84281c31 437 {
4f890a30 438 my $message = "Eval-group not allowed at runtime";
84281c31
A
439 my $code = '{$blah = 45}';
440 our $blah = 12;
441 eval { /(?$code)/ };
4f890a30 442 ok($@ && $@ =~ /not allowed at runtime/ && $blah == 12, $message);
84281c31 443
3044771b
NC
444 $blah = 12;
445 my $res = eval { "xx" =~ /(?$code)/o };
446 {
447 no warnings 'uninitialized';
5895685f 448 chomp $@; my $message = "$message '$@', '$res', '$blah'";
4f890a30 449 ok($@ && $@ =~ /not allowed at runtime/ && $blah == 12, $message);
3044771b
NC
450 }
451
452 $code = '=xx';
453 $blah = 12;
454 $res = eval { "xx" =~ /(?$code)/o };
455 {
456 no warnings 'uninitialized';
4f890a30
NC
457 my $message = "$message '$@', '$res', '$blah'";
458 ok(!$@ && $res, $message);
3044771b 459 }
3568d838 460
84281c31
A
461 $code = '{$blah = 45}';
462 $blah = 12;
463 eval "/(?$code)/";
4f890a30 464 is($blah, 45, $message);
3568d838 465
84281c31
A
466 $blah = 12;
467 /(?{$blah = 45})/;
4f890a30 468 is($blah, 45, $message);
84281c31 469 }
3568d838 470
84281c31 471 {
4f890a30 472 my $message = "Pos checks";
84281c31
A
473 my $x = 'banana';
474 $x =~ /.a/g;
4f890a30 475 is(pos $x, 2, $message);
3568d838 476
84281c31 477 $x =~ /.z/gc;
4f890a30 478 is(pos $x, 2, $message);
3568d838 479
84281c31
A
480 sub f {
481 my $p = $_[0];
482 return $p;
483 }
3568d838 484
84281c31 485 $x =~ /.a/g;
4f890a30 486 is(f (pos $x), 4, $message);
84281c31 487 }
3568d838 488
84281c31 489 {
4f890a30 490 my $message = 'Checking $^R';
84281c31
A
491 our $x = $^R = 67;
492 'foot' =~ /foo(?{$x = 12; 75})[t]/;
4f890a30 493 is($^R, 75, $message);
84281c31
A
494
495 $x = $^R = 67;
496 'foot' =~ /foo(?{$x = 12; 75})[xy]/;
4f890a30 497 ok($^R eq '67' && $x eq '12', $message);
84281c31
A
498
499 $x = $^R = 67;
500 'foot' =~ /foo(?{ $^R + 12 })((?{ $x = 12; $^R + 17 })[xy])?/;
4f890a30 501 ok($^R eq '79' && $x eq '12', $message);
84281c31 502 }
3568d838 503
84281c31 504 {
de26e0cc
NC
505 is(qr/\b\v$/i, '(?^i:\b\v$)', 'qr/\b\v$/i');
506 is(qr/\b\v$/s, '(?^s:\b\v$)', 'qr/\b\v$/s');
507 is(qr/\b\v$/m, '(?^m:\b\v$)', 'qr/\b\v$/m');
508 is(qr/\b\v$/x, '(?^x:\b\v$)', 'qr/\b\v$/x');
509 is(qr/\b\v$/xism, '(?^msix:\b\v$)', 'qr/\b\v$/xism');
510 is(qr/\b\v$/, '(?^:\b\v$)', 'qr/\b\v$/');
84281c31 511 }
3568d838 512
9de15fec 513 { # Test that charset modifier work, and are interpolated
de26e0cc
NC
514 is(qr/\b\v$/, '(?^:\b\v$)', 'Verify no locale, no unicode_strings gives default modifier');
515 is(qr/(?l:\b\v$)/, '(?^:(?l:\b\v$))', 'Verify infix l modifier compiles');
516 is(qr/(?u:\b\v$)/, '(?^:(?u:\b\v$))', 'Verify infix u modifier compiles');
517 is(qr/(?l)\b\v$/, '(?^:(?l)\b\v$)', 'Verify (?l) compiles');
518 is(qr/(?u)\b\v$/, '(?^:(?u)\b\v$)', 'Verify (?u) compiles');
9de15fec
KW
519
520 my $dual = qr/\b\v$/;
521 use locale;
522 my $locale = qr/\b\v$/;
de26e0cc 523 is($locale, '(?^l:\b\v$)', 'Verify has l modifier when compiled under use locale');
9de15fec
KW
524 no locale;
525
526 use feature 'unicode_strings';
527 my $unicode = qr/\b\v$/;
de26e0cc
NC
528 is($unicode, '(?^u:\b\v$)', 'Verify has u modifier when compiled under unicode_strings');
529 is(qr/abc$dual/, '(?^u:abc(?^:\b\v$))', 'Verify retains d meaning when interpolated under locale');
530 is(qr/abc$locale/, '(?^u:abc(?^l:\b\v$))', 'Verify retains l when interpolated under unicode_strings');
9de15fec
KW
531
532 no feature 'unicode_strings';
de26e0cc
NC
533 is(qr/abc$locale/, '(?^:abc(?^l:\b\v$))', 'Verify retains l when interpolated outside locale and unicode strings');
534 is(qr/def$unicode/, '(?^:def(?^u:\b\v$))', 'Verify retains u when interpolated outside locale and unicode strings');
9de15fec
KW
535
536 use locale;
de26e0cc
NC
537 is(qr/abc$dual/, '(?^l:abc(?^:\b\v$))', 'Verify retains d meaning when interpolated under locale');
538 is(qr/abc$unicode/, '(?^l:abc(?^u:\b\v$))', 'Verify retains u when interpolated under locale');
9de15fec
KW
539 }
540
84281c31 541 {
4f890a30 542 my $message = "Look around";
84281c31 543 $_ = 'xabcx';
84281c31 544 foreach my $ans ('', 'c') {
4f890a30
NC
545 ok(/(?<=(?=a)..)((?=c)|.)/g, $message);
546 is($1, $ans, $message);
84281c31
A
547 }
548 }
3568d838 549
84281c31 550 {
4f890a30 551 my $message = "Empty clause";
84281c31
A
552 $_ = 'a';
553 foreach my $ans ('', 'a', '') {
4f890a30
NC
554 ok(/^|a|$/g, $message);
555 is($&, $ans, $message);
84281c31
A
556 }
557 }
3568d838 558
84281c31 559 {
84281c31 560 sub prefixify {
4f890a30
NC
561 my $message = "Prefixify";
562 {
84281c31 563 my ($v, $a, $b, $res) = @_;
4f890a30
NC
564 ok($v =~ s/\Q$a\E/$b/, $message);
565 is($v, $res, $message);
84281c31
A
566 }
567 }
3568d838 568
84281c31
A
569 prefixify ('/a/b/lib/arch', "/a/b/lib", 'X/lib', 'X/lib/arch');
570 prefixify ('/a/b/man/arch', "/a/b/man", 'X/man', 'X/man/arch');
571 }
3568d838 572
84281c31
A
573 {
574 $_ = 'var="foo"';
575 /(\")/;
576 ok $1 && /$1/, "Capture a quote";
577 }
3568d838 578
84281c31 579 {
84281c31 580 no warnings 'closure';
4f890a30 581 my $message = '(?{ $var } refers to package vars';
84281c31
A
582 package aa;
583 our $c = 2;
584 $::c = 3;
585 '' =~ /(?{ $c = 4 })/;
4f890a30
NC
586 main::is($c, 4, $message);
587 main::is($::c, 3, $message);
84281c31 588 }
3568d838 589
84281c31 590 {
cb124425
NC
591 is(eval 'q(a:[b]:) =~ /[x[:foo:]]/', undef);
592 like ($@, qr/POSIX class \[:[^:]+:\] unknown in regex/,
593 'POSIX class [: :] must have valid name');
84281c31
A
594
595 for my $d (qw [= .]) {
cb124425
NC
596 is(eval "/[[${d}foo${d}]]/", undef);
597 like ($@, qr/\QPOSIX syntax [$d $d] is reserved for future extensions/,
598 "POSIX syntax [[$d $d]] is an error");
84281c31
A
599 }
600 }
3568d838 601
84281c31
A
602 {
603 # test if failure of patterns returns empty list
4f890a30 604 my $message = "Failed pattern returns empty list";
84281c31
A
605 $_ = 'aaa';
606 @_ = /bbb/;
4f890a30 607 is("@_", "", $message);
3568d838 608
84281c31 609 @_ = /bbb/g;
4f890a30 610 is("@_", "", $message);
a72deede 611
84281c31 612 @_ = /(bbb)/;
4f890a30 613 is("@_", "", $message);
a72deede 614
84281c31 615 @_ = /(bbb)/g;
4f890a30 616 is("@_", "", $message);
84281c31 617 }
a72deede 618
84281c31 619 {
4f890a30 620 my $message = '@- and @+ tests';
84281c31
A
621
622 /a(?=.$)/;
4f890a30
NC
623 is($#+, 0, $message);
624 is($#-, 0, $message);
625 is($+ [0], 2, $message);
626 is($- [0], 1, $message);
627 ok(!defined $+ [1] && !defined $- [1] &&
628 !defined $+ [2] && !defined $- [2], $message);
84281c31
A
629
630 /a(a)(a)/;
4f890a30
NC
631 is($#+, 2, $message);
632 is($#-, 2, $message);
633 is($+ [0], 3, $message);
634 is($- [0], 0, $message);
635 is($+ [1], 2, $message);
636 is($- [1], 1, $message);
637 is($+ [2], 3, $message);
638 is($- [2], 2, $message);
639 ok(!defined $+ [3] && !defined $- [3] &&
640 !defined $+ [4] && !defined $- [4], $message);
84281c31 641
54a4274e 642 # Exists has a special check for @-/@+ - bug 45147
4f890a30
NC
643 ok(exists $-[0], $message);
644 ok(exists $+[0], $message);
645 ok(exists $-[2], $message);
646 ok(exists $+[2], $message);
647 ok(!exists $-[3], $message);
648 ok(!exists $+[3], $message);
649 ok(exists $-[-1], $message);
650 ok(exists $+[-1], $message);
651 ok(exists $-[-3], $message);
652 ok(exists $+[-3], $message);
653 ok(!exists $-[-4], $message);
654 ok(!exists $+[-4], $message);
84281c31
A
655
656 /.(a)(b)?(a)/;
4f890a30
NC
657 is($#+, 3, $message);
658 is($#-, 3, $message);
659 is($+ [1], 2, $message);
660 is($- [1], 1, $message);
661 is($+ [3], 3, $message);
662 is($- [3], 2, $message);
663 ok(!defined $+ [2] && !defined $- [2] &&
664 !defined $+ [4] && !defined $- [4], $message);
84281c31 665
84281c31 666 /.(a)/;
4f890a30
NC
667 is($#+, 1, $message);
668 is($#-, 1, $message);
669 is($+ [0], 2, $message);
670 is($- [0], 0, $message);
671 is($+ [1], 2, $message);
672 is($- [1], 1, $message);
673 ok(!defined $+ [2] && !defined $- [2] &&
674 !defined $+ [3] && !defined $- [3], $message);
84281c31
A
675
676 /.(a)(ba*)?/;
4f890a30
NC
677 is($#+, 2, $message);
678 is($#-, 1, $message);
84281c31 679 }
a72deede 680
88743d87 681 foreach ('$+[0] = 13', '$-[0] = 13', '@+ = (7, 6, 5)', '@- = qw (foo bar)') {
cb124425
NC
682 is(eval $_, undef);
683 like($@, qr/^Modification of a read-only value attempted/,
684 'Elements of @- and @+ are read-only');
84281c31 685 }
a72deede 686
84281c31 687 {
4f890a30 688 my $message = '\G testing';
84281c31
A
689 $_ = 'aaa';
690 pos = 1;
691 my @a = /\Ga/g;
4f890a30 692 is("@a", "a a", $message);
84281c31
A
693
694 my $str = 'abcde';
695 pos $str = 2;
4f890a30
NC
696 unlike($str, qr/^\G/, $message);
697 unlike($str, qr/^.\G/, $message);
698 like($str, qr/^..\G/, $message);
699 unlike($str, qr/^...\G/, $message);
700 ok($str =~ /\G../ && $& eq 'cd', $message);
84281c31 701
04934b6d 702 local $::TODO = $::running_as_thread;
4f890a30 703 ok($str =~ /.\G./ && $& eq 'bc', $message);
84281c31 704 }
a72deede 705
84281c31 706 {
4f890a30 707 my $message = 'pos inside (?{ })';
84281c31
A
708 my $str = 'abcde';
709 our ($foo, $bar);
4f890a30
NC
710 like($str, qr/b(?{$foo = $_; $bar = pos})c/, $message);
711 is($foo, $str, $message);
712 is($bar, 2, $message);
713 is(pos $str, undef, $message);
84281c31
A
714
715 undef $foo;
716 undef $bar;
717 pos $str = undef;
4f890a30
NC
718 ok($str =~ /b(?{$foo = $_; $bar = pos})c/g, $message);
719 is($foo, $str, $message);
720 is($bar, 2, $message);
721 is(pos $str, 3, $message);
84281c31
A
722
723 $_ = $str;
724 undef $foo;
725 undef $bar;
4f890a30
NC
726 like($_, qr/b(?{$foo = $_; $bar = pos})c/, $message);
727 is($foo, $str, $message);
728 is($bar, 2, $message);
84281c31
A
729
730 undef $foo;
731 undef $bar;
4f890a30
NC
732 ok(/b(?{$foo = $_; $bar = pos})c/g, $message);
733 is($foo, $str, $message);
734 is($bar, 2, $message);
735 is(pos, 3, $message);
84281c31
A
736
737 undef $foo;
738 undef $bar;
739 pos = undef;
740 1 while /b(?{$foo = $_; $bar = pos})c/g;
4f890a30
NC
741 is($foo, $str, $message);
742 is($bar, 2, $message);
743 is(pos, undef, $message);
84281c31
A
744
745 undef $foo;
746 undef $bar;
747 $_ = 'abcde|abcde';
4f890a30
NC
748 ok(s/b(?{$foo = $_; $bar = pos})c/x/g, $message);
749 is($foo, 'abcde|abcde', $message);
750 is($bar, 8, $message);
751 is($_, 'axde|axde', $message);
84281c31
A
752
753 # List context:
754 $_ = 'abcde|abcde';
755 our @res;
756 () = /([ace]).(?{push @res, $1,$2})([ce])(?{push @res, $1,$2})/g;
757 @res = map {defined $_ ? "'$_'" : 'undef'} @res;
4f890a30 758 is("@res", "'a' undef 'a' 'c' 'e' undef 'a' undef 'a' 'c'", $message);
84281c31
A
759
760 @res = ();
761 () = /([ace]).(?{push @res, $`,$&,$'})([ce])(?{push @res, $`,$&,$'})/g;
762 @res = map {defined $_ ? "'$_'" : 'undef'} @res;
4f890a30 763 is("@res", "'' 'ab' 'cde|abcde' " .
84281c31
A
764 "'' 'abc' 'de|abcde' " .
765 "'abcd' 'e|' 'abcde' " .
766 "'abcde|' 'ab' 'cde' " .
4f890a30 767 "'abcde|' 'abc' 'de'", $message);
84281c31 768 }
f33976b4 769
84281c31 770 {
4f890a30 771 my $message = '\G anchor checks';
84281c31
A
772 my $foo = 'aabbccddeeffgg';
773 pos ($foo) = 1;
774 {
04934b6d 775 local $::TODO = $::running_as_thread;
84281c31 776 no warnings 'uninitialized';
4f890a30
NC
777 ok($foo =~ /.\G(..)/g, $message);
778 is($1, 'ab', $message);
cce850e4 779
84281c31 780 pos ($foo) += 1;
4f890a30
NC
781 ok($foo =~ /.\G(..)/g, $message);
782 is($1, 'cc', $message);
cce850e4 783
84281c31 784 pos ($foo) += 1;
4f890a30
NC
785 ok($foo =~ /.\G(..)/g, $message);
786 is($1, 'de', $message);
cce850e4 787
4f890a30 788 ok($foo =~ /\Gef/g, $message);
84281c31 789 }
cce850e4 790
84281c31 791 undef pos $foo;
4f890a30
NC
792 ok($foo =~ /\G(..)/g, $message);
793 is($1, 'aa', $message);
cce850e4 794
4f890a30
NC
795 ok($foo =~ /\G(..)/g, $message);
796 is($1, 'bb', $message);
cce850e4 797
84281c31 798 pos ($foo) = 5;
4f890a30
NC
799 ok($foo =~ /\G(..)/g, $message);
800 is($1, 'cd', $message);
84281c31 801 }
cce850e4 802
84281c31
A
803 {
804 $_ = '123x123';
805 my @res = /(\d*|x)/g;
806 local $" = '|';
de26e0cc 807 is("@res", "123||x|123|", "0 match in alternation");
84281c31 808 }
cce850e4 809
84281c31 810 {
4f890a30 811 my $message = "Match against temporaries (created via pp_helem())" .
84281c31 812 " is safe";
4f890a30
NC
813 ok({foo => "bar\n" . $^X} -> {foo} =~ /^(.*)\n/g, $message);
814 is($1, "bar", $message);
84281c31 815 }
75685a94 816
84281c31 817 {
4f890a30 818 my $message = 'package $i inside (?{ }), ' .
84281c31
A
819 'saved substrings and changing $_';
820 our @a = qw [foo bar];
821 our @b = ();
822 s/(\w)(?{push @b, $1})/,$1,/g for @a;
4f890a30
NC
823 is("@b", "f o o b a r", $message);
824 is("@a", ",f,,o,,o, ,b,,a,,r,", $message);
84281c31 825
4f890a30 826 $message = 'lexical $i inside (?{ }), ' .
84281c31
A
827 'saved substrings and changing $_';
828 no warnings 'closure';
829 my @c = qw [foo bar];
830 my @d = ();
831 s/(\w)(?{push @d, $1})/,$1,/g for @c;
4f890a30
NC
832 is("@d", "f o o b a r", $message);
833 is("@c", ",f,,o,,o, ,b,,a,,r,", $message);
d9f424b2
JH
834 }
835
84281c31 836 {
4f890a30 837 my $message = 'Brackets';
84281c31
A
838 our $brackets;
839 $brackets = qr {
840 { (?> [^{}]+ | (??{ $brackets }) )* }
841 }x;
842
4f890a30
NC
843 ok("{{}" =~ $brackets, $message);
844 is($&, "{}", $message);
845 ok("something { long { and } hairy" =~ $brackets, $message);
846 is($&, "{ and }", $message);
847 ok("something { long { and } hairy" =~ m/((??{ $brackets }))/, $message);
848 is($&, "{ and }", $message);
84281c31 849 }
a4c04bdc 850
84281c31
A
851 {
852 $_ = "a-a\nxbb";
853 pos = 1;
b33825c4 854 ok(!m/^-.*bb/mg, '$_ = "a-a\nxbb"; m/^-.*bb/mg');
84281c31 855 }
a4c04bdc 856
84281c31 857 {
4f890a30 858 my $message = '\G anchor checks';
84281c31
A
859 my $text = "aaXbXcc";
860 pos ($text) = 0;
4f890a30 861 ok($text !~ /\GXb*X/g, $message);
84281c31 862 }
a4c04bdc 863
84281c31
A
864 {
865 $_ = "xA\n" x 500;
b33825c4 866 unlike($_, qr/^\s*A/m, '$_ = "xA\n" x 500; /^\s*A/m"');
a4c04bdc 867
84281c31
A
868 my $text = "abc dbf";
869 my @res = ($text =~ /.*?(b).*?\b/g);
de26e0cc 870 is("@res", "b b", '\b is not special');
987aaf07 871 }
a4c04bdc 872
84281c31 873 {
4f890a30 874 my $message = '\S, [\S], \s, [\s]';
84281c31 875 my @a = map chr, 0 .. 255;
9d45b377
YO
876 my @b = grep m/\S/, @a;
877 my @c = grep m/[^\s]/, @a;
4f890a30 878 is("@b", "@c", $message);
84281c31
A
879
880 @b = grep /\S/, @a;
881 @c = grep /[\S]/, @a;
4f890a30 882 is("@b", "@c", $message);
84281c31
A
883
884 @b = grep /\s/, @a;
885 @c = grep /[^\S]/, @a;
4f890a30 886 is("@b", "@c", $message);
84281c31
A
887
888 @b = grep /\s/, @a;
889 @c = grep /[\s]/, @a;
4f890a30 890 is("@b", "@c", $message);
84281c31
A
891 }
892 {
4f890a30 893 my $message = '\D, [\D], \d, [\d]';
84281c31
A
894 my @a = map chr, 0 .. 255;
895 my @b = grep /\D/, @a;
896 my @c = grep /[^\d]/, @a;
4f890a30 897 is("@b", "@c", $message);
84281c31
A
898
899 @b = grep /\D/, @a;
900 @c = grep /[\D]/, @a;
4f890a30 901 is("@b", "@c", $message);
84281c31
A
902
903 @b = grep /\d/, @a;
904 @c = grep /[^\D]/, @a;
4f890a30 905 is("@b", "@c", $message);
84281c31
A
906
907 @b = grep /\d/, @a;
908 @c = grep /[\d]/, @a;
4f890a30 909 is("@b", "@c", $message);
84281c31
A
910 }
911 {
4f890a30 912 my $message = '\W, [\W], \w, [\w]';
84281c31
A
913 my @a = map chr, 0 .. 255;
914 my @b = grep /\W/, @a;
915 my @c = grep /[^\w]/, @a;
4f890a30 916 is("@b", "@c", $message);
84281c31
A
917
918 @b = grep /\W/, @a;
919 @c = grep /[\W]/, @a;
4f890a30 920 is("@b", "@c", $message);
84281c31
A
921
922 @b = grep /\w/, @a;
923 @c = grep /[^\W]/, @a;
4f890a30 924 is("@b", "@c", $message);
84281c31
A
925
926 @b = grep /\w/, @a;
927 @c = grep /[\w]/, @a;
4f890a30 928 is("@b", "@c", $message);
84281c31 929 }
a4c04bdc 930
84281c31
A
931 {
932 # see if backtracking optimization works correctly
4f890a30
NC
933 my $message = 'Backtrack optimization';
934 like("\n\n", qr/\n $ \n/x, $message);
935 like("\n\n", qr/\n* $ \n/x, $message);
936 like("\n\n", qr/\n+ $ \n/x, $message);
937 like("\n\n", qr/\n? $ \n/x, $message);
938 like("\n\n", qr/\n*? $ \n/x, $message);
939 like("\n\n", qr/\n+? $ \n/x, $message);
940 like("\n\n", qr/\n?? $ \n/x, $message);
941 unlike("\n\n", qr/\n*+ $ \n/x, $message);
942 unlike("\n\n", qr/\n++ $ \n/x, $message);
943 like("\n\n", qr/\n?+ $ \n/x, $message);
84281c31 944 }
a4c04bdc 945
84281c31
A
946 {
947 package S;
948 use overload '""' => sub {'Object S'};
949 sub new {bless []}
0f289c68 950
4f890a30 951 my $message = "Ref stringification";
5895685f
NC
952 ::ok(do { \my $v} =~ /^SCALAR/, "Scalar ref stringification") or diag($message);
953 ::ok(do {\\my $v} =~ /^REF/, "Ref ref stringification") or diag($message);
954 ::ok([] =~ /^ARRAY/, "Array ref stringification") or diag($message);
955 ::ok({} =~ /^HASH/, "Hash ref stringification") or diag($message);
956 ::ok('S' -> new =~ /^Object S/, "Object stringification") or diag($message);
84281c31 957 }
a4c04bdc 958
84281c31 959 {
4f890a30
NC
960 my $message = "Test result of match used as match";
961 ok('a1b' =~ ('xyz' =~ /y/), $message);
962 is($`, 'a', $message);
963 ok('a1b' =~ ('xyz' =~ /t/), $message);
964 is($`, 'a', $message);
84281c31 965 }
a4c04bdc 966
84281c31 967 {
d728c370 968 my $message = '"1" is not \s';
c11a8df3
NC
969 warning_is(sub {unlike("1\n" x 102, qr/^\s*\n/m, $message)},
970 undef, "$message (did not warn)");
84281c31 971 }
a4c04bdc 972
84281c31 973 {
4f890a30 974 my $message = '\s, [[:space:]] and [[:blank:]]';
84281c31
A
975 my %space = (spc => " ",
976 tab => "\t",
977 cr => "\r",
978 lf => "\n",
979 ff => "\f",
980 # There's no \v but the vertical tabulator seems miraculously
981 # be 11 both in ASCII and EBCDIC.
982 vt => chr(11),
983 false => "space");
984
985 my @space0 = sort grep {$space {$_} =~ /\s/ } keys %space;
986 my @space1 = sort grep {$space {$_} =~ /[[:space:]]/} keys %space;
987 my @space2 = sort grep {$space {$_} =~ /[[:blank:]]/} keys %space;
988
4f890a30
NC
989 is("@space0", "cr ff lf spc tab", $message);
990 is("@space1", "cr ff lf spc tab vt", $message);
991 is("@space2", "spc tab", $message);
84281c31 992 }
a4c04bdc 993
ff3f963a 994 {
c9415951 995 my $n= 50;
93f09d7b 996 # this must be a high number and go from 0 to N, as the bug we are looking for doesn't
c9415951
YO
997 # seem to be predictable. Slight changes to the test make it fail earlier or later.
998 foreach my $i (0 .. $n)
999 {
1000 my $str= "\n" x $i;
93f09d7b 1001 ok $str=~/.*\z/, "implicit MBOL check string disable does not break things length=$i";
c9415951
YO
1002 }
1003 }
92f3d482
YO
1004 {
1005 # we are actually testing that we dont die when executing these patterns
1006 use utf8;
1007 my $e = "Böck";
1008 ok(utf8::is_utf8($e),"got a unicode string - rt75680");
1009
1010 ok($e !~ m/.*?[x]$/, "unicode string against /.*?[x]\$/ - rt75680");
1011 ok($e !~ m/.*?\p{Space}$/i, "unicode string against /.*?\\p{space}\$/i - rt75680");
1012 ok($e !~ m/.*?[xyz]$/, "unicode string against /.*?[xyz]\$/ - rt75680");
1013 ok($e !~ m/(.*?)[,\p{isSpace}]+((?:\p{isAlpha}[\p{isSpace}\.]{1,2})+)\p{isSpace}*$/, "unicode string against big pattern - rt75680");
1014 }
1015 {
1016 # we are actually testing that we dont die when executing these patterns
1017 my $e = "B\x{f6}ck";
1018 ok(!utf8::is_utf8($e), "got a latin string - rt75680");
1019
1020 ok($e !~ m/.*?[x]$/, "latin string against /.*?[x]\$/ - rt75680");
1021 ok($e !~ m/.*?\p{Space}$/i, "latin string against /.*?\\p{space}\$/i - rt75680");
1022 ok($e !~ m/.*?[xyz]$/,"latin string against /.*?[xyz]\$/ - rt75680");
1023 ok($e !~ m/(.*?)[,\p{isSpace}]+((?:\p{isAlpha}[\p{isSpace}\.]{1,2})+)\p{isSpace}*$/,"latin string against big pattern - rt75680");
1024 }
c920e018
A
1025
1026 {
1027 #
1028 # Tests for bug 77414.
1029 #
1030
4f890a30 1031 my $message = '\p property after empty * match';
c920e018 1032 {
04934b6d 1033 local $::TODO = "Bug 77414";
4f890a30
NC
1034 like("1", qr/\s*\pN/, $message);
1035 like("-", qr/\s*\p{Dash}/, $message);
1036 like(" ", qr/\w*\p{Blank}/, $message);
c920e018
A
1037 }
1038
4f890a30
NC
1039 like("1", qr/\s*\pN+/, $message);
1040 like("-", qr/\s*\p{Dash}{1}/, $message);
1041 like(" ", qr/\w*\p{Blank}{1,4}/, $message);
c920e018
A
1042
1043 }
1044
7c17ea2f
KW
1045 SKIP: { # Some constructs with Latin1 characters cause a utf8 string not
1046 # to match itself in non-utf8
ef237063 1047 if ($::IS_EBCDIC) {
7c17ea2f
KW
1048 skip "Needs to be customized to run on EBCDIC", 6;
1049 }
634c83a2
KW
1050 my $c = "\xc0";
1051 my $pattern = my $utf8_pattern = qr/((\xc0)+,?)/;
1052 utf8::upgrade($utf8_pattern);
1053 ok $c =~ $pattern, "\\xc0 =~ $pattern; Neither pattern nor target utf8";
d4e0b827 1054 ok $c =~ /$pattern/i, "\\xc0 =~ /$pattern/i; Neither pattern nor target utf8";
634c83a2 1055 ok $c =~ $utf8_pattern, "\\xc0 =~ $pattern; pattern utf8, target not";
d4e0b827 1056 ok $c =~ /$utf8_pattern/i, "\\xc0 =~ /$pattern/i; pattern utf8, target not";
634c83a2
KW
1057 utf8::upgrade($c);
1058 ok $c =~ $pattern, "\\xc0 =~ $pattern; target utf8, pattern not";
d4e0b827 1059 ok $c =~ /$pattern/i, "\\xc0 =~ /$pattern/i; target utf8, pattern not";
634c83a2 1060 ok $c =~ $utf8_pattern, "\\xc0 =~ $pattern; Both target and pattern utf8";
d4e0b827 1061 ok $c =~ /$utf8_pattern/i, "\\xc0 =~ /$pattern/i; Both target and pattern utf8";
634c83a2
KW
1062 }
1063
8cc86590 1064 SKIP: { # Make sure can override the formatting
ef237063 1065 if ($::IS_EBCDIC) {
8cc86590
KW
1066 skip "Needs to be customized to run on EBCDIC", 2;
1067 }
1068 use feature 'unicode_strings';
1069 ok "\xc0" =~ /\w/, 'Under unicode_strings: "\xc0" =~ /\w/';
1070 ok "\xc0" !~ /(?d:\w)/, 'Under unicode_strings: "\xc0" !~ /(?d:\w)/';
1071 }
1072
704f71be
B
1073 {
1074 # Test that a regex followed by an operator and/or a statement modifier work
1075 # These tests use string-eval so that it reports a clean error when it fails
1076 # (without the string eval the test script might be unparseable)
1077
1078 # Note: these test check the behaviour that currently is valid syntax
93f09d7b 1079 # If a new regex modifier is added and a test fails then there is a backwards-compatibility issue
704f71be
B
1080 # Note-2: a new deprecate warning was added for this with commit e6897b1a5db0410e387ccbf677e89fc4a1d8c97a
1081 # which indicate that this syntax will be removed in 5.16.
1082 # When this happens the tests can be removed
1083
e16f9c76
NC
1084 foreach (['my $r = "a" =~ m/a/lt 2', 'm', 'lt'],
1085 ['my $r = "a" =~ m/a/le 1', 'm', 'le'],
1086 ['my $r = "a" =~ m/a/eq 1', 'm', 'eq'],
1087 ['my $r = "a" =~ m/a/ne 0', 'm', 'ne'],
1088 ['my $r = "a" =~ m/a/and 1', 'm', 'and'],
1089 ['my $r = "a" =~ m/a/unless 0', 'm', 'unless'],
1090 ['my $c = 1; my $r; $r = "a" =~ m/a/while $c--', 'm', 'while'],
1091 ['my $c = 0; my $r; $r = "a" =~ m/a/until $c++', 'm', 'until'],
1092 ['my $r; $r = "a" =~ m/a/for 1', 'm', 'for'],
1093 ['my $r; $r = "a" =~ m/a/foreach 1', 'm', 'foreach'],
1094
1095 ['my $t = "a"; my $r = $t =~ s/a//lt 2', 's', 'lt'],
1096 ['my $t = "a"; my $r = $t =~ s/a//le 1', 's', 'le'],
1097 ['my $t = "a"; my $r = $t =~ s/a//ne 0', 's', 'ne'],
1098 ['my $t = "a"; my $r = $t =~ s/a//and 1', 's', 'and'],
1099 ['my $t = "a"; my $r = $t =~ s/a//unless 0', 's', 'unless'],
1100
1101 ['my $c = 1; my $r; my $t = "a"; $r = $t =~ s/a//while $c--', 's', 'while'],
1102 ['my $c = 0; my $r; my $t = "a"; $r = $t =~ s/a//until $c++', 's', 'until'],
1103 ['my $r; my $t = "a"; $r = $t =~ s/a//for 1', 's', 'for'],
1104 ['my $r; my $t = "a"; $r = $t =~ s/a//for 1', 's', 'foreach'],
1105 ) {
1106 my $message = sprintf 'regex (%s) followed by $_->[2]',
1107 $_->[1] eq 'm' ? 'm//' : 's///';
1108 my $code = "$_->[0]; 'eval_ok ' . \$r";
1109 my $result = do {
1110 no warnings 'syntax';
1111 eval $code;
1112 };
1113 is($@, '', $message);
1114 is($result, 'eval_ok 1', $message);
1115 }
704f71be
B
1116 }
1117
5b6010b3
YO
1118 {
1119 my $str= "\x{100}";
1120 chop $str;
1121 my $qr= qr/$str/;
de26e0cc 1122 is("$qr", "(?^:)", "Empty pattern qr// stringifies to (?^:) with unicode flag enabled - Bug #80212");
5b6010b3
YO
1123 $str= "";
1124 $qr= qr/$str/;
de26e0cc 1125 is("$qr", "(?^:)", "Empty pattern qr// stringifies to (?^:) with unicode flag disabled - Bug #80212");
5b6010b3
YO
1126
1127 }
1128
72aa120d 1129 {
04934b6d 1130 local $::TODO = "[perl #38133]";
72aa120d
KW
1131
1132 "A" =~ /(((?:A))?)+/;
1133 my $first = $2;
1134
1135 "A" =~ /(((A))?)+/;
1136 my $second = $2;
1137
de26e0cc 1138 is($first, $second);
72aa120d
KW
1139 }
1140
99ca48e1
DM
1141 {
1142 # RT #3516: \G in a m//g expression causes problems
1143 my $count = 0;
1144 while ("abc" =~ m/(\G[ac])?/g) {
1145 last if $count++ > 10;
1146 }
1147 ok($count < 10, 'RT #3516 A');
1148
1149 $count = 0;
1150 while ("abc" =~ m/(\G|.)[ac]/g) {
1151 last if $count++ > 10;
1152 }
1153 ok($count < 10, 'RT #3516 B');
1154
1155 $count = 0;
1156 while ("abc" =~ m/(\G?[ac])?/g) {
1157 last if $count++ > 10;
1158 }
1159 ok($count < 10, 'RT #3516 C');
1160 }
84281c31
A
1161} # End of sub run_tests
1162
11631;